/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00d4ff;
            --primary-glow: rgba(0, 212, 255, 0.35);
            --secondary: #7c3aed;
            --secondary-glow: rgba(124, 58, 237, 0.35);
            --accent: #06b6d4;
            --bg-dark: #0a0e17;
            --bg-card: #111827;
            --bg-elevated: #1a1f2e;
            --bg-input: #0f1522;
            --text-primary: #f1f5f9;
            --text-secondary: #94a3b8;
            --text-muted: #64748b;
            --border-color: #1e293b;
            --border-glow: rgba(0, 212, 255, 0.2);
            --radius-sm: 0.375rem;
            --radius-md: 0.75rem;
            --radius-lg: 1.25rem;
            --radius-xl: 1.75rem;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-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);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: #fff; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.15rem, 2.2vw, 1.5rem); }
        p { color: var(--text-secondary); margin-bottom: 1rem; }
        ::selection { background: var(--primary); color: #000; }
        :focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 4px; }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        @media (min-width: 768px) { .container { padding: 0 2.5rem; } }
        @media (min-width: 1200px) { .container { padding: 0 3rem; } }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.92);
            backdrop-filter: blur(18px) saturate(1.2);
            border-bottom: 1px solid rgba(30, 41, 59, 0.6);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6); border-bottom-color: var(--border-glow); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.65rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.02em;
            transition: var(--transition);
        }
        .logo i { color: var(--primary); font-size: 1.5rem; filter: drop-shadow(0 0 8px var(--primary-glow)); }
        .logo:hover { color: var(--primary); }
        .logo span { background: linear-gradient(135deg, #fff 40%, var(--primary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list { display: flex; align-items: center; gap: 0.25rem; }
        .nav-list a {
            display: inline-flex;
            align-items: center;
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-md);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.925rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-list a i { margin-right: 0.45rem; font-size: 0.9rem; }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2.5px;
            border-radius: 4px;
            background: var(--primary);
            box-shadow: 0 0 12px var(--primary-glow);
            transition: var(--transition);
        }
        .nav-list a:hover { color: #fff; background: rgba(255,255,255,0.04); }
        .nav-list a:hover::after { width: 60%; }
        .nav-list a.active {
            color: var(--primary);
            background: rgba(0, 212, 255, 0.08);
        }
        .nav-list a.active::after { width: 70%; }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.55rem 1.5rem;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff !important;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
            transition: var(--transition);
            margin-left: 0.75rem;
        }
        .nav-cta::after { display: none !important; }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 35px rgba(0, 212, 255, 0.4); background: linear-gradient(135deg, #00e5ff, #8b5cf6); }
        .nav-toggle { display: none; font-size: 1.6rem; color: var(--text-primary); background: none; border: none; padding: 0.35rem; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition); }
        .nav-toggle:hover { color: var(--primary); background: rgba(255,255,255,0.05); }

        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-list { position: fixed; top: var(--header-height); left: 0; right: 0; background: rgba(10, 14, 23, 0.98); backdrop-filter: blur(20px); flex-direction: column; padding: 1rem 1.5rem 1.8rem; gap: 0.2rem; border-bottom: 2px solid var(--border-glow); transform: translateY(-120%); opacity: 0; pointer-events: none; transition: var(--transition); box-shadow: 0 20px 60px rgba(0,0,0,0.7); }
            .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav-list a { width: 100%; padding: 0.75rem 1rem; border-radius: var(--radius-md); font-size: 1rem; }
            .nav-list a::after { display: none; }
            .nav-list a.active { background: rgba(0, 212, 255, 0.12); border-left: 3px solid var(--primary); }
            .nav-cta { margin-left: 0; margin-top: 0.5rem; width: 100%; justify-content: center; padding: 0.75rem; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 95vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 8rem 1.5rem 4rem;
            overflow: hidden;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(10,14,23,0.45) 0%, rgba(10,14,23,0.88) 80%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, var(--bg-dark) 100%);
            z-index: 1;
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.35rem 1.2rem;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.25);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 1.8rem;
            backdrop-filter: blur(4px);
        }
        .hero-badge i { font-size: 0.75rem; }
        .hero h1 { color: #fff; margin-bottom: 1.2rem; text-shadow: 0 2px 30px rgba(0,0,0,0.5); }
        .hero h1 .highlight { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p {
            font-size: clamp(1.05rem, 2vw, 1.35rem);
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 2.2rem;
            text-shadow: 0 1px 20px rgba(0,0,0,0.4);
        }
        .hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }
        .btn-primary, .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            padding: 0.85rem 2.2rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 6px 30px rgba(0, 212, 255, 0.3);
        }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 45px rgba(0, 212, 255, 0.45); color: #fff; }
        .btn-secondary {
            background: rgba(255,255,255,0.06);
            color: var(--text-primary);
            border: 1px solid rgba(255,255,255,0.12);
            backdrop-filter: blur(4px);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.12); border-color: var(--primary); color: var(--primary); transform: translateY(-3px); }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 2.5rem 3.5rem;
            margin-top: 3.5rem;
            padding-top: 2.5rem;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .hero-stat { text-align: center; }
        .hero-stat .num { font-size: 1.8rem; font-weight: 800; color: #fff; letter-spacing: -0.02em; }
        .hero-stat .num i { color: var(--primary); margin-right: 0.3rem; font-size: 1.3rem; }
        .hero-stat .label { font-size: 0.85rem; color: var(--text-muted); margin-top: 0.15rem; }

        @media (max-width: 640px) {
            .hero { min-height: 85vh; padding: 6rem 1rem 3rem; }
            .hero-stats { gap: 1.5rem 2rem; }
            .hero-stat .num { font-size: 1.4rem; }
            .btn-primary, .btn-secondary { padding: 0.7rem 1.5rem; font-size: 0.9rem; }
        }

        /* ===== Section ===== */
        .section { padding: 5rem 0; }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 1rem;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.15);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.02em;
            margin-bottom: 1rem;
        }
        .section-title { text-align: center; max-width: 720px; margin: 0 auto 0.8rem; }
        .section-desc { text-align: center; max-width: 620px; margin: 0 auto 3rem; font-size: 1.05rem; color: var(--text-muted); }

        @media (max-width: 768px) { .section { padding: 3.5rem 0; } }

        /* ===== 平台简介 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .intro-content h2 { margin-bottom: 1.2rem; }
        .intro-content p { font-size: 1.05rem; line-height: 1.8; }
        .intro-features { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 1.5rem; }
        .intro-feat {
            display: flex;
            align-items: center;
            gap: 0.7rem;
            padding: 0.7rem 1rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .intro-feat i { color: var(--primary); font-size: 1.1rem; }
        .intro-feat span { font-size: 0.9rem; font-weight: 500; color: var(--text-primary); }
        .intro-feat:hover { border-color: var(--primary); transform: translateX(4px); }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
        }
        .intro-image img { width: 100%; height: 100%; object-fit: cover; min-height: 300px; }

        @media (max-width: 900px) { .intro-grid { grid-template-columns: 1fr; gap: 2rem; } .intro-image { order: -1; } .intro-features { grid-template-columns: 1fr; } }

        /* ===== 分类入口 ===== */
        .cat-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }
        .cat-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-card);
            min-height: 340px;
            display: flex;
            flex-direction: column;
        }
        .cat-card:hover { transform: translateY(-6px); border-color: var(--primary); box-shadow: var(--shadow-glow); }
        .cat-card .cat-img {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        .cat-card .cat-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .cat-card:hover .cat-img img { transform: scale(1.05); }
        .cat-card .cat-img::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0; right: 0;
            height: 60%;
            background: linear-gradient(transparent, var(--bg-card));
        }
        .cat-card .cat-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .cat-card .cat-body h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
        .cat-card .cat-body p { font-size: 0.9rem; color: var(--text-muted); flex: 1; }
        .cat-card .cat-body .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            margin-top: 1rem;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .cat-card .cat-body .cat-link i { transition: var(--transition); }
        .cat-card .cat-body .cat-link:hover i { transform: translateX(4px); }
        .cat-tag {
            position: absolute;
            top: 1rem;
            left: 1rem;
            z-index: 3;
            padding: 0.25rem 0.9rem;
            border-radius: 50px;
            background: rgba(0, 212, 255, 0.2);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(0, 212, 255, 0.3);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 500;
        }

        @media (max-width: 768px) { .cat-grid { grid-template-columns: 1fr; gap: 1.5rem; } }

        /* ===== 最新资讯 (CMS列表) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.8rem;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: var(--shadow-glow); }
        .news-card .news-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .news-card .news-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .news-card:hover .news-img img { transform: scale(1.05); }
        .news-card .news-body { padding: 1.3rem 1.5rem 1.5rem; flex: 1; display: flex; flex-direction: column; }
        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 0.6rem;
        }
        .news-card .news-meta .cat-tag-sm {
            padding: 0.15rem 0.7rem;
            border-radius: 50px;
            background: rgba(124, 58, 237, 0.15);
            color: var(--secondary);
            font-weight: 500;
            font-size: 0.7rem;
        }
        .news-card .news-body h3 { font-size: 1.05rem; margin-bottom: 0.5rem; line-height: 1.4; }
        .news-card .news-body h3 a { color: var(--text-primary); transition: var(--transition); }
        .news-card .news-body h3 a:hover { color: var(--primary); }
        .news-card .news-body p { font-size: 0.88rem; color: var(--text-muted); flex: 1; margin-bottom: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card .news-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.8rem 1.5rem 1rem;
            border-top: 1px solid rgba(255,255,255,0.04);
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .news-card .news-footer a { color: var(--primary); font-weight: 500; }
        .news-card .news-footer a:hover { color: #fff; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 4rem 2rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border-color);
            color: var(--text-muted);
        }
        .news-empty i { font-size: 2.5rem; color: var(--primary); margin-bottom: 1rem; opacity: 0.5; }

        @media (max-width: 1024px) { .news-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 640px) { .news-grid { grid-template-columns: 1fr; } }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .stat-card:hover { transform: translateY(-4px); border-color: var(--primary); box-shadow: var(--shadow-glow); }
        .stat-card .stat-icon {
            width: 56px;
            height: 56px;
            margin: 0 auto 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: rgba(0, 212, 255, 0.08);
            border: 1px solid rgba(0, 212, 255, 0.15);
            font-size: 1.4rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .stat-card:hover .stat-icon { background: rgba(0, 212, 255, 0.15); border-color: var(--primary); }
        .stat-card .stat-num { font-size: 2.2rem; font-weight: 800; color: #fff; letter-spacing: -0.02em; }
        .stat-card .stat-label { font-size: 0.9rem; color: var(--text-muted); margin-top: 0.3rem; }

        @media (max-width: 1024px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

        /* ===== 特色服务 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover::before { opacity: 1; }
        .feature-card:hover { transform: translateY(-5px); border-color: var(--primary); box-shadow: var(--shadow-glow); }
        .feature-card .feat-icon {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-md);
            background: rgba(0, 212, 255, 0.08);
            color: var(--primary);
            font-size: 1.2rem;
            margin-bottom: 1.2rem;
            transition: var(--transition);
        }
        .feature-card:hover .feat-icon { background: rgba(0, 212, 255, 0.18); }
        .feature-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
        .feature-card p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 0; }

        @media (max-width: 1024px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 640px) { .features-grid { grid-template-columns: 1fr; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(0, 212, 255, 0.2); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 1.5rem;
            color: var(--text-primary);
            font-weight: 500;
            font-size: 1rem;
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            gap: 1rem;
        }
        .faq-question i { color: var(--primary); font-size: 0.85rem; transition: var(--transition); flex-shrink: 0; }
        .faq-question:hover { color: var(--primary); }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.active .faq-answer { display: block; }
        .faq-item.active { border-color: rgba(0, 212, 255, 0.25); }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), rgba(124, 58, 237, 0.05));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-box {
            max-width: 720px;
            margin: 0 auto;
            text-align: center;
            padding: 2rem 0;
        }
        .cta-box h2 { margin-bottom: 1rem; }
        .cta-box p { font-size: 1.05rem; margin-bottom: 2rem; }
        .cta-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
            padding: 3.5rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        .footer-brand .logo { font-size: 1.2rem; margin-bottom: 0.8rem; }
        .footer-brand p { font-size: 0.88rem; color: var(--text-muted); max-width: 300px; }
        .footer-col h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 1.2rem; color: var(--text-primary); }
        .footer-col ul li { margin-bottom: 0.5rem; }
        .footer-col ul li a { color: var(--text-muted); font-size: 0.88rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 1.5rem;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary); }
        .footer-socials { display: flex; gap: 0.8rem; }
        .footer-socials a {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.04);
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .footer-socials a:hover { background: rgba(0, 212, 255, 0.1); color: var(--primary); border-color: rgba(0, 212, 255, 0.2); }

        @media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; } .footer-bottom { flex-direction: column; gap: 0.8rem; text-align: center; } }

        /* ===== 滚动动画辅助 ===== */
        .fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
        .fade-up.visible { opacity: 1; transform: translateY(0); }

        /* ===== 额外响应式 ===== */
        @media (max-width: 480px) {
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 0.95rem; }
            .section-title { font-size: 1.4rem; }
            .stat-card .stat-num { font-size: 1.6rem; }
            .btn-primary, .btn-secondary { padding: 0.6rem 1.2rem; font-size: 0.85rem; }
            .news-card .news-body { padding: 1rem 1.2rem 1.2rem; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00d4ff;
            --primary-glow: rgba(0, 212, 255, 0.25);
            --primary-dim: rgba(0, 212, 255, 0.1);
            --secondary: #a855f7;
            --secondary-glow: rgba(168, 85, 247, 0.25);
            --accent: #f59e0b;
            --bg-deep: #070714;
            --bg-dark: #0a0a1a;
            --bg-card: #0f0f2a;
            --bg-card-hover: #16163a;
            --bg-elevated: #1a1a3a;
            --text-light: #f1f5f9;
            --text-body: #cbd5e1;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --border-glow: rgba(0, 212, 255, 0.15);
            --border-active: rgba(0, 212, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 12px rgba(0, 212, 255, 0.05);
            --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.12);
            --shadow-glow-secondary: 0 0 30px rgba(168, 85, 247, 0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        /* ===== 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-deep);
            color: var(--text-body);
            line-height: 1.7;
            font-size: 16px;
            min-height: 100vh;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(7, 7, 20, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-glow);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(7, 7, 20, 0.98);
            border-bottom-color: var(--border-active);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-light);
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.5px;
            transition: var(--transition);
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--primary);
            filter: drop-shadow(0 0 8px var(--primary-glow));
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.85;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a i {
            font-size: 0.9rem;
        }
        .nav-list a:hover {
            color: var(--text-light);
            background: var(--primary-dim);
        }
        .nav-list a.active {
            color: var(--primary);
            background: var(--primary-dim);
            box-shadow: inset 0 -2px 0 var(--primary), 0 0 16px var(--primary-glow);
        }
        .nav-list a.active i {
            color: var(--primary);
            text-shadow: 0 0 8px var(--primary-glow);
        }
        .nav-list a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 700;
            padding: 8px 24px;
            border-radius: var(--radius-sm);
            box-shadow: 0 0 20px var(--primary-glow);
            margin-left: 8px;
        }
        .nav-list a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px var(--primary-glow), 0 6px 20px rgba(0, 212, 255, 0.2);
        }
        .nav-list a.nav-cta i {
            color: #fff;
        }

        .nav-toggle {
            display: none;
            font-size: 1.6rem;
            color: var(--text-light);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--primary-dim);
            color: var(--primary);
        }

        /* ===== Hero 首屏 ===== */
        .hero-category {
            padding: 140px 0 80px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
            min-height: 480px;
            display: flex;
            align-items: center;
        }
        .hero-category::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;
            filter: blur(2px) brightness(0.5);
        }
        .hero-category::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(7, 7, 20, 0.92) 0%, rgba(10, 10, 26, 0.7) 50%, rgba(7, 7, 20, 0.92) 100%);
            z-index: 1;
        }
        .hero-category .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .hero-category h1 {
            font-size: 3.2rem;
            font-weight: 900;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: 1px;
        }
        .hero-category .hero-tagline {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .hero-category .hero-badges {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }
        .hero-category .hero-badges span {
            padding: 6px 20px;
            border-radius: 30px;
            background: var(--primary-dim);
            border: 1px solid var(--border-glow);
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            backdrop-filter: blur(4px);
        }
        .hero-category .hero-badges span i {
            font-size: 0.85rem;
        }

        /* ===== 通用板块标题 ===== */
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            background: linear-gradient(135deg, var(--text-light), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .section-line {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 16px auto 0;
            box-shadow: 0 0 16px var(--primary-glow);
        }

        /* ===== 板块间距 ===== */
        .section-pad {
            padding: 80px 0;
        }
        .section-pad-sm {
            padding: 56px 0;
        }

        /* ===== 概览板块 ===== */
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .overview-text h3 {
            font-size: 1.8rem;
            margin-bottom: 16px;
            color: var(--text-light);
        }
        .overview-text p {
            color: var(--text-muted);
            margin-bottom: 16px;
            font-size: 1.05rem;
            line-height: 1.8;
        }
        .overview-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .overview-stats .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 24px 16px;
            text-align: center;
            transition: var(--transition);
        }
        .overview-stats .stat-item:hover {
            border-color: var(--border-active);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .overview-stats .stat-item .stat-num {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary);
            display: block;
            line-height: 1.2;
        }
        .overview-stats .stat-item .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 6px;
        }

        /* ===== 指南卡片网格 ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .guide-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-active);
            box-shadow: var(--shadow-card), var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .guide-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .guide-card .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text-light);
        }
        .guide-card .card-body p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }
        .guide-card .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            background: var(--primary-dim);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid var(--border-glow);
            align-self: flex-start;
        }
        .guide-card .card-footer-link {
            margin-top: 12px;
            color: var(--secondary);
            font-weight: 600;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .guide-card .card-footer-link:hover {
            color: var(--primary);
            gap: 10px;
        }

        /* ===== 热门教程列表 ===== */
        .tutorial-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .tutorial-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: var(--transition);
            align-items: flex-start;
        }
        .tutorial-item:hover {
            border-color: var(--border-active);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }
        .tutorial-item .tut-img {
            width: 120px;
            height: 80px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            border: 1px solid var(--border-glow);
        }
        .tutorial-item .tut-content {
            flex: 1;
        }
        .tutorial-item .tut-content h4 {
            font-size: 1.05rem;
            margin-bottom: 6px;
            color: var(--text-light);
        }
        .tutorial-item .tut-content p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
            margin-bottom: 8px;
        }
        .tutorial-item .tut-meta {
            display: flex;
            gap: 14px;
            font-size: 0.82rem;
            color: var(--text-dim);
        }
        .tutorial-item .tut-meta i {
            color: var(--primary);
            margin-right: 4px;
        }

        /* ===== 使用流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-md);
            padding: 32px 20px 24px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            border-color: var(--border-active);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .step-card::before {
            counter-increment: step-counter;
            content: counter(step-counter);
            position: absolute;
            top: -14px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px var(--primary-glow);
        }
        .step-card .step-icon {
            font-size: 2.4rem;
            color: var(--primary);
            margin-bottom: 16px;
            margin-top: 8px;
            filter: drop-shadow(0 0 10px var(--primary-glow));
        }
        .step-card h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--text-light);
        }
        .step-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-active);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--text-light);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 12px;
            transition: var(--transition);
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary i {
            color: var(--primary);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .faq-item details[open] summary i {
            transform: rotate(90deg);
        }
        .faq-item summary:hover {
            background: var(--primary-dim);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-muted);
            line-height: 1.8;
            font-size: 0.95rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-glow);
            border-bottom: 1px solid var(--border-glow);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 16px 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 700;
            font-size: 1.1rem;
            box-shadow: 0 0 30px var(--primary-glow);
            transition: var(--transition);
        }
        .cta-section .cta-btn:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 0 40px var(--primary-glow), 0 8px 30px rgba(0, 212, 255, 0.25);
            color: #fff;
        }
        .cta-section .cta-btn i {
            font-size: 1.2rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-glow);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.25rem;
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-glow);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span {
            color: var(--text-dim);
            font-size: 0.88rem;
        }
        .footer-bottom span a {
            color: var(--text-muted);
        }
        .footer-bottom span a:hover {
            color: var(--primary);
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary-dim);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-3px);
            box-shadow: 0 0 16px var(--primary-glow);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background: rgba(7, 7, 20, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border-glow);
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav-list a.nav-cta {
                margin-left: 0;
                margin-top: 8px;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }

            .hero-category {
                padding: 110px 0 56px;
                min-height: 360px;
            }
            .hero-category h1 {
                font-size: 2.2rem;
            }
            .hero-category .hero-tagline {
                font-size: 1rem;
            }

            .section-header h2 {
                font-size: 1.7rem;
            }
            .section-pad {
                padding: 56px 0;
            }
            .section-pad-sm {
                padding: 40px 0;
            }

            .overview-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .overview-stats {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }
            .overview-stats .stat-item {
                padding: 16px 8px;
            }
            .overview-stats .stat-item .stat-num {
                font-size: 1.6rem;
            }

            .guide-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .guide-card .card-img {
                height: 130px;
            }

            .tutorial-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .tutorial-item {
                flex-direction: column;
                padding: 16px;
            }
            .tutorial-item .tut-img {
                width: 100%;
                height: 140px;
            }

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

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-category h1 {
                font-size: 1.7rem;
            }
            .hero-category .hero-badges span {
                font-size: 0.78rem;
                padding: 4px 14px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .overview-stats {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section .cta-btn {
                padding: 14px 28px;
                font-size: 1rem;
            }
            .faq-item summary {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-item .faq-answer {
                padding: 0 16px 14px;
                font-size: 0.9rem;
            }
        }

/* roulang page: article */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #6c2bd9;
            --primary-light: #8b5cf6;
            --primary-dark: #4c1d95;
            --primary-glow: rgba(108, 43, 217, 0.4);
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #06b6d4;
            --bg-dark: #0f0e1a;
            --bg-mid: #1a1730;
            --bg-card: #1e1b3a;
            --bg-surface: #252148;
            --text-white: #f1f0fa;
            --text-light: #c9c5e6;
            --text-muted: #8b86b0;
            --border-color: #2e2952;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.25);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.35);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 30px rgba(108, 43, 217, 0.25);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --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-sans);
            background: var(--bg-dark);
            color: var(--text-white);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--secondary-light); }
        a:focus-visible { outline: 2px solid var(--primary-light); outline-offset: 3px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: 1rem; }
        ul { list-style: none; }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== Header / 暗色霓虹导航 ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(15, 14, 26, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 20px rgba(0,0,0,0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: 0.5px;
            transition: color var(--transition);
        }
        .logo i { color: var(--primary-light); font-size: 1.6rem; filter: drop-shadow(0 0 8px var(--primary-glow)); }
        .logo span { background: linear-gradient(135deg, #f1f0fa, #c9c5e6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { color: var(--primary-light); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            position: relative;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 7px;
        }
        .nav-list a i { font-size: 0.9rem; }
        .nav-list a:hover {
            color: var(--text-white);
            background: rgba(108, 43, 217, 0.15);
        }
        .nav-list a.active {
            color: var(--text-white);
            background: rgba(108, 43, 217, 0.2);
            box-shadow: inset 0 -2px 0 var(--primary-light), 0 0 20px var(--primary-glow);
        }
        .nav-list a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 8px 22px;
            font-weight: 600;
            box-shadow: 0 0 20px var(--primary-glow);
            border: 1px solid rgba(139, 92, 246, 0.3);
        }
        .nav-list a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px var(--primary-glow);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: rgba(108, 43, 217, 0.15); }
        @media (max-width: 820px) {
            .nav-toggle { display: block; }
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0; right: 0;
                background: rgba(15, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                box-shadow: 0 20px 40px rgba(0,0,0,0.6);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                padding: 12px 18px;
                font-size: 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-list a.nav-cta { margin-top: 8px; text-align: center; justify-content: center; }
        }

        /* ===== 文章 Banner ===== */
        .article-banner {
            margin-top: var(--header-h);
            padding: 60px 0 50px;
            background: linear-gradient(135deg, #1a1730 0%, #0f0e1a 60%, #12102a 100%);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--primary-light); }
        .article-breadcrumb span { color: var(--text-light); }
        .article-breadcrumb i { font-size: 0.75rem; }
        .article-category-badge {
            display: inline-block;
            background: rgba(108, 43, 217, 0.2);
            color: var(--primary-light);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            border: 1px solid rgba(108, 43, 217, 0.25);
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .article-title {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-white);
            margin-bottom: 16px;
            max-width: 880px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
            align-items: center;
        }
        .article-meta i { margin-right: 5px; color: var(--primary-light); }
        .article-meta span { display: flex; align-items: center; }
        .article-meta .author-name { color: var(--text-light); font-weight: 500; }

        @media (max-width: 768px) {
            .article-banner { padding: 40px 0 32px; }
            .article-title { font-size: 1.7rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
        }
        @media (max-width: 520px) {
            .article-title { font-size: 1.35rem; }
            .article-banner { padding: 32px 0 24px; }
        }

        /* ===== 文章主体 ===== */
        .article-main {
            padding: 50px 0 70px;
            flex: 1;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
        }
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; gap: 36px; }
        }

        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 44px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .article-content .post-body {
            color: var(--text-light);
            font-size: 1.05rem;
            line-height: 1.85;
        }
        .article-content .post-body h2,
        .article-content .post-body h3 {
            color: var(--text-white);
            margin-top: 32px;
            margin-bottom: 14px;
            font-weight: 700;
        }
        .article-content .post-body h2 { font-size: 1.6rem; border-left: 4px solid var(--primary-light); padding-left: 16px; }
        .article-content .post-body h3 { font-size: 1.3rem; }
        .article-content .post-body p { margin-bottom: 18px; }
        .article-content .post-body ul,
        .article-content .post-body ol { margin-bottom: 18px; padding-left: 24px; }
        .article-content .post-body li { margin-bottom: 8px; }
        .article-content .post-body a { color: var(--primary-light); text-decoration: underline; text-underline-offset: 3px; }
        .article-content .post-body a:hover { color: var(--secondary-light); }
        .article-content .post-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(108, 43, 217, 0.08);
            padding: 16px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-content .post-body img {
            border-radius: var(--radius-sm);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content .post-body code {
            background: rgba(108, 43, 217, 0.15);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--secondary-light);
        }
        .article-content .post-body pre {
            background: #0a0914;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            border: 1px solid var(--border-color);
            margin: 24px 0;
        }
        .article-content .post-body pre code { background: none; padding: 0; color: var(--text-light); }

        .article-not-found {
            text-align: center;
            padding: 60px 20px;
        }
        .article-not-found i { font-size: 3.6rem; color: var(--text-muted); margin-bottom: 20px; display: block; }
        .article-not-found h2 { font-size: 1.8rem; color: var(--text-white); margin-bottom: 12px; }
        .article-not-found p { color: var(--text-muted); margin-bottom: 24px; max-width: 480px; margin-left: auto; margin-right: auto; }
        .article-not-found .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all var(--transition);
        }
        .article-not-found .btn-back:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 0 20px var(--primary-glow); }

        /* ===== 侧栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 26px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary-light); }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(46, 41, 82, 0.4);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .sidebar-list a:hover { color: var(--primary-light); }
        .sidebar-list .list-num {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            background: rgba(108, 43, 217, 0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary-light);
        }
        .sidebar-list .list-text { flex: 1; }
        .sidebar-list .list-title { display: block; font-weight: 500; font-size: 0.92rem; }
        .sidebar-list .list-date { display: block; font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            background: rgba(108, 43, 217, 0.1);
            color: var(--text-light);
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            border: 1px solid rgba(46, 41, 82, 0.5);
            transition: all var(--transition);
        }
        .sidebar-tags a:hover { background: rgba(108, 43, 217, 0.25); color: var(--text-white); border-color: var(--primary); }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary-dark), #2d1b69);
            border-color: rgba(108, 43, 217, 0.3);
            text-align: center;
        }
        .sidebar-cta h3 { justify-content: center; }
        .sidebar-cta p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; }
        .sidebar-cta .btn-sidebar {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all var(--transition);
        }
        .sidebar-cta .btn-sidebar:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: 0 0 20px var(--primary-glow); }

        @media (max-width: 1024px) {
            .article-content { padding: 28px 24px; }
        }
        @media (max-width: 520px) {
            .article-content { padding: 20px 16px; }
            .article-content .post-body { font-size: 0.95rem; }
            .sidebar-card { padding: 18px 16px; }
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 0 0 60px;
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 28px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-section .section-title i { color: var(--primary-light); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(108, 43, 217, 0.3); }
        .related-card img { width: 100%; height: 170px; object-fit: cover; }
        .related-card .card-body { padding: 18px 20px 22px; }
        .related-card .card-body h4 { font-size: 1rem; font-weight: 600; color: var(--text-white); margin-bottom: 8px; line-height: 1.4; }
        .related-card .card-body h4 a { color: inherit; }
        .related-card .card-body h4 a:hover { color: var(--primary-light); }
        .related-card .card-body p { font-size: 0.85rem; color: var(--text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 12px; font-size: 0.78rem; color: var(--text-muted); }
        .related-card .card-meta .tag { background: rgba(108, 43, 217, 0.12); color: var(--primary-light); padding: 2px 12px; border-radius: 12px; font-size: 0.75rem; }

        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 600px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-card img { height: 200px; }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a0914;
            border-top: 1px solid var(--border-color);
            padding: 56px 0 30px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand .logo { margin-bottom: 14px; font-size: 1.2rem; }
        .footer-brand p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: var(--text-white); font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; letter-spacing: 0.3px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul a { color: var(--text-muted); font-size: 0.88rem; transition: color var(--transition); display: flex; align-items: center; gap: 6px; }
        .footer-col ul a:hover { color: var(--primary-light); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 0.84rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-socials { display: flex; gap: 14px; }
        .footer-socials a {
            width: 36px; height: 36px;
            background: rgba(108, 43, 217, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: all var(--transition);
            border: 1px solid transparent;
        }
        .footer-socials a:hover { background: rgba(108, 43, 217, 0.25); color: var(--primary-light); border-color: rgba(108, 43, 217, 0.3); transform: translateY(-2px); }

        @media (max-width: 820px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== 通用工具 ===== */
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(24px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-fade { animation: fadeInUp 0.6s ease forwards; }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c3bf1;
            --primary-light: #8b5cf6;
            --primary-dark: #4a1fa8;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #06b6d4;
            --bg-dark: #0b0d17;
            --bg-card: #13162b;
            --bg-card-hover: #1a1f3a;
            --bg-section: #0f1225;
            --bg-section-alt: #13172e;
            --text-main: #f0f4ff;
            --text-muted: #94a3b8;
            --text-dim: #64748b;
            --border-color: rgba(108, 59, 241, 0.2);
            --border-glow: rgba(108, 59, 241, 0.4);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 40px rgba(108, 59, 241, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 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-sans);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 1rem;
            outline: none;
            border: none;
            background: transparent;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
        }
        h1 {
            font-size: clamp(2.2rem, 6vw, 3.8rem);
        }
        h2 {
            font-size: clamp(1.6rem, 4vw, 2.6rem);
        }
        h3 {
            font-size: clamp(1.15rem, 2.5vw, 1.6rem);
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-muted);
            margin-bottom: 0.75rem;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-dark);
            border-radius: 10px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(11, 13, 23, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .site-header:hover {
            border-bottom-color: var(--border-glow);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.3px;
        }
        .logo i {
            color: var(--secondary);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.4));
        }
        .logo span {
            background: linear-gradient(135deg, #f0f4ff, #c4b5fd);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover span {
            background: linear-gradient(135deg, var(--secondary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a i {
            font-size: 0.85rem;
            opacity: 0.7;
        }
        .nav-list a:hover {
            color: var(--text-main);
            background: rgba(108, 59, 241, 0.08);
        }
        .nav-list a.active {
            color: var(--secondary);
            background: rgba(245, 158, 11, 0.08);
            box-shadow: inset 0 -2px 0 var(--secondary);
        }
        .nav-list a.active i {
            opacity: 1;
            color: var(--secondary);
        }
        .nav-list a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-weight: 600;
            padding: 8px 22px;
            border-radius: var(--radius-md);
            box-shadow: 0 4px 20px rgba(108, 59, 241, 0.3);
            margin-left: 8px;
        }
        .nav-list a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108, 59, 241, 0.5);
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .nav-list a.nav-cta i {
            color: #fff;
            opacity: 1;
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-main);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: linear-gradient(160deg, var(--bg-dark) 0%, var(--bg-section) 60%, rgba(108, 59, 241, 0.08) 100%);
            position: relative;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
            animation: floatBg 30s ease-in-out infinite alternate;
        }
        @keyframes floatBg {
            0% {
                transform: scale(1) translate(0, 0);
            }
            100% {
                transform: scale(1.05) translate(-10px, -10px);
            }
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(11, 13, 23, 0.92) 0%, rgba(11, 13, 23, 0.7) 50%, rgba(108, 59, 241, 0.08) 100%);
            z-index: 1;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: clamp(2.2rem, 5.5vw, 3.6rem);
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #f0f4ff, var(--secondary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner p {
            font-size: 1.2rem;
            max-width: 680px;
            margin: 0 auto 24px;
            color: var(--text-muted);
            line-height: 1.8;
        }
        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-top: 12px;
        }
        .banner-tags span {
            background: rgba(108, 59, 241, 0.15);
            border: 1px solid var(--border-color);
            padding: 6px 20px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
            backdrop-filter: blur(4px);
        }
        .banner-tags span i {
            color: var(--secondary);
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            max-width: 620px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-header .subtitle {
            display: inline-block;
            background: rgba(108, 59, 241, 0.12);
            border: 1px solid var(--border-color);
            padding: 4px 18px;
            border-radius: 40px;
            font-size: 0.8rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card-grid-3 {
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        }
        .card-grid-4 {
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .card:hover .card-img {
            transform: scale(1.02);
        }
        .card-body {
            padding: 22px 24px 26px;
        }
        .card-body h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .card-body h3 a {
            color: var(--text-main);
        }
        .card-body h3 a:hover {
            color: var(--secondary);
        }
        .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-dim);
            margin-top: 6px;
        }
        .card-meta i {
            margin-right: 4px;
            font-size: 0.75rem;
            color: var(--primary-light);
        }
        .card-tag {
            display: inline-block;
            background: rgba(108, 59, 241, 0.12);
            border: 1px solid var(--border-color);
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 0.72rem;
            color: var(--primary-light);
            margin-right: 6px;
            margin-bottom: 6px;
        }
        .card-tag.hot {
            background: rgba(245, 158, 11, 0.15);
            border-color: rgba(245, 158, 11, 0.2);
            color: var(--secondary);
        }
        .card-tag.new {
            background: rgba(6, 182, 212, 0.15);
            border-color: rgba(6, 182, 212, 0.2);
            color: var(--accent);
        }

        /* ===== 排行列表 ===== */
        .rank-list {
            display: grid;
            gap: 16px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 16px 22px;
            transition: var(--transition);
            cursor: default;
        }
        .rank-item:hover {
            border-color: var(--border-glow);
            background: var(--bg-card-hover);
            transform: translateX(4px);
        }
        .rank-num {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-dim);
            min-width: 44px;
            text-align: center;
            font-feature-settings: "tnum";
        }
        .rank-num.top1 {
            color: var(--secondary);
        }
        .rank-num.top2 {
            color: var(--primary-light);
        }
        .rank-num.top3 {
            color: var(--accent);
        }
        .rank-info {
            flex: 1;
        }
        .rank-info h4 {
            font-size: 1.05rem;
            margin-bottom: 2px;
        }
        .rank-info p {
            font-size: 0.85rem;
            color: var(--text-dim);
            margin: 0;
        }
        .rank-score {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .rank-score i {
            color: var(--secondary);
        }
        .rank-score .num {
            font-weight: 700;
            color: var(--text-main);
        }

        /* ===== 统计/数据块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: var(--border-glow);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .stat-item .num {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--secondary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-item .label {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-top: 6px;
        }
        .stat-item i {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            display: block;
            opacity: 0.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: grid;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1.02rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
            transition: var(--transition);
            color: var(--text-main);
        }
        .faq-question i {
            color: var(--primary-light);
            transition: var(--transition);
            font-size: 0.85rem;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(145deg, var(--bg-section), rgba(108, 59, 241, 0.06));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
            padding: 80px 0;
        }
        .cta-section h2 {
            margin-bottom: 16px;
        }
        .cta-section p {
            max-width: 560px;
            margin: 0 auto 28px;
            font-size: 1.08rem;
        }
        .btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 24px rgba(108, 59, 241, 0.35);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 40px rgba(108, 59, 241, 0.5);
            color: #fff;
        }
        .btn-outline {
            background: transparent;
            border: 2px solid var(--border-color);
            color: var(--text-main);
        }
        .btn-outline:hover {
            border-color: var(--primary-light);
            background: rgba(108, 59, 241, 0.06);
            transform: translateY(-3px);
            color: var(--text-main);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 4px;
            margin: 16px auto 20px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-dim);
            max-width: 320px;
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 1rem;
            margin-bottom: 16px;
            color: var(--text-main);
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-dim);
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
            transform: translateX(4px);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            border-top: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-dim);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a {
            color: var(--text-dim);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }
        .footer-socials {
            display: flex;
            gap: 14px;
        }
        .footer-socials a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
            color: var(--text-dim);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .card-grid-4 {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(11, 13, 23, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-list a {
                padding: 14px 18px;
                font-size: 1rem;
                width: 100%;
                justify-content: flex-start;
                border-radius: var(--radius-sm);
            }
            .nav-list a.nav-cta {
                margin-left: 0;
                margin-top: 8px;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }
            .page-banner {
                padding: 120px 0 60px;
                min-height: 300px;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .section {
                padding: 56px 0;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .card-grid-3 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr 1fr;
            }
            .rank-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 14px 18px;
            }
            .rank-score {
                width: 100%;
                justify-content: flex-start;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .num {
                font-size: 2.2rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .banner-tags span {
                font-size: 0.78rem;
                padding: 4px 14px;
            }
            .cta-section {
                padding: 56px 0;
            }
            .btn-group .btn {
                padding: 12px 26px;
                font-size: 0.92rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .rank-num {
                min-width: 32px;
                font-size: 1.3rem;
            }
            .rank-info h4 {
                font-size: 0.95rem;
            }
        }

        /* ===== 动画辅助 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.show {
            opacity: 1;
            transform: translateY(0);
        }
        @media (prefers-reduced-motion: reduce) {
            .fade-up {
                opacity: 1;
                transform: none;
            }
            * {
                animation-duration: 0.01ms !important;
            }
        }

        /* ===== 额外板块特有的样式 ===== */
        .featured-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 28px;
        }
        .featured-grid .card:first-child {
            grid-row: span 2;
        }
        .featured-grid .card .card-img {
            aspect-ratio: 16/10;
        }

        @media (max-width: 768px) {
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .featured-grid .card:first-child {
                grid-row: span 1;
            }
        }

        .hot-label {
            display: inline-block;
            background: linear-gradient(135deg, #ef4444, #dc2626);
            color: #fff;
            font-size: 0.65rem;
            font-weight: 700;
            padding: 2px 12px;
            border-radius: 40px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-left: 6px;
            vertical-align: middle;
        }
        .badge {
            display: inline-block;
            background: rgba(108, 59, 241, 0.12);
            border: 1px solid var(--border-color);
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 0.72rem;
            color: var(--primary-light);
        }
        .badge.secondary {
            background: rgba(245, 158, 11, 0.12);
            border-color: rgba(245, 158, 11, 0.2);
            color: var(--secondary);
        }
        .badge.accent {
            background: rgba(6, 182, 212, 0.12);
            border-color: rgba(6, 182, 212, 0.2);
            color: var(--accent);
        }