/* roulang page: index */
:root {
            --primary-navy: #1E3A8A;
            --primary-blue: #2563EB;
            --accent-sky: #0284C7;
            --accent-light: #F1F5F9;
            --bg-canvas: #F8FAFC;
            --bg-surface: #FFFFFF;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-soft: rgba(148, 163, 184, 0.2);
            --card-shadow: 0 10px 25px -5px rgba(30, 58, 138, 0.05), 0 8px 10px -6px rgba(30, 58, 138, 0.03);
            --hover-shadow: 0 20px 30px -10px rgba(30, 58, 138, 0.12);
            --radius-main: 12px;
            --radius-sm: 8px;
            --radius-pill: 50px;
            --transition-smooth: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* Reset & Base */
        *, *::before, *::after {
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-body);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            color: var(--text-heading);
            font-weight: 700;
            letter-spacing: -0.02em;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-smooth);
        }
        a:hover {
            color: var(--primary-blue);
        }

        /* Top Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1020;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-soft);
        }
        .header-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary-navy);
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .header-brand .brand-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary-navy), var(--primary-blue));
            color: #fff;
            font-size: 1rem;
            box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
        }
        .nav-link-custom {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
        }
        .nav-link-custom:hover,
        .nav-link-custom.active {
            color: var(--primary-blue);
            background-color: rgba(37, 99, 235, 0.05);
        }
        .lang-capsule {
            display: inline-flex;
            align-items: center;
            background: #F1F5F9;
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-pill);
            padding: 3px 4px;
            gap: 2px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .lang-pill {
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            color: var(--text-muted);
            cursor: pointer;
            transition: var(--transition-smooth);
        }
        .lang-pill.active {
            background-color: #FFFFFF;
            color: var(--primary-navy);
            box-shadow: 0 2px 4px rgba(0,0,0,0.06);
        }

        /* Custom Components */
        .btn-brand-primary {
            background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
            color: #FFFFFF;
            border: none;
            border-radius: var(--radius-sm);
            padding: 0.7rem 1.6rem;
            font-weight: 600;
            font-size: 0.95rem;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-brand-primary:hover {
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
        }
        .btn-brand-outline {
            background: #FFFFFF;
            color: var(--primary-navy);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-sm);
            padding: 0.7rem 1.6rem;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition-smooth);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-brand-outline:hover {
            border-color: var(--primary-blue);
            color: var(--primary-blue);
            background: rgba(37, 99, 235, 0.03);
            transform: translateY(-2px);
        }
        .section-tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--primary-blue);
            background: rgba(37, 99, 235, 0.08);
            padding: 0.35rem 0.85rem;
            border-radius: var(--radius-pill);
            margin-bottom: 0.85rem;
        }
        .card-elegant {
            background: var(--bg-surface);
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-main);
            box-shadow: var(--card-shadow);
            transition: var(--transition-smooth);
        }
        .card-elegant:hover {
            box-shadow: var(--hover-shadow);
            transform: translateY(-3px);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .badge-sub {
            font-size: 0.72rem;
            font-weight: 600;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            background: rgba(2, 132, 199, 0.1);
            color: var(--accent-sky);
        }

        /* Section Specifics */
        .hero-section {
            background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
            padding: 5rem 0 4.5rem;
            border-bottom: 1px solid var(--border-soft);
        }
        .metric-card {
            background: #FFFFFF;
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-main);
            padding: 1.75rem 1.25rem;
            text-align: center;
            box-shadow: var(--card-shadow);
        }
        .metric-card .num {
            font-size: 2.3rem;
            font-weight: 800;
            color: var(--primary-navy);
            line-height: 1.1;
            margin-bottom: 0.35rem;
        }
        .workflow-step {
            position: relative;
            padding: 2rem 1.5rem;
            background: #FFFFFF;
            border: 1px solid var(--border-soft);
            border-radius: var(--radius-main);
            box-shadow: var(--card-shadow);
            height: 100%;
        }
        .workflow-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin-bottom: 1.25rem;
        }
        .compare-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            background: #FFFFFF;
            border-radius: var(--radius-main);
            border: 1px solid var(--border-soft);
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }
        .compare-table th, .compare-table td {
            padding: 1.1rem 1.25rem;
            border-bottom: 1px solid var(--border-soft);
            vertical-align: middle;
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-highlight {
            background-color: rgba(37, 99, 235, 0.03);
            font-weight: 600;
            color: var(--primary-navy);
        }
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: #10B981;
            display: inline-block;
            margin-right: 6px;
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(37, 99, 235, 0.04);
            color: var(--primary-navy);
            box-shadow: none;
        }
        .accordion-item {
            border: 1px solid var(--border-soft);
            margin-bottom: 0.75rem;
            border-radius: var(--radius-sm) !important;
            overflow: hidden;
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(37, 99, 235, 0.3);
        }

        /* Footer */
        .site-footer {
            background: #0B132B;
            color: #94A3B8;
            padding: 4.5rem 0 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer h5 {
            color: #F8FAFC;
            font-size: 1.05rem;
            margin-bottom: 1.25rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 0.65rem;
        }
        .footer-links a {
            color: #94A3B8;
            font-size: 0.92rem;
        }
        .footer-links a:hover {
            color: #38BDF8;
        }

        @media (max-width: 991.98px) {
            .hero-section {
                padding: 3.5rem 0 3rem;
            }
        }

/* roulang page: category1 */
:root {
        --primary-navy: #1E3A8A;
        --primary-blue: #2563EB;
        --accent-sky: #0284C7;
        --accent-light: #F1F5F9;
        --bg-canvas: #F8FAFC;
        --bg-surface: #FFFFFF;
        --text-heading: #0F172A;
        --text-body: #334155;
        --text-muted: #64748B;
        --border-soft: rgba(148, 163, 184, 0.2);
        --card-shadow: 0 10px 25px -5px rgba(30, 58, 138, 0.05), 0 8px 10px -6px rgba(30, 58, 138, 0.03);
        --hover-shadow: 0 20px 30px -10px rgba(30, 58, 138, 0.12);
        --radius-main: 12px;
        --radius-sm: 8px;
        --radius-pill: 50px;
        --transition-smooth: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
        background-color: var(--bg-canvas);
        color: var(--text-body);
        line-height: 1.65;
        -webkit-font-smoothing: antialiased;
        overflow-x: hidden;
    }
    a {
        color: inherit;
        text-decoration: none;
        transition: var(--transition-smooth);
    }
    a:hover {
        color: var(--primary-blue);
    }
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1020;
        background: rgba(255, 255, 255, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--border-soft);
    }
    .header-brand {
        font-size: 1.25rem;
        font-weight: 800;
        color: var(--primary-navy);
        display: flex;
        align-items: center;
        gap: 0.6rem;
    }
    .header-brand .brand-badge {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 38px;
        height: 38px;
        border-radius: var(--radius-sm);
        background: linear-gradient(135deg, var(--primary-navy), var(--primary-blue));
        color: #fff;
        font-size: 1rem;
        box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
    }
    .nav-link-custom {
        font-size: 0.95rem;
        font-weight: 500;
        color: var(--text-body);
        padding: 0.5rem 1rem;
        border-radius: var(--radius-sm);
    }
    .nav-link-custom:hover,
    .nav-link-custom.active {
        color: var(--primary-blue);
        background-color: rgba(37, 99, 235, 0.05);
    }
    .lang-capsule {
        background: #EDF2F7;
        padding: 3px 5px;
        border-radius: var(--radius-pill);
        display: inline-flex;
        align-items: center;
        border: 1px solid rgba(148, 163, 184, 0.25);
    }
    .lang-pill {
        padding: 4px 10px;
        border-radius: var(--radius-pill);
        font-size: 0.8rem;
        font-weight: 600;
        color: var(--text-muted);
        cursor: pointer;
        transition: var(--transition-smooth);
    }
    .lang-pill.active {
        background-color: #FFFFFF;
        color: var(--primary-navy);
        box-shadow: 0 2px 4px rgba(0,0,0,0.06);
    }
    .btn-brand-primary {
        background: linear-gradient(135deg, var(--primary-navy) 0%, var(--primary-blue) 100%);
        color: #FFFFFF;
        border: none;
        border-radius: var(--radius-sm);
        padding: 0.7rem 1.6rem;
        font-weight: 600;
        font-size: 0.95rem;
        box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        transition: var(--transition-smooth);
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
    }
    .btn-brand-primary:hover {
        color: #FFFFFF;
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
    }
    .btn-brand-outline {
        background: #FFFFFF;
        color: var(--primary-navy);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-sm);
        padding: 0.7rem 1.6rem;
        font-weight: 600;
        font-size: 0.95rem;
        transition: var(--transition-smooth);
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
    }
    .btn-brand-outline:hover {
        border-color: var(--primary-blue);
        color: var(--primary-blue);
        background: rgba(37, 99, 235, 0.03);
        transform: translateY(-2px);
    }
    .section-tag {
        display: inline-block;
        font-size: 0.78rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        color: var(--primary-blue);
        background: rgba(37, 99, 235, 0.08);
        padding: 0.35rem 0.85rem;
        border-radius: var(--radius-pill);
        margin-bottom: 0.85rem;
    }
    .card-elegant {
        background: var(--bg-surface);
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-main);
        box-shadow: var(--card-shadow);
        transition: var(--transition-smooth);
    }
    .card-elegant:hover {
        box-shadow: var(--hover-shadow);
        transform: translateY(-3px);
        border-color: rgba(37, 99, 235, 0.3);
    }
    .badge-sub {
        font-size: 0.72rem;
        font-weight: 600;
        padding: 0.25rem 0.5rem;
        border-radius: 4px;
        background: rgba(2, 132, 199, 0.1);
        color: var(--accent-sky);
    }

    /* Category Specific Styles */
    .cat-header-box {
        background: #FFFFFF;
        border-bottom: 1px solid var(--border-soft);
        padding: 2.75rem 0 2rem;
    }
    .filter-chip-group {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        align-items: center;
    }
    .filter-chip {
        font-size: 0.85rem;
        padding: 0.4rem 0.9rem;
        border-radius: var(--radius-pill);
        background: #F1F5F9;
        color: var(--text-body);
        border: 1px solid transparent;
        cursor: pointer;
        transition: var(--transition-smooth);
        display: inline-flex;
        align-items: center;
        gap: 0.4rem;
    }
    .filter-chip:hover {
        background: #E2E8F0;
        color: var(--primary-navy);
    }
    .filter-chip.active {
        background: var(--primary-navy);
        color: #FFFFFF;
        box-shadow: 0 4px 10px rgba(30, 58, 138, 0.2);
    }
    .media-card {
        background: #FFFFFF;
        border: 1px solid var(--border-soft);
        border-radius: var(--radius-main);
        overflow: hidden;
        transition: var(--transition-smooth);
        height: 100%;
        display: flex;
        flex-direction: column;
    }
    .media-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--hover-shadow);
        border-color: rgba(37, 99, 235, 0.35);
    }
    .media-thumb-box {
        position: relative;
        aspect-ratio: 16 / 9;
        background: #0F172A;
        overflow: hidden;
    }
    .media-thumb-img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        opacity: 0.85;
        transition: var(--transition-smooth);
    }
    .media-card:hover .media-thumb-img {
        transform: scale(1.04);
        opacity: 0.95;
    }
    .media-overlay-badges {
        position: absolute;
        top: 0.75rem;
        left: 0.75rem;
        right: 0.75rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        pointer-events: none;
    }
    .media-duration {
        position: absolute;
        bottom: 0.65rem;
        right: 0.65rem;
        background: rgba(15, 23, 42, 0.8);
        color: #FFFFFF;
        font-size: 0.72rem;
        padding: 0.2rem 0.5rem;
        border-radius: 4px;
        backdrop-filter: blur(4px);
    }
    .media-play-hover {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) scale(0.8);
        width: 48px;
        height: 48px;
        border-radius: 50%;
        background: rgba(37, 99, 235, 0.9);
        color: #FFFFFF;
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        transition: var(--transition-smooth);
        box-shadow: 0 0 20px rgba(37, 99, 235, 0.6);
    }
    .media-card:hover .media-play-hover {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1);
    }
    .media-card-body {
        padding: 1.25rem;
        display: flex;
        flex-direction: column;
        flex-grow: 1;
    }
    .pick-rank-num {
        font-size: 2.2rem;
        font-weight: 900;
        line-height: 1;
        color: rgba(37, 99, 235, 0.25);
        min-width: 45px;
    }
    .tag-cloud-item {
        font-size: 0.88rem;
        padding: 0.45rem 1rem;
        border-radius: 6px;
        background: #FFFFFF;
        border: 1px solid var(--border-soft);
        color: var(--text-body);
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        transition: var(--transition-smooth);
    }
    .tag-cloud-item:hover {
        border-color: var(--primary-blue);
        color: var(--primary-blue);
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(37, 99, 235, 0.08);
    }
    .subscribe-bar {
        background: linear-gradient(135deg, #1E3A8A 0%, #172554 100%);
        border-radius: var(--radius-main);
        padding: 2.5rem;
        color: #FFFFFF;
    }
    .page-link-custom {
        width: 40px;
        height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
        border: 1px solid var(--border-soft);
        color: var(--text-body);
        font-weight: 600;
        background: #FFFFFF;
    }
    .page-link-custom.active {
        background: var(--primary-blue);
        color: #FFFFFF;
        border-color: var(--primary-blue);
    }
    .page-link-custom:hover:not(.active) {
        border-color: var(--primary-blue);
        color: var(--primary-blue);
    }
    .footer-custom {
        background: #0B132B;
    }
    .footer-link {
        color: #94A3B8;
        transition: var(--transition-smooth);
    }
    .footer-link:hover {
        color: #FFFFFF;
        padding-left: 4px;
    }

/* 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}