/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #f0a500;
            --secondary-dark: #d48c00;
            --accent: #ff4d4d;
            --dark: #0a0a0f;
            --dark-2: #12121a;
            --dark-3: #1a1a2e;
            --dark-4: #222240;
            --text: #f0f0f0;
            --text-light: #ffffff;
            --text-muted: #8a8a9a;
            --text-dim: #5a5a6a;
            --border: #2a2a3a;
            --border-light: #3a3a4a;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 30px rgba(230,57,70,0.15);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --header-h: 72px;
            --max-w: 1200px;
            --gap: 24px;
        }

        /* ===== 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-base);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--dark);
            min-height: 100vh;
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-light); }
        h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
        h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
        h3 { font-size: clamp(1.1rem, 1.8vw, 1.5rem); }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; color: var(--text); }
        p:last-child { margin-bottom: 0; }
        .container {
            width: 100%;
            max-width: var(--max-w);
            margin: 0 auto;
            padding: 0 var(--gap);
        }

        /* ===== 通用组件 ===== */
        .section { padding: 80px 0; }
        .section-dark { background: var(--dark-2); }
        .section-darker { background: var(--dark); }
        .section-header { text-align: center; margin-bottom: 48px; }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { font-size: 1.05rem; color: var(--text-muted); max-width: 640px; margin: 0 auto; }
        .section-tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            background: rgba(230,57,70,0.12);
            color: var(--primary-light);
            border: 1px solid rgba(230,57,70,0.25);
            margin-bottom: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-light);
            border-color: var(--border-light);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            transform: translateY(-2px);
        }
        .btn-ghost {
            background: rgba(230,57,70,0.08);
            color: var(--primary-light);
            border-color: transparent;
        }
        .btn-ghost:hover {
            background: rgba(230,57,70,0.18);
            color: var(--primary-light);
        }
        .btn-lg { padding: 16px 44px; font-size: 1.05rem; border-radius: var(--radius-md); }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }

        .badge {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(230,57,70,0.15);
            color: var(--primary-light);
            border: 1px solid rgba(230,57,70,0.2);
        }
        .badge-gold {
            background: rgba(240,165,0,0.15);
            color: var(--secondary);
            border-color: rgba(240,165,0,0.2);
        }

        .card {
            background: var(--dark-3);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 28px 24px;
            transition: all var(--transition);
        }
        .card:hover {
            border-color: rgba(230,57,70,0.3);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }
        .card-img {
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            overflow: hidden;
            aspect-ratio: 16/9;
            background: var(--dark-4);
        }
        .card-img img { width: 100%; height: 100%; object-fit: cover; }
        .card-body { padding: 20px 0 0; }

        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--gap); }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: var(--gap); }

        .divider { height: 1px; background: var(--border); margin: 0; border: none; }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10,10,15,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(42,42,58,0.5);
            height: var(--header-h);
            transition: background var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 8px;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 900;
        }
        .logo span { color: var(--primary); }

        .nav { display: flex; align-items: center; gap: 6px; }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover { color: var(--text-light); background: rgba(255,255,255,0.05); }
        .nav a.active {
            color: var(--text-light);
            background: rgba(230,57,70,0.12);
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
        }
        .nav-cta {
            padding: 8px 22px !important;
            background: var(--primary) !important;
            color: #fff !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            margin-left: 12px;
        }
        .nav-cta:hover { background: var(--primary-dark) !important; color: #fff !important; transform: translateY(-1px); }

        .menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; background: none; border: none; }
        .menu-toggle span { display: block; width: 24px; height: 2px; background: var(--text-light); border-radius: 1px; transition: all var(--transition); }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            padding-top: var(--header-h);
            background: var(--dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.4;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,10,15,0.92) 0%, rgba(10,10,15,0.6) 50%, rgba(10,10,15,0.88) 100%);
            z-index: 1;
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-content { max-width: 720px; }
        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            border-radius: 20px;
            background: rgba(230,57,70,0.12);
            border: 1px solid rgba(230,57,70,0.2);
            color: var(--primary-light);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 24px;
        }
        .hero-tag i { font-size: 0.75rem; }
        .hero h1 { margin-bottom: 20px; }
        .hero h1 span { color: var(--primary); }
        .hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 560px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }
        .hero-stat h3 { font-size: 1.8rem; color: var(--primary); }
        .hero-stat p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }

        /* ===== 平台简介 ===== */
        .intro-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 24px; }
        .intro-card {
            background: var(--dark-3);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            border: 1px solid var(--border);
            transition: all var(--transition);
            text-align: center;
        }
        .intro-card:hover {
            border-color: rgba(230,57,70,0.25);
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow);
        }
        .intro-icon {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: rgba(230,57,70,0.1);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary);
            transition: background var(--transition);
        }
        .intro-card:hover .intro-icon { background: rgba(230,57,70,0.2); }
        .intro-card h3 { margin-bottom: 12px; }
        .intro-card p { font-size: 0.92rem; color: var(--text-muted); }

        /* ===== 分类入口 ===== */
        .category-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--dark-3);
            border: 1px solid var(--border);
            transition: all var(--transition);
            min-height: 240px;
            display: flex;
            align-items: flex-end;
        }
        .category-card:hover {
            border-color: rgba(230,57,70,0.3);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .category-card-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
        }
        .category-card-bg img { width: 100%; height: 100%; object-fit: cover; }
        .category-card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(10,10,15,0.9) 0%, rgba(10,10,15,0.3) 70%, transparent 100%);
            z-index: 1;
        }
        .category-card-content {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            width: 100%;
        }
        .category-card-content h3 { font-size: 1.3rem; margin-bottom: 8px; }
        .category-card-content p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 16px; max-width: 70%; }
        .category-card-content .btn { font-size: 0.85rem; padding: 8px 22px; }

        /* ===== 最新资讯 ===== */
        .news-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
        .news-card {
            background: var(--dark-3);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: rgba(230,57,70,0.25);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .news-card-img {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: var(--dark-4);
        }
        .news-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
        .news-card:hover .news-card-img img { transform: scale(1.05); }
        .news-card-body { padding: 20px 20px 24px; flex: 1; display: flex; flex-direction: column; }
        .news-card-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; font-size: 0.8rem; color: var(--text-dim); }
        .news-card-meta .badge { font-size: 0.7rem; }
        .news-card-body h3 { font-size: 1.05rem; margin-bottom: 10px; flex: 1; }
        .news-card-body h3 a { color: var(--text-light); }
        .news-card-body h3 a:hover { color: var(--primary-light); }
        .news-card-body p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 12px; }
        .news-card-footer { display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; color: var(--text-dim); }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            background: var(--dark-3);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border);
        }
        .news-empty i { font-size: 2.4rem; margin-bottom: 16px; color: var(--text-dim); display: block; }

        /* ===== 平台特色 ===== */
        .features-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .feature-item {
            display: flex;
            gap: 20px;
            padding: 28px 24px;
            background: var(--dark-3);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .feature-item:hover {
            border-color: rgba(240,165,0,0.2);
            transform: translateY(-2px);
        }
        .feature-icon {
            flex-shrink: 0;
            width: 56px;
            height: 56px;
            background: rgba(240,165,0,0.1);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--secondary);
        }
        .feature-text h4 { font-size: 1.05rem; margin-bottom: 6px; }
        .feature-text p { font-size: 0.88rem; color: var(--text-muted); margin: 0; }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 20px; }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: var(--dark-3);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stat-card:hover { border-color: rgba(230,57,70,0.2); }
        .stat-number { font-size: 2.6rem; font-weight: 800; color: var(--primary); line-height: 1.2; margin-bottom: 8px; }
        .stat-label { font-size: 0.9rem; color: var(--text-muted); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--dark-3);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover { border-color: rgba(230,57,70,0.2); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-light);
            background: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--dark-2);
            position: relative;
            overflow: hidden;
        }
        .cta-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-content { position: relative; z-index: 1; text-align: center; padding: 60px 0; }
        .cta-content h2 { margin-bottom: 16px; }
        .cta-content p { color: var(--text-muted); max-width: 520px; margin: 0 auto 28px; font-size: 1.05rem; }

        /* ===== Footer ===== */
        .footer {
            background: var(--dark-2);
            border-top: 1px solid var(--border);
            padding: 60px 0 32px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo { margin-bottom: 16px; }
        .footer-brand p { font-size: 0.88rem; color: var(--text-muted); max-width: 320px; }
        .footer-col h4 { font-size: 0.95rem; margin-bottom: 16px; color: var(--text-light); }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.88rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); }
        .footer-bottom {
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p { font-size: 0.82rem; color: var(--text-dim); margin: 0; }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--dark-3);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: all var(--transition);
        }
        .footer-socials a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .header .container { padding: 0 16px; }
            .nav { display: none; }
            .nav.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(10,10,15,0.98);
                backdrop-filter: blur(20px);
                padding: 20px 16px;
                border-bottom: 1px solid var(--border);
                gap: 4px;
            }
            .nav.open a { padding: 12px 16px; width: 100%; }
            .nav.open .nav-cta { margin-left: 0; margin-top: 8px; text-align: center; }
            .menu-toggle { display: flex; }

            .hero { min-height: 80vh; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat h3 { font-size: 1.4rem; }

            .grid-2, .grid-3, .intro-grid { grid-template-columns: 1fr; }
            .category-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .features-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-header p { font-size: 0.95rem; }
            .hero p { font-size: 1rem; }
            .category-card-content p { max-width: 100%; }
        }

        @media (max-width: 520px) {
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr; }
            .hero-stats { flex-direction: column; gap: 16px; }
            .logo { font-size: 1.1rem; }
            .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #e53935;
            --primary-dark: #c62828;
            --primary-light: #ff6f60;
            --accent: #ff8f00;
            --accent-dark: #e65100;
            --bg-dark: #0d0d0d;
            --bg-darker: #080808;
            --bg-card: #141414;
            --bg-card-hover: #1c1c1c;
            --bg-section: #111111;
            --text-primary: #f5f5f5;
            --text-secondary: #b0b0b0;
            --text-muted: #757575;
            --border-color: #2a2a2a;
            --border-light: #3a3a3a;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.5);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.7);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, 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: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h2 { font-size: 2.2rem; margin-bottom: 0.5rem; }
        h3 { font-size: 1.4rem; margin-bottom: 0.4rem; }

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

        /* ===== 导航 Header ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(13,13,13,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: var(--transition);
        }
        .header.scrolled { background: rgba(8,8,8,0.98); box-shadow: var(--shadow-md); }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 1px;
        }
        .logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            font-weight: 900;
        }
        .logo span { color: var(--primary-light); }
        .logo:hover { color: var(--text-primary); }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav a:hover { color: var(--text-primary); background: rgba(255,255,255,0.05); }
        .nav a:hover::after { transform: translateX(-50%) scaleX(1); }
        .nav a.active { color: var(--text-primary); background: rgba(229,57,53,0.15); }
        .nav a.active::after { transform: translateX(-50%) scaleX(1); background: var(--primary); }
        .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            padding: 8px 24px !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 600 !important;
            margin-left: 12px;
            box-shadow: 0 4px 15px rgba(229,57,53,0.35);
        }
        .nav-cta::after { display: none !important; }
        .nav-cta:hover { background: var(--primary-dark) !important; transform: translateY(-1px); box-shadow: 0 6px 25px rgba(229,57,53,0.5); }
        .nav-cta i { margin-right: 6px; font-size: 0.85rem; }

        /* 移动端汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
        }
        .hamburger span {
            width: 28px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

        /* ===== Banner / Hero 内页 ===== */
        .page-banner {
            padding-top: calc(var(--header-height) + 40px);
            padding-bottom: 60px;
            background: var(--bg-darker);
            position: relative;
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .page-banner .banner-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(8,8,8,0.88) 0%, rgba(13,13,13,0.6) 70%, rgba(229,57,53,0.15) 100%);
            z-index: 1;
        }
        .page-banner .container { position: relative; z-index: 2; }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 900;
            letter-spacing: 2px;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 40%, var(--primary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .page-banner .breadcrumb a { color: var(--text-secondary); }
        .page-banner .breadcrumb a:hover { color: var(--primary-light); }
        .page-banner .breadcrumb i { font-size: 0.7rem; }
        .page-banner .banner-desc {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 720px;
            line-height: 1.8;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
            position: relative;
        }
        .section-dark { background: var(--bg-section); }
        .section-darker { background: var(--bg-darker); }
        .section-title {
            text-align: center;
            margin-bottom: 56px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 1px;
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-title p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 620px;
            margin: 12px auto 0;
        }

        /* ===== 步骤 / 流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover { background: var(--bg-card-hover); border-color: var(--border-light); transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 1.5rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 4px 20px rgba(229,57,53,0.3);
        }
        .step-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
        .step-card p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.6; }

        /* ===== 功能卡片 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .feature-card:hover { background: var(--bg-card-hover); border-color: var(--border-light); transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .feature-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }
        .feature-card .card-body {
            padding: 24px 20px 26px;
        }
        .feature-card .card-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .feature-card .card-body p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; }
        .feature-card .card-tag {
            display: inline-block;
            padding: 3px 14px;
            border-radius: 20px;
            background: rgba(229,57,53,0.15);
            color: var(--primary-light);
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 12px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-light); }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            background: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: var(--transition);
        }
        .faq-question:hover { background: rgba(255,255,255,0.02); }
        .faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.85rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 24px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-box {
            background: linear-gradient(135deg, rgba(229,57,53,0.08), rgba(198,40,40,0.02));
            border: 1px solid rgba(229,57,53,0.2);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
        }
        .cta-box h2 { font-size: 2rem; margin-bottom: 12px; }
        .cta-box p { color: var(--text-secondary); font-size: 1.05rem; max-width: 600px; margin: 0 auto 28px; }
        .cta-box .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            background: transparent;
            color: var(--text-primary);
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 20px rgba(229,57,53,0.35);
        }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(229,57,53,0.5); color: #fff; }
        .btn-outline {
            border: 2px solid var(--border-light);
            color: var(--text-primary);
        }
        .btn-outline:hover { border-color: var(--primary); color: var(--primary-light); background: rgba(229,57,53,0.05); }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            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: 1.3rem; margin-bottom: 14px; }
        .footer-brand p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.7; max-width: 340px; }
        .footer-col h4 { font-size: 1rem; font-weight: 700; margin-bottom: 18px; color: var(--text-primary); }
        .footer-col a {
            display: block;
            color: var(--text-secondary);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-socials { display: flex; gap: 14px; }
        .footer-socials a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-card);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 1rem;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .footer-socials a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

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

        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(13,13,13,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
                box-shadow: var(--shadow-lg);
            }
            .nav.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav a { width: 100%; padding: 12px 16px; font-size: 1.05rem; }
            .nav-cta { margin-left: 0; margin-top: 8px; text-align: center; justify-content: center; }
            .page-banner h1 { font-size: 2.2rem; }
            .page-banner { min-height: 300px; padding-top: calc(var(--header-height) + 30px); padding-bottom: 40px; }
            .section { padding: 56px 0; }
            .section-title h2 { font-size: 1.8rem; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
            .features-grid { grid-template-columns: 1fr; }
            .cta-box { padding: 40px 24px; }
            .cta-box h2 { font-size: 1.6rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .footer-brand p { max-width: 100%; }
        }

        @media (max-width: 520px) {
            .steps-grid { grid-template-columns: 1fr; }
            .page-banner h1 { font-size: 1.8rem; }
            .page-banner .banner-desc { font-size: 1rem; }
            .section-title h2 { font-size: 1.5rem; }
            .feature-card .card-img { height: 160px; }
            .container { padding: 0 16px; }
            .btn { padding: 12px 24px; font-size: 0.9rem; }
        }

/* roulang page: article */
/* ============================================
           设计变量
        ============================================ */
        :root {
            --primary: #D32F2F;
            --primary-dark: #B71C1C;
            --primary-light: #EF5350;
            --accent: #FF6F00;
            --accent-light: #FFB300;
            --dark: #0F0F1A;
            --dark-2: #1A1A2E;
            --dark-3: #2C2C3E;
            --light: #F5F5F5;
            --gray-100: #F0F0F5;
            --gray-200: #E8E8EE;
            --gray-300: #D0D0D8;
            --white: #FFFFFF;
            --text: #222222;
            --text-light: #555555;
            --text-muted: #888888;
            --border: #E0E0E8;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow: 0 4px 24px rgba(0,0,0,0.07);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.10);
            --radius: 12px;
            --radius-sm: 6px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ============================================
           基础 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: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--white);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--dark-2); }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ============================================
           导航
        ============================================ */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 15, 26, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .header.scrolled {
            background: rgba(15, 15, 26, 0.98);
            box-shadow: 0 4px 30px rgba(0,0,0,0.3);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 24px;
            font-weight: 800;
            color: var(--white);
            letter-spacing: -0.5px;
            transition: var(--transition);
        }
        .logo:hover { color: var(--primary-light); }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            font-size: 20px;
            font-weight: 800;
            flex-shrink: 0;
        }
        .logo span { color: var(--accent-light); }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            position: relative;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(255,255,255,0.75);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            letter-spacing: 0.3px;
        }
        .nav a:hover {
            color: var(--white);
            background: rgba(255,255,255,0.08);
        }
        .nav a.active {
            color: var(--white);
            background: var(--primary);
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent-light);
            border-radius: 2px;
        }
        .nav a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: 12px;
        }
        .nav a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 20px rgba(211,47,47,0.35);
        }
        .nav a.nav-cta i { font-size: 14px; }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--white);
            font-size: 28px;
            cursor: pointer;
            padding: 4px;
            line-height: 1;
        }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(15,15,26,0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                border-bottom: 1px solid rgba(255,255,255,0.06);
                box-shadow: 0 20px 40px rgba(0,0,0,0.4);
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .nav a.nav-cta {
                margin-left: 0;
                margin-top: 8px;
                justify-content: center;
            }
            .nav a.active::after { display: none; }
        }

        /* ============================================
           文章 Banner
        ============================================ */
        .article-banner {
            position: relative;
            padding: 140px 0 80px;
            background: var(--dark-2);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-attachment: fixed;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,15,26,0.85) 0%, rgba(26,26,46,0.70) 50%, rgba(15,15,26,0.85) 100%);
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-banner .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .article-banner .category-badge i { font-size: 12px; }
        .article-banner h1 {
            font-size: 40px;
            font-weight: 800;
            color: var(--white);
            max-width: 860px;
            line-height: 1.25;
            letter-spacing: -0.5px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
            margin-bottom: 20px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: rgba(255,255,255,0.7);
            font-size: 14px;
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i { font-size: 13px; color: var(--accent-light); }
        .article-meta .divider {
            width: 4px;
            height: 4px;
            background: rgba(255,255,255,0.3);
            border-radius: 50%;
        }
        @media (max-width: 768px) {
            .article-banner { padding: 110px 0 50px; min-height: auto; }
            .article-banner h1 { font-size: 26px; }
            .article-meta { gap: 12px; font-size: 13px; }
        }
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 22px; }
            .article-meta .divider { display: none; }
        }

        /* ============================================
           文章正文
        ============================================ */
        .article-content-wrap {
            padding: 60px 0 40px;
            background: var(--white);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
        }
        .article-body {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .featured-image {
            width: 100%;
            border-radius: var(--radius);
            margin-bottom: 32px;
            box-shadow: var(--shadow);
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: var(--gray-100);
        }
        .article-body h2 {
            font-size: 28px;
            margin: 40px 0 16px;
            color: var(--dark-2);
            padding-bottom: 12px;
            border-bottom: 3px solid var(--primary);
            display: inline-block;
        }
        .article-body h3 {
            font-size: 22px;
            margin: 32px 0 12px;
            color: var(--dark-2);
        }
        .article-body p {
            margin-bottom: 20px;
        }
        .article-body ul, .article-body ol {
            margin: 16px 0 24px;
            padding-left: 28px;
            list-style: disc;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            margin: 24px 0;
            padding: 20px 28px;
            background: var(--gray-100);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover { color: var(--primary-dark); }
        .article-body img {
            border-radius: var(--radius);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-body .content-empty {
            text-align: center;
            padding: 80px 20px;
            color: var(--text-muted);
        }
        .article-body .content-empty i {
            font-size: 48px;
            color: var(--gray-300);
            margin-bottom: 16px;
        }
        .article-body .content-empty p {
            font-size: 18px;
        }
        .article-body .content-empty a {
            display: inline-block;
            margin-top: 20px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            text-decoration: none;
            font-weight: 600;
        }
        .article-body .content-empty a:hover {
            background: var(--primary-dark);
        }

        /* 侧边栏 */
        .article-sidebar {
            position: sticky;
            top: calc(var(--nav-height) + 24px);
            align-self: start;
        }
        .sidebar-card {
            background: var(--gray-100);
            border-radius: var(--radius);
            padding: 28px 24px;
            margin-bottom: 24px;
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--dark-2);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-card p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 14px;
            background: var(--white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            color: var(--text);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }
        .sidebar-list a:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
            transform: translateX(4px);
        }
        .sidebar-list a i {
            color: var(--primary);
            font-size: 12px;
        }
        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .sidebar-tags a {
            padding: 6px 16px;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: 30px;
            font-size: 13px;
            color: var(--text-light);
            transition: var(--transition);
        }
        .sidebar-tags a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; gap: 32px; }
            .article-sidebar { position: static; }
        }
        @media (max-width: 768px) {
            .article-content-wrap { padding: 40px 0 24px; }
            .article-body { font-size: 16px; }
            .article-body h2 { font-size: 24px; }
            .article-body h3 { font-size: 20px; }
        }

        /* ============================================
           标签 & 分享
        ============================================ */
        .article-foot {
            margin-top: 48px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags span {
            padding: 6px 16px;
            background: var(--gray-100);
            border-radius: 30px;
            font-size: 13px;
            color: var(--text-light);
            border: 1px solid var(--border);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .article-share span {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--gray-100);
            color: var(--text-light);
            font-size: 16px;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .article-share a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        @media (max-width: 520px) {
            .article-foot { flex-direction: column; align-items: flex-start; }
        }

        /* ============================================
           相关文章
        ============================================ */
        .related-section {
            padding: 60px 0;
            background: var(--gray-100);
        }
        .related-section .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .related-section .section-header h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--dark-2);
            margin-bottom: 8px;
        }
        .related-section .section-header p {
            color: var(--text-muted);
            font-size: 16px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--white);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .related-card .card-img {
            aspect-ratio: 16 / 9;
            background: var(--gray-200);
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .related-card .card-img .card-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 30px;
            font-size: 12px;
            font-weight: 600;
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark-2);
            line-height: 1.4;
        }
        .related-card .card-body h3 a {
            color: var(--dark-2);
        }
        .related-card .card-body h3 a:hover { color: var(--primary); }
        .related-card .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }
        .related-card .card-body .meta {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-body .meta i { font-size: 12px; }
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 640px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-section .section-header h2 { font-size: 24px; }
        }

        /* ============================================
           CTA 区块
        ============================================ */
        .article-cta {
            padding: 60px 0;
            background: var(--dark-2);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .article-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,15,26,0.88) 0%, rgba(26,26,46,0.75) 100%);
            z-index: 1;
        }
        .article-cta .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .article-cta h2 {
            font-size: 32px;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 12px;
        }
        .article-cta p {
            color: rgba(255,255,255,0.7);
            font-size: 17px;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .article-cta .cta-btns {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .article-cta .btn {
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: none;
            cursor: pointer;
        }
        .article-cta .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .article-cta .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(211,47,47,0.35);
        }
        .article-cta .btn-outline {
            background: transparent;
            color: var(--white);
            border: 2px solid rgba(255,255,255,0.3);
        }
        .article-cta .btn-outline:hover {
            border-color: var(--accent-light);
            color: var(--accent-light);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .article-cta h2 { font-size: 26px; }
            .article-cta .btn { width: 100%; justify-content: center; }
        }

        /* ============================================
           页脚
        ============================================ */
        .footer {
            background: var(--dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255,255,255,0.04);
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo {
            font-size: 22px;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 14px;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding-top: 28px;
            font-size: 13px;
            color: rgba(255,255,255,0.4);
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: rgba(255,255,255,0.5);
            font-size: 15px;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 640px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ============================================
           实用工具类
        ============================================ */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 8px; }
        .mt-4 { margin-top: 16px; }
        .mt-6 { margin-top: 24px; }
        .mb-4 { margin-bottom: 16px; }
        .mb-6 { margin-bottom: 24px; }

        /* ============================================
           文章空状态
        ============================================ */
        .not-found-wrap {
            padding: 100px 0;
            text-align: center;
            flex: 1;
        }
        .not-found-wrap .nf-icon {
            font-size: 64px;
            color: var(--gray-300);
            margin-bottom: 16px;
        }
        .not-found-wrap h2 {
            font-size: 28px;
            color: var(--dark-2);
            margin-bottom: 8px;
        }
        .not-found-wrap p {
            color: var(--text-muted);
            font-size: 16px;
            margin-bottom: 24px;
        }
        .not-found-wrap a.btn-back {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-wrap a.btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(211,47,47,0.3);
        }

        /* ============================================
           加载过渡
        ============================================ */
        @keyframes fadeUp {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-in {
            animation: fadeUp 0.5s ease forwards;
        }
        .animate-in-delay-1 { animation-delay: 0.1s; }
        .animate-in-delay-2 { animation-delay: 0.2s; }
        .animate-in-delay-3 { animation-delay: 0.3s; }