/* roulang page: index */
*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #8B5CF6;
            --secondary: #2DD4BF;
            --ink: #09090B;
            --surface: #18181B;
            --border: #27272A;
            --text: #FAFAFA;
            --muted: #A1A1AA;
            --weak: #71717A;
            --radius: 1rem;
            --shadow: 0 8px 40px rgba(139, 92, 246, 0.18);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--ink);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            padding-bottom: 80px;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        img {
            background-color: var(--surface);
        }
        .container-custom {
            max-width: 80rem;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width:640px) {
            .container-custom {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width:1024px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background-color: var(--primary);
            color: #fff;
            border-radius: 9999px;
            padding: 0.85rem 2rem;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.25s ease;
            box-shadow: 0 4px 20px rgba(139, 92, 246, 0.25);
        }
        .btn-primary:hover {
            background-color: #9d71f8;
            transform: scale(1.02);
            box-shadow: 0 6px 28px rgba(139, 92, 246, 0.35);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--text);
            border-radius: 9999px;
            padding: 0.85rem 2rem;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.25s ease;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(139, 92, 246, 0.06);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            border-radius: 9999px;
            padding: 0.2rem 0.7rem;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.85);
        }
        .badge-secondary {
            background: rgba(45, 212, 191, 0.14);
            color: var(--secondary);
        }
        .nav-link {
            position: relative;
            padding: 0.5rem 0.75rem;
            font-size: 0.92rem;
            color: var(--muted);
            transition: color 0.2s;
            border-radius: 0.5rem;
        }
        .nav-link:hover {
            color: var(--text);
        }
        .nav-link.active {
            color: var(--text);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0.75rem;
            right: 0.75rem;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }
        .text-glow {
            text-shadow: 0 0 40px rgba(139, 92, 246, 0.35);
        }
        .card-hover {
            transition: all 0.3s ease;
        }
        .card-hover:hover {
            border-color: rgba(139, 92, 246, 0.4);
            box-shadow: var(--shadow);
        }
        .img-zoom {
            overflow: hidden;
        }
        .img-zoom img {
            transition: transform 0.4s ease;
        }
        .card-hover:hover .img-zoom img {
            transform: scale(1.05);
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        details {
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        details:last-child {
            border-bottom: none;
        }
        details summary {
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            padding: 1.4rem 0.25rem;
            font-weight: 600;
            transition: color 0.2s;
            outline: none;
        }
        details summary:hover,
        details[open] summary {
            color: var(--primary);
        }
        details summary .icon-faq {
            position: relative;
            width: 1.25rem;
            height: 1.25rem;
            flex-shrink: 0;
        }
        details summary .icon-faq::before,
        details summary .icon-faq::after {
            content: "";
            position: absolute;
            background: currentColor;
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        details summary .icon-faq::before {
            width: 1.25rem;
            height: 2px;
            top: 0.6rem;
            left: 0;
        }
        details summary .icon-faq::after {
            width: 2px;
            height: 1.25rem;
            left: 0.6rem;
            top: 0;
        }
        details[open] summary .icon-faq::after {
            transform: scaleY(0);
        }
        details .faq-answer {
            padding: 0 0.25rem 1.4rem;
            color: var(--muted);
            font-size: 0.95rem;
        }
        .fixed-bar {
            transition: transform 0.35s ease, opacity 0.35s ease;
        }
        .fixed-bar.hidden {
            transform: translateY(100%);
            opacity: 0;
            pointer-events: none;
        }
        .footer-link {
            color: var(--muted);
            transition: color 0.2s;
            font-size: 0.9rem;
        }
        .footer-link:hover {
            color: var(--primary);
        }
        .filter-chip {
            display: inline-flex;
            align-items: center;
            border-radius: 9999px;
            padding: 0.4rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.2s;
            cursor: pointer;
        }
        .filter-chip:hover {
            color: var(--text);
            border-color: rgba(139, 92, 246, 0.5);
        }
        .filter-chip.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
        }
        .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 2.4rem;
            height: 2.4rem;
            border-radius: 0.75rem;
            font-size: 0.9rem;
            color: var(--muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.2s;
            padding: 0 0.6rem;
        }
        .page-btn:hover {
            color: var(--text);
            border-color: rgba(139, 92, 246, 0.5);
        }
        .page-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .page-btn.disabled {
            opacity: 0.4;
            cursor: not-allowed;
            pointer-events: none;
        }
        @media (max-width:640px) {
            body {
                padding-bottom: 72px;
            }
        }
        @media (max-width:640px) {
            .nav-desktop {
                display: none;
            }
        }
        @media (min-width:641px) {
            .nav-mobile {
                display: none !important;
            }
        }
        .hero-overlay {
            background: linear-gradient(to top right, rgba(9, 9, 11, 0.85), rgba(9, 9, 11, 0.5));
        }
        .section-padding {
            padding-top: 4rem;
            padding-bottom: 4rem;
        }
        @media (min-width:768px) {
            .section-padding {
                padding-top: 6rem;
                padding-bottom: 6rem;
            }
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text);
            line-height: 1.1;
        }
        @media (min-width:768px) {
            .stat-number {
                font-size: 3rem;
            }
        }
        .heading-section {
            font-size: 1.8rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }
        @media (min-width:768px) {
            .heading-section {
                font-size: 2.25rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #8B5CF6;
            --secondary: #2DD4BF;
            --ink: #09090B;
            --surface: #18181B;
            --border: #27272A;
            --text: #FAFAFA;
            --muted: #A1A1AA;
            --weak: #71717A;
            --radius: 1rem;
            --shadow: 0 8px 40px rgba(139, 92, 246, 0.18);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--ink);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            padding-bottom: 72px;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
            background-color: var(--surface);
        }
        button {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
        }
        .container-custom {
            max-width: 80rem;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }
        @media (min-width: 640px) {
            .container-custom {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background-color: var(--primary);
            color: #fff;
            border-radius: 9999px;
            padding: 0.85rem 2rem;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all 0.25s ease;
            box-shadow: 0 4px 20px rgba(139, 92, 246, 0.25);
        }
        .btn-primary:hover {
            background-color: #9d71f8;
            transform: scale(1.02);
            box-shadow: 0 6px 28px rgba(139, 92, 246, 0.35);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-primary:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.4);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.18);
            color: var(--text);
            border-radius: 9999px;
            padding: 0.85rem 2rem;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.25s ease;
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(139, 92, 246, 0.06);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            border-radius: 9999px;
            padding: 0.2rem 0.7rem;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.85);
        }
        .badge-secondary {
            background: rgba(45, 212, 191, 0.14);
            color: var(--secondary);
        }
        .nav-link {
            position: relative;
            padding: 0.5rem 0.75rem;
            font-size: 0.92rem;
            color: var(--muted);
            transition: color 0.2s;
            border-radius: 0.5rem;
        }
        .nav-link:hover {
            color: var(--text);
        }
        .nav-link.active {
            color: var(--text);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 0.75rem;
            right: 0.75rem;
            bottom: -2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }
        .card-hover {
            transition: all 0.3s ease;
        }
        .card-hover:hover {
            border-color: rgba(139, 92, 246, 0.4);
            box-shadow: var(--shadow);
        }
        .img-zoom {
            overflow: hidden;
        }
        .img-zoom img {
            transition: transform 0.4s ease;
        }
        .card-hover:hover .img-zoom img {
            transform: scale(1.05);
        }
        .footer-link {
            color: var(--muted);
            transition: color 0.2s;
            font-size: 0.9rem;
        }
        .footer-link:hover {
            color: var(--primary);
        }
        .filter-chip {
            display: inline-flex;
            align-items: center;
            border-radius: 9999px;
            padding: 0.4rem 1.1rem;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.2s;
            cursor: pointer;
            white-space: nowrap;
        }
        .filter-chip:hover {
            color: var(--text);
            border-color: rgba(139, 92, 246, 0.5);
        }
        .filter-chip.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
        }
        .page-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 2.4rem;
            height: 2.4rem;
            border-radius: 0.75rem;
            font-size: 0.9rem;
            color: var(--muted);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.2s;
            padding: 0 0.6rem;
        }
        .page-btn:hover {
            color: var(--text);
            border-color: rgba(139, 92, 246, 0.5);
        }
        .page-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .page-btn.disabled {
            opacity: 0.4;
            cursor: not-allowed;
            pointer-events: none;
        }
        .select-sort {
            appearance: none;
            background-color: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 0.75rem;
            padding: 0.45rem 2.2rem 0.45rem 1rem;
            font-size: 0.85rem;
            color: var(--muted);
            cursor: pointer;
            transition: all 0.2s;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12' fill='none' stroke='%23A1A1AA' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 0.8rem center;
        }
        .select-sort:hover,
        .select-sort:focus {
            border-color: rgba(139, 92, 246, 0.5);
            color: var(--text);
            outline: none;
        }
        .category-breadcrumb a {
            color: var(--muted);
            transition: color 0.2s;
        }
        .category-breadcrumb a:hover {
            color: var(--primary);
        }
        .category-breadcrumb .sep {
            color: var(--weak);
            margin: 0 0.4rem;
        }
        .category-breadcrumb .current {
            color: var(--text);
            font-weight: 500;
        }
        .category-header {
            position: relative;
            background: linear-gradient(135deg, rgba(24, 24, 27, 0.6), rgba(9, 9, 11, 0.9));
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .category-header::before {
            content: "";
            position: absolute;
            top: -40%;
            right: 10%;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.12) 0%, transparent 65%);
            border-radius: 50%;
            pointer-events: none;
        }
        .breadcrumb-wrap {
            position: relative;
            z-index: 1;
        }
        .category-intro {
            max-width: 46rem;
            color: var(--muted);
            font-size: 0.98rem;
            line-height: 1.8;
        }
        .category-card {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.3s ease;
            border-radius: 1rem;
            overflow: hidden;
        }
        .category-card:hover {
            border-color: rgba(139, 92, 246, 0.4);
            box-shadow: var(--shadow);
        }
        .category-card .media {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background-color: var(--surface);
        }
        .category-card .media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }
        .category-card:hover .media img {
            transform: scale(1.05);
        }
        .category-card .media::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(9, 9, 11, 0.35), transparent 45%);
            pointer-events: none;
        }
        .category-card .card-title {
            font-size: 1.12rem;
            font-weight: 700;
            color: var(--text);
            transition: color 0.2s;
            line-height: 1.45;
        }
        .category-card:hover .card-title {
            color: var(--primary);
        }
        .category-card .card-desc {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.88rem;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .category-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            color: var(--primary);
            font-size: 0.88rem;
            font-weight: 500;
            transition: gap 0.2s;
        }
        .category-card:hover .card-link {
            gap: 0.55rem;
        }
        .category-card .card-link svg {
            transition: transform 0.2s;
        }
        .category-card:hover .card-link svg {
            transform: translateX(2px);
        }
        .seo-text-block {
            max-width: 46rem;
            margin-left: auto;
            margin-right: auto;
            color: var(--muted);
            font-size: 0.92rem;
            line-height: 1.9;
        }
        .seo-text-block strong {
            color: var(--text);
            font-weight: 600;
        }
        .cta-band {
            position: relative;
            background: linear-gradient(135deg, rgba(139, 92, 246, 0.14), rgba(45, 212, 191, 0.05));
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: 1.5rem;
            overflow: hidden;
        }
        .cta-band::before {
            content: "";
            position: absolute;
            top: -80px;
            left: 50%;
            transform: translateX(-50%);
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.2), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 40;
            background: rgba(24, 24, 27, 0.96);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            transition: transform 0.3s ease;
        }
        .bottom-bar.hidden-bar {
            transform: translateY(100%);
        }
        details summary {
            list-style: none;
            cursor: pointer;
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        :focus-visible {
            outline: 2px solid rgba(139, 92, 246, 0.5);
            outline-offset: 2px;
        }
        @media (min-width: 768px) {
            .category-card .card-desc {
                -webkit-line-clamp: 2;
            }
        }