/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #7C3AED;
            --primary-dark: #5B21B6;
            --primary-light: #A78BFA;
            --primary-gradient: linear-gradient(135deg, #7C3AED 0%, #4C1D95 100%);
            --accent: #F59E0B;
            --accent-light: #FCD34D;
            --bg-page: #F8FAFC;
            --bg-card: #FFFFFF;
            --bg-dark: #1E1B4B;
            --text-primary: #1E293B;
            --text-secondary: #64748B;
            --text-light: #94A3B8;
            --text-white: #FFFFFF;
            --border: #E2E8F0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
            --transition: 0.3s ease;
            --max-width: 1200px;
            --gap: 20px;
            --space-section: 4rem;
            --font-title: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-page);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover, a:focus {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul, ol {
            list-style: none;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-title);
            line-height: 1.3;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
        }
        .logo {
            font-family: var(--font-title);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .logo i {
            color: var(--accent);
            font-size: 1.6rem;
        }
        .logo span {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.9;
        }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg-page);
            padding: 4px;
            border-radius: 40px;
            border: 1px solid var(--border);
        }
        .nav-tabs a {
            padding: 8px 20px;
            border-radius: 40px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-tabs a:hover {
            color: var(--primary);
            background: rgba(124,58,237,0.08);
        }
        .nav-tabs a.active {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 2px 8px rgba(124,58,237,0.3);
        }
        .nav-tabs a.active:hover {
            background: var(--primary-dark);
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-download {
            background: var(--primary-gradient);
            color: var(--text-white);
            border: none;
            padding: 10px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            border: 2px solid var(--accent);
            cursor: pointer;
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .btn-download:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(124,58,237,0.35);
            color: var(--text-white);
        }
        .btn-download:active {
            transform: scale(0.97);
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
        }
        .mobile-nav {
            display: none;
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 12px var(--gap);
        }
        .mobile-nav a {
            display: block;
            padding: 10px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            transition: all var(--transition);
        }
        .mobile-nav a:hover {
            background: rgba(124,58,237,0.08);
            color: var(--primary);
        }
        .mobile-nav a.active {
            background: var(--primary);
            color: var(--text-white);
        }

        /* ===== Hero ===== */
        .hero {
            background: var(--primary-gradient);
            padding: 3rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: center;
        }
        .hero-cover {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 12px 40px rgba(0,0,0,0.3);
            aspect-ratio: 4/3;
            background: rgba(255,255,255,0.05);
        }
        .hero-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .hero-content {
            color: var(--text-white);
        }
        .hero-content h1 {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 0.75rem;
            line-height: 1.2;
        }
        .hero-content .subtitle {
            font-size: 1.1rem;
            opacity: 0.9;
            margin-bottom: 1.5rem;
        }
        .countdown-box {
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(8px);
            border-radius: var(--radius);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            border: 1px solid rgba(255,255,255,0.15);
        }
        .countdown-label {
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 2px;
            opacity: 0.75;
            margin-bottom: 0.5rem;
        }
        .countdown-digits {
            display: flex;
            gap: 12px;
            align-items: center;
        }
        .countdown-digits .digit {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--accent);
            font-family: var(--font-title);
            line-height: 1;
            min-width: 60px;
            text-align: center;
        }
        .countdown-digits .separator {
            font-size: 2rem;
            color: rgba(255,255,255,0.4);
            font-weight: 300;
        }
        .countdown-digits .label {
            font-size: 0.7rem;
            color: rgba(255,255,255,0.6);
            text-align: center;
            display: block;
            margin-top: 2px;
        }
        .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 1.5rem;
        }
        .hero-tags .chip {
            background: rgba(255,255,255,0.12);
            border: 1px solid rgba(255,255,255,0.2);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .hero-tags .chip i {
            color: var(--accent);
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .btn-primary {
            background: var(--accent);
            color: #1E1B4B;
            border: none;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245,158,11,0.4);
            color: #1E1B4B;
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255,255,255,0.3);
            padding: 10px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-secondary:hover {
            border-color: var(--text-white);
            background: rgba(255,255,255,0.08);
            color: var(--text-white);
        }
        .btn-secondary:active {
            transform: scale(0.97);
        }

        /* ===== Section ===== */
        .section {
            padding: var(--space-section) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 2.5rem;
        }
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary-gradient);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-top: 12px;
            max-width: 620px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .card-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--bg-page);
        }
        .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.05);
        }
        .card-body {
            padding: 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body .tag {
            display: inline-block;
            background: rgba(124,58,237,0.1);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 8px;
            align-self: flex-start;
        }
        .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: var(--text-primary);
        }
        .card-body h3 a:hover {
            color: var(--primary);
        }
        .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            flex: 1;
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .card-body .meta {
            font-size: 0.8rem;
            color: var(--text-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid var(--border);
            padding-top: 10px;
            margin-top: auto;
        }

        /* ===== Game Recommend (Horizontal Scroll) ===== */
        .game-scroll {
            overflow-x: auto;
            display: flex;
            gap: 20px;
            padding: 8px 4px 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .game-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .game-scroll::-webkit-scrollbar-track {
            background: var(--border);
            border-radius: 10px;
        }
        .game-scroll::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 10px;
        }
        .game-card {
            min-width: 260px;
            max-width: 280px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 1.25rem;
            scroll-snap-align: start;
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .game-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .game-card .game-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .game-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .game-card .stars {
            color: var(--accent);
            font-size: 0.9rem;
            margin-bottom: 10px;
        }
        .game-card .stars span {
            color: var(--text-light);
            font-size: 0.8rem;
            margin-left: 6px;
        }
        .game-card .btn-sm {
            background: var(--primary);
            color: var(--text-white);
            border: none;
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition);
            width: 100%;
        }
        .game-card .btn-sm:hover {
            background: var(--primary-dark);
        }

        /* ===== Partners ===== */
        .partners-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 20px;
            align-items: center;
            justify-items: center;
        }
        .partner-logo {
            padding: 20px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            text-align: center;
            width: 100%;
            transition: all var(--transition);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-secondary);
            border: 1px solid var(--border);
        }
        .partner-logo i {
            font-size: 2rem;
            color: var(--primary-light);
            display: block;
            margin-bottom: 8px;
        }
        .partner-logo:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: var(--primary-light);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            margin-bottom: 12px;
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-title);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--primary);
            font-size: 1.1rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-gradient);
            padding: 4rem 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 1rem;
        }
        .cta-section p {
            color: rgba(255,255,255,0.85);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 2rem;
        }
        .cta-section .btn-primary {
            font-size: 1.1rem;
            padding: 14px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand .logo {
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer-brand .logo span {
            -webkit-text-fill-color: var(--text-white);
            background: none;
        }
        .footer-brand p {
            font-size: 0.9rem;
            opacity: 0.7;
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h5 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Empty State ===== */
        .empty-state {
            text-align: center;
            padding: 3rem 2rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .empty-state i {
            font-size: 3rem;
            color: var(--text-light);
            margin-bottom: 1rem;
        }
        .empty-state p {
            font-size: 1rem;
            color: var(--text-secondary);
        }

        /* ===== Responsive ===== */
        @media screen and (max-width: 64em) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .hero-cover {
                max-width: 500px;
                margin: 0 auto;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media screen and (max-width: 40em) {
            .header-inner {
                height: 64px;
            }
            .nav-tabs {
                display: none;
            }
            .header-cta .btn-download span {
                display: none;
            }
            .header-cta .btn-download i {
                margin: 0;
            }
            .header-cta .btn-download {
                padding: 10px 16px;
            }
            .hamburger {
                display: block;
            }
            .mobile-nav.open {
                display: block;
            }
            .hero {
                padding: 2rem 0;
            }
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .countdown-digits .digit {
                font-size: 2rem;
                min-width: 40px;
            }
            .section-title h2 {
                font-size: 1.5rem;
            }
            .section {
                padding: 2.5rem 0;
            }
            .game-card {
                min-width: 220px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .partners-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        @media screen and (min-width: 40.063em) and (max-width: 64em) {
            .nav-tabs a {
                padding: 6px 14px;
                font-size: 0.85rem;
            }
            .hero-content h1 {
                font-size: 2rem;
            }
            .card-body h3 {
                font-size: 1.1rem;
            }
        }

        /* ===== Helper ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-1 { gap: 1rem; }

        /* ===== Focus Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

/* roulang page: article */
:root {
            --primary: #7C3AED;
            --primary-dark: #5B21B6;
            --primary-light: #A78BFA;
            --primary-gradient: linear-gradient(135deg, #7C3AED 0%, #4C1D95 100%);
            --accent: #F59E0B;
            --accent-light: #FCD34D;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #1E1B4B;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #94A3B8;
            --border: #E2E8F0;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-hover: 0 8px 24px rgba(0,0,0,0.12);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-pill: 50px;
            --transition: 0.3s ease;
            --max-width: 1200px;
            --font: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --line-height: 1.8;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font);
            background: var(--bg-light);
            color: var(--text-dark);
            line-height: var(--line-height);
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        ul, ol { list-style: none; }

        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; width: 100%; }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.75rem 0;
            gap: 1rem;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-weight: 900;
            font-size: 1.5rem;
            color: var(--primary);
            white-space: nowrap;
            flex-shrink: 0;
        }
        .logo i { font-size: 1.6rem; color: var(--accent); }
        .logo span { background: var(--primary-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; }

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-tabs::-webkit-scrollbar { display: none; }

        .nav-tabs a {
            padding: 0.5rem 1.2rem;
            border-radius: var(--radius-pill);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-muted);
            background: transparent;
            white-space: nowrap;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .nav-tabs a:hover {
            color: var(--primary);
            background: rgba(124, 58, 237, 0.08);
        }
        .nav-tabs a.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
        }

        .header-cta {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .header-cta .btn-cta {
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 0.95rem;
            background: var(--primary-gradient);
            color: #fff;
            border: 2px solid var(--accent);
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }
        .header-cta .btn-cta:hover {
            transform: scale(1.03);
            box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35);
        }
        .header-cta .btn-cta i { margin-right: 0.4rem; }

        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 0.25rem;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            padding: 0.75rem 0;
        }
        .breadcrumb-bar .breadcrumb {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 0.3rem;
        }
        .breadcrumb-bar .breadcrumb a { color: var(--text-muted); }
        .breadcrumb-bar .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb-bar .breadcrumb .sep { margin: 0 0.3rem; color: var(--text-light); }
        .breadcrumb-bar .breadcrumb .current { color: var(--text-dark); font-weight: 500; }

        /* ===== 文章主体 ===== */
        .article-main {
            padding: 2.5rem 0 3rem;
        }
        .article-wrapper {
            max-width: 800px;
            margin: 0 auto;
        }

        .article-header {
            margin-bottom: 2rem;
        }
        .article-header h1 {
            font-size: 2rem;
            font-weight: 900;
            line-height: 1.3;
            color: var(--text-dark);
            margin-bottom: 0.75rem;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .article-meta .meta-item i { font-size: 0.85rem; }
        .article-meta .tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            border-radius: var(--radius-pill);
            background: rgba(124, 58, 237, 0.1);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* ===== 正文排版 ===== */
        .article-content {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 2rem;
            box-shadow: var(--shadow);
            margin-bottom: 2.5rem;
        }
        .article-content p {
            margin-bottom: 1.2rem;
            line-height: 1.8;
            color: var(--text-dark);
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2rem 0 1rem;
            padding-left: 0.8rem;
            border-left: 4px solid var(--primary);
            color: var(--text-dark);
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin: 1.5rem 0 0.8rem;
            padding-left: 0.6rem;
            border-left: 3px solid var(--accent);
            color: var(--text-dark);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary-light);
            background: rgba(124, 58, 237, 0.04);
            padding: 1rem 1.5rem;
            margin: 1.2rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            margin: 1.5rem auto;
            max-width: 100%;
        }
        .article-content ul, .article-content ol {
            margin: 0.8rem 0 1.2rem 1.5rem;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4rem;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4rem;
        }
        .article-content code {
            background: rgba(124, 58, 237, 0.08);
            padding: 0.2rem 0.5rem;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }
        .article-content pre {
            background: #1E293B;
            color: #E2E8F0;
            padding: 1.2rem;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 1.2rem 0;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.2rem 0;
        }
        .article-content table th, .article-content table td {
            border: 1px solid var(--border);
            padding: 0.6rem 1rem;
            text-align: left;
        }
        .article-content table th {
            background: rgba(124, 58, 237, 0.06);
            font-weight: 600;
        }

        .not-found {
            text-align: center;
            padding: 3rem 1.5rem;
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .not-found p {
            font-size: 1.2rem;
            color: var(--text-muted);
            margin-bottom: 1.5rem;
        }
        .not-found .btn {
            display: inline-block;
            padding: 0.7rem 2rem;
            border-radius: var(--radius-pill);
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            transition: var(--transition);
        }
        .not-found .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 1rem 0 2rem;
        }
        .related-section .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 0.6rem;
        }
        .related-section .section-title i {
            color: var(--accent);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .related-card .card-body {
            padding: 1.2rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1.4;
            color: var(--text-dark);
        }
        .related-card .card-body h3 a { color: inherit; }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 0.8rem;
        }
        .related-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.8rem;
            color: var(--text-light);
            padding-top: 0.6rem;
            border-top: 1px solid var(--border);
        }
        .related-card .card-footer .tag-sm {
            padding: 0.15rem 0.6rem;
            border-radius: var(--radius-pill);
            background: rgba(124, 58, 237, 0.08);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 500;
        }

        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.6rem 1.5rem;
            border-radius: var(--radius-pill);
            font-weight: 600;
            background: var(--bg-white);
            color: var(--primary);
            border: 1.5px solid var(--primary);
            transition: var(--transition);
            margin-bottom: 1.5rem;
        }
        .btn-back:hover {
            background: var(--primary);
            color: #fff;
            transform: translateX(-3px);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.85);
            padding: 3rem 0 1.5rem;
            margin-top: 2rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .site-footer .logo {
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .site-footer .logo i { color: var(--accent); }
        .site-footer .logo span { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.65);
            margin-bottom: 1rem;
        }
        .footer-social {
            display: flex;
            gap: 0.8rem;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            padding: 0.3rem 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 64em) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media screen and (max-width: 40em) {
            .header-inner {
                flex-wrap: wrap;
                padding: 0.6rem 0;
            }
            .mobile-menu-toggle {
                display: block;
                order: 3;
            }
            .nav-tabs {
                order: 4;
                width: 100%;
                display: none;
                flex-direction: column;
                background: var(--bg-white);
                border-top: 1px solid var(--border);
                padding: 0.8rem 0;
                gap: 0.3rem;
                overflow-x: visible;
            }
            .nav-tabs.open {
                display: flex;
            }
            .nav-tabs a {
                padding: 0.6rem 1rem;
                border-radius: var(--radius-sm);
                width: 100%;
                text-align: left;
            }
            .header-cta {
                order: 2;
                margin-left: auto;
            }
            .header-cta .btn-cta span { display: none; }
            .header-cta .btn-cta i { margin-right: 0; }

            .article-wrapper {
                padding: 0;
            }
            .article-header h1 {
                font-size: 1.5rem;
            }
            .article-content {
                padding: 1.2rem;
                border-radius: var(--radius-sm);
            }
            .article-content h2 {
                font-size: 1.25rem;
            }
            .article-content h3 {
                font-size: 1.05rem;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-col {
                text-align: center;
            }
            .footer-social {
                justify-content: center;
            }

            .breadcrumb-bar .breadcrumb {
                font-size: 0.8rem;
            }
        }

        @media screen and (min-width: 40.063em) and (max-width: 64em) {
            .nav-tabs a {
                padding: 0.4rem 1rem;
                font-size: 0.9rem;
            }
            .article-header h1 {
                font-size: 1.7rem;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #7C3AED;
            --primary-dark: #5B21B6;
            --primary-light: #A78BFA;
            --secondary: #F59E0B;
            --secondary-light: #FDE68A;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #1E1B4B;
            --text-dark: #1E293B;
            --text-muted: #64748B;
            --text-light: #94A3B8;
            --border-light: #E2E8F0;
            --border-focus: #7C3AED;
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 9999px;
            --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-card-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
            --shadow-hero: 0 8px 32px rgba(0, 0, 0, 0.25);
            --transition-base: 0.3s ease;
            --max-width: 1200px;
            --spacing-section: 4rem;
            --spacing-block: 2rem;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-dark);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-dark);
        }

        /* ===== Utility Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* ===== Navigation ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 0.75rem;
            padding-bottom: 0.75rem;
            flex-wrap: nowrap;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo i {
            font-size: 1.6rem;
            color: var(--secondary);
        }

        .logo span {
            color: var(--primary);
        }

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

        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            padding: 0 0.5rem;
            flex: 1;
            justify-content: center;
        }

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

        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            padding: 0.45rem 1.2rem;
            border-radius: var(--radius-pill);
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-muted);
            background: transparent;
            border: 1.5px solid transparent;
            transition: all var(--transition-base);
            white-space: nowrap;
            text-decoration: none;
        }

        .nav-tabs a:hover {
            color: var(--primary);
            background: rgba(124, 58, 237, 0.06);
            border-color: var(--primary-light);
        }

        .nav-tabs a.active {
            color: #fff;
            background: var(--primary);
            border-color: var(--primary);
            box-shadow: 0 2px 8px rgba(124, 58, 237, 0.3);
        }

        .nav-cta {
            flex-shrink: 0;
            margin-left: 0.75rem;
        }

        .nav-cta .btn-primary {
            background: var(--primary);
            color: #fff;
            border: 2px solid var(--secondary);
            padding: 0.5rem 1.4rem;
            border-radius: var(--radius-pill);
            font-weight: 700;
            font-size: 0.9rem;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            white-space: nowrap;
        }

        .nav-cta .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--secondary);
            transform: scale(1.02);
            box-shadow: 0 4px 12px rgba(124, 58, 237, 0.35);
        }

        .nav-cta .btn-primary:active {
            transform: scale(0.97);
        }

        /* Mobile hamburger – hidden by default */
        .hamburger-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            flex-shrink: 0;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            padding: 1.2rem 0 0.4rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.3rem;
        }

        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
        }

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

        .breadcrumb .sep {
            color: var(--text-light);
            margin: 0 0.2rem;
        }

        .breadcrumb .current {
            color: var(--text-dark);
            font-weight: 600;
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, #4C1D95 0%, #7C3AED 60%, #1E1B4B 100%);
            border-radius: var(--radius-card);
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
            margin: 1rem 0 2rem;
            box-shadow: var(--shadow-hero);
        }

        .category-hero .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            mix-blend-mode: overlay;
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            padding: 3rem 2.5rem;
            width: 100%;
            color: #fff;
        }

        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(245, 158, 11, 0.25);
            border: 1px solid var(--secondary);
            color: var(--secondary-light);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 0.25rem 1rem;
            border-radius: var(--radius-pill);
            margin-bottom: 1rem;
            backdrop-filter: blur(4px);
        }

        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .category-hero .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.9);
            max-width: 640px;
            margin-bottom: 1.8rem;
            line-height: 1.6;
        }

        .category-hero .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
            align-items: center;
        }

        .category-hero .btn-hero-primary {
            background: var(--secondary);
            color: #1E1B4B;
            font-weight: 700;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-btn);
            border: none;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.4);
        }

        .category-hero .btn-hero-primary:hover {
            background: #D97706;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
        }

        .category-hero .btn-hero-primary:active {
            transform: scale(0.97);
        }

        .category-hero .btn-hero-secondary {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.5);
            padding: 0.7rem 1.8rem;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            backdrop-filter: blur(4px);
        }

        .category-hero .btn-hero-secondary:hover {
            border-color: #fff;
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        /* ===== Section Headings ===== */
        .section-heading {
            text-align: center;
            margin-bottom: 2.5rem;
        }

        .section-heading h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-dark);
            position: relative;
            display: inline-block;
        }

        .section-heading h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
            margin: 0.6rem auto 0;
        }

        .section-heading p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0.8rem auto 0;
        }

        /* ===== Feature Cards (卖点) ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin: 2rem 0;
        }

        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 2rem 1.5rem;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            text-align: center;
            border: 1px solid var(--border-light);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary-light);
        }

        .feature-card .icon-wrap {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, rgba(124, 58, 237, 0.1), rgba(245, 158, 11, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.6rem;
            color: var(--primary);
        }

        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .feature-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== Guide Cards Grid ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin: 2rem 0;
        }

        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
        }

        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary-light);
        }

        .guide-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: var(--border-light);
        }

        .guide-card .card-body {
            padding: 1.2rem 1.2rem 1.4rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .guide-card .card-tag {
            display: inline-block;
            background: rgba(124, 58, 237, 0.1);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.8rem;
            border-radius: var(--radius-pill);
            margin-bottom: 0.5rem;
            align-self: flex-start;
        }

        .guide-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 0.4rem;
            color: var(--text-dark);
            line-height: 1.4;
        }

        .guide-card .card-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
        }

        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 0.8rem;
            font-size: 0.8rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 0.7rem;
        }

        .guide-card .card-meta i {
            margin-right: 0.25rem;
        }

        .guide-card .card-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
        }

        .guide-card .card-link:hover {
            color: var(--primary-dark);
        }

        /* ===== Process Steps ===== */
        .process-section {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 2.5rem 2rem;
            box-shadow: var(--shadow-card);
            margin: 2rem 0;
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-top: 1.5rem;
        }

        .process-step {
            text-align: center;
            position: relative;
        }

        .process-step .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 0.8rem;
            position: relative;
            z-index: 2;
        }

        .process-step .step-icon {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }

        .process-step h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.3rem;
        }

        .process-step p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .process-step::after {
            content: '→';
            position: absolute;
            right: -1rem;
            top: 1.2rem;
            font-size: 1.6rem;
            color: var(--primary-light);
            font-weight: 300;
        }

        .process-step:last-child::after {
            display: none;
        }

        /* ===== FAQ Accordion ===== */
        .faq-section {
            background: var(--bg-white);
            border-radius: var(--radius-card);
            padding: 2.5rem 2rem;
            box-shadow: var(--shadow-card);
            margin: 2rem 0;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 0.8rem 0;
        }

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            padding: 0.6rem 0;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text-dark);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: color var(--transition-base);
        }

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

        .faq-question .faq-icon {
            font-size: 1.1rem;
            color: var(--primary);
            transition: transform var(--transition-base);
            flex-shrink: 0;
            margin-left: 0.5rem;
        }

        .faq-question[aria-expanded="true"] .faq-icon {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 0.5rem 0 0;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-answer.open {
            max-height: 400px;
            padding: 0.6rem 0.5rem 0.8rem 0;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, #1E1B4B 0%, #4C1D95 100%);
            border-radius: var(--radius-card);
            padding: 3rem 2.5rem;
            text-align: center;
            color: #fff;
            margin: 2rem 0;
            box-shadow: var(--shadow-hero);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .cta-section .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.6rem;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 1.5rem;
            line-height: 1.6;
        }

        .cta-section .btn-cta {
            background: var(--secondary);
            color: #1E1B4B;
            font-weight: 700;
            padding: 0.9rem 2.8rem;
            border-radius: var(--radius-btn);
            border: none;
            font-size: 1.1rem;
            cursor: pointer;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            box-shadow: 0 4px 16px rgba(245, 158, 11, 0.4);
        }

        .cta-section .btn-cta:hover {
            background: #D97706;
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(245, 158, 11, 0.5);
        }

        .cta-section .btn-cta:active {
            transform: scale(0.97);
        }

        .cta-section .cta-stats {
            display: flex;
            justify-content: center;
            gap: 2.5rem;
            margin-top: 1.8rem;
            flex-wrap: wrap;
        }

        .cta-section .cta-stat-item {
            text-align: center;
        }

        .cta-section .cta-stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary);
        }

        .cta-section .cta-stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 0.15rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 3rem 0 1.5rem;
            margin-top: var(--spacing-section);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
        }

        .footer-brand .logo span {
            color: #fff;
        }

        .footer-brand .logo i {
            color: var(--secondary);
        }

        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 360px;
            margin-bottom: 1rem;
        }

        .footer-social {
            display: flex;
            gap: 0.8rem;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.1rem;
            transition: all var(--transition-base);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.8rem;
        }

        .footer-col a {
            display: block;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            padding: 0.3rem 0;
            transition: color var(--transition-base);
        }

        .footer-col a:hover {
            color: var(--secondary);
        }

        .footer-bottom {
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }

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

        /* ===== Responsive ===== */
        @media screen and (max-width: 64em) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }

            .footer-brand {
                grid-column: 1 / -1;
            }

            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-steps {
                grid-template-columns: repeat(2, 1fr);
            }

            .process-step::after {
                display: none;
            }

            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .category-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media screen and (max-width: 40em) {
            :root {
                --spacing-section: 2.5rem;
            }

            .site-header .container {
                flex-wrap: wrap;
            }

            .hamburger-toggle {
                display: block;
            }

            .nav-tabs {
                display: none;
                width: 100%;
                flex-direction: column;
                background: var(--bg-white);
                padding: 0.8rem 0;
                border-top: 1px solid var(--border-light);
                margin-top: 0.5rem;
                gap: 0.3rem;
            }

            .nav-tabs.open {
                display: flex;
            }

            .nav-tabs a {
                width: 100%;
                justify-content: center;
                padding: 0.6rem 1rem;
                border-radius: var(--radius-btn);
            }

            .nav-cta {
                margin-left: auto;
            }

            .nav-cta .btn-primary {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }

            .category-hero {
                min-height: 260px;
            }

            .category-hero .hero-content {
                padding: 1.8rem 1.2rem;
            }

            .category-hero h1 {
                font-size: 1.7rem;
            }

            .category-hero .hero-sub {
                font-size: 0.95rem;
            }

            .category-hero .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .category-hero .btn-hero-primary,
            .category-hero .btn-hero-secondary {
                justify-content: center;
                text-align: center;
            }

            .section-heading h2 {
                font-size: 1.5rem;
            }

            .feature-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }

            .guide-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }

            .process-steps {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }

            .process-step {
                display: flex;
                align-items: center;
                gap: 1rem;
                text-align: left;
            }

            .process-step .step-number {
                margin: 0;
                flex-shrink: 0;
            }

            .process-step .step-icon {
                display: none;
            }

            .faq-section {
                padding: 1.5rem 1rem;
            }

            .cta-section {
                padding: 2rem 1.2rem;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .cta-section .cta-stats {
                gap: 1.2rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .footer-brand p {
                max-width: 100%;
            }

            .breadcrumb {
                font-size: 0.78rem;
                padding: 0.8rem 0 0.2rem;
            }
        }

        @media screen and (min-width: 40.063em) and (max-width: 64em) {
            .category-hero h1 {
                font-size: 2rem;
            }

            .guide-card .card-title {
                font-size: 1rem;
            }
        }

        /* ===== Focus & Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== Spacing Helpers ===== */
        .section-pad {
            padding: var(--spacing-section) 0;
        }

        .mt-2 {
            margin-top: 2rem;
        }
        .mb-2 {
            margin-bottom: 2rem;
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #7C3AED;
            --primary-dark: #5B21B6;
            --primary-light: #A78BFA;
            --accent: #F59E0B;
            --accent-light: #FCD34D;
            --bg-light: #F8FAFC;
            --bg-white: #FFFFFF;
            --bg-dark: #1E1B4B;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-muted: #94A3B8;
            --border-color: #E2E8F0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
            --transition: 0.3s ease;
            --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --gap-section: 4rem;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.3; }

        /* ===== Container ===== */
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; width: 100%; }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 900;
            color: var(--primary);
            letter-spacing: 0.5px;
            flex-shrink: 0;
        }
        .logo i { font-size: 1.6rem; color: var(--accent); }
        .logo span { color: var(--text-dark); }
        .logo:hover { color: var(--primary); }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 6px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            flex: 1;
            justify-content: center;
            padding: 0 16px;
        }
        .nav-tabs::-webkit-scrollbar { display: none; }
        .nav-tabs a {
            display: inline-flex;
            align-items: center;
            padding: 8px 20px;
            border-radius: 999px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-body);
            background: transparent;
            border: 1px solid transparent;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-tabs a:hover { background: rgba(124, 58, 237, 0.08); color: var(--primary); border-color: transparent; }
        .nav-tabs a.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 2px 8px rgba(124, 58, 237, 0.3); }
        .nav-tabs a.active:hover { background: var(--primary-dark); color: #fff; }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .header-cta .btn-download {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 8px 22px;
            border-radius: 999px;
            font-weight: 700;
            font-size: 0.9rem;
            border: 2px solid var(--accent);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .header-cta .btn-download:hover { transform: scale(1.04); box-shadow: 0 4px 16px rgba(124, 58, 237, 0.35); color: #fff; }
        .header-cta .btn-download i { margin-right: 6px; color: var(--accent); }
        .mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text-dark); cursor: pointer; padding: 4px; }

        /* ===== 面包屑 ===== */
        .breadcrumb-area {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            padding: 14px 0;
        }
        .breadcrumb { font-size: 0.85rem; color: var(--text-muted); display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
        .breadcrumb a { color: var(--primary); }
        .breadcrumb a:hover { color: var(--primary-dark); }
        .breadcrumb .sep { color: var(--border-color); margin: 0 4px; }

        /* ===== 分类 Hero ===== */
        .category-hero {
            background: linear-gradient(135deg, #4C1D95 0%, #7C3AED 50%, #A78BFA 100%);
            padding: 3.5rem 0 3rem;
            position: relative;
            overflow: hidden;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .category-hero .container { position: relative; z-index: 1; text-align: center; }
        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 0.5rem;
            letter-spacing: 1px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.2);
        }
        .category-hero .subtitle {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.9);
            max-width: 620px;
            margin: 0 auto 1.2rem;
        }
        .category-hero .hero-stats {
            display: flex;
            justify-content: center;
            gap: 2.5rem;
            flex-wrap: wrap;
            margin-top: 1.5rem;
        }
        .category-hero .stat-item { text-align: center; color: #fff; }
        .category-hero .stat-item .num { font-size: 2rem; font-weight: 900; color: var(--accent); display: block; }
        .category-hero .stat-item .label { font-size: 0.85rem; opacity: 0.85; }

        /* ===== 内容区通用 ===== */
        .section { padding: var(--gap-section) 0; }
        .section-title {
            font-size: 1.8rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 0.5rem;
            color: var(--text-dark);
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 2.5rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 交替图文 ===== */
        .alt-block { padding: 3rem 0; }
        .alt-block:nth-child(even) { background: var(--bg-white); }
        .alt-grid {
            display: flex;
            align-items: center;
            gap: 3rem;
            flex-wrap: wrap;
        }
        .alt-grid.reverse { flex-direction: row-reverse; }
        .alt-grid .alt-img { flex: 1 1 380px; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-md); }
        .alt-grid .alt-img img { width: 100%; height: 300px; object-fit: cover; transition: transform 0.4s ease; }
        .alt-grid .alt-img:hover img { transform: scale(1.03); }
        .alt-grid .alt-text { flex: 1 1 380px; }
        .alt-grid .alt-text h3 { font-size: 1.6rem; margin-bottom: 0.8rem; color: var(--text-dark); }
        .alt-grid .alt-text p { color: var(--text-body); margin-bottom: 1.2rem; line-height: 1.8; }
        .alt-grid .alt-text .tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 1rem; }
        .alt-grid .alt-text .tag { background: rgba(124, 58, 237, 0.1); color: var(--primary); padding: 4px 14px; border-radius: 999px; font-size: 0.8rem; font-weight: 500; }
        .alt-grid .alt-text .btn-download-sm {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            padding: 8px 24px;
            border-radius: 999px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .alt-grid .alt-text .btn-download-sm:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); color: #fff; }
        .alt-grid .alt-text .btn-download-sm i { color: var(--accent); }

        /* ===== 卡片网格 ===== */
        .card-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .card-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .card-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .card-item .card-img { width: 100%; height: 180px; object-fit: cover; }
        .card-item .card-body { padding: 1.25rem 1.25rem 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .card-item .card-body h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.4rem; }
        .card-item .card-body .meta { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 0.5rem; display: flex; gap: 12px; }
        .card-item .card-body .meta i { margin-right: 4px; }
        .card-item .card-body .desc { font-size: 0.9rem; color: var(--text-body); line-height: 1.6; flex: 1; margin-bottom: 1rem; }
        .card-item .card-body .card-footer { display: flex; align-items: center; justify-content: space-between; }
        .card-item .card-body .card-footer .rating { color: var(--accent); font-size: 0.85rem; }
        .card-item .card-body .card-footer .rating i { margin-right: 2px; }
        .card-item .card-body .card-footer .download-link { color: var(--primary); font-weight: 600; font-size: 0.9rem; }
        .card-item .card-body .card-footer .download-link:hover { color: var(--primary-dark); }

        /* ===== 排行榜 ===== */
        .rank-list { max-width: 800px; margin: 0 auto; }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .rank-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }
        .rank-item .rank-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.1rem;
            background: var(--bg-light);
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .rank-item:nth-child(1) .rank-num { background: var(--accent); color: #fff; }
        .rank-item:nth-child(2) .rank-num { background: var(--accent-light); color: var(--text-dark); }
        .rank-item:nth-child(3) .rank-num { background: #FDE68A; color: var(--text-dark); }
        .rank-item .rank-info { flex: 1; }
        .rank-item .rank-info h4 { font-size: 1rem; font-weight: 700; margin-bottom: 2px; }
        .rank-item .rank-info p { font-size: 0.85rem; color: var(--text-muted); }
        .rank-item .rank-action .btn-sm { padding: 6px 18px; border-radius: 999px; background: var(--primary); color: #fff; font-size: 0.8rem; font-weight: 600; border: none; cursor: pointer; transition: all var(--transition); }
        .rank-item .rank-action .btn-sm:hover { background: var(--primary-dark); }

        /* ===== FAQ ===== */
        .faq-section { background: var(--bg-white); }
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            margin-bottom: 10px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 22px;
            cursor: pointer;
            background: var(--bg-light);
            font-weight: 600;
            color: var(--text-dark);
            font-size: 1rem;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(124, 58, 237, 0.05); }
        .faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 22px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.35s ease;
            background: var(--bg-white);
            color: var(--text-body);
            font-size: 0.95rem;
            line-height: 1.75;
        }
        .faq-item.open .faq-answer { padding: 16px 22px 20px; max-height: 400px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #2D1B69 100%);
            padding: 3.5rem 0;
            text-align: center;
        }
        .cta-section h2 { color: #fff; font-size: 2rem; font-weight: 800; margin-bottom: 0.5rem; }
        .cta-section p { color: rgba(255,255,255,0.8); max-width: 560px; margin: 0 auto 1.5rem; font-size: 1rem; }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: var(--text-dark);
            padding: 14px 36px;
            border-radius: 999px;
            font-weight: 800;
            font-size: 1.1rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
        }
        .cta-section .btn-cta:hover { background: #D97706; transform: scale(1.04); box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35); color: var(--text-dark); }
        .cta-section .btn-cta i { color: var(--primary); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 0.8rem; }
        .footer-brand .logo span { color: #fff; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.65); max-width: 360px; }
        .footer-social { display: flex; gap: 12px; margin-top: 1rem; }
        .footer-social a { color: rgba(255,255,255,0.5); font-size: 1.2rem; transition: all var(--transition); }
        .footer-social a:hover { color: var(--accent); transform: translateY(-2px); }
        .footer-col h5 { color: #fff; font-weight: 700; font-size: 1rem; margin-bottom: 1rem; }
        .footer-col a { display: block; color: rgba(255,255,255,0.6); font-size: 0.9rem; padding: 4px 0; transition: all var(--transition); }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 64em) {
            .card-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media screen and (max-width: 40em) {
            .header-inner { height: 60px; }
            .nav-tabs { display: none; }
            .nav-tabs.mobile-open { display: flex; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--bg-white); padding: 12px 20px; border-bottom: 2px solid var(--border-color); box-shadow: var(--shadow-lg); z-index: 99; gap: 4px; }
            .nav-tabs.mobile-open a { width: 100%; justify-content: center; }
            .mobile-toggle { display: block; }
            .header-cta .btn-download span { display: none; }
            .header-cta .btn-download i { margin-right: 0; }
            .header-cta .btn-download { padding: 8px 14px; }
            .category-hero h1 { font-size: 1.8rem; }
            .category-hero .subtitle { font-size: 0.95rem; }
            .category-hero .hero-stats { gap: 1.2rem; }
            .category-hero .stat-item .num { font-size: 1.4rem; }
            .card-grid { grid-template-columns: 1fr; }
            .alt-grid { flex-direction: column !important; gap: 1.5rem; }
            .alt-grid .alt-img { flex: 1 1 auto; width: 100%; }
            .alt-grid .alt-img img { height: 220px; }
            .alt-grid .alt-text { flex: 1 1 auto; width: 100%; }
            .section-title { font-size: 1.4rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
            .rank-item { flex-wrap: wrap; }
            .rank-item .rank-action { width: 100%; text-align: right; }
            .cta-section h2 { font-size: 1.4rem; }
            .faq-question { font-size: 0.9rem; padding: 14px 16px; }
            .faq-answer { font-size: 0.85rem; }
        }
        @media screen and (min-width: 40.063em) and (max-width: 64em) {
            .category-hero h1 { font-size: 2.2rem; }
            .alt-grid .alt-img img { height: 260px; }
        }