/* roulang page: index */
:root {
            --primary: #3B7C9E;
            --primary-dark: #2E617C;
            --primary-light: #E8F1F5;
            --secondary: #16313F;
            --secondary-light: #1F4255;
            --bg: #F5F8FA;
            --surface: #FFFFFF;
            --border: #D9E2EA;
            --text: #182630;
            --text-secondary: #6B7A89;
            --accent: #1CA3AA;
            --accent-light: #E4F4F5;
            --warning: #C2453A;
            --warning-light: #FBE9E7;
            --shadow-sm: 0 2px 8px rgba(30,45,60,0.05);
            --shadow-md: 0 8px 24px rgba(30,45,60,0.06);
            --shadow-lg: 0 16px 36px rgba(30,45,60,0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid rgba(59,124,158,0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        .container-main {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 768px) {
            .container-main {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        @media (min-width: 1200px) {
            .container-main {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .site-header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 16px;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .brand-logo:hover {
            color: var(--primary-dark);
        }
        .brand-logo .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .brand-logo .logo-text {
            font-size: 18px;
            line-height: 1.3;
        }
        .brand-logo .logo-sub {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.04em;
        }

        .header-search {
            flex: 1;
            max-width: 360px;
            min-width: 180px;
            position: relative;
        }
        .header-search input {
            width: 100%;
            padding: 10px 16px 10px 42px;
            border: 1.5px solid var(--border);
            border-radius: var(--radius-pill);
            background: var(--bg);
            color: var(--text);
            font-size: 14px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .header-search input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(59,124,158,0.12);
            background: var(--surface);
        }
        .header-search .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            border: 1.5px solid transparent;
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
            text-align: center;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 3px solid rgba(59,124,158,0.35);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.15);
        }
        .btn-secondary {
            background: var(--surface);
            color: var(--secondary);
            border-color: var(--border);
        }
        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.08);
        }
        .btn-warning-outline {
            background: transparent;
            color: var(--warning);
            border-color: var(--warning);
        }
        .btn-warning-outline:hover {
            background: var(--warning);
            color: #fff;
            border-color: var(--warning);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }
        .btn-sm {
            padding: 7px 16px;
            font-size: 13px;
            border-radius: var(--radius-sm);
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
            border-radius: var(--radius-pill);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: #16888F;
            border-color: #16888F;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        /* Channel Tabs */
        .site-nav-channels {
            border-top: 1px solid var(--border);
            background: var(--surface);
            padding: 0;
        }
        .channel-tabs {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding: 8px 0;
            white-space: nowrap;
        }
        .channel-tabs::-webkit-scrollbar {
            display: none;
        }
        .channel-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            border: none;
            background: transparent;
            cursor: pointer;
            flex-shrink: 0;
            line-height: 1.4;
        }
        .channel-tab:hover {
            background: var(--bg);
            color: var(--primary-dark);
        }
        .channel-tab.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: var(--shadow-sm);
        }
        .channel-tab .tab-icon {
            font-size: 13px;
            opacity: 0.8;
        }

        /* ========== Hero ========== */
        .hero-creator {
            position: relative;
            background: linear-gradient(180deg, #EAF2F6 0%, var(--bg) 100%);
            overflow: hidden;
            padding: 56px 0 48px;
        }
        .hero-creator::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 50%, var(--primary) 100%);
        }
        .hero-creator-inner {
            position: relative;
            z-index: 2;
        }
        .hero-creator-profile {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 20px;
            margin-bottom: 28px;
        }
        .hero-profile-row {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .hero-avatar {
            width: 88px;
            height: 88px;
            border-radius: 24px;
            overflow: hidden;
            border: 3px solid var(--surface);
            box-shadow: var(--shadow-md);
            flex-shrink: 0;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            color: var(--primary);
        }
        .hero-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .hero-nickname {
            font-size: 24px;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.01em;
            line-height: 1.3;
        }
        .hero-nickname .verified-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            color: var(--accent);
            background: var(--accent-light);
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            margin-left: 8px;
            vertical-align: middle;
        }
        .hero-stats-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .hero-stat-badge {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 10px 18px;
            box-shadow: var(--shadow-sm);
            font-size: 13px;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .hero-stat-badge:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .hero-stat-badge .stat-num {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }
        .hero-stat-badge .stat-label {
            font-size: 12px;
            color: var(--text-secondary);
            line-height: 1.3;
        }

        .hero-content {
            max-width: 760px;
        }
        .hero-content h1 {
            font-size: 32px;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.35;
            letter-spacing: -0.015em;
            margin-bottom: 16px;
        }
        .hero-content .hero-desc {
            font-size: 15.5px;
            line-height: 1.85;
            color: var(--text-secondary);
            margin-bottom: 24px;
            max-width: 640px;
        }
        .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .hero-follow-count {
            font-size: 13px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-follow-count i {
            color: var(--primary);
        }

        .hero-bg-image {
            position: absolute;
            right: -80px;
            bottom: -40px;
            width: 420px;
            max-width: 50%;
            opacity: 0.35;
            pointer-events: none;
            z-index: 0;
            border-radius: var(--radius-lg);
            overflow: hidden;
        }
        .hero-bg-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }

        @media (min-width: 992px) {
            .hero-creator {
                padding: 64px 0 56px;
            }
            .hero-creator-profile {
                flex-direction: row;
                align-items: center;
                justify-content: space-between;
                gap: 32px;
                margin-bottom: 32px;
            }
            .hero-content h1 {
                font-size: 38px;
            }
            .hero-content .hero-desc {
                font-size: 16.5px;
            }
            .hero-bg-image {
                width: 500px;
                opacity: 0.4;
                right: -60px;
            }
        }

        /* ========== Sections ========== */
        .site-section {
            padding: 56px 0;
        }
        @media (min-width: 992px) {
            .site-section {
                padding: 80px 0;
            }
        }

        .section-header {
            margin-bottom: 36px;
        }
        .section-header h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.01em;
            line-height: 1.4;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 15px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 680px;
            margin-bottom: 0;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        .section-alt {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .section-dark {
            background: var(--secondary);
            color: #E8F1F5;
        }
        .section-dark .section-header h2 {
            color: #fff;
        }
        .section-dark .section-header p {
            color: rgba(255,255,255,0.75);
        }
        .section-dark .section-header .section-tag {
            background: rgba(255,255,255,0.12);
            color: var(--accent);
        }

        /* ========== Entry Matrix ========== */
        .entry-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 20px;
        }
        .entry-matrix-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px;
            transition: all var(--transition);
            display: block;
            color: var(--text);
            box-shadow: var(--shadow-sm);
        }
        .entry-matrix-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--primary);
            color: var(--text);
        }
        .entry-matrix-card .entry-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            margin-bottom: 14px;
            transition: all var(--transition);
        }
        .entry-matrix-card:hover .entry-icon {
            background: var(--primary);
            color: #fff;
        }
        .entry-matrix-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .entry-matrix-card p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== Cards & Lists ========== */
        .content-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--border);
        }
        .content-card .card-image {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg);
            flex-shrink: 0;
        }
        .content-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .content-card:hover .card-image img {
            transform: scale(1.04);
        }
        .content-card .card-body {
            padding: 18px 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .content-card .card-title {
            font-size: 15.5px;
            font-weight: 600;
            color: var(--secondary);
            line-height: 1.5;
            margin-bottom: 8px;
        }
        .content-card .card-text {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            flex: 1;
        }
        .content-card .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            color: var(--text-secondary);
            flex-wrap: wrap;
        }
        .content-card .card-meta .badge-tag {
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 3px 10px;
            border-radius: var(--radius-sm);
        }
        .content-card .card-meta .meta-time {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .content-card-row {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 22px;
        }
        @media (min-width: 768px) {
            .content-card-row.cols-2 {
                grid-template-columns: repeat(2, 1fr);
            }
            .content-card-row.cols-3 {
                grid-template-columns: repeat(3, 1fr);
            }
            .content-card-row.cols-4 {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        /* ========== Data Stats ========== */
        .stats-dashboard {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
        }
        .stats-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .stats-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stats-item .stats-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stats-item .stats-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 6px;
            line-height: 1.5;
        }
        .stats-item .stats-icon {
            font-size: 22px;
            color: var(--accent);
            margin-bottom: 8px;
        }
        .section-dark .stats-item {
            background: rgba(255,255,255,0.06);
            border-color: rgba(255,255,255,0.12);
            box-shadow: none;
        }
        .section-dark .stats-item .stats-num {
            color: #fff;
        }
        .section-dark .stats-item .stats-label {
            color: rgba(255,255,255,0.7);
        }

        /* ========== Timeline ========== */
        .timeline-updates {
            position: relative;
            padding-left: 24px;
        }
        .timeline-updates::before {
            content: '';
            position: absolute;
            left: 6px;
            top: 4px;
            bottom: 4px;
            width: 2px;
            background: var(--border);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 20px;
            padding-left: 20px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -18px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            border: 2px solid var(--surface);
            box-shadow: 0 0 0 3px var(--primary-light);
        }
        .timeline-item .timeline-date {
            font-size: 12px;
            font-weight: 600;
            color: var(--accent);
            margin-bottom: 4px;
        }
        .timeline-item h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 4px;
        }
        .timeline-item p {
            font-size: 13.5px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ========== Device Guide ========== */
        .device-guide-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 16px;
        }
        .device-guide-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 18px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .device-guide-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--primary-light);
        }
        .device-guide-card .device-icon {
            font-size: 22px;
            color: var(--primary);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .device-guide-card h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 4px;
        }
        .device-guide-card p {
            font-size: 12.5px;
            color: var(--text-secondary);
            margin-bottom: 0;
            line-height: 1.6;
        }

        /* ========== App Multi-End ========== */
        .app-platforms {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .app-platform-btn {
            display: flex;
            align-items: center;
            gap: 10px;
            background: var(--surface);
            border: 1.5px solid var(--border);
            border-radius: var(--radius-md);
            padding: 14px 22px;
            font-weight: 600;
            font-size: 14px;
            color: var(--secondary);
            transition: all var(--transition);
            cursor: pointer;
            box-shadow: var(--shadow-sm);
        }
        .app-platform-btn:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            color: var(--primary-dark);
        }
        .app-platform-btn .platform-icon {
            font-size: 20px;
            color: var(--primary);
        }

        /* ========== Testimonials ========== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }
        .testimonial-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .testimonial-card .quote-icon {
            color: var(--primary-light);
            font-size: 24px;
            margin-bottom: 10px;
        }
        .testimonial-card p {
            font-size: 13.5px;
            color: var(--text);
            line-height: 1.75;
            margin-bottom: 14px;
            font-style: italic;
        }
        .testimonial-card .testimonial-user {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
        }
        .testimonial-card .testimonial-user .user-avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 600;
            flex-shrink: 0;
        }
        .testimonial-card .testimonial-user .user-name {
            font-weight: 600;
            color: var(--secondary);
        }
        .testimonial-card .testimonial-user .user-role {
            font-size: 11px;
            color: var(--text-secondary);
        }

        /* ========== Audience ========== */
        .audience-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 18px;
        }
        .audience-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .audience-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .audience-card .audience-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin: 0 auto 12px;
        }
        .audience-card h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 8px;
        }
        .audience-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== 18+ Warning ========== */
        .compliance-banner {
            background: var(--warning-light);
            border: 1.5px solid var(--warning);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
        }
        .compliance-banner .compliance-icon {
            font-size: 24px;
            color: var(--warning);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .compliance-banner h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--warning);
            margin-bottom: 6px;
        }
        .compliance-banner p {
            font-size: 13.5px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .compliance-banner .compliance-tag {
            display: inline-block;
            background: var(--warning);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.05em;
            margin-bottom: 8px;
        }

        /* ========== FAQ ========== */
        .faq-custom .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--surface);
            box-shadow: var(--shadow-sm);
        }
        .faq-custom .accordion-button {
            font-size: 15px;
            font-weight: 600;
            color: var(--secondary);
            padding: 18px 20px;
            background: var(--surface);
            border: none;
            box-shadow: none;
            transition: all var(--transition);
        }
        .faq-custom .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary-dark);
            box-shadow: none;
        }
        .faq-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(59,124,158,0.15);
            border: none;
        }
        .faq-custom .accordion-body {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding: 16px 20px 20px;
        }

        /* ========== CTA Section ========== */
        .cta-final-section {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--secondary-light) 100%);
            border-radius: var(--radius-lg);
            padding: 44px 32px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-final-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
        }
        .cta-final-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
        }
        .cta-final-section h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-final-section p {
            font-size: 15px;
            color: rgba(255,255,255,0.8);
            line-height: 1.8;
            margin-bottom: 24px;
            max-width: 560px;
            position: relative;
            z-index: 1;
        }
        .cta-final-section .cta-form-row {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-final-section .cta-input {
            flex: 1;
            min-width: 200px;
            padding: 13px 18px;
            border: 1.5px solid rgba(255,255,255,0.25);
            border-radius: var(--radius-pill);
            background: rgba(255,255,255,0.1);
            color: #fff;
            font-size: 14px;
            transition: all var(--transition);
        }
        .cta-final-section .cta-input:focus {
            outline: none;
            border-color: var(--accent);
            background: rgba(255,255,255,0.18);
            box-shadow: 0 0 0 4px rgba(28,163,170,0.2);
        }
        .cta-final-section .cta-input::placeholder {
            color: rgba(255,255,255,0.5);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.75);
            padding: 56px 0 28px;
            margin-top: 60px;
        }
        .site-footer .footer-brand {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .site-footer .footer-desc {
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            line-height: 1.7;
            max-width: 300px;
            margin-bottom: 16px;
        }
        .site-footer .footer-col-title {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: rgba(255,255,255,0.65);
            font-size: 13px;
            transition: color var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            margin-top: 40px;
            padding-top: 20px;
            font-size: 12px;
            color: rgba(255,255,255,0.5);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
        }
        .site-footer .footer-warning-tag {
            display: inline-block;
            background: var(--warning);
            color: #fff;
            font-size: 10px;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 4px;
            letter-spacing: 0.05em;
            margin-bottom: 10px;
        }

        /* ========== Responsive ========== */
        @media (max-width: 991px) {
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-bg-image {
                width: 300px;
                opacity: 0.25;
                right: -40px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            .site-section {
                padding: 48px 0;
            }
            .cta-final-section {
                padding: 36px 24px;
            }
        }

        @media (max-width: 767px) {
            .site-header-top {
                flex-direction: column;
                align-items: stretch;
                gap: 10px;
                padding: 12px 0;
            }
            .brand-logo {
                justify-content: center;
            }
            .header-search {
                max-width: 100%;
            }
            .header-actions {
                justify-content: center;
                flex-wrap: wrap;
            }
            .channel-tabs {
                padding: 6px 0;
                gap: 2px;
            }
            .channel-tab {
                padding: 7px 14px;
                font-size: 13px;
            }
            .hero-creator {
                padding: 40px 0 36px;
            }
            .hero-creator-profile {
                gap: 14px;
                margin-bottom: 20px;
            }
            .hero-avatar {
                width: 64px;
                height: 64px;
                border-radius: 16px;
                font-size: 24px;
            }
            .hero-nickname {
                font-size: 20px;
            }
            .hero-content h1 {
                font-size: 24px;
            }
            .hero-content .hero-desc {
                font-size: 14px;
                line-height: 1.7;
            }
            .hero-stats-badges {
                gap: 8px;
            }
            .hero-stat-badge {
                padding: 8px 12px;
                font-size: 12px;
            }
            .hero-stat-badge .stat-num {
                font-size: 16px;
            }
            .hero-bg-image {
                display: none;
            }
            .content-card-row {
                grid-template-columns: 1fr;
            }
            .entry-matrix-grid {
                grid-template-columns: 1fr;
            }
            .stats-dashboard {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stats-item .stats-num {
                font-size: 26px;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .audience-grid {
                grid-template-columns: 1fr;
            }
            .device-guide-grid {
                grid-template-columns: 1fr;
            }
            .app-platforms {
                flex-direction: column;
                align-items: stretch;
            }
            .app-platform-btn {
                justify-content: center;
            }
            .cta-final-section {
                padding: 28px 18px;
            }
            .cta-final-section h2 {
                font-size: 22px;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container-main {
                padding-left: 14px;
                padding-right: 14px;
            }
            .hero-content h1 {
                font-size: 21px;
            }
            .section-header h2 {
                font-size: 20px;
            }
            .stats-dashboard {
                grid-template-columns: 1fr 1fr;
            }
            .stats-item {
                padding: 16px 12px;
            }
            .stats-item .stats-num {
                font-size: 22px;
            }
            .btn-lg {
                padding: 11px 22px;
                font-size: 14px;
            }
            .faq-custom .accordion-button {
                font-size: 14px;
                padding: 15px 16px;
            }
        }

        /* Utility */
        .text-tabular {
            font-variant-numeric: tabular-nums;
        }
        .gap-20 {
            gap: 20px;
        }
        .mt-0 { margin-top: 0 !important; }
        .mb-0 { margin-bottom: 0 !important; }
        .fw-bold { font-weight: 700; }
        .text-accent { color: var(--accent) !important; }
        .text-primary { color: var(--primary) !important; }
        .badge-soft {
            display: inline-block;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            font-size: 11px;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .badge-soft.bg-primary-soft {
            background: var(--primary-light);
            color: var(--primary);
        }
        .badge-soft.bg-accent-soft {
            background: var(--accent-light);
            color: var(--accent);
        }
        .badge-soft.bg-warning-soft {
            background: var(--warning-light);
            color: var(--warning);
        }

/* roulang page: article */
:root {
  --primary: #3B7C9E;
  --primary-dark: #2E617C;
  --primary-light: #E8F1F5;
  --secondary: #16313F;
  --secondary-light: #1F4255;
  --bg: #F5F8FA;
  --surface: #FFFFFF;
  --border: #D9E2EA;
  --text: #182630;
  --text-secondary: #6B7A89;
  --accent: #1CA3AA;
  --accent-light: #E4F4F5;
  --warning: #C2453A;
  --warning-light: #FBE9E7;
  --shadow-sm: 0 2px 8px rgba(30,45,60,0.05);
  --shadow-md: 0 8px 24px rgba(30,45,60,0.06);
  --shadow-lg: 0 16px 36px rgba(30,45,60,0.12);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--primary-dark);
}
a:focus-visible {
  outline: 3px solid rgba(59,124,158,0.35);
  outline-offset: 2px;
  border-radius: 4px;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}
.container-main {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
/* ========== Header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1040;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.site-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 0;
  gap: 16px;
  flex-wrap: wrap;
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand-logo:hover {
  color: var(--primary-dark);
}
.brand-logo .logo-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  flex-shrink: 0;
}
.brand-logo .logo-text {
  font-size: 18px;
  line-height: 1.3;
}
.brand-logo .logo-sub {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}
.header-search {
  flex: 1;
  max-width: 360px;
  min-width: 180px;
  position: relative;
}
.header-search input {
  width: 100%;
  padding: 10px 16px 10px 42px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.header-search input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(59,124,158,0.12);
  background: var(--surface);
}
.header-search .search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
  font-size: 14px;
  pointer-events: none;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  border: 1.5px solid transparent;
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
  line-height: 1.4;
}
.btn:focus-visible {
  outline: 3px solid rgba(59,124,158,0.35);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-secondary {
  background: var(--primary-light);
  color: var(--primary-dark);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: #DCEBF2;
  border-color: var(--primary);
  color: var(--primary-dark);
  transform: translateY(-1px);
}
.btn-sm {
  padding: 8px 16px;
  font-size: 12px;
}
.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}
.site-nav-channels {
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.channel-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 8px 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  -webkit-overflow-scrolling: touch;
}
.channel-tabs::-webkit-scrollbar {
  height: 4px;
}
.channel-tabs::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
.channel-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
  transition: all var(--transition);
  border: 1px solid transparent;
}
.channel-tab:hover {
  background: var(--bg);
  color: var(--primary-dark);
}
.channel-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.tab-icon {
  font-size: 13px;
}
/* ========== Article Breadcrumb ========== */
.article-breadcrumb {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 13px;
}
.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
}
.breadcrumb-list a {
  color: var(--primary);
}
.breadcrumb-list a:hover {
  color: var(--primary-dark);
}
.breadcrumb-sep {
  color: var(--border);
}
.breadcrumb-current {
  color: var(--text);
  font-weight: 500;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
/* ========== Article Hero ========== */
.article-hero {
  padding: 48px 0 32px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.article-category-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}
.article-h1 {
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
.article-summary {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 720px;
}
.article-meta-row {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-secondary);
}
.article-meta-row span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta-row i {
  color: var(--primary);
}
.article-cover-wrap {
  margin-top: 28px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.article-cover-wrap img {
  width: 100%;
  height: auto;
  aspect-ratio: 16/9;
  object-fit: cover;
}
/* ========== Article Body ========== */
.article-body-section {
  padding: 48px 0;
  background: var(--bg);
}
.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
}
.article-main-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 32px;
}
.article-content {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
  max-width: 720px;
}
.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin: 32px 0 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}
.article-content h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
  margin: 24px 0 12px;
}
.article-content p {
  margin-bottom: 16px;
}
.article-content ul,
.article-content ol {
  margin: 0 0 16px 20px;
  padding: 0;
}
.article-content li {
  margin-bottom: 8px;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  padding: 12px 20px;
  margin: 20px 0;
  background: var(--primary-light);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--secondary);
  font-size: 15px;
}
.article-content img {
  border-radius: var(--radius-md);
  margin: 20px 0;
  box-shadow: var(--shadow-md);
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-not-found {
  text-align: center;
  padding: 60px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.article-not-found h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 12px;
}
.article-not-found p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}
/* ========== Article Sidebar ========== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}
.sidebar-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.sidebar-link-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sidebar-link-list li {
  margin-bottom: 12px;
}
.sidebar-link-list li:last-child {
  margin-bottom: 0;
}
.sidebar-link-list a {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.sidebar-link-list a:hover {
  color: var(--primary-dark);
  translate: 2px;
}
.sidebar-link-list i {
  font-size: 12px;
  color: var(--primary);
}
/* ========== Related Section ========== */
.related-section {
  padding: 48px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.section-heading {
  font-size: 26px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 24px;
  letter-spacing: -0.01em;
}
.related-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
  height: 100%;
}
.related-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--primary);
}
.related-card-image {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.related-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}
.related-card:hover .related-card-image img {
  transform: scale(1.03);
}
.related-card-body {
  padding: 16px;
}
.related-card-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary-dark);
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 8px;
}
.related-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 8px;
}
.related-card-date {
  font-size: 13px;
  color: var(--text-secondary);
}
/* ========== CTA Section ========== */
.article-cta-section {
  padding: 48px 0;
  background: var(--bg);
}
.article-cta-box {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  text-align: center;
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.article-cta-box h2 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}
.article-cta-box p {
  font-size: 15px;
  margin-bottom: 24px;
  opacity: 0.9;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.article-cta-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
}
.article-cta-form input {
  flex: 1;
  min-width: 220px;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  border: none;
  background: rgba(255,255,255,0.15);
  color: #fff;
  font-size: 14px;
  outline: none;
}
.article-cta-form input::placeholder {
  color: rgba(255,255,255,0.7);
}
.article-cta-form .btn {
  background: #fff;
  color: var(--primary-dark);
  border: none;
}
.article-cta-form .btn:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
}
/* ========== FAQ Section ========== */
.article-faq-section {
  padding: 48px 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
}
.accordion-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-md) !important;
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.accordion-button {
  padding: 18px 20px;
  font-weight: 600;
  font-size: 15px;
  color: var(--text);
  background: var(--surface);
  border-radius: var(--radius-md) !important;
}
.accordion-button:not(.collapsed) {
  color: var(--primary-dark);
  background: var(--primary-light);
  box-shadow: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0 !important;
}
.accordion-button:focus {
  box-shadow: 0 0 0 3px rgba(59,124,158,0.2);
  border-color: var(--primary);
}
.accordion-body {
  padding: 18px 20px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}
/* ========== Footer ========== */
.site-footer {
  background: var(--secondary);
  color: rgba(255,255,255,0.85);
  padding: 56px 0 0;
}
.footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.footer-warning-tag {
  display: inline-block;
  background: var(--warning);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0;
}
.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: rgba(255,255,255,0.7);
  font-size: 14px;
  transition: all var(--transition);
}
.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  margin-top: 40px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.6);
}
/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }
  .article-sidebar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
}
@media (max-width: 768px) {
  .site-header-top {
    flex-wrap: wrap;
  }
  .header-search {
    order: 3;
    max-width: none;
    width: 100%;
  }
  .header-actions {
    gap: 6px;
  }
  .article-h1 {
    font-size: 26px;
  }
  .article-main-card {
    padding: 20px;
  }
  .article-cta-box {
    padding: 32px 20px;
  }
  .article-cta-box h2 {
    font-size: 22px;
  }
  .channel-tabs {
    gap: 4px;
  }
  .channel-tab {
    padding: 6px 12px;
    font-size: 12px;
  }
}
@media (max-width: 520px) {
  .brand-logo .logo-text {
    font-size: 15px;
  }
  .brand-logo .logo-badge {
    width: 34px;
    height: 34px;
    font-size: 15px;
  }
  .brand-logo .logo-sub {
    font-size: 10px;
  }
  .article-h1 {
    font-size: 22px;
  }
  .article-summary {
    font-size: 15px;
  }
  .article-meta-row {
    gap: 12px;
    font-size: 13px;
  }
  .article-cta-form input {
    min-width: 100%;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
}

/* roulang page: category1 */
:root {
            --primary: #3B7C9E;
            --primary-dark: #2E617C;
            --primary-light: #E8F1F5;
            --secondary: #16313F;
            --secondary-light: #1F4255;
            --bg: #F5F8FA;
            --surface: #FFFFFF;
            --border: #D9E2EA;
            --text: #182630;
            --text-secondary: #6B7A89;
            --accent: #1CA3AA;
            --accent-light: #E4F4F5;
            --warning: #C2453A;
            --warning-light: #FBE9E7;
            --shadow-sm: 0 2px 8px rgba(30,45,60,0.05);
            --shadow-md: 0 8px 24px rgba(30,45,60,0.06);
            --shadow-lg: 0 16px 36px rgba(30,45,60,0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }

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

        a:focus-visible {
            outline: 3px solid rgba(59,124,158,0.35);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        .container-main {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        @media (min-width: 768px) {
            .container-main {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        @media (min-width: 1024px) {
            .container-main {
                padding-left: 40px;
                padding-right: 40px;
            }
        }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }

        .site-header-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            gap: 16px;
            flex-wrap: wrap;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--secondary);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .brand-logo:hover {
            color: var(--primary-dark);
        }

        .brand-logo .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .brand-logo .logo-text {
            font-size: 18px;
            line-height: 1.3;
        }

        .brand-logo .logo-sub {
            display: block;
            font-size: 11px;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.04em;
        }

        .header-search {
            flex: 1;
            max-width: 360px;
            min-width: 180px;
            position: relative;
        }

        .header-search input {
            width: 100%;
            padding: 10px 16px 10px 42px;
            border: 1.5px solid var(--border);
            border-radius: var(--radius-pill);
            background: var(--bg);
            color: var(--text);
            font-size: 14px;
            transition: border-color var(--transition), box-shadow var(--transition);
        }

        .header-search input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(59,124,158,0.12);
            background: var(--surface);
        }

        .header-search .search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-secondary);
            font-size: 14px;
            pointer-events: none;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 14px;
            padding: 10px 22px;
            border-radius: var(--radius-pill);
            border: 1.5px solid transparent;
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
            text-align: center;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(59,124,158,0.35);
            outline-offset: 2px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

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

        .btn-secondary {
            background: var(--surface);
            color: var(--primary);
            border-color: var(--border);
        }

        .btn-secondary:hover {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
        }

        .site-nav-channels {
            border-top: 1px solid var(--border);
            background: var(--surface);
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }

        .site-nav-channels::-webkit-scrollbar {
            display: none;
        }

        .channel-tabs {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 10px 0;
            min-width: max-content;
        }

        .channel-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            white-space: nowrap;
            transition: all var(--transition);
        }

        .channel-tab:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
        }

        .channel-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }

        .channel-tab .tab-icon {
            font-size: 14px;
        }

        /* ========== Main General ========== */
        main {
            display: block;
            background: var(--bg);
        }

        section {
            padding: 64px 0;
        }

        @media (max-width: 768px) {
            section {
                padding: 40px 0;
            }
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 16px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        @media (min-width: 768px) {
            .section-title {
                font-size: 32px;
            }
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            transition: all var(--transition);
        }

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

        .badge-18 {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--warning);
            color: #fff;
            font-weight: 700;
            font-size: 12px;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.03em;
        }

        .text-primary {
            color: var(--primary) !important;
        }

        .text-secondary {
            color: var(--text-secondary) !important;
        }

        .bg-primary-light {
            background: var(--primary-light);
        }

        .bg-accent-light {
            background: var(--accent-light);
        }

        .rounded-md {
            border-radius: var(--radius-md);
        }

        .rounded-lg {
            border-radius: var(--radius-lg);
        }

        /* ========== Category Hero ========== */
        .category-hero {
            padding: 48px 0 32px;
            background: linear-gradient(135deg, var(--surface) 0%, var(--primary-light) 100%);
            border-bottom: 1px solid var(--border);
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

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

        .breadcrumb-custom .separator {
            color: var(--border);
        }

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

        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--secondary);
            line-height: 1.3;
            margin-bottom: 12px;
        }

        @media (min-width: 768px) {
            .category-hero h1 {
                font-size: 38px;
            }
        }

        .category-hero .lead {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 760px;
            line-height: 1.8;
        }

        .category-hero .hero-stats-row {
            display: flex;
            gap: 24px;
            margin-top: 24px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--secondary);
            font-weight: 500;
        }

        .hero-stat-item i {
            color: var(--primary);
            font-size: 16px;
        }

        /* ========== Filter & Intro ========== */
        .category-filter-intro {
            background: var(--surface);
            border-bottom: 1px solid var(--border);
            padding: 24px 0;
        }

        .filter-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
        }

        .filter-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-pill);
            background: var(--bg);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 14px;
            transition: all var(--transition);
            cursor: default;
        }

        .filter-pill.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: var(--shadow-sm);
        }

        .filter-pill i {
            font-size: 13px;
        }

        .intro-text {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-top: 16px;
        }

        /* ========== Card Grid ========== */
        .category-card-grid {
            background: var(--bg);
        }

        .vr-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .vr-card .card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--primary-light);
        }

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

        .vr-card .card-badge {
            position: absolute;
            top: 12px;
            left: 12px;
        }

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

        .vr-card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .vr-card .card-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }

        .vr-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-secondary);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }

        .vr-card .card-meta .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            font-weight: 600;
        }

        .vr-card .card-meta .time {
            white-space: nowrap;
        }

        .link-more {
            margin-top: 24px;
            text-align: center;
        }

        /* ========== Scenes ========== */
        .category-scenes {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .scene-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            height: 100%;
            transition: all var(--transition);
        }

        .scene-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .scene-card .icon-circle {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 20px;
            margin-bottom: 16px;
        }

        .scene-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .scene-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== Data Stats ========== */
        .category-data-stats {
            background: var(--secondary);
            color: #fff;
        }

        .stats-row {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
        }

        .stat-block {
            text-align: center;
            min-width: 140px;
            flex: 1;
            max-width: 220px;
        }

        .stat-number {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.1;
            font-variant-numeric: tabular-nums;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: rgba(255,255,255,0.75);
            letter-spacing: 0.03em;
        }

        .stat-icon {
            font-size: 24px;
            margin-bottom: 12px;
            color: var(--accent);
        }

        /* ========== Device Guide ========== */
        .category-device-guide {
            background: var(--bg);
        }

        .guide-step {
            display: flex;
            gap: 16px;
            margin-bottom: 24px;
        }

        .guide-step .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            flex-shrink: 0;
        }

        .guide-step .step-content {
            flex: 1;
        }

        .guide-step .step-content h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 4px;
        }

        .guide-step .step-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== FAQ ========== */
        .category-faq {
            background: var(--surface);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .accordion-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--surface);
            box-shadow: var(--shadow-sm);
        }

        .accordion-button {
            background: var(--surface);
            color: var(--secondary);
            font-weight: 600;
            font-size: 16px;
            padding: 18px 20px;
            border-radius: var(--radius-md) !important;
        }

        .accordion-button:not(.collapsed) {
            background: var(--primary-light);
            color: var(--primary-dark);
            box-shadow: none;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(59,124,158,0.2);
            border-color: var(--primary);
        }

        .accordion-body {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding: 0 20px 20px;
        }

        /* ========== CTA ========== */
        .category-cta {
            background: linear-gradient(135deg, var(--primary-light) 0%, var(--surface) 100%);
            padding: 64px 0;
        }

        .cta-panel {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            box-shadow: var(--shadow-md);
            text-align: center;
        }

        .cta-panel h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 12px;
        }

        .cta-panel p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }

        .cta-panel .btn-lg {
            padding: 14px 32px;
            font-size: 16px;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--secondary);
            color: #fff;
            padding: 56px 0 32px;
            font-size: 14px;
        }

        .site-footer a {
            color: rgba(255,255,255,0.8);
            transition: color var(--transition);
        }

        .site-footer a:hover {
            color: #fff;
        }

        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .footer-warning-tag {
            display: inline-block;
            background: var(--warning);
            color: #fff;
            font-size: 12px;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.03em;
            margin-bottom: 12px;
        }

        .footer-desc {
            color: rgba(255,255,255,0.7);
            line-height: 1.8;
            margin-bottom: 0;
        }

        .footer-col-title {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.15);
            font-size: 13px;
            color: rgba(255,255,255,0.6);
        }

        /* ========== Responsive ========== */
        @media (max-width: 991px) {
            .site-header-top {
                flex-wrap: wrap;
            }

            .header-search {
                order: 3;
                flex-basis: 100%;
                max-width: 100%;
            }

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

        @media (max-width: 767px) {
            .section-title {
                font-size: 26px;
            }

            .site-header-top {
                gap: 10px;
            }

            .brand-logo .logo-text {
                font-size: 16px;
            }

            .brand-logo .logo-sub {
                font-size: 10px;
            }

            .channel-tabs {
                gap: 2px;
            }

            .channel-tab {
                padding: 6px 12px;
                font-size: 13px;
            }

            .category-hero h1 {
                font-size: 28px;
            }

            .stats-row {
                gap: 16px;
            }

            .stat-number {
                font-size: 32px;
            }

            .cta-panel {
                padding: 28px 20px;
            }
        }

        @media (max-width: 520px) {
            .header-actions .btn span {
                display: none;
            }

            .header-actions .btn i {
                font-size: 16px;
            }

            .header-actions .btn {
                padding: 8px 12px;
            }

            .site-header-top {
                padding: 10px 0;
            }

            .brand-logo .logo-badge {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }

            .brand-logo .logo-text {
                font-size: 14px;
            }

            .category-hero {
                padding: 32px 0 24px;
            }

            .hero-stat-item {
                font-size: 13px;
            }

            .vr-card .card-title {
                font-size: 15px;
            }

            .guide-step {
                flex-direction: column;
                gap: 8px;
            }

            .guide-step .step-number {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
        }

/* 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}