/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c3bf1;
            --primary-dark: #5228c9;
            --primary-light: #8f66f5;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #06b6d4;
            --bg-body: #0f0b1a;
            --bg-card: #1a1530;
            --bg-card-hover: #231e3d;
            --bg-elevated: #2a2444;
            --text-primary: #f1edf9;
            --text-secondary: #b8b0d0;
            --text-muted: #7b7299;
            --border-color: #2f2850;
            --border-light: #3d3560;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 40px rgba(108,59,241,0.25);
            --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1240px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-main);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: 16px;
            min-height: 100vh;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text-primary); }
        h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); margin-bottom: 0.5em; }
        h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
        p { margin-bottom: 1em; color: var(--text-secondary); }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section-padding { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 50px; }
        .section-title h2 { display: inline-block; position: relative; }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p { max-width: 620px; margin: 12px auto 0; font-size: 1.05rem; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(15, 11, 26, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .logo i { color: var(--primary-light); font-size: 1.5rem; }
        .logo span { background: linear-gradient(135deg, var(--primary-light), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { color: var(--text-primary); }
        .main-nav { display: flex; align-items: center; gap: 6px; }
        .main-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .main-nav a:hover { color: var(--text-primary); background: var(--bg-card); }
        .main-nav a.active { color: var(--text-primary); background: var(--bg-card); }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .header-actions { display: flex; align-items: center; gap: 12px; }
        .search-toggle, .menu-toggle {
            background: none;
            border: none;
            color: var(--text-secondary);
            font-size: 1.2rem;
            cursor: pointer;
            padding: 8px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .search-toggle:hover, .menu-toggle:hover { color: var(--text-primary); background: var(--bg-card); }
        .btn-header {
            padding: 8px 22px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.85rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 16px rgba(108,59,241,0.3);
        }
        .btn-header:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(108,59,241,0.4); color: #fff; }
        .menu-toggle { display: none; }

        /* ===== 移动端导航 ===== */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            width: 100%;
            background: rgba(15, 11, 26, 0.98);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 20px;
            flex-direction: column;
            gap: 8px;
            z-index: 999;
            transform: translateY(-10px);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
        }
        .mobile-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
        .mobile-nav a {
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
        }
        .mobile-nav a:hover { background: var(--bg-card); color: var(--text-primary); }
        .mobile-nav a.active { background: var(--bg-card); color: var(--text-primary); }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 20px 80px;
            position: relative;
            overflow: hidden;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15,11,26,0.70) 0%, rgba(15,11,26,0.85) 100%);
            z-index: 1;
        }
        .hero * { position: relative; z-index: 2; }
        .hero-content { max-width: 820px; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(108,59,241,0.2);
            border: 1px solid rgba(108,59,241,0.3);
            border-radius: 50px;
            font-size: 0.8rem;
            color: var(--primary-light);
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }
        .hero h1 { margin-bottom: 20px; }
        .hero h1 span { background: linear-gradient(135deg, var(--primary-light), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p { font-size: 1.15rem; max-width: 640px; margin: 0 auto 32px; color: var(--text-secondary); }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
        .btn-primary {
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 6px 24px rgba(108,59,241,0.35);
        }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 40px rgba(108,59,241,0.5); color: #fff; }
        .btn-secondary {
            padding: 14px 36px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid var(--border-light);
            cursor: pointer;
            transition: var(--transition);
            background: transparent;
            color: var(--text-primary);
        }
        .btn-secondary:hover { border-color: var(--primary); background: rgba(108,59,241,0.08); color: var(--text-primary); }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            margin-top: 50px;
            padding-top: 40px;
            border-top: 1px solid var(--border-color);
        }
        .hero-stat { text-align: center; }
        .hero-stat .num { font-size: 2rem; font-weight: 800; color: var(--text-primary); }
        .hero-stat .label { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }

        /* ===== 平台介绍 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .intro-image img { width: 100%; height: auto; }
        .intro-text h2 { margin-bottom: 16px; }
        .intro-text p { font-size: 1.05rem; margin-bottom: 20px; }
        .intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 24px; }
        .intro-feature {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .intro-feature i { color: var(--secondary); font-size: 1rem; }

        /* ===== 分类入口 ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
        }
        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            cursor: pointer;
        }
        .category-card:hover { transform: translateY(-6px); border-color: var(--primary); box-shadow: var(--shadow-glow); background: var(--bg-card-hover); }
        .category-card .icon { font-size: 2.2rem; color: var(--primary-light); margin-bottom: 16px; }
        .category-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .category-card p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

        /* ===== 最新资讯 (CMS) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .news-card:hover { transform: translateY(-4px); border-color: var(--primary-light); box-shadow: var(--shadow-glow); }
        .news-card .thumb {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg-elevated);
        }
        .news-card .body { padding: 18px 20px 22px; }
        .news-card .meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-muted); margin-bottom: 10px; }
        .news-card .meta .tag {
            padding: 2px 12px;
            border-radius: 50px;
            background: rgba(108,59,241,0.15);
            color: var(--primary-light);
            font-size: 0.75rem;
            font-weight: 500;
        }
        .news-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .news-card h3 a { color: var(--text-primary); }
        .news-card h3 a:hover { color: var(--primary-light); }
        .news-card p { font-size: 0.88rem; color: var(--text-secondary); margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-empty { text-align: center; padding: 60px 20px; color: var(--text-muted); font-size: 1.05rem; grid-column: 1 / -1; }

        /* ===== 平台特色 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow-glow); }
        .feature-card .icon { font-size: 2.4rem; color: var(--secondary); margin-bottom: 16px; }
        .feature-card h3 { margin-bottom: 10px; font-size: 1.1rem; }
        .feature-card p { font-size: 0.9rem; color: var(--text-secondary); margin: 0; }

        /* ===== 热门游戏 ===== */
        .games-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            gap: 24px;
        }
        .game-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .game-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: var(--shadow-glow); }
        .game-card .cover {
            width: 100%;
            height: 160px;
            object-fit: cover;
            background: var(--bg-elevated);
        }
        .game-card .info { padding: 16px 18px 20px; }
        .game-card .info h3 { font-size: 1rem; margin-bottom: 4px; }
        .game-card .info .genre { font-size: 0.78rem; color: var(--text-muted); margin-bottom: 10px; }
        .game-card .info .btn-small {
            padding: 6px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.78rem;
            font-weight: 600;
            border: none;
            cursor: pointer;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            transition: var(--transition);
        }
        .game-card .info .btn-small:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(108,59,241,0.3); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 760px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-light); }
        .faq-question {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question i { color: var(--text-muted); transition: var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--primary-light); }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            display: none;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer { display: block; }
        .faq-answer p { margin: 0; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(108,59,241,0.12), rgba(245,158,11,0.08));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 60px 40px;
            text-align: center;
        }
        .cta-section h2 { margin-bottom: 12px; }
        .cta-section p { max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 50px 0 30px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 30px;
        }
        .footer-brand .logo { margin-bottom: 12px; }
        .footer-brand p { font-size: 0.88rem; color: var(--text-muted); max-width: 320px; }
        .footer-col h4 { font-size: 0.95rem; margin-bottom: 16px; color: var(--text-primary); }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--bg-elevated);
            color: var(--text-muted);
            transition: var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .intro-grid { grid-template-columns: 1fr; gap: 30px; }
            .intro-image { order: -1; }
        }
        @media (max-width: 768px) {
            .main-nav, .header-actions .btn-header { display: none; }
            .menu-toggle { display: block; }
            .hero { padding: 100px 20px 60px; min-height: 80vh; }
            .hero-stats { gap: 24px; }
            .hero-stat .num { font-size: 1.5rem; }
            .section-padding { padding: 50px 0; }
            .features-grid { grid-template-columns: 1fr 1fr; }
            .games-grid { grid-template-columns: 1fr 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
            .cta-section { padding: 40px 24px; }
            .intro-features { grid-template-columns: 1fr; }
        }
        @media (max-width: 520px) {
            .header-inner { padding: 0 12px; }
            .logo { font-size: 1.1rem; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 0.95rem; }
            .features-grid { grid-template-columns: 1fr; }
            .games-grid { grid-template-columns: 1fr; }
            .categories-grid { grid-template-columns: 1fr 1fr; }
            .hero-actions { flex-direction: column; align-items: center; }
            .btn-primary, .btn-secondary { width: 100%; max-width: 280px; text-align: center; }
            .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
        }

        /* ===== 工具类 ===== */
        .text-gradient { background: linear-gradient(135deg, var(--primary-light), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-12 { gap: 12px; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c5ce7;
            --primary-light: #a29bfe;
            --primary-dark: #4834d4;
            --secondary: #fd79a8;
            --accent: #fdcb6e;
            --bg: #f8f9fe;
            --bg-alt: #ffffff;
            --bg-dark: #0f0e17;
            --text: #2d3436;
            --text-light: #636e72;
            --text-white: #ffffff;
            --border: #e0e0e0;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 4px 24px rgba(108, 92, 231, 0.10);
            --shadow-hover: 0 12px 40px rgba(108, 92, 231, 0.18);
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

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

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

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(108, 92, 231, 0.08);
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.96);
            box-shadow: 0 2px 32px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 1.8rem;
            color: var(--primary);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.9;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .main-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 3px;
            border-radius: 4px;
            background: var(--primary);
            transition: transform var(--transition);
        }
        .main-nav a:hover {
            color: var(--primary);
            background: rgba(108, 92, 231, 0.06);
        }
        .main-nav a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .main-nav a.active {
            color: var(--primary-dark);
            background: rgba(108, 92, 231, 0.10);
            font-weight: 600;
        }
        .main-nav a.active::after {
            transform: translateX(-50%) scaleX(1);
            background: var(--primary-dark);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 40px;
            padding: 0 16px;
            border: 1.5px solid transparent;
            transition: border var(--transition), box-shadow var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary-light);
            box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.10);
        }
        .search-box i {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .search-box input {
            background: transparent;
            padding: 8px 10px;
            width: 140px;
            font-size: 0.9rem;
            color: var(--text);
        }
        .search-box input::placeholder {
            color: var(--text-light);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.30);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(108, 92, 231, 0.40);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-primary i {
            font-size: 1rem;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 9px 20px;
            border: 2px solid var(--primary-light);
            color: var(--primary);
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            background: transparent;
            transition: all var(--transition);
            cursor: pointer;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }

        /* ===== 文章详情页 ===== */
        .article-banner {
            padding-top: calc(var(--nav-height) + 40px);
            padding-bottom: 40px;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.06), rgba(253, 121, 168, 0.04));
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a {
            color: var(--text-light);
        }
        .article-breadcrumb a:hover {
            color: var(--primary);
        }
        .article-breadcrumb .sep {
            color: var(--border);
        }
        .article-breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }

        .article-header {
            max-width: 860px;
            margin: 0 auto 30px;
        }
        .article-category {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(108, 92, 231, 0.12);
            color: var(--primary-dark);
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .article-title {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .article-meta i {
            margin-right: 6px;
            color: var(--primary-light);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
        }

        .article-featured-image {
            max-width: 860px;
            margin: 0 auto 32px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            aspect-ratio: 16/9;
            background: var(--border);
        }
        .article-featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .article-featured-image:hover img {
            transform: scale(1.02);
        }

        .article-body {
            max-width: 860px;
            margin: 0 auto 60px;
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            box-shadow: var(--shadow);
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content p {
            margin-bottom: 1.4em;
        }
        .article-content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-top: 2em;
            margin-bottom: 0.8em;
            color: var(--primary-dark);
        }
        .article-content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin-top: 1.6em;
            margin-bottom: 0.6em;
        }
        .article-content ul,
        .article-content ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }
        .article-content ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-content ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            padding: 12px 20px;
            margin: 1.4em 0;
            background: rgba(108, 92, 231, 0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
        }
        .article-content img {
            border-radius: var(--radius);
            margin: 1.6em 0;
            box-shadow: var(--shadow);
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--primary-dark);
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: var(--bg);
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--text-light);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .article-tag:hover {
            background: rgba(108, 92, 231, 0.08);
            color: var(--primary);
            border-color: var(--primary-light);
        }
        .article-tag i {
            font-size: 0.8rem;
            color: var(--primary-light);
        }

        .article-nav-links {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            flex-wrap: wrap;
        }
        .article-nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 20px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .article-nav-links a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 相关文章板块 ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 24px;
        }

        .related-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid rgba(108, 92, 231, 0.04);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .related-card .card-image {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--border);
        }
        .related-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .related-card:hover .card-image img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px 22px;
        }
        .related-card .card-category {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-title a {
            color: var(--text);
        }
        .related-card .card-title a:hover {
            color: var(--primary);
        }
        .related-card .card-excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: var(--text-light);
        }
        .related-card .card-meta i {
            margin-right: 4px;
            color: var(--primary-light);
        }

        /* ===== 错误状态 ===== */
        .article-error {
            max-width: 600px;
            margin: 80px auto;
            text-align: center;
            padding: 48px 32px;
            background: var(--bg-alt);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
        }
        .article-error i {
            font-size: 3.6rem;
            color: var(--primary-light);
            margin-bottom: 20px;
        }
        .article-error h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .article-error p {
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .article-error .btn-primary {
            display: inline-flex;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 16px;
            font-size: 1.2rem;
        }
        .footer-brand .logo i {
            font-size: 1.5rem;
        }
        .footer-brand .logo span {
            -webkit-text-fill-color: #fff;
            background: none;
            color: #fff;
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            border-radius: 4px;
            background: var(--primary);
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-col a i {
            width: 20px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.5);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .article-title {
                font-size: 2rem;
            }
            .article-body {
                padding: 32px 28px;
            }
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.06);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .main-nav a::after {
                display: none;
            }
            .main-nav a.active {
                background: rgba(108, 92, 231, 0.10);
            }
            .header-actions .search-box {
                display: none;
            }
            .header-actions .btn-outline {
                display: none;
            }

            .article-title {
                font-size: 1.6rem;
            }
            .article-body {
                padding: 24px 18px;
                border-radius: var(--radius);
            }
            .article-banner {
                padding-top: calc(var(--nav-height) + 24px);
                padding-bottom: 24px;
            }
            .article-content {
                font-size: 1rem;
            }
            .article-content h2 {
                font-size: 1.25rem;
            }
            .article-meta {
                gap: 12px;
                font-size: 0.85rem;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-title {
                font-size: 1.3rem;
            }
            .article-body {
                padding: 18px 14px;
            }
            .article-breadcrumb {
                font-size: 0.8rem;
                gap: 6px;
            }
            .article-category {
                font-size: 0.75rem;
                padding: 3px 12px;
            }
            .article-nav-links {
                flex-direction: column;
            }
            .article-nav-links a {
                width: 100%;
                justify-content: center;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.4rem;
            }
        }

        /* 回到顶部 */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.35);
            z-index: 999;
            transition: all var(--transition);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            border: none;
            cursor: pointer;
        }
        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        .back-to-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(108, 92, 231, 0.45);
        }

/* roulang page: category1 */
/* ===== :root Design Variables ===== */
        :root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #A29BFE;
            --primary-bg: #F4F2FF;
            --secondary: #FD79A8;
            --secondary-light: #FDCEDF;
            --accent: #FFB347;
            --accent-light: #FFEAA7;
            --dark: #1A1A2E;
            --dark-light: #2D2D44;
            --text: #2D2D44;
            --text-light: #6B7280;
            --text-white: #FFFFFF;
            --bg: #FAFAFE;
            --bg-card: #FFFFFF;
            --bg-gray: #F3F4F6;
            --border: #E5E7EB;
            --border-light: #F0F0F5;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-hover: 0 12px 32px rgba(108, 92, 231, 0.18);
            --radius: 16px;
            --radius-sm: 8px;
            --radius-xl: 24px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --header-h: 72px;
            --gap: 24px;
        }

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

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

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

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

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

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
            height: var(--header-h);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--dark);
            flex-shrink: 0;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
            transition: var(--transition);
        }
        .logo:hover i {
            transform: rotate(-8deg) scale(1.05);
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 15px;
            color: var(--text-light);
            transition: var(--transition);
            position: relative;
        }
        .main-nav a:hover {
            color: var(--primary);
            background: var(--primary-bg);
        }
        .main-nav a.active {
            color: var(--primary);
            background: var(--primary-bg);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--primary);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-actions .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-gray);
            border-radius: 40px;
            padding: 0 16px;
            height: 40px;
            border: 1px solid transparent;
            transition: var(--transition);
            min-width: 180px;
        }
        .header-actions .search-box:focus-within {
            border-color: var(--primary-light);
            background: var(--bg-card);
            box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.08);
        }
        .header-actions .search-box i {
            color: var(--text-light);
            font-size: 14px;
            margin-right: 8px;
        }
        .header-actions .search-box input {
            background: transparent;
            border: none;
            height: 100%;
            width: 100%;
            font-size: 14px;
            color: var(--text);
        }
        .header-actions .search-box input::placeholder {
            color: var(--text-light);
        }

        .btn-header {
            padding: 8px 20px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 14px;
            background: var(--primary);
            color: var(--text-white);
            transition: var(--transition);
            white-space: nowrap;
        }
        .btn-header:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow);
            color: var(--text-white);
        }

        /* Mobile toggle */
        .mobile-toggle {
            display: none;
            font-size: 24px;
            color: var(--dark);
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            background: none;
            border: none;
            cursor: pointer;
        }
        .mobile-toggle:hover {
            background: var(--bg-gray);
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.88) 0%, rgba(45, 45, 68, 0.70) 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 44px;
            color: var(--text-white);
            margin-bottom: 16px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }
        .page-banner h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            margin: 0 auto 12px;
            line-height: 1.6;
        }
        .page-banner .banner-tags {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
            margin-top: 20px;
        }
        .page-banner .banner-tags span {
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.9);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* ===== Section共用 ===== */
        .section {
            padding: 70px 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-header h2 i {
            color: var(--primary);
            margin-right: 8px;
        }
        .section-header p {
            font-size: 16px;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-header .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            margin: 16px auto 0;
        }

        /* ===== Filter Tabs ===== */
        .filter-tabs {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 40px;
        }
        .filter-tabs .tab-btn {
            padding: 8px 24px;
            border-radius: 40px;
            font-size: 14px;
            font-weight: 500;
            background: var(--bg-card);
            border: 1px solid var(--border);
            color: var(--text-light);
            transition: var(--transition);
            cursor: pointer;
        }
        .filter-tabs .tab-btn:hover {
            border-color: var(--primary-light);
            color: var(--primary);
            background: var(--primary-bg);
        }
        .filter-tabs .tab-btn.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
        }

        /* ===== Activity Card Grid ===== */
        .activity-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--gap);
        }
        .activity-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .activity-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .activity-card .card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-gray);
        }
        .activity-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .activity-card:hover .card-img img {
            transform: scale(1.05);
        }
        .activity-card .card-img .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--secondary);
            color: var(--text-white);
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(253, 121, 168, 0.4);
        }
        .activity-card .card-img .badge.hot {
            background: var(--accent);
            color: var(--dark);
            box-shadow: 0 2px 8px rgba(255, 179, 71, 0.4);
        }
        .activity-card .card-img .badge.new {
            background: var(--primary);
            box-shadow: 0 2px 8px rgba(108, 92, 231, 0.4);
        }
        .activity-card .card-img .countdown {
            position: absolute;
            bottom: 12px;
            right: 12px;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(8px);
            color: var(--text-white);
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .activity-card .card-img .countdown i {
            font-size: 12px;
            color: var(--accent);
        }

        .activity-card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .activity-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .activity-card .card-body .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 12px;
            font-size: 13px;
            color: var(--text-light);
        }
        .activity-card .card-body .meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .activity-card .card-body .meta i {
            font-size: 12px;
            color: var(--primary-light);
        }
        .activity-card .card-body .desc {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .activity-card .card-body .card-footer-act {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .activity-card .card-body .card-footer-act .reward {
            font-size: 14px;
            font-weight: 600;
            color: var(--secondary);
        }
        .activity-card .card-body .card-footer-act .reward i {
            margin-right: 4px;
        }
        .btn-join {
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 600;
            background: var(--primary);
            color: var(--text-white);
            transition: var(--transition);
            border: none;
        }
        .btn-join:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3);
            color: var(--text-white);
        }
        .btn-join.outline {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-join.outline:hover {
            background: var(--primary);
            color: var(--text-white);
        }

        /* ===== How It Works ===== */
        .how-works {
            background: var(--primary-bg);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            margin: 0 auto 16px;
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .step-item .step-arrow {
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 20px;
            color: var(--primary-light);
        }
        .steps-grid .step-item:last-child .step-arrow {
            display: none;
        }

        /* ===== Stats / Data ===== */
        .stats-section {
            background: var(--dark);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .stats-grid {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--gap);
            text-align: center;
        }
        .stat-item {
            padding: 32px 16px;
        }
        .stat-item .stat-num {
            font-size: 44px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 6px;
            letter-spacing: -0.5px;
        }
        .stat-item .stat-num i {
            color: var(--accent);
            font-size: 36px;
            margin-right: 8px;
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-item .faq-q {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 16px;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            user-select: none;
            transition: var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-item .faq-q:hover {
            color: var(--primary);
        }
        .faq-item .faq-q i {
            font-size: 14px;
            color: var(--text-light);
            transition: var(--transition);
        }
        .faq-item.active .faq-q i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item .faq-a {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-a {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 60px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 34px;
            color: var(--text-white);
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            border-radius: 60px;
            background: var(--text-white);
            color: var(--primary);
            font-weight: 700;
            font-size: 17px;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
            color: var(--primary-dark);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            font-size: 20px;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer-brand .logo i {
            color: var(--primary-light);
        }
        .footer-brand .logo span {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.6);
            font-size: 16px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .activity-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid .step-item .step-arrow {
                display: none;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-banner h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            .main-nav {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
                gap: 4px;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .main-nav a.active::after {
                display: none;
            }
            .main-nav a.active {
                background: var(--primary-bg);
            }
            .mobile-toggle {
                display: block;
            }
            .header-actions .search-box {
                min-width: 120px;
            }
            .header-actions .btn-header {
                padding: 6px 14px;
                font-size: 13px;
            }

            .page-banner {
                padding: 60px 0 40px;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 15px;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .activity-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-num {
                font-size: 32px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section .btn-cta {
                padding: 12px 30px;
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .header-actions .search-box {
                min-width: 80px;
                padding: 0 10px;
            }
            .header-actions .search-box input {
                font-size: 12px;
            }
            .header-actions .btn-header {
                padding: 4px 10px;
                font-size: 12px;
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 20px;
            }
            .page-banner h1 {
                font-size: 22px;
            }
            .page-banner p {
                font-size: 14px;
            }
            .filter-tabs .tab-btn {
                padding: 6px 16px;
                font-size: 13px;
            }
            .activity-card .card-body {
                padding: 16px 18px 18px;
            }
            .activity-card .card-body h3 {
                font-size: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-item {
                padding: 20px 8px;
            }
            .stat-item .stat-num {
                font-size: 26px;
            }
            .stat-item .stat-label {
                font-size: 13px;
            }
            .faq-item .faq-q {
                padding: 14px 18px;
                font-size: 14px;
            }
            .faq-item .faq-a {
                padding: 0 18px 14px;
                font-size: 14px;
            }
            .cta-section h2 {
                font-size: 22px;
            }
        }