/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --color-primary: #FF6B4A;
            --color-primary-dark: #E85D3F;
            --color-primary-light: #FFF1EC;
            --color-secondary: #2EC4B6;
            --color-secondary-light: #E6FAF8;
            --color-bg: #FDF8F5;
            --color-surface: #FFFFFF;
            --color-text: #23232E;
            --color-text-weak: #70707B;
            --color-border: #ECECEF;
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
            --max-width: 1200px;
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(46, 196, 182, 0.5);
            outline-offset: 2px;
            border-radius: 6px;
        }

        ul,
        ol {
            list-style: none;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        /* ========== 容器 ========== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .text-center {
            text-align: center;
        }

        /* ========== 头部导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--color-border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            font-size: 26px;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            line-height: 1.2;
        }

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

        .logo span {
            color: var(--color-text);
            font-weight: 700;
            font-size: 14px;
            margin-left: 4px;
        }

        .main-nav ul {
            display: flex;
            gap: 6px;
        }

        .main-nav a {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 999px;
            color: var(--color-text);
            font-weight: 500;
            font-size: 15px;
            text-decoration: none;
            transition: var(--transition);
        }

        .main-nav a:hover {
            background: var(--color-primary-light);
            color: var(--color-primary);
        }

        .main-nav a.active {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(255, 107, 74, 0.35);
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            background: var(--color-surface);
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text);
            transition: var(--transition);
        }

        .menu-toggle:hover {
            background: var(--color-primary-light);
            color: var(--color-primary);
        }

        /* ========== 首屏 Hero ========== */
        .hero {
            background: linear-gradient(135deg, #FFF5EE 0%, #FFE8DE 100%);
            padding: 120px 0 90px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: rgba(255, 107, 74, 0.1);
            top: -120px;
            right: -80px;
        }

        .hero::after {
            content: '';
            position: absolute;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(46, 196, 182, 0.12);
            bottom: -70px;
            left: -50px;
        }

        .hero .container {
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.7);
            border: 1px solid rgba(255, 107, 74, 0.25);
            color: var(--color-primary);
            font-size: 14px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }

        .hero h1 {
            font-size: clamp(28px, 4.5vw, 52px);
            line-height: 1.3;
            font-weight: 800;
            letter-spacing: -1px;
            max-width: 760px;
            margin: 0 auto 20px;
            color: var(--color-text);
        }

        .hero-sub {
            font-size: clamp(16px, 2vw, 20px);
            color: var(--color-text-weak);
            max-width: 560px;
            margin: 0 auto 36px;
            line-height: 1.6;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 32px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
        }

        .btn-primary {
            background: var(--color-primary);
            color: #fff;
            box-shadow: 0 6px 20px rgba(255, 107, 74, 0.35);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(255, 107, 74, 0.45);
        }

        .btn-outline {
            background: transparent;
            border-color: var(--color-text);
            color: var(--color-text);
        }

        .btn-outline:hover {
            background: var(--color-text);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-large {
            padding: 16px 44px;
            font-size: 17px;
        }

        /* ========== 数据栏 ========== */
        .stats {
            padding: 60px 0;
            background: var(--color-surface);
            border-bottom: 1px solid var(--color-border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }

        .stat-item strong {
            display: block;
            font-size: clamp(28px, 3vw, 40px);
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .stat-item span {
            color: var(--color-text-weak);
            font-size: 14px;
        }

        /* ========== 板块通用 ========== */
        .section {
            padding: 80px 0;
        }

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head h2 {
            font-size: clamp(24px, 3vw, 36px);
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 8px;
        }

        .section-head p {
            color: var(--color-text-weak);
            font-size: 16px;
        }

        /* ========== 核心卖点 ========== */
        .features {
            padding: 80px 0;
            background: var(--color-surface);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .feature-card {
            background: var(--color-bg);
            padding: 40px 30px;
            border-radius: var(--radius-lg);
            text-align: center;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .feature-card:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
            background: var(--color-surface);
        }

        .feature-icon {
            width: 68px;
            height: 68px;
            border-radius: 50%;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 30px;
            transition: var(--transition);
        }

        .feature-card:hover .feature-icon {
            background: var(--color-primary);
            color: #fff;
            transform: scale(1.08);
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .feature-card p {
            color: var(--color-text-weak);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ========== 视频精选 ========== */
        .videos {
            padding: 80px 0;
        }

        .video-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .video-card {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .video-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-border);
        }

        .video-cover {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #eee;
        }

        .video-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .video-card:hover .video-cover img {
            transform: scale(1.03);
        }

        .video-badge {
            position: absolute;
            bottom: 10px;
            left: 10px;
            background: rgba(0, 0, 0, 0.65);
            color: #fff;
            font-size: 12px;
            font-weight: 500;
            padding: 2px 10px;
            border-radius: 6px;
            backdrop-filter: blur(4px);
        }

        .video-info {
            padding: 18px 16px 16px;
        }

        .video-info .video-title {
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 44px;
        }

        .video-meta {
            display: flex;
            justify-content: space-between;
            color: var(--color-text-weak);
            font-size: 12px;
        }

        /* ========== 热榜 ========== */
        .hot {
            padding: 80px 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .hot-items {
            display: grid;
            gap: 12px;
            max-width: 900px;
            margin: 0 auto;
        }

        .hot-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--color-bg);
            border-radius: var(--radius-md);
            padding: 18px 24px;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .hot-item:hover {
            background: var(--color-surface);
            border-color: var(--color-border);
            box-shadow: var(--shadow-md);
            transform: translateX(6px);
        }

        .hot-num {
            font-size: 24px;
            font-weight: 800;
            color: var(--color-primary);
            width: 44px;
            text-align: center;
            flex-shrink: 0;
            font-family: Georgia, serif;
        }

        .hot-info {
            flex: 1;
            min-width: 0;
        }

        .hot-title {
            font-weight: 600;
            font-size: 16px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-bottom: 2px;
        }

        .hot-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--color-text-weak);
            background: var(--color-border);
            padding: 2px 10px;
            border-radius: 999px;
            margin-right: 8px;
        }

        .hot-plays {
            font-size: 13px;
            color: var(--color-text-weak);
            flex-shrink: 0;
        }

        /* ========== 分类推荐 ========== */
        .recommend-cat {
            padding: 80px 0;
        }

        .category-card {
            background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary-light));
            border-radius: var(--radius-lg);
            padding: 60px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            border: 1px solid rgba(255, 107, 74, 0.15);
            position: relative;
            overflow: hidden;
        }

        .category-card::after {
            content: '';
            position: absolute;
            right: -60px;
            bottom: -60px;
            width: 240px;
            height: 240px;
            background: rgba(255, 107, 74, 0.08);
            border-radius: 50%;
        }

        .category-info {
            flex: 1;
            position: relative;
            z-index: 1;
        }

        .category-info .badge {
            display: inline-block;
            background: var(--color-primary);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .category-info h2 {
            font-size: clamp(26px, 3vw, 38px);
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }

        .category-info p {
            color: var(--color-text-weak);
            font-size: 16px;
            line-height: 1.7;
            max-width: 480px;
        }

        .category-action {
            flex-shrink: 0;
            position: relative;
            z-index: 1;
        }

        /* ========== 用户评价 ========== */
        .testimonials {
            padding: 80px 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
        }

        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            padding: 32px;
            position: relative;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .testimonial-card:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            background: var(--color-surface);
        }

        .testimonial-card::before {
            content: '“';
            font-family: Georgia, serif;
            font-size: 72px;
            line-height: 1;
            color: var(--color-primary);
            opacity: 0.25;
            position: absolute;
            top: 16px;
            right: 24px;
        }

        .testimonial-card p {
            font-size: 15px;
            line-height: 1.7;
            color: var(--color-text);
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: var(--color-primary);
            font-size: 16px;
        }

        .testimonial-author .name {
            font-weight: 600;
            font-size: 14px;
        }

        /* ========== 观影指南 ========== */
        .guide {
            padding: 80px 0;
        }

        .guide-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-step {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 44px 30px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            position: relative;
            transition: var(--transition);
        }

        .guide-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--color-primary);
            color: #fff;
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 20px;
            box-shadow: 0 6px 18px rgba(255, 107, 74, 0.35);
        }

        .guide-step h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .guide-step p {
            color: var(--color-text-weak);
            font-size: 15px;
            line-height: 1.7;
        }

        /* ========== FAQ ========== */
        .faq {
            padding: 80px 0;
            background: var(--color-surface);
            border-top: 1px solid var(--color-border);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-list details {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-bottom: 14px;
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .faq-list details:hover {
            border-color: rgba(255, 107, 74, 0.4);
        }

        .faq-list details[open] {
            border-color: var(--color-primary);
            background: var(--color-surface);
        }

        .faq-list summary {
            cursor: pointer;
            font-weight: 600;
            font-size: 17px;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

        .faq-list summary::-webkit-details-marker {
            display: none;
        }

        .faq-list summary::after {
            content: '+';
            font-size: 26px;
            font-weight: 400;
            color: var(--color-primary);
            transition: transform 0.3s ease;
            line-height: 1;
            flex-shrink: 0;
        }

        .faq-list details[open] summary::after {
            content: '−';
        }

        .faq-list .faq-answer {
            margin-top: 14px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--color-text-weak);
            border-top: 1px dashed var(--color-border);
            padding-top: 14px;
        }

        /* ========== CTA ========== */
        .cta {
            padding: 80px 0;
        }

        .cta-card {
            background: linear-gradient(135deg, var(--color-primary) 0%, #FF8E6E 100%);
            border-radius: var(--radius-lg);
            padding: 80px 40px;
            text-align: center;
            color: #fff;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            left: -40px;
            top: -40px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
        }

        .cta-card::after {
            content: '';
            position: absolute;
            right: -40px;
            bottom: -40px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }

        .cta-card h2 {
            font-size: clamp(24px, 3vw, 36px);
            font-weight: 800;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-card p {
            font-size: 16px;
            margin-bottom: 32px;
            opacity: 0.95;
            position: relative;
            z-index: 1;
        }

        .cta-card .btn {
            background: #fff;
            color: var(--color-primary);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
            position: relative;
            z-index: 1;
        }

        .cta-card .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            color: var(--color-primary-dark);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--color-text);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
        }

        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }

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

        .footer-brand .logo span {
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 18px;
        }

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

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--color-primary);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-copyright {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-domain {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .video-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .hero {
                padding: 100px 0 70px;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .main-nav {
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: var(--color-surface);
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-md);
                padding: 20px 24px;
                display: none;
            }

            .main-nav.open {
                display: block;
            }

            .main-nav ul {
                flex-direction: column;
                gap: 8px;
            }

            .main-nav a {
                display: block;
                padding: 12px 20px;
                border-radius: var(--radius-sm);
            }

            .main-nav a.active {
                box-shadow: none;
            }

            .main-nav a:hover {
                background: var(--color-primary-light);
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

            .features-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .video-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .testimonial-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .guide-steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .category-card {
                flex-direction: column;
                padding: 40px 30px;
                text-align: center;
            }

            .category-info p {
                margin: 0 auto 24px;
            }

            .cta-card {
                padding: 60px 24px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .video-grid {
                grid-template-columns: 1fr;
            }

            .hot-item {
                flex-wrap: wrap;
                gap: 10px;
                padding: 14px 16px;
            }

            .hot-title {
                white-space: normal;
            }

            .hot-plays {
                margin-left: 54px;
                font-size: 12px;
            }

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

            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
            }

            .stats {
                padding: 40px 0;
            }

            .features,
            .videos,
            .hot,
            .recommend-cat,
            .testimonials,
            .guide,
            .faq,
            .cta {
                padding: 50px 0;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
        }

/* roulang page: category1 */
:root {
    --color-primary: #FF6B4A;
    --color-primary-dark: #E85D3F;
    --color-primary-light: #FFF1EC;
    --color-secondary: #2EC4B6;
    --color-secondary-light: #E6FAF8;
    --color-bg: #FDF8F5;
    --color-surface: #FFFFFF;
    --color-text: #23232E;
    --color-text-weak: #70707B;
    --color-border: #ECECEF;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
    --max-width: 1200px;
}
html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}
img {
    max-width: 100%;
    display: block;
}
a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}
a:hover {
    color: var(--color-primary-dark);
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 3px solid rgba(46, 196, 182, 0.5);
    outline-offset: 2px;
    border-radius: 6px;
}
button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}
.text-center {
    text-align: center;
}
/* ========== 头部导航 ========== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.logo {
    font-size: 26px;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -0.5px;
    line-height: 1.2;
}
.logo:hover {
    color: var(--color-primary-dark);
}
.logo span {
    color: var(--color-text);
    font-weight: 700;
    font-size: 14px;
    margin-left: 4px;
}
.main-nav ul {
    display: flex;
    gap: 6px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.main-nav a {
    display: inline-block;
    padding: 8px 18px;
    border-radius: 999px;
    color: var(--color-text);
    font-weight: 500;
    font-size: 15px;
    text-decoration: none;
    transition: var(--transition);
}
.main-nav a:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
}
.main-nav a.active {
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    box-shadow: 0 4px 14px rgba(255, 107, 74, 0.35);
}
.menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    transition: var(--transition);
}
.menu-toggle:hover {
    background: var(--color-primary-light);
    color: var(--color-primary);
}
/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}
.btn-primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 6px 20px rgba(255, 107, 74, 0.3);
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 26px rgba(255, 107, 74, 0.4);
}
.btn-outline {
    background: transparent;
    border: 1.5px solid var(--color-border);
    color: var(--color-text);
    padding: 11px 26px;
}
.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
    transform: translateY(-2px);
}
/* ========== 分类页 Hero ========== */
.category-hero {
    background: linear-gradient(135deg, #FFF1EC 0%, #FFE8DE 40%, #E6FAF8 100%);
    padding: 110px 0 90px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.category-hero::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(255, 107, 74, 0.1);
    top: -100px;
    left: -60px;
}
.category-hero::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: rgba(46, 196, 182, 0.15);
    bottom: -60px;
    right: -40px;
}
.category-hero .container {
    position: relative;
    z-index: 1;
}
.category-hero-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(255, 107, 74, 0.2);
    color: var(--color-primary);
    font-size: 14px;
    font-weight: 600;
    padding: 6px 20px;
    border-radius: 999px;
    margin-bottom: 28px;
    backdrop-filter: blur(4px);
}
.category-hero h1 {
    font-size: clamp(30px, 5vw, 52px);
    line-height: 1.25;
    font-weight: 800;
    letter-spacing: -1px;
    max-width: 780px;
    margin: 0 auto 20px;
    color: var(--color-text);
}
.category-hero-sub {
    font-size: clamp(16px, 2vw, 19px);
    color: var(--color-text-weak);
    max-width: 600px;
    margin: 0 auto 36px;
    line-height: 1.65;
}
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
/* ========== 板块标题 ========== */
.section-title {
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--color-text);
    margin-bottom: 12px;
}
.section-sub {
    font-size: 16px;
    color: var(--color-text-weak);
    max-width: 520px;
    margin: 0 auto 40px;
    line-height: 1.6;
}
.section-header {
    text-align: center;
    margin-bottom: 50px;
}
/* ========== 统计区 ========== */
.stats-section {
    padding: 80px 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
}
.stat-item {
    padding: 30px 20px;
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    transition: var(--transition);
    border: 1px solid transparent;
}
.stat-item:hover {
    border-color: var(--color-border);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}
.stat-number {
    font-size: 40px;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.2;
    margin-bottom: 8px;
}
.stat-label {
    font-size: 15px;
    color: var(--color-text-weak);
    font-weight: 500;
}
/* ========== 卖点区 ========== */
.features-section {
    padding: 90px 0;
    background: var(--color-bg);
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.feature-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
}
.feature-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-color: transparent;
}
.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
    background: var(--color-primary-light);
}
.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
}
.feature-card p {
    font-size: 14px;
    color: var(--color-text-weak);
    line-height: 1.65;
    margin-bottom: 0;
}
.feature-tag {
    display: inline-block;
    background: var(--color-secondary-light);
    color: var(--color-secondary);
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 999px;
    margin-top: 14px;
}
/* ========== 精选内容 ========== */
.showcase-section {
    padding: 90px 0;
    background: var(--color-surface);
}
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.showcase-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
.showcase-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}
.showcase-media {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}
.showcase-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.showcase-card:hover .showcase-media img {
    transform: scale(1.04);
}
.showcase-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(6px);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 14px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.15);
}
.showcase-body {
    padding: 24px;
    flex: 1;
}
.showcase-body h3 {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
    line-height: 1.4;
}
.showcase-body p {
    font-size: 14px;
    color: var(--color-text-weak);
    line-height: 1.6;
    margin-bottom: 14px;
}
.showcase-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 24px 20px;
    margin-top: auto;
}
.showcase-category {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    background: var(--color-primary-light);
    padding: 4px 12px;
    border-radius: 999px;
}
.showcase-duration {
    font-size: 13px;
    color: var(--color-text-weak);
}
.showcase-more {
    text-align: center;
    margin-top: 44px;
}
/* ========== 适用场景 ========== */
.scenarios-section {
    padding: 90px 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, #F5F9F8 100%);
}
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.scenario-item {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
}
.scenario-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}
.scenario-emoji {
    font-size: 36px;
    margin-bottom: 16px;
    display: block;
}
.scenario-item h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}
.scenario-item p {
    font-size: 13px;
    color: var(--color-text-weak);
    line-height: 1.6;
    margin-bottom: 0;
}
/* ========== 流程 ========== */
.process-section {
    padding: 90px 0;
    background: var(--color-surface);
}
.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}
.process-step {
    text-align: center;
    padding: 40px 20px;
    position: relative;
}
.step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 18px;
    box-shadow: 0 6px 20px rgba(255, 107, 74, 0.3);
}
.process-step h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}
.process-step p {
    font-size: 14px;
    color: var(--color-text-weak);
    line-height: 1.6;
}
/* ========== FAQ ========== */
.faq-section {
    padding: 90px 0;
    background: var(--color-bg);
}
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0;
    margin-bottom: 14px;
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}
.faq-item summary {
    padding: 20px 24px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}
.faq-item summary::-webkit-details-marker {
    display: none;
}
.faq-item summary::after {
    content: '+';
    font-size: 22px;
    color: var(--color-primary);
    transition: var(--transition);
    flex-shrink: 0;
    margin-left: 16px;
}
.faq-item[open] summary::after {
    transform: rotate(45deg);
}
.faq-item[open] summary {
    border-bottom: 1px solid var(--color-border);
    background: var(--color-primary-light);
}
.faq-item .faq-answer {
    padding: 18px 24px;
    font-size: 14px;
    color: var(--color-text-weak);
    line-height: 1.7;
}
/* ========== CTA ========== */
.cta-section {
    padding: 90px 0;
    background: linear-gradient(135deg, #FF6B4A 0%, #FF8A68 50%, #E85D3F 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-section::before {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
    top: -120px;
    right: -60px;
}
.cta-section::after {
    content: '';
    position: absolute;
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    bottom: -50px;
    left: -40px;
}
.cta-section .container {
    position: relative;
    z-index: 1;
}
.cta-section h2 {
    color: #fff;
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 800;
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}
.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 16px;
    max-width: 500px;
    margin: 0 auto 30px;
    line-height: 1.6;
}
.cta-btn {
    background: #fff;
    color: var(--color-primary) !important;
    font-weight: 700;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}
.cta-btn:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}
/* ========== 页脚 ========== */
.site-footer {
    background: #1E1E28;
    color: #B0B0C0;
    padding: 70px 0 30px;
}
.footer-inner {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: 50px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .logo {
    color: var(--color-primary);
    font-size: 24px;
}
.footer-brand .logo span {
    color: #fff;
}
.footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    color: #9A9AAD;
    max-width: 320px;
    margin-top: 14px;
}
.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 18px;
}
.footer-col ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-col ul li {
    margin-bottom: 10px;
}
.footer-col ul li a {
    color: #9A9AAD;
    font-size: 14px;
    text-decoration: none;
    transition: var(--transition);
}
.footer-col ul li a:hover {
    color: var(--color-primary);
}
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    font-size: 13px;
    color: #777788;
    flex-wrap: wrap;
    gap: 10px;
}
/* ========== 响应式 ========== */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .process-steps {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
}
@media (max-width: 768px) {
    .container {
        padding-left: 20px;
        padding-right: 20px;
    }
    .site-header {
        position: relative;
    }
    .header-inner {
        height: 64px;
    }
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        padding: 16px 20px;
        transform: translateY(-120%);
        transition: transform 0.3s ease, visibility 0.3s ease, opacity 0.3s ease;
        visibility: hidden;
        opacity: 0;
        box-shadow: var(--shadow-lg);
    }
    .main-nav.open {
        transform: translateY(0);
        visibility: visible;
        opacity: 1;
    }
    .main-nav ul {
        flex-direction: column;
        gap: 4px;
    }
    .main-nav a {
        display: block;
        padding: 12px 16px;
        font-size: 16px;
    }
    .category-hero {
        padding: 70px 0 60px;
    }
    .category-hero h1 {
        font-size: 28px;
    }
    .hero-actions {
        flex-direction: column;
        width: 100%;
        max-width: 320px;
        margin-left: auto;
        margin-right: auto;
    }
    .hero-actions .btn {
        width: 100%;
    }
    .stats-section {
        padding: 60px 0;
    }
    .features-section,
    .showcase-section,
    .scenarios-section,
    .process-section,
    .faq-section,
    .cta-section {
        padding: 60px 0;
    }
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        justify-content: center;
    }
}
@media (max-width: 576px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }
    .stat-number {
        font-size: 30px;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .showcase-grid {
        grid-template-columns: 1fr;
    }
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    .process-steps {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .process-step {
        padding: 24px 16px;
    }
    .section-header {
        margin-bottom: 32px;
    }
}

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