/* roulang page: index */
:root {
            --primary: #1a3c34;
            --primary-dark: #0f2a24;
            --primary-mid: #245247;
            --primary-light: #3a6f62;
            --accent: #c5813a;
            --accent-dark: #a06828;
            --accent-light: #e0a458;
            --accent-pale: #f5e8d3;
            --bg: #f7f5f0;
            --bg-warm: #f0ede6;
            --card: #ffffff;
            --text: #1e2120;
            --text-strong: #161918;
            --text-mid: #3c4340;
            --text-light: #5a605d;
            --text-muted: #7d8480;
            --border: #ddd9d0;
            --border-light: #ece9e2;
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 20px;
            --shadow-xs: 0 1px 4px rgba(15, 42, 36, 0.05);
            --shadow-sm: 0 2px 12px rgba(15, 42, 36, 0.06);
            --shadow-md: 0 4px 18px rgba(15, 42, 36, 0.08);
            --shadow-lg: 0 8px 28px rgba(15, 42, 36, 0.12);
            --shadow-xl: 0 16px 48px rgba(15, 42, 36, 0.16);
            --font-family: system-ui, -apple-system, "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --sidebar-width: 260px;
            --header-height: 64px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            letter-spacing: 0.02em;
        }

        a {
            color: var(--primary-mid);
            text-decoration: none;
            transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: var(--font-family);
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(197, 129, 58, 0.45);
            outline-offset: 2px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.4;
            color: var(--text-strong);
            margin-top: 0;
        }

        h1 {
            font-size: 2.4rem;
            letter-spacing: 0.03em;
            line-height: 1.32;
        }

        h2 {
            font-size: 1.6rem;
            letter-spacing: 0.015em;
            line-height: 1.42;
            margin-bottom: 0.6rem;
        }

        h3 {
            font-size: 1.18rem;
            letter-spacing: 0.01em;
            line-height: 1.45;
            margin-bottom: 0.4rem;
        }

        p {
            margin-bottom: 1.2rem;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding-top: 64px;
            padding-bottom: 64px;
        }

        .section-alt {
            background-color: var(--bg-warm);
        }

        .section-tight {
            padding-top: 40px;
            padding-bottom: 40px;
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-dark);
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-header .eyebrow::before {
            content: '';
            display: inline-block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .section-header h2 {
            margin-bottom: 6px;
        }

        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            line-height: 1.85;
            max-width: 720px;
            margin: 0 auto;
        }

        .section-header.text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 8px rgba(15, 42, 36, 0.04);
            min-height: var(--header-height);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 0 24px;
            max-width: 1200px;
            margin: 0 auto;
            height: var(--header-height);
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--primary);
            letter-spacing: 0.04em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .logo-link:hover {
            color: var(--primary);
            opacity: 0.8;
        }

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-light);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .main-nav::-webkit-scrollbar {
            display: none;
        }

        .main-nav .nav-link {
            padding: 8px 14px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-mid);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            letter-spacing: 0.02em;
            transition: color var(--transition-fast), background-color var(--transition-fast);
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 60, 52, 0.06);
        }

        .main-nav .nav-link.active {
            color: var(--primary);
            background: rgba(26, 60, 52, 0.1);
            font-weight: 700;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-left: auto;
            flex-shrink: 0;
        }

        .search-form {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-warm);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 4px 12px;
            position: relative;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .search-form:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 60, 52, 0.12);
        }

        .search-form input {
            border: none;
            background: transparent;
            padding: 4px 2px;
            font-size: 0.85rem;
            width: 180px;
            color: var(--text);
            outline: none;
        }

        .search-form input::placeholder {
            color: var(--text-muted);
        }

        .search-form .search-icon-btn {
            background: none;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            padding: 2px 4px;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
        }

        .version-select,
        .lang-select {
            border: 1px solid var(--border);
            background: var(--card);
            border-radius: var(--radius-sm);
            padding: 6px 8px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-mid);
            cursor: pointer;
            letter-spacing: 0.03em;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .version-select:focus,
        .lang-select:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 60, 52, 0.12);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            color: var(--text-mid);
            font-size: 1.1rem;
            cursor: pointer;
            transition: background-color var(--transition-fast);
        }

        .mobile-toggle:hover {
            background: var(--bg-warm);
        }

        /* Sidebar */
        .page-layout {
            display: flex;
            gap: 32px;
            padding-top: 40px;
            padding-bottom: 56px;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .doc-sidebar {
            flex-shrink: 0;
            width: var(--sidebar-width);
            position: sticky;
            top: calc(var(--header-height) + 20px);
            align-self: flex-start;
            max-height: calc(100vh - var(--header-height) - 40px);
            overflow-y: auto;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 20px 16px;
        }

        .doc-sidebar .sidebar-title {
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: var(--text-muted);
            text-transform: uppercase;
            margin-bottom: 12px;
            padding-left: 4px;
        }

        .doc-sidebar .sidebar-group {
            margin-bottom: 16px;
        }

        .doc-sidebar .sidebar-group-title {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-light);
            letter-spacing: 0.04em;
            margin-bottom: 6px;
            padding-left: 4px;
        }

        .doc-sidebar a {
            display: block;
            padding: 6px 8px;
            font-size: 0.86rem;
            font-weight: 500;
            color: var(--text-mid);
            border-radius: 6px;
            border-left: 3px solid transparent;
            transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
        }

        .doc-sidebar a:hover {
            color: var(--primary);
            background: rgba(26, 60, 52, 0.05);
        }

        .doc-sidebar a.active {
            color: var(--primary);
            background: rgba(26, 60, 52, 0.08);
            border-left-color: var(--primary);
            font-weight: 600;
        }

        .main-content {
            flex: 1;
            min-width: 0;
        }

        /* Hero */
        .hero {
            position: relative;
            background: url('/assets/images/9fc0a91c9b103d06.webp') center/cover no-repeat;
            background-color: var(--primary-dark);
            color: #f0ede5;
            padding: 80px 0 56px;
            border-radius: 0 0 28px 28px;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 32, 27, 0.88) 0%, rgba(18, 48, 40, 0.78) 45%, rgba(10, 28, 24, 0.9) 100%);
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 20%, rgba(197, 129, 58, 0.16) 0%, transparent 55%);
            z-index: 1;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .hero-badge-row {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
        }

        .level-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(197, 129, 58, 0.25);
            color: #e8c9a0;
            border: 1px solid rgba(197, 129, 58, 0.45);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.05em;
        }

        .level-badge i {
            font-size: 0.9rem;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 20px;
            padding: 6px 14px;
            font-size: 0.8rem;
            color: #d8d5cc;
        }

        .hero h1 {
            color: #f5f2e9;
            font-size: 2.6rem;
            font-weight: 800;
            letter-spacing: 0.04em;
            line-height: 1.3;
            margin-bottom: 20px;
            max-width: 820px;
            text-wrap: balance;
        }

        .hero h1 .accent-text {
            color: var(--accent-light);
        }

        .hero-desc {
            font-size: 1.02rem;
            line-height: 1.9;
            color: #c9c5ba;
            max-width: 760px;
            margin-bottom: 32px;
            letter-spacing: 0.015em;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 36px;
        }

        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #1a140e;
            border: none;
            border-radius: 10px;
            padding: 12px 24px;
            font-size: 0.95rem;
            font-weight: 700;
            letter-spacing: 0.03em;
            cursor: pointer;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
        }

        .btn-primary-custom:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(197, 129, 58, 0.35);
        }

        .btn-primary-custom:active {
            transform: translateY(0);
        }

        .btn-secondary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: #e0ddd5;
            border: 1px solid rgba(255, 255, 255, 0.35);
            border-radius: 10px;
            padding: 12px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            cursor: pointer;
            transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
        }

        .btn-secondary-custom:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.55);
            color: #fff;
        }

        .hero-mini-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 20px 36px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        .hero-mini-stat {
            display: flex;
            align-items: baseline;
            gap: 8px;
        }

        .hero-mini-stat .stat-value {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-light);
        }

        .hero-mini-stat .stat-label {
            font-size: 0.82rem;
            color: #b8b5ab;
            letter-spacing: 0.03em;
        }

        /* Metric cards */
        .metric-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: -28px;
            position: relative;
            z-index: 5;
        }

        .metric-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 22px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

        .metric-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .metric-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 12px;
            font-size: 1.3rem;
            color: var(--primary);
            background: rgba(26, 60, 52, 0.08);
        }

        .metric-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: 0.02em;
        }

        .metric-unit {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-muted);
            margin-left: 2px;
        }

        .metric-label {
            font-size: 0.88rem;
            color: var(--text-light);
            margin-top: 6px;
            font-weight: 500;
        }

        /* Cards */
        .card-custom {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
            height: 100%;
        }

        .card-custom:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--border);
        }

        .card-custom .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
            background: rgba(26, 60, 52, 0.08);
            color: var(--primary);
        }

        .card-custom .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .card-custom .card-text {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 0;
        }

        .card-custom .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(197, 129, 58, 0.12);
            color: var(--accent-dark);
            margin-bottom: 10px;
            letter-spacing: 0.03em;
        }

        /* Service grid with offset */
        .service-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 20px;
        }

        .service-grid .service-card-main {
            grid-row: span 2;
            min-height: 320px;
            background: var(--primary);
            color: #f0ede5;
            border: none;
            padding: 32px 28px;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .service-card-main .card-title {
            color: #f5f2e9;
            font-size: 1.3rem;
            margin-bottom: 12px;
        }

        .service-card-main .card-text {
            color: #c9c5ba;
            font-size: 0.95rem;
            line-height: 1.85;
        }

        .service-card-main .highlight-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--accent-light);
            line-height: 1.1;
        }

        /* Compare */
        .compare-wrap {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .compare-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .compare-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }

        .compare-card.recommended {
            border: 2px solid var(--accent);
            box-shadow: var(--shadow-md);
        }

        .compare-card .recommended-badge {
            position: absolute;
            top: -12px;
            right: 16px;
            background: var(--accent);
            color: #1a140e;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 12px;
            letter-spacing: 0.04em;
        }

        .compare-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            color: var(--text-strong);
        }

        .compare-item {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        .compare-item:last-child {
            border-bottom: none;
        }

        .compare-item .check {
            color: var(--primary-light);
            font-weight: 700;
            flex-shrink: 0;
        }

        .compare-item .cross {
            color: #c0564a;
            font-weight: 700;
            flex-shrink: 0;
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 28px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 4px;
            bottom: 4px;
            width: 2px;
            background: var(--border);
        }

        .timeline-item {
            position: relative;
            padding-bottom: 28px;
            padding-left: 16px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -24px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent);
            border: 3px solid #fff;
            box-shadow: 0 0 0 2px var(--accent);
            z-index: 1;
        }

        .timeline-item .timeline-year {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-dark);
            letter-spacing: 0.05em;
            margin-bottom: 2px;
        }

        .timeline-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-strong);
        }

        .timeline-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
            line-height: 1.75;
        }

        /* News list */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .news-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

        .news-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .news-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }

        .news-card .news-body {
            padding: 18px 20px;
        }

        .news-card .news-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 6px;
            letter-spacing: 0.04em;
        }

        .news-card .news-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-strong);
            line-height: 1.5;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-summary {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0;
        }

        /* Platform assurance */
        .assurance-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .assurance-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 22px 20px;
            text-align: center;
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-base);
        }

        .assurance-item:hover {
            box-shadow: var(--shadow-md);
        }

        .assurance-item .assurance-icon {
            font-size: 1.8rem;
            color: var(--accent-dark);
            margin-bottom: 10px;
        }

        .assurance-item h4 {
            font-size: 0.98rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-strong);
        }

        .assurance-item p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Quick faq */
        .quick-faq-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .quick-faq-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 18px 20px;
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-base);
        }

        .quick-faq-item:hover {
            box-shadow: var(--shadow-sm);
        }

        .quick-faq-item .qa-question {
            font-weight: 700;
            font-size: 0.92rem;
            color: var(--text-strong);
            margin-bottom: 6px;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .quick-faq-item .qa-question::before {
            content: 'Q';
            font-weight: 800;
            color: var(--accent);
            flex-shrink: 0;
        }

        .quick-faq-item .qa-answer {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.75;
            margin-bottom: 0;
            padding-left: 24px;
        }

        /* Full FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-xs);
        }

        .faq-item .faq-question {
            padding: 18px 22px;
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--text-strong);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background-color var(--transition-fast);
            user-select: none;
        }

        .faq-item .faq-question:hover {
            background: rgba(26, 60, 52, 0.04);
        }

        .faq-item .faq-question .faq-toggle-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(26, 60, 52, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            color: var(--primary);
            transition: transform var(--transition-fast);
        }

        .faq-item.open .faq-question .faq-toggle-icon {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.85;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* Form */
        .lead-form-wrap {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            box-shadow: var(--shadow-md);
            max-width: 780px;
            margin: 0 auto;
        }

        .lead-form-wrap .form-label {
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-mid);
            margin-bottom: 4px;
        }

        .lead-form-wrap .form-control {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.92rem;
            color: var(--text);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .lead-form-wrap .form-control:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 60, 52, 0.1);
        }

        .lead-form-wrap .form-select {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.92rem;
            color: var(--text);
            cursor: pointer;
        }

        .lead-form-wrap .form-select:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 60, 52, 0.1);
        }

        .lead-form-wrap textarea.form-control {
            min-height: 100px;
            resize: vertical;
        }

        .privacy-note {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 8px;
        }

        /* Partner */
        .partner-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 14px;
        }

        .partner-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 18px 14px;
            text-align: center;
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }

        .partner-card:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--border);
        }

        .partner-card .partner-logo-icon {
            font-size: 1.8rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .partner-card .partner-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-mid);
            letter-spacing: 0.03em;
        }

        /* Download */
        .download-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .download-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 24px 22px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

        .download-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .download-card .dl-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .download-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-strong);
        }

        .download-card p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .download-card .dl-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }

        /* Brand intro */
        .brand-intro {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 36px 40px;
            box-shadow: var(--shadow-sm);
        }

        .brand-intro h2 {
            margin-bottom: 16px;
        }

        .brand-intro p {
            font-size: 1rem;
            color: var(--text-light);
            line-height: 1.95;
            margin-bottom: 14px;
        }

        /* Resource link */
        .resource-link-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .resource-link-card {
            background: var(--bg-warm);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 16px 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: background-color var(--transition-fast), border-color var(--transition-fast);
        }

        .resource-link-card:hover {
            background: var(--card);
            border-color: var(--border);
        }

        .resource-link-card .link-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary);
            color: var(--accent-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .resource-link-card .link-text {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-mid);
        }

        /* Version route */
        .route-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .route-item {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 14px 18px;
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-base);
        }

        .route-item:hover {
            box-shadow: var(--shadow-sm);
        }

        .route-item .route-badge {
            background: var(--primary);
            color: #f0ede5;
            border-radius: var(--radius-sm);
            padding: 6px 12px;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }

        .route-item .route-desc {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* Exhibition guide */
        .guide-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .guide-step {
            text-align: center;
            padding: 20px 16px;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            box-shadow: var(--shadow-xs);
        }

        .guide-step .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--accent);
            color: #1a140e;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            margin: 0 auto 10px;
        }

        .guide-step h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-strong);
        }

        .guide-step p {
            font-size: 0.83rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: #b8b5ab;
            padding: 48px 0 28px;
            margin-top: 32px;
            border-radius: 28px 28px 0 0;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .footer-top {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-bottom: 32px;
            padding-bottom: 24px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand {
            flex: 1;
            min-width: 220px;
        }

        .footer-brand .logo-link {
            color: #f0ede5;
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .footer-brand .footer-desc {
            font-size: 0.85rem;
            color: #9a978c;
            line-height: 1.8;
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 36px;
        }

        .footer-link-group h4 {
            font-size: 0.88rem;
            font-weight: 700;
            color: #e0ddd5;
            letter-spacing: 0.04em;
            margin-bottom: 10px;
        }

        .footer-link-group a {
            display: block;
            font-size: 0.85rem;
            color: #a8a59a;
            padding: 3px 0;
            transition: color var(--transition-fast);
        }

        .footer-link-group a:hover {
            color: var(--accent-light);
        }

        .footer-bottom {
            text-align: center;
            font-size: 0.8rem;
            color: #7d7a70;
            line-height: 1.9;
        }

        .footer-bottom a {
            color: #a8a59a;
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        .footer-bottom .footer-divider {
            color: #5a574e;
            margin: 0 6px;
        }

        .footer-icp {
            margin-top: 6px;
        }

        .footer-icp a {
            color: #7d7a70;
        }

        .footer-icp a:hover {
            color: var(--accent-light);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .metric-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-grid {
                grid-template-columns: 1fr 1fr;
            }
            .service-grid .service-card-main {
                grid-column: 1 / -1;
                grid-row: auto;
                min-height: auto;
            }
            .compare-wrap {
                grid-template-columns: 1fr;
                max-width: 520px;
                margin: 0 auto;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .assurance-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .quick-faq-list {
                grid-template-columns: 1fr;
            }
            .partner-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .download-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .guide-steps {
                grid-template-columns: repeat(2, 1fr);
            }
            .resource-link-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 991px) {
            .doc-sidebar {
                display: none;
            }
            .page-layout {
                padding-top: 20px;
            }
            .main-nav {
                display: none;
            }
            .mobile-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .header-inner {
                justify-content: space-between;
            }
            .header-actions {
                margin-left: 0;
            }
            .search-form {
                display: none;
            }
            h1 {
                font-size: 2rem;
            }
            .hero {
                padding: 56px 0 40px;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .metric-grid {
                margin-top: -20px;
                padding: 0 16px;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-layout {
                padding-left: 16px;
                padding-right: 16px;
            }
            h1 {
                font-size: 1.75rem;
            }
            h2 {
                font-size: 1.35rem;
            }
            .hero {
                padding: 40px 0 32px;
                border-radius: 0 0 18px 18px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero .hero-badge-row {
                gap: 8px;
                margin-bottom: 16px;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .btn-primary-custom,
            .btn-secondary-custom {
                justify-content: center;
                width: 100%;
            }
            .metric-grid {
                grid-template-columns: 1fr;
                margin-top: -16px;
                gap: 12px;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .assurance-grid {
                grid-template-columns: 1fr;
            }
            .partner-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .download-grid {
                grid-template-columns: 1fr;
            }
            .guide-steps {
                grid-template-columns: 1fr;
            }
            .resource-link-grid {
                grid-template-columns: 1fr;
            }
            .lead-form-wrap {
                padding: 24px 18px;
            }
            .timeline {
                padding-left: 20px;
            }
            .timeline-item {
                padding-left: 8px;
            }
            .footer-top {
                flex-direction: column;
                gap: 24px;
            }
            .footer-links {
                gap: 20px;
            }
        }

        @media (max-width: 576px) {
            header .header-inner {
                padding: 0 12px;
            }
            .logo-link {
                font-size: 1rem;
            }
            .logo-mark {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
            .version-select,
            .lang-select {
                font-size: 0.72rem;
                padding: 4px 6px;
            }
            .section-header h2 {
                font-size: 1.25rem;
            }
            .hero-mini-stats {
                flex-direction: column;
                gap: 8px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1a3c34;
            --primary-dark: #0f2a24;
            --primary-mid: #245247;
            --primary-light: #3a6f62;
            --accent: #c5813a;
            --accent-dark: #a06828;
            --accent-light: #e0a458;
            --accent-pale: #f5e8d3;
            --bg: #f7f5f0;
            --bg-warm: #f0ede6;
            --card: #ffffff;
            --text: #1e2120;
            --text-strong: #161918;
            --text-mid: #3c4340;
            --text-light: #5a605d;
            --text-muted: #7d8480;
            --border: #ddd9d0;
            --border-light: #ece9e2;
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 20px;
            --shadow-xs: 0 1px 4px rgba(15, 42, 36, 0.05);
            --shadow-sm: 0 2px 12px rgba(15, 42, 36, 0.06);
            --shadow-md: 0 4px 18px rgba(15, 42, 36, 0.08);
            --shadow-lg: 0 8px 28px rgba(15, 42, 36, 0.12);
            --shadow-xl: 0 16px 48px rgba(15, 42, 36, 0.16);
            --font-family: system-ui, -apple-system, "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --sidebar-width: 260px;
            --header-height: 64px;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            letter-spacing: 0.02em;
        }
        a {
            color: var(--primary-mid);
            text-decoration: none;
            transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: var(--font-family);
            font-size: inherit;
            line-height: inherit;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(197, 129, 58, 0.45);
            outline-offset: 2px;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding-top: 64px;
            padding-bottom: 64px;
        }
        .section-alt {
            background-color: var(--bg-warm);
        }
        .section-tight {
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .section-header {
            margin-bottom: 32px;
        }
        .section-header .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-dark);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header .eyebrow::before {
            content: '';
            display: inline-block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .section-header h2 {
            margin-bottom: 6px;
            color: var(--text-strong);
            font-weight: 700;
            font-size: 1.65rem;
            line-height: 1.4;
        }
        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            line-height: 1.85;
            max-width: 720px;
            margin: 0;
        }
        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 8px rgba(15, 42, 36, 0.04);
            min-height: var(--header-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 0 24px;
            max-width: 1200px;
            margin: 0 auto;
            height: var(--header-height);
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--primary);
            letter-spacing: 0.04em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
            flex-shrink: 0;
        }
        .logo-link:hover {
            color: var(--primary);
            opacity: 0.8;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-light);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2px;
            margin: 0 auto;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
        }
        .main-nav::-webkit-scrollbar {
            display: none;
        }
        .main-nav .nav-link {
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-mid);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: color var(--transition-fast), background-color var(--transition-fast);
        }
        .main-nav .nav-link:hover {
            color: var(--primary);
            background-color: var(--accent-pale);
        }
        .main-nav .nav-link.active {
            color: var(--primary);
            background-color: var(--accent-pale);
            font-weight: 700;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            margin-left: 8px;
        }
        .header-search {
            position: relative;
            width: 200px;
        }
        .header-search .search-input {
            width: 100%;
            height: 36px;
            padding: 0 12px 0 34px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--card);
            color: var(--text);
            font-size: 0.88rem;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .header-search .search-input:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(58, 111, 98, 0.18);
        }
        .header-search .search-icon {
            position: absolute;
            left: 10px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-muted);
            font-size: 0.85rem;
            pointer-events: none;
        }
        .header-select {
            height: 36px;
            padding: 0 8px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--card);
            color: var(--text-mid);
            font-size: 0.85rem;
            cursor: pointer;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .header-select:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(58, 111, 98, 0.18);
        }
        .navbar-toggler {
            display: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 6px 10px;
            background: var(--card);
            color: var(--primary);
            font-size: 1rem;
        }
        /* Breadcrumb */
        .breadcrumb-wrap {
            background: var(--bg-warm);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            font-size: 0.87rem;
            color: var(--text-muted);
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb li + li::before {
            content: '/';
            color: var(--text-muted);
            font-size: 0.82rem;
        }
        .breadcrumb a {
            color: var(--primary-mid);
            font-weight: 500;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--text-light);
            font-weight: 600;
        }
        /* Docs Layout */
        .docs-layout {
            display: flex;
            align-items: flex-start;
            gap: 28px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 24px;
            position: relative;
        }
        .docs-sidebar {
            width: var(--sidebar-width);
            flex-shrink: 0;
            position: sticky;
            top: calc(var(--header-height) + 20px);
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 20px 16px;
            max-height: calc(100vh - var(--header-height) - 40px);
            overflow-y: auto;
        }
        .docs-sidebar .sidebar-title {
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--text-muted);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .docs-sidebar .sidebar-group {
            margin-bottom: 18px;
        }
        .docs-sidebar .sidebar-link {
            display: block;
            padding: 7px 10px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--text-mid);
            transition: background-color var(--transition-fast), color var(--transition-fast);
            margin-bottom: 2px;
        }
        .docs-sidebar .sidebar-link:hover {
            background: var(--accent-pale);
            color: var(--primary);
        }
        .docs-sidebar .sidebar-link.active {
            background: var(--primary);
            color: #fff;
            border-left: 3px solid var(--accent);
            font-weight: 600;
        }
        .docs-sidebar .sidebar-divider {
            height: 1px;
            background: var(--border-light);
            margin: 14px 0;
        }
        .docs-sidebar .version-select {
            width: 100%;
            padding: 8px 10px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--card);
            color: var(--text-mid);
            font-size: 0.87rem;
            cursor: pointer;
            transition: border-color var(--transition-fast);
        }
        .docs-sidebar .version-select:focus {
            border-color: var(--primary-light);
        }
        .docs-main {
            flex: 1;
            min-width: 0;
        }
        /* Page Header (narrow band) */
        .page-head {
            border-bottom: 1px solid var(--border-light);
            padding-bottom: 20px;
            margin-bottom: 28px;
        }
        .page-head h1 {
            font-size: 2.1rem;
            font-weight: 800;
            color: var(--text-strong);
            line-height: 1.4;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        .page-head .h1-sub {
            font-size: 1rem;
            color: var(--text-light);
            line-height: 1.85;
            max-width: 780px;
        }
        /* Document Cards */
        .doc-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
        }
        .doc-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .doc-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .doc-card .doc-cover {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-warm);
            position: relative;
        }
        .doc-card .doc-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .doc-card:hover .doc-cover img {
            transform: scale(1.04);
        }
        .doc-card .doc-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .doc-card .doc-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-dark);
            background: var(--accent-pale);
            border-radius: 4px;
            padding: 3px 8px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .doc-card .doc-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-strong);
            line-height: 1.5;
            margin-bottom: 8px;
            transition: color var(--transition-fast);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .doc-card:hover .doc-title {
            color: var(--primary);
        }
        .doc-card .doc-summary {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .doc-card .doc-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .doc-meta .doc-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .doc-meta .doc-version {
            background: var(--bg-warm);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
            color: var(--text-mid);
        }
        /* View more button */
        .view-more-wrap {
            text-align: center;
            margin-top: 24px;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-outline-accent {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            color: var(--accent-dark);
            border: 1.5px solid var(--accent);
            border-radius: var(--radius-sm);
            padding: 9px 20px;
            font-size: 0.93rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }
        .btn-outline-accent:hover {
            background: var(--accent-pale);
            color: var(--accent-dark);
        }
        /* Version strip */
        .version-strip {
            background: var(--primary);
            border-radius: var(--radius);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 28px;
        }
        .version-strip .vs-text {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 500;
            line-height: 1.6;
        }
        .version-strip .vs-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent);
            color: #fff;
            border-radius: 4px;
            padding: 4px 10px;
            font-size: 0.82rem;
            font-weight: 700;
        }
        /* Category entry */
        .cat-entry-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 14px;
        }
        .cat-entry-card {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .cat-entry-card:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .cat-entry-card .cat-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--accent-pale);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-dark);
            font-size: 0.95rem;
            flex-shrink: 0;
        }
        .cat-entry-card .cat-info {
            font-size: 0.9rem;
            color: var(--text-mid);
            font-weight: 600;
            line-height: 1.4;
        }
        .cat-entry-card .cat-info small {
            display: block;
            font-weight: 400;
            color: var(--text-muted);
            font-size: 0.78rem;
        }
        /* Steps */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 16px;
            counter-reset: step;
        }
        .step-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 20px 18px;
            position: relative;
            counter-increment: step;
            transition: box-shadow var(--transition-base);
        }
        .step-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .step-item::before {
            content: counter(step);
            position: absolute;
            top: 16px;
            right: 16px;
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-pale);
            line-height: 1;
        }
        .step-item .step-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 6px;
        }
        .step-item .step-desc {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        /* Compare table-like cards */
        .compare-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 16px;
        }
        .compare-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 18px;
            transition: box-shadow var(--transition-base);
        }
        .compare-card:hover {
            box-shadow: var(--shadow-sm);
        }
        .compare-card .cc-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 10px;
            gap: 8px;
        }
        .compare-card .cc-name {
            font-weight: 700;
            color: var(--text-strong);
            font-size: 1rem;
        }
        .compare-card .cc-tag {
            font-size: 0.78rem;
            font-weight: 600;
            padding: 2px 8px;
            border-radius: 4px;
            background: var(--accent-pale);
            color: var(--accent-dark);
        }
        .compare-card .cc-item {
            display: flex;
            justify-content: space-between;
            gap: 8px;
            font-size: 0.87rem;
            padding: 6px 0;
            border-bottom: 1px dashed var(--border-light);
        }
        .compare-card .cc-item:last-child {
            border-bottom: none;
        }
        .cc-item .cc-label {
            color: var(--text-muted);
        }
        .cc-item .cc-value {
            color: var(--text-mid);
            font-weight: 600;
            text-align: right;
        }
        .cc-value.highlight {
            color: var(--accent-dark);
        }
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: box-shadow var(--transition-fast);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-xs);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 14px 18px;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-strong);
            user-select: none;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            color: var(--accent-dark);
            font-size: 0.9rem;
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            display: none;
            padding: 0 18px 16px;
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        /* CTA */
        .cta-panel {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 20px;
        }
        .cta-panel .cta-text {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 600;
            line-height: 1.6;
        }
        .cta-panel .cta-sub {
            color: rgba(255, 255, 255, 0.78);
            font-size: 0.9rem;
            margin-top: 4px;
        }
        .cta-panel .btn-accent-solid {
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 10px 22px;
            font-size: 0.95rem;
            font-weight: 700;
            cursor: pointer;
            transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }
        .cta-panel .btn-accent-solid:hover {
            background: var(--accent-dark);
            box-shadow: var(--shadow-md);
        }
        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 48px 24px 28px;
            border-top: 1px solid var(--border-light);
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.5fr 2fr;
            gap: 40px;
            padding-bottom: 28px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }
        .footer-brand .logo-link {
            color: #fff;
            font-size: 1.25rem;
            margin-bottom: 10px;
        }
        .footer-brand .logo-link:hover {
            color: #fff;
            opacity: 0.85;
        }
        .footer-brand .logo-mark {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .footer-desc {
            font-size: 0.88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 360px;
            margin-bottom: 0;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .footer-link-group h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .footer-link-group a {
            display: block;
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.87rem;
            padding: 3px 0;
            transition: color var(--transition-fast);
        }
        .footer-link-group a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px 18px;
            padding-top: 20px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-bottom p {
            margin: 0;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        .footer-divider {
            margin: 0 8px;
            color: rgba(255, 255, 255, 0.3);
        }
        /* Responsive */
        @media (max-width: 991px) {
            .docs-layout {
                flex-direction: column;
                padding: 16px;
            }
            .docs-sidebar {
                display: none;
            }
            .header-search {
                display: none;
            }
            .navbar-toggler {
                display: inline-flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 24px;
                gap: 2px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav .nav-link {
                width: 100%;
                padding: 10px 12px;
            }
            .header-inner {
                gap: 10px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-links {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cta-panel {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 767px) {
            .doc-grid {
                grid-template-columns: 1fr;
            }
            .version-strip {
                flex-direction: column;
                text-align: center;
            }
            .steps-list {
                grid-template-columns: 1fr;
            }
            .compare-grid {
                grid-template-columns: 1fr;
            }
            .page-head h1 {
                font-size: 1.6rem;
            }
            .section {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
        }
        @media (max-width: 520px) {
            .header-inner {
                padding: 0 14px;
            }
            .logo-link span:last-child {
                font-size: 1rem;
            }
            .cta-panel {
                padding: 24px 18px;
            }
            .doc-card .doc-body {
                padding: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1a3c34;
            --primary-dark: #0f2a24;
            --primary-mid: #245247;
            --primary-light: #3a6f62;
            --accent: #c5813a;
            --accent-dark: #a06828;
            --accent-light: #e0a458;
            --accent-pale: #f5e8d3;
            --bg: #f7f5f0;
            --bg-warm: #f0ede6;
            --card: #ffffff;
            --text: #1e2120;
            --text-strong: #161918;
            --text-mid: #3c4340;
            --text-light: #5a605d;
            --text-muted: #7d8480;
            --border: #ddd9d0;
            --border-light: #ece9e2;
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 20px;
            --shadow-xs: 0 1px 4px rgba(15, 42, 36, 0.05);
            --shadow-sm: 0 2px 12px rgba(15, 42, 36, 0.06);
            --shadow-md: 0 4px 18px rgba(15, 42, 36, 0.08);
            --shadow-lg: 0 8px 28px rgba(15, 42, 36, 0.12);
            --shadow-xl: 0 16px 48px rgba(15, 42, 36, 0.16);
            --font-family: system-ui, -apple-system, "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --sidebar-width: 260px;
            --header-height: 64px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            letter-spacing: 0.02em;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        a {
            color: var(--primary-mid);
            text-decoration: none;
            transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), opacity var(--transition-fast);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: var(--font-family);
            font-size: inherit;
            line-height: inherit;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(197, 129, 58, 0.45);
            outline-offset: 2px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            margin-top: 0;
            margin-bottom: 0.5rem;
            font-weight: 700;
            color: var(--text-strong);
            line-height: 1.4;
        }
        p {
            margin-top: 0;
            margin-bottom: 1rem;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .section-alt {
            background-color: var(--bg-warm);
        }
        .section-tight {
            padding-top: 36px;
            padding-bottom: 36px;
        }
        .section-header {
            margin-bottom: 28px;
        }
        .section-header .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-dark);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header .eyebrow::before {
            content: '';
            display: inline-block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .section-header h2 {
            margin-bottom: 6px;
            font-size: 1.6rem;
        }
        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            line-height: 1.85;
            max-width: 720px;
            margin: 0 auto;
        }
        .section-header.text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 8px rgba(15, 42, 36, 0.04);
            min-height: var(--header-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 0 24px;
            max-width: 1200px;
            margin: 0 auto;
            height: var(--header-height);
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.18rem;
            color: var(--primary);
            letter-spacing: 0.04em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
            flex-shrink: 0;
        }
        .logo-link:hover {
            color: var(--primary);
            opacity: 0.8;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-light);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2px;
            margin: 0 auto;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .main-nav::-webkit-scrollbar {
            display: none;
        }
        .main-nav .nav-link {
            padding: 8px 14px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-mid);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: color var(--transition-fast), background-color var(--transition-fast);
            letter-spacing: 0.02em;
        }
        .main-nav .nav-link:hover {
            color: var(--primary);
            background-color: var(--bg-warm);
        }
        .main-nav .nav-link.active {
            color: var(--primary);
            background-color: var(--accent-pale);
        }
        .header-tools {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-warm);
            border: 1px solid var(--border);
            border-radius: 22px;
            padding: 0 4px 0 14px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            min-width: 200px;
        }
        .header-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(197, 129, 58, 0.18);
        }
        .header-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.88rem;
            color: var(--text);
            width: 100%;
            padding: 8px 6px;
        }
        .header-search input::placeholder {
            color: var(--text-muted);
        }
        .header-search button {
            border: none;
            background: var(--primary);
            color: #fff;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 0.8rem;
            transition: background-color var(--transition-fast);
            flex-shrink: 0;
        }
        .header-search button:hover {
            background: var(--primary-dark);
        }
        .header-select {
            padding: 6px 10px;
            font-size: 0.82rem;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--card);
            color: var(--text-mid);
            cursor: pointer;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            white-space: nowrap;
        }
        .header-select:focus {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(197, 129, 58, 0.18);
            outline: none;
        }
        .navbar-toggler-custom {
            display: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--card);
            padding: 8px 12px;
            cursor: pointer;
            font-size: 1.1rem;
            color: var(--primary);
            transition: background-color var(--transition-fast);
        }
        .navbar-toggler-custom:hover {
            background: var(--bg-warm);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            padding: 14px 0;
            background: var(--bg-warm);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-bar .breadcrumb {
            margin: 0;
            padding: 0;
            list-style: none;
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-bar .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-bar .breadcrumb li + li::before {
            content: '/';
            color: var(--text-muted);
            font-size: 0.75rem;
        }
        .breadcrumb-bar .breadcrumb a {
            color: var(--text-light);
            text-decoration: none;
        }
        .breadcrumb-bar .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar .breadcrumb .current {
            color: var(--text-strong);
            font-weight: 600;
        }

        /* Page Layout */
        .page-layout {
            display: flex;
            gap: 32px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 32px 24px 0;
            align-items: flex-start;
        }
        .doc-sidebar {
            width: var(--sidebar-width);
            flex-shrink: 0;
            position: sticky;
            top: calc(var(--header-height) + 20px);
            max-height: calc(100vh - var(--header-height) - 40px);
            overflow-y: auto;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 20px 16px;
        }
        .doc-sidebar::-webkit-scrollbar {
            width: 5px;
        }
        .doc-sidebar::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 10px;
        }
        .doc-sidebar-title {
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: 12px;
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border-light);
        }
        .doc-sidebar-nav {
            list-style: none;
            margin: 0 0 20px;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .doc-sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 10px;
            font-size: 0.88rem;
            color: var(--text-light);
            border-radius: var(--radius-sm);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
        }
        .doc-sidebar-nav a:hover {
            color: var(--primary);
            background: var(--bg-warm);
        }
        .doc-sidebar-nav a.active-side {
            color: var(--primary);
            background: var(--accent-pale);
            border-left-color: var(--primary);
        }
        .doc-sidebar-nav a i {
            font-size: 0.8rem;
            width: 16px;
            text-align: center;
            color: var(--accent-dark);
        }
        .doc-sidebar-group {
            margin-bottom: 18px;
        }
        .doc-sidebar-group-label {
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: block;
        }
        .doc-sidebar-version {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-bottom: 16px;
        }
        .doc-sidebar-version a {
            font-size: 0.84rem;
            color: var(--text-light);
            padding: 4px 8px;
            border-radius: 4px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .doc-sidebar-version a:hover {
            color: var(--primary);
            background: var(--bg-warm);
        }
        .doc-sidebar-version a i {
            font-size: 0.7rem;
            color: var(--accent);
            width: 14px;
            text-align: center;
        }
        .doc-sidebar-footer-links {
            display: flex;
            flex-direction: column;
            gap: 4px;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .doc-sidebar-footer-links a {
            font-size: 0.84rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 8px;
            border-radius: 6px;
        }
        .doc-sidebar-footer-links a:hover {
            color: var(--primary);
            background: var(--bg-warm);
        }
        .doc-sidebar-footer-links a i {
            color: var(--accent-dark);
            font-size: 0.8rem;
            width: 16px;
            text-align: center;
        }

        .content-main {
            flex: 1;
            min-width: 0;
        }

        /* Page Head (分类页窄条抬头) */
        .page-head {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-mid) 55%, var(--primary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            color: #fff;
            margin-bottom: 28px;
            position: relative;
            overflow: hidden;
        }
        .page-head::after {
            content: '';
            position: absolute;
            right: -40px;
            top: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(197, 129, 58, 0.28);
        }
        .page-head h1 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 6px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.03em;
        }
        .page-head p {
            color: rgba(255, 255, 255, 0.82);
            margin-bottom: 0;
            font-size: 0.95rem;
            max-width: 600px;
            position: relative;
            z-index: 1;
            line-height: 1.8;
        }

        /* News List */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .news-card {
            display: flex;
            gap: 20px;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
        }
        .news-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--border);
        }
        .news-card-img {
            width: 240px;
            min-height: 170px;
            flex-shrink: 0;
            background: var(--bg-warm);
            position: relative;
            overflow: hidden;
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.04);
        }
        .news-card-body {
            flex: 1;
            padding: 18px 20px 16px 8px;
            display: flex;
            flex-direction: column;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
            flex-wrap: wrap;
        }
        .news-tag {
            display: inline-block;
            padding: 3px 10px;
            font-size: 0.72rem;
            font-weight: 600;
            border-radius: 20px;
            background: var(--accent-pale);
            color: var(--accent-dark);
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .news-tag.primary-tag {
            background: var(--primary);
            color: #fff;
        }
        .news-tag.alt-tag {
            background: var(--bg-warm);
            color: var(--text-mid);
        }
        .news-date {
            font-size: 0.82rem;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .news-card h3 {
            font-size: 1.12rem;
            margin-bottom: 6px;
            line-height: 1.5;
        }
        .news-card h3 a {
            color: var(--text-strong);
            transition: color var(--transition-fast);
        }
        .news-card h3 a:hover {
            color: var(--primary);
        }
        .news-card .news-summary {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.75;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-readmore {
            margin-top: auto;
            font-size: 0.82rem;
            color: var(--primary-mid);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .news-card .news-readmore:hover {
            color: var(--primary);
        }
        .news-card .news-readmore i {
            font-size: 0.72rem;
            transition: transform var(--transition-fast);
        }
        .news-card .news-readmore:hover i {
            transform: translateX(3px);
        }
        .news-list-footer {
            text-align: center;
            padding-top: 8px;
        }

        /* Buttons */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 22px;
            font-size: 0.92rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            cursor: pointer;
            transition: all var(--transition-base);
            text-align: center;
            letter-spacing: 0.02em;
        }
        .btn-custom-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-custom-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-custom-primary:focus-visible {
            outline: 3px solid rgba(26, 60, 52, 0.4);
            outline-offset: 2px;
        }
        .btn-custom-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-custom-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-custom-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-custom-outline:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .btn-custom-sm {
            padding: 7px 16px;
            font-size: 0.82rem;
        }
        .btn-custom:disabled,
        .btn-custom.disabled {
            background: #b5b5b5;
            border-color: #b5b5b5;
            color: #f0f0f0;
            cursor: not-allowed;
            box-shadow: none;
        }

        /* Version Updates */
        .version-update-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .version-update-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
        }
        .version-update-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--border);
        }
        .version-badge {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 4px 12px;
            font-size: 0.78rem;
            font-weight: 700;
            border-radius: 4px;
           background: var(--primary);
    color: #fff;
}
.version-badge.accent-badge {
    background: var(--accent);
    color: #fff;
}
.version-badge.outline-badge {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}
.version-update-content {
    flex: 1;
}
.version-update-content h4 {
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--text-strong);
    font-weight: 700;
}
.version-update-content p {
    font-size: 0.88rem;
    color: var(--text-light);
    margin-bottom: 0;
    line-height: 1.75;
}
.version-update-date {
    font-size: 0.78rem;
    color: var(--text-muted);
    white-space: nowrap;
    margin-top: 4px;
}

/* 展会排期 */
.expo-schedule-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 16px;
}
.schedule-card {
    background: var(--card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 16px;
    transition: box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.schedule-card:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--border);
}
.schedule-card .schedule-month {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--accent-dark);
    margin-bottom: 6px;
}
.schedule-card h4 {
    font-size: 0.98rem;
    margin-bottom: 4px;
    color: var(--text-strong);
}
.schedule-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 0;
}
.schedule-card .schedule-tag {
    display: inline-block;
    margin-top: 8px;
    padding: 2px 10px;
    font-size: 0.72rem;
    border-radius: 20px;
    background: var(--accent-pale);
    color: var(--accent-dark);
}

/* 分类入口 */
.category-entry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
}
.category-entry-item {
    background: var(--bg-warm);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    padding: 18px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: all var(--transition-base);
}
.category-entry-item:hover {
    background: var(--card);
    border-color: var(--border);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}
.category-entry-item i {
    font-size: 1.4rem;
    color: var(--primary-light);
    width: 32px;
    text-align: center;
}
.category-entry-item h5 {
    font-size: 0.96rem;
    margin-bottom: 2px;
    color: var(--text-strong);
}
.category-entry-item p {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 0;
    line-height: 1.5;
}

/* FAQ */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}
.faq-item {
    background: var(--card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    overflow: hidden;
}
.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 18px;
    cursor: pointer;
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--text-strong);
    transition: background-color var(--transition-fast);
}
.faq-question:hover {
    background-color: var(--bg-warm);
}
.faq-question i {
    color: var(--accent-dark);
    font-size: 1rem;
    transition: transform var(--transition-base);
}
.faq-item.open .faq-question i {
    transform: rotate(180deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow), padding var(--transition-slow);
    padding: 0 18px;
    font-size: 0.92rem;
    color: var(--text-light);
    line-height: 1.85;
    border-top: 0 solid var(--border-light);
}
.faq-item.open .faq-answer {
    max-height: 200px;
    padding: 14px 18px;
    border-top-width: 1px;
}

/* Footer */
.site-footer {
    background-color: var(--primary-dark);
    color: rgba(255, 255, 255, 0.78);
    margin-top: 40px;
}
.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 48px 24px 0;
}
.footer-top {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}
.footer-brand .logo-link {
    color: #fff;
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 14px;
}
.footer-brand .logo-link .logo-mark {
    background: rgba(255, 255, 255, 0.15);
    color: var(--accent-light);
}
.footer-desc {
    font-size: 0.88rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.68);
    max-width: 320px;
    margin-bottom: 0;
}
.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.footer-link-group h4 {
    color: #fff;
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 14px;
    letter-spacing: 0.04em;
}
.footer-link-group a {
    display: block;
    color: rgba(255, 255, 255, 0.68);
    font-size: 0.86rem;
    margin-bottom: 8px;
    transition: color var(--transition-fast);
}
.footer-link-group a:hover {
    color: var(--accent-light);
}
.footer-bottom {
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.55);
    text-align: center;
}
.footer-bottom p {
    margin-bottom: 0;
}
.footer-bottom a {
    color: rgba(255, 255, 255, 0.68);
    text-decoration: none;
}
.footer-bottom a:hover {
    color: var(--accent-light);
}
.footer-icp {
    font-size: 0.76rem;
    color: rgba(255, 255, 255, 0.5);
}
.footer-divider {
    margin: 0 6px;
    color: rgba(255, 255, 255, 0.3);
}

/* 移动端响应式 */
@media (max-width: 992px) {
    .header-inner {
        gap: 10px;
        padding: 0 16px;
        height: auto;
        min-height: var(--header-height);
    }
    .main-nav {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        padding: 8px 0 12px;
        overflow-x: auto;
    }
    .header-tools {
        order: 2;
        margin-left: auto;
    }
    .header-search {
        display: none;
    }
    .navbar-toggler-custom {
        display: inline-flex;
    }
    .page-layout {
        flex-direction: column;
        gap: 20px;
        padding: 20px 16px 0;
    }
    .doc-sidebar {
        width: 100%;
        position: static;
        max-height: none;
        margin-bottom: 12px;
    }
    .doc-sidebar-nav {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 4px;
        margin-bottom: 8px;
    }
    .doc-sidebar-nav a {
        padding: 6px 10px;
        border-left: none;
        border-bottom: 2px solid transparent;
        font-size: 0.82rem;
    }
    .doc-sidebar-nav a.active-side {
        border-bottom-color: var(--primary);
        background: var(--accent-pale);
    }
    .doc-sidebar-group {
        margin-bottom: 10px;
    }
    .footer-top {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    .section {
        padding-top: 40px;
        padding-bottom: 40px;
    }
    .news-card {
        flex-direction: column;
    }
    .news-card-img {
        width: 100%;
        min-height: 180px;
    }
    .news-card-body {
        padding: 16px 18px;
    }
    .news-card h3 {
        font-size: 1.02rem;
    }
    .page-head {
        padding: 22px 20px;
    }
    .page-head h1 {
        font-size: 1.6rem;
    }
    .version-update-item {
        flex-direction: column;
        gap: 10px;
    }
    .version-update-content {
        width: 100%;
    }
    .footer-links {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .footer-bottom {
        padding: 16px 0;
    }
}
@media (max-width: 576px) {
    .container-custom {
        padding-left: 16px;
        padding-right: 16px;
    }
    .header-inner {
        flex-wrap: wrap;
        padding: 8px 12px;
        height: auto;
    }
    .main-nav .nav-link {
        font-size: 0.82rem;
        padding: 6px 10px;
    }
    .header-tools .header-select {
        font-size: 0.72rem;
        padding: 4px 6px;
    }
    .logo-link {
        font-size: 1rem;
    }
    .logo-mark {
        width: 30px;
        height: 30px;
        font-size: 0.85rem;
    }
    .btn-custom {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    .news-card-img {
        min-height: 140px;
    }
    .news-card-body {
        padding: 14px 16px;
    }
}

/* roulang page: category3 */
:root {
            --primary: #1a3c34;
            --primary-dark: #0f2a24;
            --primary-mid: #245247;
            --primary-light: #3a6f62;
            --accent: #c5813a;
            --accent-dark: #a06828;
            --accent-light: #e0a458;
            --accent-pale: #f5e8d3;
            --bg: #f7f5f0;
            --bg-warm: #f0ede6;
            --card: #ffffff;
            --text: #1e2120;
            --text-strong: #161918;
            --text-mid: #3c4340;
            --text-light: #5a605d;
            --text-muted: #7d8480;
            --border: #ddd9d0;
            --border-light: #ece9e2;
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 20px;
            --shadow-xs: 0 1px 4px rgba(15, 42, 36, 0.05);
            --shadow-sm: 0 2px 12px rgba(15, 42, 36, 0.06);
            --shadow-md: 0 4px 18px rgba(15, 42, 36, 0.08);
            --shadow-lg: 0 8px 28px rgba(15, 42, 36, 0.12);
            --shadow-xl: 0 16px 48px rgba(15, 42, 36, 0.16);
            --font-family: system-ui, -apple-system, "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --sidebar-width: 260px;
            --header-height: 64px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            letter-spacing: 0.02em;
        }

        a {
            color: var(--primary-mid);
            text-decoration: none;
            transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
        }

        a:hover {
            color: var(--primary);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        select,
        textarea {
            font-family: var(--font-family);
            font-size: inherit;
            line-height: inherit;
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(197, 129, 58, 0.45);
            outline-offset: 2px;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding-top: 64px;
            padding-bottom: 64px;
        }

        .section-alt {
            background-color: var(--bg-warm);
        }

        .section-tight {
            padding-top: 40px;
            padding-bottom: 40px;
        }

        .section-header {
            margin-bottom: 32px;
        }

        .section-header .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-dark);
            text-transform: uppercase;
            margin-bottom: 10px;
        }

        .section-header .eyebrow::before {
            content: '';
            display: inline-block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .section-header h2 {
            margin-bottom: 6px;
            font-weight: 700;
            color: var(--text-strong);
            font-size: 1.7rem;
            line-height: 1.4;
        }

        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            line-height: 1.85;
            max-width: 720px;
            margin: 0;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 8px rgba(15, 42, 36, 0.04);
            min-height: var(--header-height);
        }

        .header-inner {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 0 24px;
            max-width: 1200px;
            margin: 0 auto;
            height: var(--header-height);
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--primary);
            letter-spacing: 0.04em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .logo-link:hover {
            color: var(--primary);
            opacity: 0.8;
        }

        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-light);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .main-nav::-webkit-scrollbar {
            display: none;
        }

        .main-nav .nav-link {
            font-size: 0.93rem;
            font-weight: 600;
            color: var(--text-mid);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
            background: var(--bg-warm);
        }

        .main-nav .nav-link.active {
            color: var(--primary);
            background: var(--accent-pale);
        }

        .main-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--accent);
        }

        .header-tools {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .header-search {
            position: relative;
            display: flex;
            align-items: center;
        }

        .header-search input {
            width: 180px;
            padding: 8px 12px 8px 34px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--bg);
            font-size: 0.88rem;
            color: var(--text);
            transition: all var(--transition-fast);
        }

        .header-search input:focus {
            outline: none;
            border-color: var(--primary-light);
            background: var(--card);
            box-shadow: 0 0 0 3px rgba(58, 111, 98, 0.12);
        }

        .header-search i {
            position: absolute;
            left: 11px;
            font-size: 0.88rem;
            color: var(--text-muted);
            pointer-events: none;
        }

        .header-select {
            padding: 8px 10px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--bg);
            font-size: 0.85rem;
            color: var(--text-mid);
            transition: all var(--transition-fast);
            cursor: pointer;
            min-width: 76px;
        }

        .header-select:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(58, 111, 98, 0.12);
        }

        .hamburger-btn {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 8px 12px;
            cursor: pointer;
            color: var(--text-mid);
            font-size: 1.1rem;
            transition: all var(--transition-fast);
        }

        .hamburger-btn:hover {
            background: var(--bg-warm);
            color: var(--primary);
        }

        /* Breadcrumb */
        .breadcrumb-section {
            padding: 18px 0;
            background: var(--bg-warm);
            border-bottom: 1px solid var(--border-light);
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 6px;
            list-style: none;
            padding: 0;
            margin: 0;
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        .breadcrumb-custom li {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .breadcrumb-custom li a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .breadcrumb-custom li a:hover {
            color: var(--primary);
        }

        .breadcrumb-custom li:not(:last-child)::after {
            content: '/';
            margin-left: 6px;
            color: var(--border);
        }

        .breadcrumb-custom li.current {
            color: var(--primary);
            font-weight: 600;
        }

        /* Content layout with sidebar */
        .content-layout {
            display: flex;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
            padding: 32px 24px 0;
            align-items: flex-start;
        }

        .sidebar {
            width: var(--sidebar-width);
            flex-shrink: 0;
            position: sticky;
            top: calc(var(--header-height) + 20px);
            max-height: calc(100vh - var(--header-height) - 40px);
            overflow-y: auto;
            padding-bottom: 24px;
        }

        .sidebar::-webkit-scrollbar {
            width: 4px;
        }

        .sidebar::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 2px;
        }

        .sidebar-block {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            box-shadow: var(--shadow-xs);
            padding: 18px 16px;
            margin-bottom: 16px;
        }

        .sidebar-block h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-mid);
            margin-bottom: 12px;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .sidebar-nav li a {
            display: block;
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--text-light);
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
        }

        .sidebar-nav li a:hover {
            background: var(--bg-warm);
            color: var(--primary);
        }

        .sidebar-nav li a.active-link {
            background: var(--accent-pale);
            color: var(--primary);
            border-left-color: var(--accent);
            font-weight: 600;
        }

        .sidebar-select {
            width: 100%;
            padding: 8px 10px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--bg);
            font-size: 0.85rem;
            color: var(--text-mid);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .sidebar-select:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(58, 111, 98, 0.12);
        }

        .sidebar-download-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 12px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 0.88rem;
            font-weight: 600;
            transition: all var(--transition-fast);
        }

        .sidebar-download-link:hover {
            background: var(--primary-dark);
            color: #fff;
        }

        .main-content {
            flex: 1;
            min-width: 0;
            padding-bottom: 64px;
        }

        /* Page header (narrow strip, not full hero) */
        .page-head-strip {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            margin-bottom: 32px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .page-head-strip::after {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(197, 129, 58, 0.18);
            pointer-events: none;
        }

        .page-head-strip h1 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 10px;
            line-height: 1.35;
            position: relative;
            z-index: 1;
        }

        .page-head-strip .page-head-desc {
            font-size: 0.98rem;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.85;
            max-width: 680px;
            margin-bottom: 0;
            position: relative;
            z-index: 1;
        }

        .page-head-strip .page-head-meta {
            display: flex;
            gap: 16px;
            margin-top: 14px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.7);
            position: relative;
            z-index: 1;
        }

        .page-head-strip .page-head-meta i {
            margin-right: 4px;
            color: var(--accent-light);
        }

        /* Solution cards */
        .solution-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .solution-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            gap: 0;
        }

        .solution-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            border-color: var(--border);
        }

        .solution-card .card-img {
            width: 220px;
            flex-shrink: 0;
            background: var(--bg-warm);
            min-height: 160px;
            overflow: hidden;
        }

        .solution-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .solution-card .card-body {
            padding: 20px 24px;
            flex: 1;
            min-width: 0;
        }

        .solution-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-strong);
            margin-bottom: 6px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

        .solution-card:hover .card-body h3 {
            color: var(--primary);
        }

        .solution-card .card-desc {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .solution-card .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .solution-card .card-meta .badge-tag {
            background: var(--accent-pale);
            color: var(--accent-dark);
            padding: 3px 10px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.75rem;
        }

        .solution-card .card-meta .date-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Scenario tags */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: 999px;
            font-size: 0.88rem;
            color: var(--text-mid);
            transition: all var(--transition-fast);
            cursor: default;
        }

        .tag-pill:hover {
            border-color: var(--accent);
            color: var(--primary);
            background: var(--accent-pale);
        }

        .tag-pill i {
            color: var(--accent);
            font-size: 0.8rem;
        }

        /* Compare block */
        .compare-strip {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 24px;
        }

        .compare-strip .compare-row {
            display: flex;
            align-items: center;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-light);
            gap: 16px;
        }

        .compare-strip .compare-row:last-child {
            border-bottom: none;
        }

        .compare-strip .compare-label {
            width: 160px;
            font-weight: 600;
            color: var(--text-mid);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .compare-strip .compare-values {
            display: flex;
            gap: 16px;
            flex: 1;
            flex-wrap: wrap;
        }

        .compare-strip .compare-pill {
            background: var(--bg-warm);
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.85rem;
            color: var(--text-mid);
            text-align: center;
            flex: 1;
            min-width: 100px;
        }

        .compare-strip .compare-pill.highlight {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }

        .compare-strip .compare-pill.accent {
            background: var(--accent-pale);
            color: var(--accent-dark);
        }

        /* Category entrance */
        .category-entrance {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 14px;
        }

        .category-entry-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 16px 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-mid);
            transition: all var(--transition-fast);
        }

        .category-entry-card:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .category-entry-card i {
            color: var(--accent);
            font-size: 1rem;
            flex-shrink: 0;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border);
        }

        .faq-question {
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-strong);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: all var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--primary);
        }

        .faq-question i {
            color: var(--accent);
            font-size: 1rem;
            flex-shrink: 0;
            transition: transform var(--transition-fast);
        }

        .faq-item.open .faq-question i {
            transform: rotate(90deg);
        }

        .faq-answer {
            padding: 0 20px 18px 48px;
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.8;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* Form */
        .booking-form-wrap {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 32px 28px;
        }

        .booking-form-wrap .form-label {
            font-weight: 600;
            color: var(--text-mid);
            font-size: 0.9rem;
            margin-bottom: 6px;
        }

        .booking-form-wrap .form-control {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.92rem;
            color: var(--text);
            background: var(--bg);
            transition: all var(--transition-fast);
        }

        .booking-form-wrap .form-control:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(58, 111, 98, 0.12);
            background: var(--card);
        }

        .booking-form-wrap .form-select {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.92rem;
            color: var(--text);
            background: var(--bg);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .booking-form-wrap .form-select:focus {
            outline: none;
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(58, 111, 98, 0.12);
            background: var(--card);
        }

        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-sm);
            padding: 11px 24px;
            font-size: 0.95rem;
            font-weight: 700;
            transition: all var(--transition-fast);
            cursor: pointer;
            letter-spacing: 0.04em;
        }

        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .btn-primary-custom:focus-visible {
            outline: 3px solid rgba(197, 129, 58, 0.5);
            outline-offset: 2px;
        }

        .btn-outline-custom {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary-light);
            border-radius: var(--radius-sm);
            padding: 10px 22px;
            font-size: 0.92rem;
            font-weight: 600;
            transition: all var(--transition-fast);
            cursor: pointer;
            letter-spacing: 0.03em;
        }

        .btn-outline-custom:hover {
            background: var(--bg-warm);
            border-color: var(--primary);
            color: var(--primary-dark);
        }

        .form-note {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-top: 10px;
        }

        .form-note i {
            color: var(--accent);
            margin-right: 4px;
        }

        /* Help block */
        .help-panel {
            background: var(--bg-warm);
            border: 1px dashed var(--border);
            border-radius: var(--radius);
            padding: 24px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
        }

        .help-panel .help-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-light);
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .help-panel .help-content h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-strong);
        }

        .help-panel .help-content p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            margin-top: 32px;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 48px 24px 24px;
        }

        .footer-top {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .footer-brand .logo-link {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 12px;
        }

        .footer-brand .logo-mark {
            background: var(--accent);
            color: var(--primary-dark);
        }

        .footer-desc {
            font-size: 0.88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 320px;
            margin-bottom: 0;
        }

        .footer-links {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }

        .footer-link-group h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .footer-link-group a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }

        .footer-link-group a:hover {
            color: var(--accent-light);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
        }

        .footer-bottom p {
            margin: 0;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
            transition: color var(--transition-fast);
        }

        .footer-bottom a:hover {
            color: var(--accent-light);
        }

        .footer-divider {
            margin: 0 8px;
            color: rgba(255, 255, 255, 0.3);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .content-layout {
                flex-direction: column;
                gap: 24px;
                padding: 24px 16px 0;
            }

            .sidebar {
                display: none;
                width: 100%;
                position: static;
                max-height: none;
                overflow-y: visible;
            }

            .sidebar.mobile-show {
                display: block;
            }

            .hamburger-btn {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .main-nav {
                display: none;
                flex-direction: column;
                gap: 2px;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--card);
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                padding: 12px 16px;
                z-index: 1050;
                overflow-y: auto;
                max-height: 400px;
            }

            .main-nav.mobile-show {
                display: flex;
            }

            .main-nav .nav-link {
                padding: 10px 14px;
                width: 100%;
            }

            .header-search {
                display: none;
            }

            .header-search.mobile-show {
                display: flex;
                width: 100%;
                order: 10;
            }

            .header-search.mobile-show input {
                width: 100%;
            }

            .header-tools {
                margin-left: auto;
            }

            .solution-card {
                flex-direction: column;
            }

            .solution-card .card-img {
                width: 100%;
                min-height: 160px;
                height: 180px;
            }

            .compare-strip .compare-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .compare-strip .compare-label {
                width: auto;
            }

            .compare-strip .compare-values {
                width: 100%;
            }
        }

        @media (max-width: 768px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section {
                padding-top: 40px;
                padding-bottom: 40px;
            }

            .page-head-strip {
                padding: 24px 20px;
            }

            .page-head-strip h1 {
                font-size: 1.5rem;
            }

            .page-head-strip .page-head-desc {
                font-size: 0.88rem;
            }

            .footer-top {
                flex-direction: column;
                gap: 28px;
            }

            .footer-links {
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }

            .header-inner {
                padding: 0 12px;
                gap: 10px;
            }

            .logo-link {
                font-size: 1rem;
            }

            .logo-mark {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }

            .solution-card .card-body {
                padding: 16px 18px;
            }

            .solution-card .card-body h3 {
                font-size: 1rem;
            }

            .category-entrance {
                grid-template-columns: 1fr 1fr;
            }

            .booking-form-wrap {
                padding: 20px 16px;
            }
        }

        @media (max-width: 576px) {
            .category-entrance {
                grid-template-columns: 1fr;
            }

            .tag-pill {
                font-size: 0.82rem;
                padding: 6px 12px;
            }

            .page-head-strip h1 {
                font-size: 1.3rem;
            }

            .compare-strip {
                padding: 16px;
            }

            .compare-strip .compare-pill {
                min-width: 80px;
                font-size: 0.78rem;
                padding: 4px 10px;
            }

            .btn-primary-custom,
            .btn-outline-custom {
                width: 100%;
                text-align: center;
            }

            .footer-container {
                padding: 32px 16px 16px;
            }
        }

/* roulang page: category4 */
:root {
 --primary: #1a3c34;
 --primary-dark: #0f2a24;
 --primary-mid: #245247;
 --primary-light: #3a6f62;
 --accent: #c5813a;
 --accent-dark: #a06828;
 --accent-light: #e0a458;
 --accent-pale: #f5e8d3;
 --bg: #f7f5f0;
 --bg-warm: #f0ede6;
 --card: #ffffff;
 --text: #1e2120;
 --text-strong: #161918;
 --text-mid: #3c4340;
 --text-light: #5a605d;
 --text-muted: #7d8480;
 --border: #ddd9d0;
 --border-light: #ece9e2;
 --radius-sm: 8px;
 --radius: 16px;
 --radius-lg: 20px;
 --shadow-xs: 0 1px 4px rgba(15, 42, 36, 0.05);
 --shadow-sm: 0 2px 12px rgba(15, 42, 36, 0.06);
 --shadow-md: 0 4px 18px rgba(15, 42, 36, 0.08);
 --shadow-lg: 0 8px 28px rgba(15, 42, 36, 0.12);
 --shadow-xl: 0 16px 48px rgba(15, 42, 36, 0.16);
 --font-family: system-ui, -apple-system, "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;
 --transition-fast: 0.15s ease;
 --transition-base: 0.25s ease;
 --transition-slow: 0.35s ease;
 --sidebar-width: 260px;
 --header-height: 64px;
}

html {
 scroll-behavior: smooth;
 -webkit-text-size-adjust: 100%;
}

body {
 font-family: var(--font-family);
 font-size: 1rem;
 line-height: 1.9;
 color: var(--text);
 background-color: var(--bg);
 margin: 0;
 min-height: 100vh;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 letter-spacing: 0.02em;
}

a {
 color: var(--primary-mid);
 text-decoration: none;
 transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

a:hover {
 color: var(--primary);
}

img {
 max-width: 100%;
 height: auto;
 display: block;
}

button, input, select, textarea {
 font-family: var(--font-family);
 font-size: inherit;
 line-height: inherit;
}

button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
 outline: 3px solid rgba(197, 129, 58, 0.45);
 outline-offset: 2px;
}

h1, h2, h3, h4, h5, h6 {
 color: var(--text-strong);
 font-weight: 700;
 line-height: 1.4;
 margin-top: 0;
 margin-bottom: 0.75rem;
}

h1 {
 font-size: 2.3rem;
 letter-spacing: 0.03em;
}

h2 {
 font-size: 1.6rem;
 letter-spacing: 0.02em;
}

h3 {
 font-size: 1.2rem;
 letter-spacing: 0.01em;
}

p {
 margin-top: 0;
 margin-bottom: 1.2em;
}

.container-custom {
 max-width: 1200px;
 margin: 0 auto;
 padding-left: 24px;
 padding-right: 24px;
}

.section {
 padding-top: 64px;
 padding-bottom: 64px;
}

.section-alt {
 background-color: var(--bg-warm);
}

.section-tight {
 padding-top: 40px;
 padding-bottom: 40px;
}

.section-header {
 margin-bottom: 32px;
}

.section-header .eyebrow {
 display: inline-flex;
 align-items: center;
 gap: 8px;
 font-size: 0.82rem;
 font-weight: 600;
 letter-spacing: 0.08em;
 color: var(--accent-dark);
 margin-bottom: 10px;
}

.section-header .eyebrow::before {
 content: '';
 display: inline-block;
 width: 24px;
 height: 2px;
 background: var(--accent);
 border-radius: 2px;
}

.section-header h2 {
 margin-bottom: 6px;
}

.section-header .section-desc {
 font-size: 0.98rem;
 color: var(--text-light);
 line-height: 1.85;
 max-width: 720px;
 margin: 0 auto;
}

/* Header / Nav */
.site-header {
 position: sticky;
 top: 0;
 z-index: 1040;
 background: rgba(255, 255, 255, 0.96);
 backdrop-filter: blur(12px);
 -webkit-backdrop-filter: blur(12px);
 border-bottom: 1px solid var(--border-light);
 box-shadow: 0 1px 8px rgba(15, 42, 36, 0.04);
 min-height: var(--header-height);
}

.header-inner {
 display: flex;
 align-items: center;
 gap: 16px;
 padding: 0 24px;
 max-width: 1200px;
 margin: 0 auto;
 height: var(--header-height);
}

.logo-link {
 display: flex;
 align-items: center;
 gap: 10px;
 font-weight: 800;
 font-size: 1.2rem;
 color: var(--primary);
 letter-spacing: 0.04em;
 white-space: nowrap;
 transition: opacity var(--transition-fast);
}

.logo-link:hover {
 color: var(--primary);
 opacity: 0.8;
}

.logo-mark {
 width: 36px;
 height: 36px;
 border-radius: 10px;
 background: var(--primary);
 display: flex;
 align-items: center;
 justify-content: center;
 color: var(--accent-light);
 font-size: 1rem;
 flex-shrink: 0;
}

.main-nav {
 display: flex;
 align-items: center;
 gap: 4px;
 margin: 0 auto;
 flex-wrap: nowrap;
 overflow-x: auto;
 scrollbar-width: none;
 -ms-overflow-style: none;
}

.main-nav::-webkit-scrollbar {
 display: none;
}

.main-nav .nav-link {
 display: inline-flex;
 align-items: center;
 padding: 8px 14px;
 font-size: 0.92rem;
 font-weight: 500;
 color: var(--text-mid);
 border-radius: 8px;
 white-space: nowrap;
 transition: color var(--transition-fast), background-color var(--transition-fast);
}

.main-nav .nav-link:hover {
 color: var(--primary);
 background-color: rgba(26, 60, 52, 0.05);
}

.main-nav .nav-link.active {
 color: var(--primary);
 background-color: rgba(26, 60, 52, 0.09);
 font-weight: 700;
}

.header-actions {
 display: flex;
 align-items: center;
 gap: 10px;
 flex-shrink: 0;
}

.header-search {
 display: flex;
 align-items: center;
 gap: 6px;
 background: var(--bg-warm);
 border: 1px solid var(--border);
 border-radius: 10px;
 padding: 6px 12px;
 min-width: 200px;
 transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.header-search:focus-within {
 border-color: var(--accent);
 box-shadow: 0 0 0 3px rgba(197, 129, 58, 0.18);
}

.header-search input {
 border: none;
 background: transparent;
 outline: none;
 font-size: 0.88rem;
 color: var(--text);
 width: 100%;
}

.header-search input::placeholder {
 color: var(--text-muted);
}

.header-search .search-icon {
 color: var(--text-muted);
 font-size: 0.9rem;
}

.header-version-select, .header-lang-btn {
 background: transparent;
 border: 1px solid var(--border);
 border-radius: 8px;
 padding: 6px 10px;
 font-size: 0.85rem;
 color: var(--text-mid);
 cursor: pointer;
 transition: border-color var(--transition-fast), color var(--transition-fast);
}

.header-version-select:hover, .header-lang-btn:hover {
 border-color: var(--accent);
 color: var(--primary);
}

.mobile-toggle {
 display: none;
 background: transparent;
 border: 1px solid var(--border);
 border-radius: 8px;
 padding: 8px 12px;
 font-size: 1.1rem;
 color: var(--text-mid);
 cursor: pointer;
}

/* Breadcrumb */
.breadcrumb-wrap {
 background: transparent;
 padding: 16px 24px 0;
 max-width: 1200px;
 margin: 0 auto;
}

.breadcrumb-nav {
 display: flex;
 align-items: center;
 flex-wrap: wrap;
 gap: 6px;
 font-size: 0.88rem;
 color: var(--text-muted);
 list-style: none;
 padding: 0;
 margin: 0;
}

.breadcrumb-nav li {
 display: inline-flex;
 align-items: center;
 gap: 6px;
}

.breadcrumb-nav li:not(:last-child)::after {
 content: '/';
 color: var(--text-muted);
 margin-left: 4px;
}

.breadcrumb-nav a {
 color: var(--text-light);
}

.breadcrumb-nav a:hover {
 color: var(--primary);
}

.breadcrumb-nav .breadcrumb-current {
 color: var(--primary);
 font-weight: 600;
}

/* Doc layout */
.doc-layout {
 display: flex;
 gap: 28px;
 max-width: 1200px;
 margin: 0 auto;
 padding: 24px 24px 0;
 align-items: flex-start;
}

.doc-sidebar {
 width: var(--sidebar-width);
 flex-shrink: 0;
 position: sticky;
 top: calc(var(--header-height) + 20px);
 max-height: calc(100vh - var(--header-height) - 40px);
 overflow-y: auto;
 background: var(--card);
 border: 1px solid var(--border-light);
 border-radius: var(--radius);
 padding: 18px;
 box-shadow: var(--shadow-xs);
}

.doc-sidebar-title {
 font-size: 0.85rem;
 font-weight: 700;
 color: var(--text-muted);
 letter-spacing: 0.05em;
 margin-bottom: 12px;
 text-transform: uppercase;
}

.doc-sidebar-nav {
 list-style: none;
 padding: 0;
 margin: 0;
 display: flex;
 flex-direction: column;
 gap: 2px;
}

.doc-sidebar-nav li a {
 display: flex;
 align-items: center;
 gap: 8px;
 padding: 9px 12px;
 font-size: 0.9rem;
 color: var(--text-mid);
 border-radius: var(--radius-sm);
 border-left: 3px solid transparent;
 transition: all var(--transition-fast);
}

.doc-sidebar-nav li a:hover {
 background: var(--bg-warm);
 color: var(--primary);
}

.doc-sidebar-nav li a.active {
 background: rgba(26, 60, 52, 0.06);
 border-left-color: var(--primary);
 color: var(--primary);
 font-weight: 600;
}

.doc-sidebar-version {
 margin-top: 16px;
 padding-top: 14px;
 border-top: 1px solid var(--border-light);
}

.doc-sidebar-version label {
 font-size: 0.82rem;
 color: var(--text-muted);
 display: block;
 margin-bottom: 6px;
}

.doc-sidebar-version select {
 width: 100%;
 padding: 8px 10px;
 border: 1px solid var(--border);
 border-radius: var(--radius-sm);
 background: var(--bg);
 color: var(--text);
 font-size: 0.85rem;
 cursor: pointer;
}

.doc-sidebar-version select:focus {
 border-color: var(--accent);
 outline: none;
 box-shadow: 0 0 0 3px rgba(197, 129, 58, 0.15);
}

.doc-main {
 flex: 1;
 min-width: 0;
 padding-bottom: 48px;
}

/* Page heading */
.page-heading {
 background: var(--card);
 border: 1px solid var(--border-light);
 border-radius: var(--radius);
 padding: 32px 28px;
 margin-bottom: 28px;
 box-shadow: var(--shadow-xs);
 position: relative;
 overflow: hidden;
}

.page-heading::before {
 content: '';
 position: absolute;
 top: 0;
 left: 0;
 width: 4px;
 height: 100%;
 background: linear-gradient(180deg, var(--primary) 0%, var(--accent) 100%);
 border-radius: 4px 0 0 4px;
}

.page-heading h1 {
 font-size: 1.9rem;
 margin-bottom: 0.6rem;
}

.page-heading .page-desc {
 font-size: 0.98rem;
 color: var(--text-light);
 line-height: 1.85;
 max-width: 800px;
 margin-bottom: 0;
}

.page-heading .page-tags {
 display: flex;
 flex-wrap: wrap;
 gap: 8px;
 margin-top: 14px;
}

.page-heading .page-tags .tag-badge {
 display: inline-flex;
 align-items: center;
 gap: 4px;
 padding: 4px 12px;
 font-size: 0.8rem;
 font-weight: 500;
 border-radius: 20px;
 background: var(--accent-pale);
 color: var(--accent-dark);
}

/* Exhibitor list */
.exhibitor-list-section {
 margin-bottom: 28px;
}

.exhibitor-list-section .list-header {
 display: flex;
 align-items: center;
 justify-content: space-between;
 flex-wrap: wrap;
 gap: 12px;
 margin-bottom: 20px;
}

.exhibitor-list-section .list-header h2 {
 font-size: 1.4rem;
 margin-bottom: 0;
}

.exhibitor-list-section .list-header .exhibitor-count {
 font-size: 0.85rem;
 color: var(--text-muted);
}

.exhibitor-card-grid {
 display: grid;
 grid-template-columns: 1fr 1fr;
 gap: 20px;
}

.exhibitor-card {
 background: var(--card);
 border: 1px solid var(--border-light);
 border-radius: var(--radius);
 overflow: hidden;
 box-shadow: var(--shadow-sm);
 transition: transform var(--transition-base), box-shadow var(--transition-base);
 display: flex;
 flex-direction: column;
}

.exhibitor-card:hover {
 transform: translateY(-3px);
 box-shadow: var(--shadow-lg);
}

.exhibitor-card .card-img {
 position: relative;
 height: 190px;
 overflow: hidden;
 background: var(--bg-warm);
}

.exhibitor-card .card-img img {
 width: 100%;
 height: 100%;
 object-fit: cover;
 transition: transform var(--transition-slow);
}

.exhibitor-card:hover .card-img img {
 transform: scale(1.04);
}

.exhibitor-card .card-img::after {
 content: '';
 position: absolute;
 inset: 0;
 background: linear-gradient(180deg, transparent 50%, rgba(15, 42, 36, 0.55) 100%);
 pointer-events: none;
}

.exhibitor-card .card-booth-tag {
 position: absolute;
 top: 12px;
 left: 12px;
 z-index: 2;
 padding: 4px 12px;
 font-size: 0.78rem;
 font-weight: 600;
 border-radius: 6px;
 background: rgba(255, 255, 255, 0.92);
 color: var(--primary);
 letter-spacing: 0.03em;
}

.exhibitor-card .card-body {
 padding: 18px 18px 16px;
 flex: 1;
 display: flex;
 flex-direction: column;
}

.exhibitor-card .card-body h3 {
 font-size: 1.05rem;
 margin-bottom: 6px;
 line-height: 1.45;
}

.exhibitor-card .card-body .card-summary {
 font-size: 0.9rem;
 color: var(--text-light);
 line-height: 1.75;
 margin-bottom: 12px;
 flex: 1;
 display: -webkit-box;
 -webkit-line-clamp: 2;
 -webkit-box-orient: vertical;
 overflow: hidden;
}

.exhibitor-card .card-meta {
 display: flex;
 align-items: center;
 gap: 10px;
 flex-wrap: wrap;
 font-size: 0.8rem;
 color: var(--text-muted);
}

.exhibitor-card .card-meta .meta-tag {
 display: inline-flex;
 align-items: center;
 gap: 4px;
 padding: 3px 10px;
 border-radius: 4px;
 background: var(--bg-warm);
 border: 1px solid var(--border-light);
}

.exhibitor-card .card-meta .meta-tag i {
 font-size: 0.75rem;
 color: var(--accent);
}

.btn-view-more {
 display: inline-flex;
 align-items: center;
 gap: 8px;
 margin-top: 22px;
 padding: 10px 22px;
 font-size: 0.92rem;
 font-weight: 600;
 color: var(--primary);
 background: transparent;
 border: 1.5px solid var(--primary);
 border-radius: 10px;
 transition: all var(--transition-base);
}

.btn-view-more:hover {
 background: var(--primary);
 color: #fff;
}

.btn-view-more i {
 transition: transform var(--transition-base);
}

.btn-view-more:hover i {
 transform: translateX(4px);
}

/* Compare section */
.compare-section {
 margin-bottom: 28px;
}

.compare-section .compare-header {
 margin-bottom: 18px;
}

.compare-section .compare-header h2 {
 font-size: 1.4rem;
}

.compare-bars {
 display: flex;
 flex-direction: column;
 gap: 14px;
}

.compare-item {
 background: var(--card);
 border: 1px solid var(--border-light);
 border-radius: var(--radius-sm);
 padding: 16px 18px;
 display: grid;
 grid-template-columns: 160px 1fr 100px;
 gap: 16px;
 align-items: center;
 box-shadow: var(--shadow-xs);
 transition: box-shadow var(--transition-base);
}

.compare-item:hover {
 box-shadow: var(--shadow-md);
}

.compare-item .compare-name {
 font-weight: 600;
 font-size: 0.92rem;
 color: var(--text);
}

.compare-item .compare-bar-wrap {
 display: flex;
 align-items: center;
 gap: 12px;
}

.compare-item .compare-bar {
 flex: 1;
 height: 10px;
 background: var(--bg-warm);
 border-radius: 5px;
 overflow: hidden;
}

.compare-item .compare-bar-inner {
 height: 100%;
 border-radius: 5px;
 background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
}

.compare-item .compare-score {
 font-size: 0.85rem;
 font-weight: 700;
 color: var(--accent-dark);
 text-align: right;
}

/* Filter guide */
.filter-guide-section {
 margin-bottom: 28px;
 background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
 border-radius: var(--radius);
 padding: 28px 24px;
 color: #fff;
}

.filter-guide-section h2 {
 color: #fff;
 font-size: 1.35rem;
 margin-bottom: 10px;
}

.filter-guide-section p {
 color: rgba(255, 255, 255, 0.82);
 font-size: 0.92rem;
 line-height: 1.8;
 margin-bottom: 0;
}

.filter-guide-section .guide-steps {
 display: flex;
 flex-wrap: wrap;
 gap: 18px;
 margin-top: 16px;
}

.filter-guide-section .guide-step {
 display: flex;
 align-items: center;
 gap: 8px;
 font-size: 0.85rem;
 color: var(--accent-light);
}

.filter-guide-section .guide-step .step-num {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 width: 26px;
 height: 26px;
 border-radius: 50%;
 background: var(--accent);
 color: #fff;
 font-weight: 700;
 font-size: 0.78rem;
 flex-shrink: 0;
}

/* Category entry */
.category-entry-section {
 margin-bottom: 28px;
}

.category-entry-section h2 {
 font-size: 1.4rem;
 margin-bottom: 18px;
}

.category-entry-grid {
 display: grid;
 grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
 gap: 14px;
}

.category-entry-item {
 background: var(--card);
 border: 1px solid var(--border-light);
 border-radius: var(--radius-sm);
 padding: 16px 18px;
 display: flex;
 align-items: center;
 gap: 10px;
 font-weight: 600;
 font-size: 0.92rem;
 color: var(--text-mid);
 box-shadow: var(--shadow-xs);
 transition: all var(--transition-base);
}

.category-entry-item:hover {
 border-color: var(--accent);
 color: var(--primary);
 box-shadow: var(--shadow-sm);
}

.category-entry-item i {
 color: var(--accent);
 font-size: 0.95rem;
}

/* FAQ section */
.faq-section {
 margin-bottom: 28px;
}

.faq-section h2 {
 font-size: 1.4rem;
 margin-bottom: 18px;
}

.faq-list {
 display: flex;
 flex-direction: column;
 gap: 12px;
}

.faq-item {
 background: var(--card);
 border: 1px solid var(--border-light);
 border-radius: var(--radius-sm);
 overflow: hidden;
 box-shadow: var(--shadow-xs);
}

.faq-item .faq-question {
 width: 100%;
 background: transparent;
 border: none;
 padding: 16px 20px;
 display: flex;
 align-items: center;
 justify-content: space-between;
 gap: 12px;
 font-weight: 600;
 font-size: 0.95rem;
 color: var(--text-strong);
 cursor: pointer;
 text-align: left;
 transition: background-color var(--transition-fast);
}

.faq-item .faq-question:hover {
 background: var(--bg-warm);
}

.faq-item .faq-question .faq-icon {
 flex-shrink: 0;
 color: var(--accent);
 transition: transform var(--transition-base);
}

.faq-item .faq-question[aria-expanded="true"] .faq-icon {
 transform: rotate(45deg);
}

.faq-item .faq-answer {
 padding: 0 20px 16px;
 font-size: 0.9rem;
 color: var(--text-light);
 line-height: 1.8;
}

/* Support section */
.support-section {
 margin-bottom: 28px;
 background: var(--bg-warm);
 border-radius: var(--radius);
 padding: 26px 24px;
 border: 1px solid var(--border-light);
}

.support-section h2 {
 font-size: 1.35rem;
 margin-bottom: 12px;
}

.support-section p {
 font-size: 0.92rem;
 color: var(--text-light);
 line-height: 1.8;
 margin-bottom: 0;
}

.support-section .support-actions {
 display: flex;
 flex-wrap: wrap;
 gap: 12px;
 margin-top: 16px;
}

.btn-outline-accent {
 display: inline-flex;
 align-items: center;
 gap: 8px;
 padding: 10px 20px;
 font-size: 0.9rem;
 font-weight: 600;
 color: var(--accent-dark);
 background: transparent;
 border: 1.5px solid var(--accent);
 border-radius: 10px;
 transition: all var(--transition-base);
}

.btn-outline-accent:hover {
 background: var(--accent);
 color: #fff;
}

/* Footer */
.site-footer {
 background: var(--primary-dark);
 color: rgba(255, 255, 255, 0.78);
 margin-top: 48px;
 border-top: 3px solid var(--accent);
}

.footer-container {
 max-width: 1200px;
 margin: 0 auto;
 padding: 48px 24px 24px;
}

.footer-top {
 display: flex;
 flex-wrap: wrap;
 gap: 32px;
 justify-content: space-between;
 margin-bottom: 32px;
}

.footer-brand {
 max-width: 320px;
}

.footer-brand .logo-link {
 color: #fff;
 margin-bottom: 12px;
}

.footer-brand .logo-mark {
 background: var(--accent);
 color: var(--primary-dark);
}

.footer-brand .footer-desc {
 font-size: 0.88rem;
 line-height: 1.8;
 color: rgba(255, 255, 255, 0.68);
 margin-bottom: 0;
}

.footer-links {
 display: flex;
 flex-wrap: wrap;
 gap: 40px;
}

.footer-link-group h4 {
 color: #fff;
 font-size: 0.9rem;
 font-weight: 700;
 margin-bottom: 12px;
 letter-spacing: 0.03em;
}

.footer-link-group a {
 display: block;
 font-size: 0.87rem;
 color: rgba(255, 255, 255, 0.65);
 margin-bottom: 8px;
 transition: color var(--transition-fast);
}

.footer-link-group a:hover {
 color: var(--accent-light);
}

.footer-bottom {
 display: flex;
 flex-wrap: wrap;
 align-items: center;
 gap: 16px;
 padding-top: 20px;
 border-top: 1px solid rgba(255, 255, 255, 0.12);
 font-size: 0.82rem;
 color: rgba(255, 255, 255, 0.55);
}

.footer-bottom p {
 margin-bottom: 0;
}

.footer-bottom a {
 color: rgba(255, 255, 255, 0.65);
}

.footer-bottom a:hover {
 color: var(--accent-light);
}

.footer-divider {
 margin: 0 8px;
 color: rgba(255, 255, 255, 0.3);
}

.footer-icp {
 font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 992px) {
 .doc-sidebar {
  display: none;
 }
 .doc-layout {
  flex-direction: column;
 }
 .header-search {
  display: none;
 }
 .main-nav {
  margin-left: 0;
 }
 .header-actions {
  margin-left: auto;
 }
 .mobile-toggle {
  display: inline-flex;
 }
 .main-nav {
  display: none;
 }
 .main-nav.mobile-open {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background: #fff;
  border-bottom: 1px solid var(--border-light);
  padding: 12px 24px;
  box-shadow: var(--shadow-md);
  gap: 2px;
  align-items: stretch;
 }
 .main-nav.mobile-open .nav-link {
  padding: 12px 16px;
  border-radius: 8px;
 }
 h1 {
  font-size: 1.8rem;
 }
 .page-heading h1 {
  font-size: 1.6rem;
 }
 .exhibitor-card-grid {
  grid-template-columns: 1fr;
 }
 .compare-item {
  grid-template-columns: 120px 1fr;
 }
 .compare-item .compare-score {
  display: none;
 }
}

@media (max-width: 768px) {
 .container-custom, .header-inner, .doc-layout, .breadcrumb-wrap, .footer-container {
  padding-left: 16px;
  padding-right: 16px;
 }
 .section {
  padding-top: 40px;
  padding-bottom: 40px;
 }
 h1 {
  font-size: 1.6rem;
 }
 h2 {
  font-size: 1.3rem;
 }
 .header-actions {
  gap: 6px;
 }
 .header-version-select {
  display: none;
 }
 .page-heading {
  padding: 22px 18px;
 }
 .exhibitor-card .card-img {
  height: 160px;
 }
 .footer-top {
  flex-direction: column;
  gap: 24px;
 }
 .footer-links {
  gap: 24px;
 }
 .footer-bottom {
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
 }
}

@media (max-width: 520px) {
 .header-inner {
  gap: 10px;
  padding: 0 12px;
 }
 .logo-link {
  font-size: 1rem;
 }
 .logo-mark {
  width: 30px;
  height: 30px;
  font-size: 0.85rem;
 }
 .mobile-toggle {
  padding: 6px 10px;
 }
 .page-heading h1 {
  font-size: 1.35rem;
 }
 .exhibitor-card .card-body h3 {
  font-size: 0.95rem;
 }
 .compare-item {
  grid-template-columns: 1fr;
  gap: 8px;
 }
 .category-entry-grid {
  grid-template-columns: 1fr 1fr;
 }
}

/* roulang page: category5 */
:root {
            --primary: #1a3c34;
            --primary-dark: #0f2a24;
            --primary-mid: #245247;
            --primary-light: #3a6f62;
            --accent: #c5813a;
            --accent-dark: #a06828;
            --accent-light: #e0a458;
            --accent-pale: #f5e8d3;
            --bg: #f7f5f0;
            --bg-warm: #f0ede6;
            --card: #ffffff;
            --text: #1e2120;
            --text-strong: #161918;
            --text-mid: #3c4340;
            --text-light: #5a605d;
            --text-muted: #7d8480;
            --border: #ddd9d0;
            --border-light: #ece9e2;
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 20px;
            --shadow-xs: 0 1px 4px rgba(15, 42, 36, 0.05);
            --shadow-sm: 0 2px 12px rgba(15, 42, 36, 0.06);
            --shadow-md: 0 4px 18px rgba(15, 42, 36, 0.08);
            --shadow-lg: 0 8px 28px rgba(15, 42, 36, 0.12);
            --shadow-xl: 0 16px 48px rgba(15, 42, 36, 0.16);
            --font-family: system-ui, -apple-system, "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --sidebar-width: 260px;
            --header-height: 64px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            letter-spacing: 0.02em;
        }
        a {
            color: var(--primary-mid);
            text-decoration: none;
            transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: var(--font-family);
            font-size: inherit;
            line-height: inherit;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(197, 129, 58, 0.45);
            outline-offset: 2px;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding-top: 64px;
            padding-bottom: 64px;
        }
        .section-alt {
            background-color: var(--bg-warm);
        }
        .section-tight {
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .section-header {
            margin-bottom: 32px;
        }
        .section-header .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-dark);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header .eyebrow::before {
            content: '';
            display: inline-block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .section-header h2 {
            margin-bottom: 6px;
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--text-strong);
            line-height: 1.4;
            letter-spacing: 0.02em;
        }
        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            line-height: 1.85;
            max-width: 720px;
            margin: 0 auto;
        }
        .section-header.text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 8px rgba(15, 42, 36, 0.04);
            min-height: var(--header-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 0 24px;
            max-width: 1200px;
            margin: 0 auto;
            height: var(--header-height);
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--primary);
            letter-spacing: 0.04em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
            flex-shrink: 0;
        }
        .logo-link:hover {
            color: var(--primary);
            opacity: 0.8;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-light);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 2px;
            margin: 0 auto;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .main-nav::-webkit-scrollbar {
            display: none;
        }
        .main-nav .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-mid);
            border-radius: 8px;
            white-space: nowrap;
            transition: color var(--transition-fast), background-color var(--transition-fast);
            border: none;
            background: none;
            cursor: pointer;
        }
        .main-nav .nav-link:hover {
            color: var(--primary);
            background-color: rgba(26, 60, 52, 0.06);
        }
        .main-nav .nav-link.active {
            color: var(--primary);
            background-color: rgba(26, 60, 52, 0.09);
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .header-search {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 6px 12px;
            width: 190px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .header-search:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(58, 111, 98, 0.12);
        }
        .header-search i {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .header-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.88rem;
            color: var(--text);
            width: 100%;
            padding: 0;
        }
        .header-search input::placeholder {
            color: var(--text-muted);
            font-size: 0.82rem;
        }
        .header-select {
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 6px 10px;
            font-size: 0.82rem;
            color: var(--text-mid);
            background: var(--bg);
            cursor: pointer;
            outline: none;
            transition: border-color var(--transition-fast);
        }
        .header-select:focus {
            border-color: var(--primary-light);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 8px 12px;
            font-size: 1.1rem;
            color: var(--primary);
            cursor: pointer;
            transition: background-color var(--transition-fast);
            flex-shrink: 0;
            align-items: center;
            justify-content: center;
        }
        .nav-toggle:hover {
            background-color: rgba(26, 60, 52, 0.06);
        }

        /* Layout with sidebar */
        .page-layout {
            display: flex;
            gap: 32px;
            align-items: flex-start;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .sidebar-col {
            flex: 0 0 var(--sidebar-width);
            position: sticky;
            top: calc(var(--header-height) + 20px);
            max-height: calc(100vh - var(--header-height) - 40px);
            overflow-y: auto;
            padding-bottom: 20px;
            scrollbar-width: thin;
        }
        .sidebar-col::-webkit-scrollbar {
            width: 4px;
        }
        .sidebar-col::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }
        .main-col {
            flex: 1;
            min-width: 0;
            padding-bottom: 40px;
        }
        .doc-sidebar {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 20px 18px;
            box-shadow: var(--shadow-xs);
        }
        .doc-sidebar h3 {
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--text-muted);
            letter-spacing: 0.08em;
            text-transform: uppercase;
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 1px solid var(--border-light);
        }
        .doc-sidebar .sidebar-link {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 9px 12px;
            font-size: 0.88rem;
            color: var(--text-mid);
            border-left: 3px solid transparent;
            border-radius: 0 8px 8px 0;
            transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
            margin-bottom: 2px;
        }
        .doc-sidebar .sidebar-link:hover {
            color: var(--primary);
            background-color: rgba(26, 60, 52, 0.04);
        }
        .doc-sidebar .sidebar-link.active {
            color: var(--primary);
            background-color: rgba(26, 60, 52, 0.07);
            border-left-color: var(--primary);
            font-weight: 600;
        }
        .doc-sidebar .sidebar-link i {
            font-size: 0.78rem;
            width: 16px;
            text-align: center;
            color: var(--text-muted);
        }
        .sidebar-version {
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .sidebar-version label {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-muted);
            display: block;
            margin-bottom: 6px;
        }
        .sidebar-version select {
            width: 100%;
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 7px 10px;
            font-size: 0.85rem;
            color: var(--text-mid);
            background: var(--bg);
            cursor: pointer;
            outline: none;
        }
        .sidebar-download {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-top: 14px;
            padding: 10px 12px;
            background: var(--accent-pale);
            border-radius: 8px;
            font-size: 0.85rem;
            color: var(--accent-dark);
            font-weight: 600;
            transition: background-color var(--transition-fast);
        }
        .sidebar-download:hover {
            background: var(--accent-light);
            color: var(--accent-dark);
        }
        .sidebar-download i {
            font-size: 0.9rem;
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            padding: 16px 0 8px;
            font-size: 0.82rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: wrap;
        }
        .breadcrumb-bar a {
            color: var(--text-light);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: color var(--transition-fast);
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-bar .separator {
            color: var(--text-muted);
            font-size: 0.7rem;
        }
        .breadcrumb-bar .current {
            color: var(--text-mid);
            font-weight: 500;
        }

        /* Page hero - narrow banner */
        .page-hero {
            position: relative;
            background: var(--primary-dark);
            border-radius: var(--radius-lg);
            overflow: hidden;
            padding: 40px 36px;
            margin-bottom: 36px;
            background-image: linear-gradient(rgba(15, 42, 36, 0.85), rgba(15, 42, 36, 0.92)), url('/assets/images/9fc0a91c9b103d06.webp');
            background-size: cover;
            background-position: center;
            color: #fff;
        }
        .page-hero .hero-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(197, 129, 58, 0.85);
            color: #fff;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.06em;
            margin-bottom: 14px;
        }
        .page-hero h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.35;
            color: #fff;
            margin: 0 0 12px 0;
            letter-spacing: 0.02em;
        }
        .page-hero .hero-desc {
            font-size: 0.98rem;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.85;
            max-width: 680px;
            margin: 0;
        }

        /* Article list */
        .article-list-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .article-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--border);
        }
        .article-card .card-image {
            aspect-ratio: 16/9;
            background: var(--bg-warm);
            overflow: hidden;
            position: relative;
        }
        .article-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .card-image img {
            transform: scale(1.03);
        }
        .article-card .card-body {
            padding: 18px 20px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 8px;
            flex-wrap: wrap;
        }
        .article-card .card-meta .version-badge {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: 4px;
            background: var(--accent-pale);
            color: var(--accent-dark);
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.03em;
        }
        .article-card .card-meta .date-label {
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .article-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-strong);
            line-height: 1.5;
            margin: 0 0 8px 0;
            transition: color var(--transition-fast);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card:hover .card-title {
            color: var(--primary);
        }
        .article-card .card-excerpt {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.8;
            margin: 0 0 14px 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary-mid);
            margin-top: auto;
            transition: color var(--transition-fast), gap var(--transition-fast);
        }
        .article-card .card-link:hover {
            color: var(--primary);
            gap: 10px;
        }
        .article-card .card-link i {
            font-size: 0.75rem;
        }
        .list-more-btn {
            text-align: center;
            margin-top: 28px;
        }
        .btn-outline-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border: 1.5px solid var(--primary-mid);
            border-radius: 10px;
            background: transparent;
            color: var(--primary-mid);
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
        }
        .btn-outline-primary-custom:hover {
            background: var(--primary-mid);
            color: #fff;
            border-color: var(--primary-mid);
        }
        .btn-accent {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border: none;
            border-radius: 10px;
            background: var(--accent);
            color: #fff;
            font-size: 0.92rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            letter-spacing: 0.03em;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border: none;
            border-radius: 10px;
            background: var(--primary);
            color: #fff;
            font-size: 0.92rem;
            font-weight: 600;
            cursor: pointer;
            transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
            letter-spacing: 0.03em;
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        /* FAQ section */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--border);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-strong);
            line-height: 1.6;
            user-select: none;
            transition: color var(--transition-fast);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-item .faq-question:hover {
            color: var(--primary);
        }
        .faq-item .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--accent-pale);
            color: var(--accent-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: background-color var(--transition-fast), transform var(--transition-fast);
        }
        .faq-item .faq-question .faq-icon.rotated {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            padding: 0 20px 18px 60px;
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.85;
            display: none;
        }
        .faq-item .faq-answer.show {
            display: block;
        }

        /* Category entry */
        .category-entry-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }
        .category-entry-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 22px 20px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            transition: box-shadow var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
        }
        .category-entry-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
            transform: translateY(-2px);
        }
        .category-entry-card .entry-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--accent-pale);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-dark);
            font-size: 1.05rem;
            flex-shrink: 0;
        }
        .category-entry-card .entry-info h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-strong);
            margin: 0 0 4px 0;
            line-height: 1.4;
        }
        .category-entry-card .entry-info p {
            font-size: 0.82rem;
            color: var(--text-light);
            margin: 0;
            line-height: 1.7;
        }

        /* Tech param table */
        .tech-param-panel {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 28px 30px;
            box-shadow: var(--shadow-sm);
        }
        .tech-param-panel h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-strong);
            margin: 0 0 18px 0;
        }
        .param-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            gap: 16px;
            flex-wrap: wrap;
        }
        .param-row:last-child {
            border-bottom: none;
        }
        .param-row .param-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
            min-width: 140px;
        }
        .param-row .param-value {
            font-size: 0.9rem;
            color: var(--text-strong);
            font-weight: 600;
            text-align: right;
        }
        .param-row .param-value .unit {
            font-size: 0.78rem;
            color: var(--text-muted);
            font-weight: 400;
            margin-left: 4px;
        }

        /* CTA section */
        .cta-panel {
            background: var(--primary-dark);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            background-image: linear-gradient(rgba(15, 42, 36, 0.92), rgba(15, 42, 36, 0.96)), url('/assets/images/d8a47babd8c9ac71.webp');
            background-size: cover;
            background-position: center;
        }
        .cta-panel .cta-info h3 {
            font-size: 1.35rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 8px 0;
            line-height: 1.45;
        }
        .cta-panel .cta-info p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.75);
            margin: 0;
            line-height: 1.8;
            max-width: 560px;
        }
        .cta-panel .cta-actions {
            display: flex;
            gap: 12px;
            flex-shrink: 0;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.72);
            padding: 48px 24px 28px;
            margin-top: 48px;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer-top {
            display: flex;
            justify-content: space-between;
            gap: 40px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }
        .footer-brand .logo-link {
            color: #fff;
            font-size: 1.15rem;
            margin-bottom: 12px;
        }
        .footer-brand .logo-link .logo-mark {
            background: var(--accent);
            color: #fff;
        }
        .footer-brand .logo-link:hover {
            color: #fff;
            opacity: 0.85;
        }
        .footer-desc {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            max-width: 340px;
            margin: 0;
        }
        .footer-links {
            display: flex;
            gap: 48px;
            flex-wrap: wrap;
        }
        .footer-link-group h4 {
            font-size: 0.82rem;
            font-weight: 700;
            color: rgba(255, 255, 255, 0.85);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin: 0 0 14px 0;
        }
        .footer-link-group a {
            display: block;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }
        .footer-link-group a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom p {
            margin: 0;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        .footer-divider {
            margin: 0 8px;
            color: rgba(255, 255, 255, 0.3);
        }
        .footer-icp {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.45);
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .sidebar-col {
                display: none;
            }
            .page-layout {
                padding: 0 24px;
                display: block;
            }
            .main-col {
                width: 100%;
            }
            .header-search {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                padding: 12px 24px;
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
                z-index: 1035;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav .nav-link {
                padding: 12px 14px;
                font-size: 0.92rem;
                border-radius: 6px;
            }
            .header-select {
                display: none;
            }
            .article-list-grid {
                grid-template-columns: 1fr;
            }
            .category-entry-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-hero h1 {
                font-size: 1.9rem;
            }
            .cta-panel {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
        }
        @media (max-width: 767.98px) {
            .section {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            .container-custom,
            .page-layout {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-inner {
                padding: 0 16px;
                gap: 10px;
            }
            .page-hero {
                padding: 28px 20px;
                border-radius: var(--radius);
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero .hero-desc {
                font-size: 0.9rem;
            }
            .category-entry-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .faq-item .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-item .faq-answer {
                padding: 0 16px 14px 50px;
                font-size: 0.86rem;
            }
            .tech-param-panel {
                padding: 20px 18px;
            }
            .param-row {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
            .param-row .param-value {
                text-align: left;
            }
            .cta-panel {
                padding: 28px 20px;
            }
            .cta-panel .cta-info h3 {
                font-size: 1.15rem;
            }
            .btn-accent,
            .btn-primary-custom {
                padding: 10px 20px;
                font-size: 0.85rem;
            }
            .footer-top {
                flex-direction: column;
                gap: 24px;
            }
            .footer-links {
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }
        @media (max-width: 575.98px) {
            .page-hero h1 {
                font-size: 1.4rem;
            }
            .page-hero .hero-tag {
                font-size: 0.7rem;
                padding: 3px 10px;
            }
            .section-header h2 {
                font-size: 1.3rem;
            }
            .article-card .card-title {
                font-size: 0.95rem;
            }
            .article-card .card-body {
                padding: 14px 16px 16px;
            }
            .btn-accent,
            .btn-primary-custom {
                width: 100%;
                justify-content: center;
            }
            .cta-actions {
                width: 100%;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #1a3c34;
            --primary-dark: #0f2a24;
            --primary-mid: #245247;
            --primary-light: #3a6f62;
            --accent: #c5813a;
            --accent-dark: #a06828;
            --accent-light: #e0a458;
            --accent-pale: #f5e8d3;
            --bg: #f7f5f0;
            --bg-warm: #f0ede6;
            --card: #ffffff;
            --text: #1e2120;
            --text-strong: #161918;
            --text-mid: #3c4340;
            --text-light: #5a605d;
            --text-muted: #7d8480;
            --border: #ddd9d0;
            --border-light: #ece9e2;
            --radius-sm: 8px;
            --radius: 16px;
            --radius-lg: 20px;
            --shadow-xs: 0 1px 4px rgba(15, 42, 36, 0.05);
            --shadow-sm: 0 2px 12px rgba(15, 42, 36, 0.06);
            --shadow-md: 0 4px 18px rgba(15, 42, 36, 0.08);
            --shadow-lg: 0 8px 28px rgba(15, 42, 36, 0.12);
            --shadow-xl: 0 16px 48px rgba(15, 42, 36, 0.16);
            --font-family: system-ui, -apple-system, "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Noto Sans SC", sans-serif;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --sidebar-width: 260px;
            --header-height: 64px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text);
            background-color: var(--bg);
            margin: 0;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            letter-spacing: 0.02em;
        }
        a {
            color: var(--primary-mid);
            text-decoration: none;
            transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: var(--font-family);
            font-size: inherit;
            line-height: inherit;
        }
        button:focus-visible,
        a:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 3px solid rgba(197, 129, 58, 0.45);
            outline-offset: 2px;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.45;
            color: var(--text-strong);
            margin-top: 0;
            letter-spacing: 0.01em;
        }
        h1 {
            font-size: 2.2rem;
            line-height: 1.35;
            margin-bottom: 1rem;
        }
        h2 {
            font-size: 1.6rem;
            line-height: 1.4;
            margin-bottom: 0.8rem;
        }
        h3 {
            font-size: 1.2rem;
            line-height: 1.5;
            margin-bottom: 0.6rem;
        }
        h4 {
            font-size: 1.05rem;
            line-height: 1.5;
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1.2em;
            line-height: 1.9;
        }
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding-top: 64px;
            padding-bottom: 64px;
        }
        .section-alt {
            background-color: var(--bg-warm);
        }
        .section-tight {
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .section-header {
            margin-bottom: 32px;
        }
        .section-header .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-dark);
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header .eyebrow::before {
            content: '';
            display: inline-block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .section-header h2 {
            margin-bottom: 6px;
        }
        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            line-height: 1.85;
            max-width: 720px;
            margin: 0;
        }
        .section-header.text-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }
        .section-header.text-center .eyebrow {
            justify-content: center;
        }
        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 8px rgba(15, 42, 36, 0.04);
            min-height: var(--header-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 0 24px;
            max-width: 1200px;
            margin: 0 auto;
            height: var(--header-height);
            position: relative;
        }
        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--primary);
            letter-spacing: 0.04em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
            flex-shrink: 0;
        }
        .logo-link:hover {
            color: var(--primary);
            opacity: 0.8;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-light);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .main-nav::-webkit-scrollbar {
            display: none;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-mid);
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: color var(--transition-fast), background-color var(--transition-fast);
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background-color: var(--accent-pale);
        }
        .nav-link.active {
            color: var(--primary);
            background-color: var(--bg-warm);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .search-form {
            display: flex;
            align-items: center;
            gap: 6px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 4px 10px;
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .search-form:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 60, 52, 0.12);
        }
        .search-form input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.88rem;
            color: var(--text);
            width: 160px;
        }
        .search-form input::placeholder {
            color: var(--text-muted);
            font-size: 0.82rem;
        }
        .search-form button {
            border: none;
            background: transparent;
            color: var(--text-muted);
            cursor: pointer;
            padding: 2px 4px;
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .search-form button:hover {
            color: var(--primary);
        }
        .header-select {
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--card);
            padding: 6px 8px;
            font-size: 0.82rem;
            color: var(--text-mid);
            cursor: pointer;
            transition: border-color var(--transition-fast);
            max-width: 100px;
        }
        .header-select:focus {
            border-color: var(--primary-light);
        }
        .lang-switch {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-mid);
            padding: 6px 10px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--card);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .lang-switch:hover {
            color: var(--primary);
            border-color: var(--primary-light);
            background: var(--bg-warm);
        }
        .navbar-toggler-custom {
            display: none;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--card);
            color: var(--text-mid);
            padding: 8px 12px;
            cursor: pointer;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }
        .navbar-toggler-custom:hover {
            color: var(--primary);
            border-color: var(--primary-light);
        }
        /* Breadcrumb */
        .breadcrumb-wrap {
            padding: 20px 0 10px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .breadcrumb-wrap a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .breadcrumb-wrap a:hover {
            color: var(--primary);
        }
        .breadcrumb-sep {
            margin: 0 6px;
            color: var(--border);
        }
        /* Layout with sidebar */
        .docs-layout {
            display: flex;
            gap: 32px;
            align-items: flex-start;
        }
        .docs-sidebar {
            width: var(--sidebar-width);
            flex-shrink: 0;
            position: sticky;
            top: calc(var(--header-height) + 20px);
            max-height: calc(100vh - var(--header-height) - 40px);
            overflow-y: auto;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 20px 16px;
            box-shadow: var(--shadow-xs);
        }
        .docs-sidebar-title {
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--text-muted);
            margin-bottom: 12px;
            padding: 0 8px;
        }
        .docs-sidebar-nav {
            list-style: none;
            padding: 0;
            margin: 0 0 16px;
        }
        .docs-sidebar-nav li {
            margin-bottom: 2px;
        }
        .docs-sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            font-size: 0.88rem;
            color: var(--text-mid);
            transition: all var(--transition-fast);
            border-left: 3px solid transparent;
        }
        .docs-sidebar-nav a:hover {
            background: var(--bg-warm);
            color: var(--primary);
        }
        .docs-sidebar-nav a.active {
            background: var(--accent-pale);
            color: var(--primary);
            border-left-color: var(--primary);
            font-weight: 600;
        }
        .sidebar-version-select {
            width: 100%;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--bg);
            padding: 8px 10px;
            font-size: 0.82rem;
            color: var(--text-mid);
            margin-bottom: 12px;
            cursor: pointer;
        }
        .sidebar-version-select:focus {
            border-color: var(--primary-light);
            outline: none;
        }
        .sidebar-note {
            font-size: 0.76rem;
            color: var(--text-muted);
            padding: 8px;
            background: var(--bg-warm);
            border-radius: var(--radius-sm);
            line-height: 1.7;
        }
        .docs-content {
            flex: 1;
            min-width: 0;
        }
        /* Page intro strip */
        .page-intro {
            padding: 24px 0 8px;
        }
        .page-intro h1 {
            margin-bottom: 10px;
        }
        .page-intro .intro-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 14px;
        }
        .page-intro .intro-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .page-intro .intro-desc {
            font-size: 1rem;
            color: var(--text-light);
            line-height: 1.85;
            max-width: 820px;
        }
        /* Resource list */
        .resource-list {
            display: grid;
            gap: 16px;
            margin-top: 8px;
        }
        .resource-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 18px 20px;
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-base), transform var(--transition-base), border-color var(--transition-base);
        }
        .resource-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
            transform: translateY(-2px);
        }
        .resource-thumb {
            width: 72px;
            height: 72px;
            flex-shrink: 0;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--bg-warm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary-light);
        }
        .resource-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .resource-info {
            flex: 1;
            min-width: 0;
        }
        .resource-info h3 {
            font-size: 1.08rem;
            margin-bottom: 6px;
            line-height: 1.45;
        }
        .resource-info h3 a {
            color: var(--text-strong);
            transition: color var(--transition-fast);
        }
        .resource-info h3 a:hover {
            color: var(--primary);
        }
        .resource-info p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.75;
            margin-bottom: 8px;
        }
        .resource-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .badge-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            background: var(--bg-warm);
            color: var(--text-mid);
            letter-spacing: 0.02em;
        }
        .badge-tag.badge-version {
            background: var(--accent-pale);
            color: var(--accent-dark);
        }
        .badge-tag.badge-format {
            background: #e8ecea;
            color: var(--primary-mid);
        }
        .badge-tag.badge-size {
            background: #f0f0ed;
            color: var(--text-muted);
        }
        .resource-download {
            flex-shrink: 0;
            align-self: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: none;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.92rem;
            padding: 10px 20px;
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(197, 129, 58, 0.45);
            outline-offset: 2px;
        }
        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .btn-accent-custom {
            background: var(--accent);
            color: #fff;
        }
        .btn-accent-custom:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline-custom {
            background: transparent;
            border: 1px solid var(--accent);
            color: var(--accent-dark);
        }
        .btn-outline-custom:hover {
            background: var(--accent-pale);
            color: var(--accent-dark);
            border-color: var(--accent-dark);
        }
        .btn-sm {
            padding: 7px 14px;
            font-size: 0.82rem;
        }
        .btn-lg {
            padding: 14px 28px;
            font-size: 1rem;
        }
        .btn:disabled,
        .btn.disabled {
            background: #d0ceca;
            color: #8a8a8a;
            cursor: not-allowed;
            pointer-events: none;
            box-shadow: none;
            transform: none;
        }
        /* Section header small variant */
        .section-header-sm h2 {
            font-size: 1.35rem;
            margin-bottom: 8px;
        }
        /* Version info card */
        .version-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 24px 28px;
            box-shadow: var(--shadow-xs);
        }
        .version-card .version-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            color: var(--accent-dark);
            background: var(--accent-pale);
            padding: 4px 12px;
            border-radius: 4px;
            margin-bottom: 12px;
        }
        .version-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .version-card ul li {
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--text-mid);
            line-height: 1.7;
        }
        .version-card ul li:last-child {
            border-bottom: none;
        }
        .version-card ul li i {
            color: var(--primary-light);
            margin-top: 4px;
            flex-shrink: 0;
        }
        /* FAQ styles */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            overflow: hidden;
            box-shadow: var(--shadow-xs);
            transition: box-shadow var(--transition-base), border-color var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 16px 20px;
            cursor: pointer;
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--text-strong);
            transition: color var(--transition-fast);
            user-select: none;
            -webkit-user-select: none;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg-warm);
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            color: var(--accent-dark);
            background: var(--accent-pale);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0 20px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 0;
        }
        /* Category entry cards */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 16px;
        }
        .category-entry-card {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            padding: 16px 18px;
            box-shadow: var(--shadow-xs);
            transition: all var(--transition-base);
        }
        .category-entry-card:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .category-entry-card .cat-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            border-radius: var(--radius-sm);
            background: var(--bg-warm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--primary-light);
        }
        .category-entry-card .cat-info h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }
        .category-entry-card .cat-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.5;
        }
        /* CTA strip */
        .cta-strip {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .cta-strip h3 {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 6px;
        }
        .cta-strip p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.92rem;
            margin-bottom: 0;
            line-height: 1.7;
        }
        .cta-strip .btn-accent-custom {
            flex-shrink: 0;
        }
        /* Form */
        .form-card {
            background: var(--card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
        }
        .form-label {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-mid);
            margin-bottom: 6px;
            display: block;
        }
        .form-control-custom {
            width: 100%;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.92rem;
            color: var(--text);
            background: var(--bg);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
            line-height: 1.5;
        }
        .form-control-custom:focus {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 3px rgba(26, 60, 52, 0.1);
            outline: none;
            background: #fff;
        }
        .form-control-custom::placeholder {
            color: var(--text-muted);
        }
        textarea.form-control-custom {
            resize: vertical;
            min-height: 100px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-privacy {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 12px;
            line-height: 1.6;
        }
        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.75);
            margin-top: 48px;
        }
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 48px 24px 28px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand .logo-link {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .logo-link:hover {
            color: #fff;
            opacity: 0.85;
        }
        .footer-brand .logo-mark {
            background: var(--accent);
            color: #fff;
        }
        .footer-desc {
            font-size: 0.88rem;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-links {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .footer-link-group h4 {
            font-size: 0.9rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 12px;
        }
        .footer-link-group a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            padding: 4px 0;
            transition: color var(--transition-fast);
        }
        .footer-link-group a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom p {
            margin-bottom: 0;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        .footer-divider {
            margin: 0 6px;
            color: rgba(255, 255, 255, 0.3);
        }
        /* Mobile sidebar toggle */
        .sidebar-mobile-toggle {
            display: none;
            margin-bottom: 16px;
        }
        /* Responsive */
        @media (max-width: 991px) {
            .docs-layout {
                flex-direction: column;
            }
            .docs-sidebar {
                width: 100%;
                position: static;
                max-height: none;
                margin-bottom: 16px;
            }
            .sidebar-mobile-toggle {
                display: block;
            }
            .docs-sidebar-content {
                display: none;
            }
            .docs-sidebar-content.show {
                display: block;
            }
            .header-inner {
                flex-wrap: wrap;
                height: auto;
                padding: 10px 16px;
                gap: 10px;
            }
            .main-nav {
                order: 3;
                width: 100%;
                overflow-x: auto;
                gap: 2px;
                padding-bottom: 6px;
            }
            .header-actions {
                margin-left: auto;
            }
            .search-form input {
                width: 120px;
            }
            .navbar-toggler-custom {
                display: inline-flex;
                align-items: center;
            }
            .mobile-nav-collapse {
                display: none;
            }
            .mobile-nav-collapse.show {
                display: flex;
                flex-direction: column;
                width: 100%;
                gap: 4px;
                padding: 8px 0;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-links {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-strip {
                padding: 20px 24px;
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 767px) {
            .section {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            h3 {
                font-size: 1.05rem;
            }
            .resource-item {
                flex-direction: column;
                gap: 12px;
                padding: 14px 16px;
            }
            .resource-thumb {
                width: 56px;
                height: 56px;
                font-size: 1.2rem;
            }
            .resource-download {
                align-self: flex-start;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .header-actions {
                gap: 6px;
            }
            .search-form input {
                width: 90px;
                font-size: 0.78rem;
            }
            .lang-switch {
                padding: 4px 8px;
                font-size: 0.75rem;
            }
            .header-select {
                font-size: 0.75rem;
                padding: 4px 6px;
                max-width: 80px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
            }
        }
        @media (max-width: 520px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-intro h1 {
                font-size: 1.4rem;
            }
            .cta-strip {
                padding: 18px;
            }
            .cta-strip h3 {
                font-size: 1.1rem;
            }
            .btn {
                padding: 8px 16px;
                font-size: 0.85rem;
            }
            .btn-lg {
                padding: 12px 20px;
                font-size: 0.92rem;
            }
            .footer-links {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .form-card {
                padding: 20px 16px;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}