/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --primary: #4F46E5;
            --primary-dark: #3730A3;
            --primary-light: #818CF8;
            --accent: #F59E0B;
            --accent-dark: #D97706;
            --accent-light: #FCD34D;
            --bg: #F8FAFC;
            --bg-alt: #EFF6FF;
            --bg-dark: #0F172A;
            --text: #1E293B;
            --text-light: #64748B;
            --text-white: #FFFFFF;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-h: 76px;
        }

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

        /* ========== 容器 ========== */
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; width: 100%; }
        .container-narrow { max-width: 800px; }
        .container-wide { max-width: 1400px; }

        /* ========== 网格辅助 (Foundation 覆盖) ========== */
        .grid-x { display: flex; flex-flow: row wrap; }
        .grid-padding-x > .cell { padding-left: 16px; padding-right: 16px; }
        .cell { flex: 0 0 auto; min-height: 0; }
        .small-12 { width: 100%; }
        .medium-6 { width: 50%; }
        .medium-4 { width: 33.3333%; }
        .medium-3 { width: 25%; }
        .large-3 { width: 25%; }
        .large-4 { width: 33.3333%; }
        .large-6 { width: 50%; }
        .large-8 { width: 66.6667%; }

        /* ========== 头部 & 导航 ========== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            height: var(--header-h);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: var(--header-h); max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
        }
        .header-logo {
            display: flex; align-items: center; gap: 10px; font-size: 1.5rem; font-weight: 800;
            color: var(--primary); letter-spacing: -0.5px; flex-shrink: 0;
        }
        .header-logo i { font-size: 1.6rem; color: var(--accent); }
        .header-logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .header-nav { display: flex; align-items: center; gap: 32px; }
        .header-nav a {
            font-size: 0.95rem; font-weight: 600; color: var(--text-light); position: relative;
            padding: 6px 0; transition: var(--transition);
        }
        .header-nav a::after {
            content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2.5px;
            background: var(--primary); border-radius: 4px; transition: var(--transition);
        }
        .header-nav a:hover { color: var(--primary); }
        .header-nav a:hover::after { width: 100%; }
        .header-nav a.active { color: var(--primary); }
        .header-nav a.active::after { width: 100%; }
        .header-actions { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
        .header-search {
            display: flex; align-items: center; background: var(--bg); border-radius: 40px;
            padding: 0 16px; border: 1px solid var(--border); transition: var(--transition);
        }
        .header-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(79,70,229,0.1); }
        .header-search i { color: var(--text-light); font-size: 0.9rem; }
        .header-search input {
            border: none; background: transparent; padding: 8px 10px; width: 160px;
            font-size: 0.9rem; color: var(--text);
        }
        .header-search input::placeholder { color: var(--text-light); }
        .btn-login {
            font-size: 0.9rem; font-weight: 600; color: var(--text); padding: 8px 18px;
            border-radius: 40px; transition: var(--transition); background: transparent; border: none; cursor: pointer;
        }
        .btn-login:hover { background: var(--border-light); color: var(--primary); }
        .btn-cta {
            font-size: 0.9rem; font-weight: 700; color: #fff; padding: 10px 26px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: 40px; border: none; cursor: pointer; transition: var(--transition);
            box-shadow: 0 4px 14px rgba(79,70,229,0.35);
        }
        .btn-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,70,229,0.45); color: #fff; }
        .btn-cta:active { transform: translateY(0); }

        /* 移动端汉堡 */
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
        .hamburger span { width: 26px; height: 2.5px; background: var(--text); border-radius: 4px; transition: var(--transition); }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* ========== 按钮通用 ========== */
        .btn { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; padding: 12px 28px; border-radius: 40px; border: none; cursor: pointer; transition: var(--transition); font-size: 0.95rem; }
        .btn-primary { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: #fff; box-shadow: 0 4px 14px rgba(79,70,229,0.3); }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(79,70,229,0.4); color: #fff; }
        .btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .btn-accent { background: linear-gradient(135deg, var(--accent), var(--accent-dark)); color: #fff; box-shadow: 0 4px 14px rgba(245,158,11,0.35); }
        .btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(245,158,11,0.45); color: #fff; }
        .btn-white { background: #fff; color: var(--primary); box-shadow: var(--shadow-md); }
        .btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); color: var(--primary-dark); }

        /* ========== Hero ========== */
        .hero {
            position: relative; min-height: 620px; display: flex; align-items: center; justify-content: center;
            margin-top: var(--header-h); overflow: hidden; background: var(--bg-dark);
        }
        .hero-bg {
            position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.5; transform: scale(1.05); transition: transform 0.6s ease;
        }
        .hero:hover .hero-bg { transform: scale(1); }
        .hero-overlay {
            position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(79,70,229,0.55) 70%, rgba(15,23,42,0.7) 100%);
        }
        .hero-content {
            position: relative; z-index: 2; text-align: center; max-width: 820px; padding: 60px 24px;
        }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,0.12);
            backdrop-filter: blur(8px); padding: 8px 20px; border-radius: 40px; color: #fff; font-size: 0.85rem;
            font-weight: 500; margin-bottom: 24px; border: 1px solid rgba(255,255,255,0.15);
        }
        .hero-badge i { color: var(--accent); }
        .hero h1 {
            font-size: 3.2rem; font-weight: 800; color: #fff; line-height: 1.2; margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero h1 .highlight { background: linear-gradient(135deg, var(--accent-light), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p {
            font-size: 1.15rem; color: rgba(255,255,255,0.85); max-width: 640px; margin: 0 auto 32px;
            line-height: 1.8;
        }
        .hero-actions { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .hero-search-box {
            display: flex; align-items: center; background: rgba(255,255,255,0.15);
            backdrop-filter: blur(8px); border-radius: 48px; padding: 4px; border: 1px solid rgba(255,255,255,0.2);
            max-width: 480px; width: 100%;
        }
        .hero-search-box i { color: rgba(255,255,255,0.6); padding: 0 0 0 18px; font-size: 1rem; }
        .hero-search-box input {
            flex: 1; background: transparent; border: none; padding: 14px 16px; color: #fff; font-size: 0.95rem;
        }
        .hero-search-box input::placeholder { color: rgba(255,255,255,0.5); }
        .hero-search-box button {
            background: var(--accent); border: none; color: #fff; font-weight: 700; padding: 12px 28px;
            border-radius: 40px; cursor: pointer; transition: var(--transition); font-size: 0.9rem;
        }
        .hero-search-box button:hover { background: var(--accent-dark); }

        /* ========== 板块通用 ========== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: #fff; }
        .section-title {
            text-align: center; margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: 2.1rem; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.3px;
        }
        .section-title p {
            font-size: 1.05rem; color: var(--text-light); max-width: 560px; margin: 0 auto; line-height: 1.8;
        }
        .section-dark .section-title h2 { color: #fff; }
        .section-dark .section-title p { color: rgba(255,255,255,0.7); }

        /* ========== 特色卡片 ========== */
        .feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .feature-card {
            background: #fff; border-radius: var(--radius-md); padding: 32px 24px; text-align: center;
            border: 1px solid var(--border); transition: var(--transition); position: relative; overflow: hidden;
        }
        .feature-card::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
            background: linear-gradient(135deg, var(--primary), var(--accent)); opacity: 0; transition: var(--transition);
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .feature-card:hover::before { opacity: 1; }
        .feature-icon {
            width: 64px; height: 64px; margin: 0 auto 18px; border-radius: 16px;
            display: flex; align-items: center; justify-content: center; font-size: 1.6rem; color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
        }
        .feature-card:nth-child(2) .feature-icon { background: linear-gradient(135deg, var(--accent), var(--accent-light)); }
        .feature-card:nth-child(3) .feature-icon { background: linear-gradient(135deg, #10B981, #34D399); }
        .feature-card:nth-child(4) .feature-icon { background: linear-gradient(135deg, #EF4444, #F87171); }
        .feature-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
        .feature-card p { font-size: 0.92rem; color: var(--text-light); line-height: 1.7; }

        /* ========== 内容列表 (CMS) ========== */
        .content-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        .content-item {
            display: flex; gap: 18px; background: #fff; padding: 18px 20px; border-radius: var(--radius-sm);
            border: 1px solid var(--border); transition: var(--transition); align-items: flex-start;
        }
        .content-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: transparent; }
        .content-item .thumb {
            width: 80px; height: 80px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0;
            background: var(--bg-alt);
        }
        .content-item .info { flex: 1; min-width: 0; }
        .content-item .info h4 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; line-height: 1.4; }
        .content-item .info h4 a { color: var(--text); }
        .content-item .info h4 a:hover { color: var(--primary); }
        .content-item .meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--text-light); }
        .content-item .meta .tag {
            display: inline-block; background: var(--bg-alt); padding: 2px 12px; border-radius: 20px;
            font-size: 0.75rem; font-weight: 600; color: var(--primary);
        }
        .content-item .meta i { margin-right: 4px; }
        .content-empty {
            grid-column: 1 / -1; text-align: center; padding: 48px 20px; color: var(--text-light);
            background: #fff; border-radius: var(--radius-md); border: 1px dashed var(--border);
        }
        .content-empty i { font-size: 2.4rem; color: var(--border); margin-bottom: 12px; display: block; }

        /* ========== 分类精选 ========== */
        .category-showcase {
            display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center;
        }
        .category-showcase .visual {
            border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg);
            position: relative; aspect-ratio: 4/3;
        }
        .category-showcase .visual img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .category-showcase .visual:hover img { transform: scale(1.04); }
        .category-showcase .text h3 { font-size: 1.8rem; font-weight: 800; margin-bottom: 16px; }
        .category-showcase .text p { font-size: 1.02rem; color: var(--text-light); line-height: 1.8; margin-bottom: 20px; }
        .category-showcase .text .tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 20px; }
        .category-showcase .text .tags span {
            background: var(--bg-alt); padding: 6px 16px; border-radius: 24px; font-size: 0.85rem;
            font-weight: 500; color: var(--text-light); border: 1px solid var(--border);
        }

        /* ========== 数据统计 ========== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            text-align: center; background: rgba(255,255,255,0.06); padding: 32px 16px; border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.1); transition: var(--transition);
        }
        .stat-card:hover { background: rgba(255,255,255,0.1); transform: translateY(-4px); }
        .stat-card .num { font-size: 2.6rem; font-weight: 800; color: #fff; margin-bottom: 4px; }
        .stat-card .num .accent { color: var(--accent); }
        .stat-card .label { font-size: 0.95rem; color: rgba(255,255,255,0.65); }

        /* ========== 热门话题 ========== */
        .topics-cloud {
            display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; max-width: 700px; margin: 0 auto;
        }
        .topics-cloud a {
            display: inline-block; background: #fff; padding: 10px 24px; border-radius: 40px;
            border: 1px solid var(--border); font-size: 0.92rem; font-weight: 500; color: var(--text-light);
            transition: var(--transition);
        }
        .topics-cloud a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(79,70,229,0.25); }
        .topics-cloud a .count {
            display: inline-block; background: var(--bg-alt); font-size: 0.75rem; padding: 0 10px;
            border-radius: 20px; margin-left: 6px; color: var(--text-light); font-weight: 600;
        }
        .topics-cloud a:hover .count { background: rgba(255,255,255,0.2); color: #fff; }

        /* ========== FAQ ========== */
        .faq-list { max-width: 740px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: #fff; border-radius: var(--radius-sm); border: 1px solid var(--border);
            overflow: hidden; transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-item summary {
            padding: 18px 24px; font-weight: 600; font-size: 1rem; cursor: pointer;
            display: flex; align-items: center; justify-content: space-between; list-style: none;
            transition: var(--transition);
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: '\f107'; font-family: 'Font Awesome 6 Free'; font-weight: 900; font-size: 0.9rem;
            color: var(--text-light); transition: var(--transition);
        }
        .faq-item[open] summary::after { transform: rotate(180deg); }
        .faq-item[open] summary { color: var(--primary); }
        .faq-item .answer {
            padding: 0 24px 18px; color: var(--text-light); line-height: 1.8; font-size: 0.95rem;
        }

        /* ========== CTA ========== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border-radius: var(--radius-lg); padding: 60px 48px; text-align: center; position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08; mix-blend-mode: overlay;
        }
        .cta-box h2 { font-size: 2rem; font-weight: 800; color: #fff; margin-bottom: 12px; position: relative; }
        .cta-box p { font-size: 1.05rem; color: rgba(255,255,255,0.85); max-width: 540px; margin: 0 auto 28px; position: relative; }
        .cta-box .btn { position: relative; }
        .cta-box .btn i { transition: var(--transition); }
        .cta-box .btn:hover i { transform: translateX(4px); }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 48px 0 32px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .logo { font-size: 1.4rem; font-weight: 800; color: #fff; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.8; max-width: 320px; }
        .footer-col h4 { font-size: 0.95rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
        .footer-col a { display: block; font-size: 0.9rem; color: rgba(255,255,255,0.6); padding: 4px 0; transition: var(--transition); }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.06);
            display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px;
            font-size: 0.85rem; color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.6); transition: var(--transition); }
        .footer-social a:hover { background: var(--primary); color: #fff; }

        /* ========== 移动端导航 ========== */
        .mobile-nav {
            display: none; position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
            background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); z-index: 999;
            padding: 32px 24px; flex-direction: column; gap: 20px; overflow-y: auto;
            opacity: 0; pointer-events: none; transition: opacity 0.35s ease;
        }
        .mobile-nav.open { opacity: 1; pointer-events: all; }
        .mobile-nav a {
            font-size: 1.15rem; font-weight: 600; color: var(--text); padding: 12px 0;
            border-bottom: 1px solid var(--border); display: block;
        }
        .mobile-nav a.active { color: var(--primary); }
        .mobile-nav .btn-cta { width: 100%; text-align: center; margin-top: 12px; }

        /* ========== 响应式断点 ========== */
        @media (max-width: 1024px) {
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .category-showcase { grid-template-columns: 1fr; }
            .category-showcase .visual { order: -1; }
            .hero h1 { font-size: 2.6rem; }
        }
        @media (max-width: 768px) {
            .header-nav { display: none; }
            .header-actions .btn-login,
            .header-actions .btn-cta { display: none; }
            .header-actions .header-search { display: none; }
            .hamburger { display: flex; }
            .mobile-nav { display: flex; }
            .hero { min-height: 480px; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-search-box { flex-direction: column; background: transparent; border: none; gap: 12px; }
            .hero-search-box input { background: rgba(255,255,255,0.12); border-radius: 40px; padding: 12px 18px; width: 100%; }
            .hero-search-box button { width: 100%; }
            .section { padding: 48px 0; }
            .section-title h2 { font-size: 1.6rem; }
            .content-list { grid-template-columns: 1fr; }
            .feature-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .stat-card .num { font-size: 2rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .cta-box { padding: 40px 24px; }
            .cta-box h2 { font-size: 1.5rem; }
            .faq-item summary { padding: 14px 18px; font-size: 0.95rem; }
            .hero-badge { font-size: 0.78rem; }
            .category-showcase .text h3 { font-size: 1.4rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.6rem; }
            .hero p { font-size: 0.92rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 20px 12px; }
            .stat-card .num { font-size: 1.6rem; }
            .section-title h2 { font-size: 1.35rem; }
            .container { padding: 0 16px; }
            .content-item { flex-direction: column; }
            .content-item .thumb { width: 100%; height: 140px; }
            .topics-cloud a { font-size: 0.82rem; padding: 8px 16px; }
        }
        @media (min-width: 769px) {
            .mobile-nav { display: none !important; }
        }
        @media (min-width: 769px) and (max-width: 1024px) {
            .header-search input { width: 100px; }
            .header-nav { gap: 20px; }
        }
        /* ========== 滚动栏阴影 ========== */
        .site-header.scrolled { border-bottom-color: transparent; }
        /* ========== 图片圆角统一 ========== */
        .rounded-img { border-radius: var(--radius-sm); }
        /* ========== 分隔线 ========== */
        .divider { width: 60px; height: 4px; background: linear-gradient(135deg, var(--primary), var(--accent)); border-radius: 4px; margin: 0 auto 16px; }
        .section-dark .divider { background: linear-gradient(135deg, var(--accent), #fff); }
        /* ========== 小徽章 ========== */
        .badge-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
        .badge-dot.green { background: #10B981; }
        .badge-dot.orange { background: var(--accent); }
        /* ========== 列表内联 ========== */
        .inline-list { display: flex; flex-wrap: wrap; gap: 8px; }
        /* ========== 辅助 ========== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mt-24 { margin-top: 24px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-16 { gap: 16px; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #457b9d;
            --secondary-dark: #1d3557;
            --accent: #f4a261;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-dark: #1d3557;
            --text: #2b2d42;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border: #dee2e6;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 8px 30px rgba(0,0,0,0.08);
            --shadow-hover: 0 16px 48px rgba(0,0,0,0.14);
            --transition: all 0.3s ease;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

        /* ===== Header / Nav ===== */
        .site-header {
            background: var(--bg-alt);
            box-shadow: 0 2px 20px rgba(0,0,0,0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--nav-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }
        .logo i { font-size: 1.4rem; color: var(--accent); }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            transition: var(--transition);
            white-space: nowrap;
        }
        .header-nav a:hover,
        .header-nav a.active {
            background: var(--primary);
            color: #fff;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg);
            border-radius: 50px;
            padding: 6px 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(230,57,70,0.15);
        }
        .search-box input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            padding: 6px 0;
            width: 140px;
            color: var(--text);
        }
        .search-box i { color: var(--text-light); font-size: 0.9rem; }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230,57,70,0.35);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            color: var(--text);
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.9rem;
            border: 1.5px solid var(--border);
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(230,57,70,0.05);
        }

        /* ===== Article Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, var(--secondary-dark) 0%, var(--secondary) 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 20px;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }
        .article-meta {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px 40px;
            color: rgba(255,255,255,0.85);
            font-size: 0.95rem;
        }
        .article-meta i { margin-right: 6px; }
        .article-meta .badge {
            background: var(--accent);
            color: var(--text);
            padding: 4px 16px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 50px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 48px;
            box-shadow: var(--shadow);
        }
        .article-body p {
            margin-bottom: 1.6em;
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body h2, .article-body h3 {
            margin-top: 2em;
            margin-bottom: 0.8em;
            font-weight: 700;
            color: var(--secondary-dark);
        }
        .article-body h2 { font-size: 1.7rem; }
        .article-body h3 { font-size: 1.3rem; }
        .article-body ul, .article-body ol {
            margin-bottom: 1.6em;
            padding-left: 1.8em;
        }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.5em; line-height: 1.7; }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 2em 0;
            width: 100%;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(230,57,70,0.06);
            padding: 20px 28px;
            margin: 2em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 30px;
            border-top: 1px solid var(--border);
        }
        .tag {
            background: var(--bg);
            color: var(--text-light);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 36px;
        }
        .sidebar-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--secondary-dark);
            margin-bottom: 18px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            color: var(--text);
            font-weight: 500;
            line-height: 1.4;
        }
        .sidebar-list a:hover { color: var(--primary); }
        .sidebar-list .thumb {
            width: 70px;
            height: 50px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg);
        }
        .sidebar-list .meta {
            font-size: 0.85rem;
            color: var(--text-light);
            font-weight: 400;
            margin-top: 4px;
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            text-align: center;
            padding: 32px 24px;
        }
        .sidebar-cta h3 { color: #fff; margin-bottom: 12px; }
        .sidebar-cta p { font-size: 0.95rem; margin-bottom: 20px; opacity: 0.9; }
        .sidebar-cta .btn-primary {
            background: #fff;
            color: var(--primary);
            font-weight: 700;
        }
        .sidebar-cta .btn-primary:hover { background: var(--accent); color: var(--text); }

        /* ===== Article Nav (prev/next) ===== */
        .article-nav {
            margin-top: 40px;
            display: flex;
            justify-content: space-between;
            gap: 20px;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px 24px;
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            font-weight: 500;
            transition: var(--transition);
            flex: 1;
            min-width: 200px;
        }
        .article-nav a:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
            color: var(--primary);
        }
        .article-nav .prev i { margin-right: 6px; }
        .article-nav .next { text-align: right; justify-content: flex-end; }
        .article-nav .next i { margin-left: 6px; }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 80px 0;
            background: var(--bg-alt);
        }
        .faq-section .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        .faq-section .section-title h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--secondary-dark);
        }
        .faq-section .section-title p {
            color: var(--text-light);
            font-size: 1.1rem;
            margin-top: 10px;
        }
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            max-width: 900px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            transition: var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
        }
        .faq-item:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }
        .faq-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-item h4 i { color: var(--primary); font-size: 0.9rem; }
        .faq-item p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-top: 10px;
            line-height: 1.6;
            display: none;
        }
        .faq-item.active p { display: block; }
        .faq-item.active { border-color: var(--primary); }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, var(--secondary-dark) 0%, #0d1b2a 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.8);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-primary {
            background: var(--accent);
            color: var(--text);
            font-size: 1.1rem;
            padding: 14px 40px;
        }
        .cta-section .btn-primary:hover {
            background: #e9c46a;
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(244,162,97,0.4);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo i { color: var(--accent); }
        .footer-brand p { font-size: 0.92rem; line-height: 1.7; color: rgba(255,255,255,0.65); max-width: 340px; }
        .footer-col h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 6px; }
        .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: 16px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a {
            color: rgba(255,255,255,0.5);
            font-size: 1.3rem;
            transition: var(--transition);
        }
        .footer-social a:hover { color: var(--accent); transform: translateY(-2px); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .header-inner { flex-wrap: wrap; gap: 12px; padding: 0 16px; }
            .header-nav { order: 3; width: 100%; justify-content: center; padding: 6px 0; gap: 4px; }
            .header-nav a { padding: 6px 14px; font-size: 0.85rem; }
            .header-actions { gap: 8px; }
            .search-box input { width: 100px; }
            .btn-primary { padding: 8px 18px; font-size: 0.85rem; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-hero { padding: 50px 0 40px; }
            .article-body { padding: 24px; }
            .article-body p { font-size: 0.98rem; }
            .faq-grid { grid-template-columns: 1fr; }
            .cta-section h2 { font-size: 1.6rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .article-nav { flex-direction: column; }
            .article-nav a { min-width: auto; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.4rem; }
            .article-meta { font-size: 0.82rem; gap: 12px; }
            .article-body { padding: 16px; }
            .article-body h2 { font-size: 1.3rem; }
            .sidebar-card { padding: 20px 16px; }
            .header-nav a { padding: 4px 10px; font-size: 0.78rem; }
            .search-box input { width: 80px; font-size: 0.8rem; }
        }

        /* ===== Misc ===== */
        .not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found h2 { font-size: 2rem; color: var(--primary); margin-bottom: 16px; }
        .not-found p { color: var(--text-light); margin-bottom: 24px; }
        .not-found a { color: var(--primary); font-weight: 600; }
        .section-title { text-align: center; margin-bottom: 40px; }
        .section-title h2 { font-size: 2rem; font-weight: 800; color: var(--secondary-dark); }
        .section-title p { color: var(--text-light); font-size: 1.05rem; margin-top: 8px; }
        .breadcrumb {
            display: flex;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-light);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: rgba(255,255,255,0.7); }
        .breadcrumb a:hover { color: #fff; }
        .breadcrumb span { color: rgba(255,255,255,0.9); }
        .breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.4); }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #fadbd8;
            --secondary: #2ecc71;
            --secondary-dark: #27ae60;
            --accent: #f39c12;
            --bg: #0d0d0d;
            --bg-alt: #1a1a1a;
            --bg-card: #222222;
            --bg-elevated: #2a2a2a;
            --text: #f5f5f5;
            --text-muted: #aaaaaa;
            --text-soft: #cccccc;
            --border: #333333;
            --border-light: #444444;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 30px rgba(231, 76, 60, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --nav-height: 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-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-xs);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(13, 13, 13, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            transition: background var(--transition), border-color var(--transition);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo a {
            color: inherit;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo a:hover {
            color: inherit;
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }
        .header-nav a {
            color: var(--text-soft);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-xs);
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .header-nav a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
        }
        .header-nav a.active {
            color: var(--text);
            background: rgba(231, 76, 60, 0.15);
        }
        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-actions .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 50px;
            padding: 0 16px;
            transition: all var(--transition);
        }
        .header-actions .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.15);
        }
        .header-actions .search-box input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text);
            padding: 8px 8px 8px 0;
            width: 140px;
            font-size: 14px;
        }
        .header-actions .search-box input::placeholder {
            color: var(--text-muted);
        }
        .header-actions .search-box i {
            color: var(--text-muted);
            font-size: 14px;
        }
        .header-actions .btn-login {
            color: var(--text-soft);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 14px;
            transition: all var(--transition);
        }
        .header-actions .btn-login:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
        }
        .header-actions .btn-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 14px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-actions .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(231, 76, 60, 0.3);
            color: #fff;
        }
        .header-actions .btn-cta:active {
            transform: translateY(0);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-xs);
        }
        .mobile-toggle:focus-visible {
            outline: 2px solid var(--primary);
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            width: 100%;
            background: rgba(13, 13, 13, 0.98);
            backdrop-filter: blur(20px);
            padding: 16px 24px 24px;
            border-bottom: 1px solid var(--border);
            z-index: 999;
            flex-direction: column;
            gap: 8px;
            transform: translateY(-10px);
            opacity: 0;
            transition: all 0.3s ease;
            pointer-events: none;
        }
        .mobile-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
            display: flex;
        }
        .mobile-nav a {
            color: var(--text-soft);
            font-size: 17px;
            font-weight: 500;
            padding: 12px 16px;
            border-radius: var(--radius-xs);
            transition: all var(--transition);
        }
        .mobile-nav a:hover {
            color: var(--text);
            background: rgba(255, 255, 255, 0.06);
        }
        .mobile-nav a.active {
            color: var(--primary);
            background: rgba(231, 76, 60, 0.1);
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            overflow: hidden;
            background: linear-gradient(135deg, #0d0d0d 0%, #1a0a0a 50%, #0d0d0d 100%);
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
            filter: saturate(0.8) brightness(0.6);
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(231, 76, 60, 0.12) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 50%, rgba(46, 204, 113, 0.08) 0%, transparent 70%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .hero-content .badge {
            display: inline-block;
            background: rgba(231, 76, 60, 0.18);
            color: var(--primary);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(231, 76, 60, 0.2);
            backdrop-filter: blur(4px);
        }
        .hero-content h1 {
            font-size: 52px;
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #fff 30%, var(--primary-light) 70%, var(--accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 20px;
            color: var(--text-soft);
            max-width: 640px;
            margin: 0 auto 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-actions .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 700;
            padding: 16px 40px;
            border-radius: 50px;
            font-size: 17px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(231, 76, 60, 0.35);
            color: #fff;
        }
        .hero-actions .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text);
            font-weight: 600;
            padding: 16px 36px;
            border-radius: 50px;
            font-size: 17px;
            border: 1px solid var(--border-light);
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--text-muted);
            color: var(--text);
            transform: translateY(-3px);
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            justify-content: center;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-number {
            font-size: 36px;
            font-weight: 900;
            color: var(--text);
            line-height: 1.2;
        }
        .hero-stats .stat-number i {
            color: var(--primary);
            font-size: 28px;
            margin-right: 6px;
        }
        .hero-stats .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-title {
            font-size: 36px;
            font-weight: 800;
            text-align: center;
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 18px;
            color: var(--text-muted);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-title-left {
            text-align: left;
        }
        .section-subtitle-left {
            text-align: left;
            margin-left: 0;
        }

        /* ===== Features Grid ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-light);
            box-shadow: var(--shadow);
            background: var(--bg-elevated);
        }
        .feature-card .icon {
            font-size: 40px;
            color: var(--primary);
            margin-bottom: 16px;
            display: block;
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Showcase / Cards ===== */
        .showcase-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .showcase-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .showcase-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-light);
            box-shadow: var(--shadow);
        }
        .showcase-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            border-radius: 0;
        }
        .showcase-card .card-body {
            padding: 20px 22px 24px;
        }
        .showcase-card .card-tag {
            display: inline-block;
            background: rgba(231, 76, 60, 0.12);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
        }
        .showcase-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .showcase-card .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .showcase-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .showcase-card .card-meta i {
            margin-right: 4px;
        }

        /* ===== Scenarios ===== */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scenario-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 28px;
            border: 1px solid var(--border);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .scenario-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary), var(--accent));
            border-radius: 0 2px 2px 0;
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .scenario-card .num {
            font-size: 32px;
            font-weight: 900;
            color: rgba(231, 76, 60, 0.2);
            line-height: 1;
            margin-bottom: 8px;
        }
        .scenario-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .scenario-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 12%;
            right: 12%;
            height: 2px;
            background: linear-gradient(to right, var(--primary), var(--secondary), var(--accent));
            opacity: 0.3;
            z-index: 0;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid var(--border);
            position: relative;
            z-index: 1;
            transition: all var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .step-card .step-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(231, 76, 60, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 26px;
            color: var(--primary);
            transition: all var(--transition);
        }
        .step-card:hover .step-icon {
            background: rgba(231, 76, 60, 0.2);
            transform: scale(1.05);
        }
        .step-card .step-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .step-card h3 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            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);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text);
            transition: all var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: inherit;
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-soft);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a0a0a, #0d0d0d, #0a1a0a);
            text-align: center;
            padding: 80px 24px;
            position: relative;
            overflow: hidden;
        }
        .cta-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;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 38px;
            font-weight: 900;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 18px;
            color: var(--text-soft);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta-big {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 700;
            padding: 18px 48px;
            border-radius: 50px;
            font-size: 18px;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 12px;
        }
        .cta-section .btn-cta-big:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(231, 76, 60, 0.35);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-alt);
            border-top: 1px solid var(--border);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border);
        }
        .footer-brand .logo {
            font-size: 22px;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text);
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--text-muted);
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0 32px;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span {
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            color: var(--text-muted);
            font-size: 20px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .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-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .hero-content h1 {
                font-size: 40px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }
            .header-nav {
                display: none;
            }
            .header-actions .search-box {
                display: none;
            }
            .header-actions .btn-login {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-section {
                min-height: 60vh;
                padding: 100px 20px 60px;
            }
            .hero-content h1 {
                font-size: 32px;
            }
            .hero-content p {
                font-size: 17px;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                padding: 14px 28px;
                font-size: 15px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats .stat-number {
                font-size: 28px;
            }
            .section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 28px;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .showcase-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .process-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            .cta-section .btn-cta-big {
                padding: 16px 32px;
                font-size: 16px;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 14px;
            }
        }

        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 26px;
            }
            .hero-content p {
                font-size: 15px;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 24px;
            }
            .header-actions .btn-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
            .header-actions .btn-cta span {
                display: none;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Foundation Overrides ===== */
        .grid-container {
            max-width: var(--container);
            padding-left: 24px;
            padding-right: 24px;
        }
        .cell {
            margin-bottom: 0;
        }
        .grid-x>.cell {
            padding: 0;
        }