/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #d4a853;
            --clr-primary-dark: #b88d3a;
            --clr-primary-light: #e8c86a;
            --clr-accent: #e74c3c;
            --clr-accent-dark: #c0392b;
            --clr-bg: #0b0f1a;
            --clr-bg-alt: #111827;
            --clr-surface: #151e2e;
            --clr-surface-light: #1e2a3e;
            --clr-text: #f0f0f0;
            --clr-text-secondary: #a0b0c0;
            --clr-text-muted: #6b7d8f;
            --clr-border: #2a3548;
            --clr-border-light: #3a4a60;
            --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 6px 24px rgba(0,0,0,0.4);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 30px rgba(212,168,83,0.15);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-family);
            background: var(--clr-bg);
            color: var(--clr-text);
            line-height: 1.65;
            font-size: 16px;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--clr-primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--clr-primary-light); }
        a:focus-visible { outline: 2px solid var(--clr-primary); outline-offset: 2px; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--clr-text); }

        /* ===== 容器 ===== */
        .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;
            width: 100%;
            height: var(--header-height);
            background: rgba(11,15,26,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--clr-border);
            z-index: 1000;
            transition: background var(--transition), border-color var(--transition);
        }
        .header.scrolled {
            background: rgba(11,15,26,0.98);
            border-bottom-color: var(--clr-border-light);
            box-shadow: var(--shadow-md);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            position: relative;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .header-logo .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 800;
            color: #0b0f1a;
            flex-shrink: 0;
        }
        .header-logo .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--clr-text);
            letter-spacing: 0.5px;
        }
        .header-logo .logo-text span {
            color: var(--clr-primary);
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-nav a {
            position: relative;
            padding: 8px 20px;
            font-size: 15px;
            font-weight: 500;
            color: var(--clr-text-secondary);
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
        }
        .header-nav a:hover {
            color: var(--clr-text);
            background: rgba(212,168,83,0.08);
        }
        .header-nav a.active {
            color: var(--clr-primary);
            background: rgba(212,168,83,0.12);
        }
        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--clr-primary);
            border-radius: 2px;
        }
        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-cta .btn-cta {
            padding: 10px 28px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
            color: #0b0f1a;
            font-weight: 700;
            font-size: 14px;
            border-radius: var(--radius-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 16px rgba(212,168,83,0.25);
        }
        .header-cta .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(212,168,83,0.35);
            color: #0b0f1a;
        }
        .header-cta .btn-cta:active {
            transform: translateY(0);
        }
        .header-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            color: var(--clr-text);
            font-size: 22px;
            border-radius: var(--radius-sm);
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
        }
        @media (max-width: 768px) {
            .header-nav {
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: var(--clr-bg-alt);
                border-bottom: 1px solid var(--clr-border);
                flex-direction: column;
                padding: 16px;
                gap: 4px;
                display: none;
                box-shadow: var(--shadow-lg);
            }
            .header-nav.open { display: flex; }
            .header-nav a { width: 100%; padding: 12px 16px; }
            .header-nav a.active::after { display: none; }
            .header-cta .btn-cta { padding: 8px 18px; font-size: 13px; }
            .header-toggle { display: flex; }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 88vh;
            display: flex;
            align-items: center;
            margin-top: var(--header-height);
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11,15,26,0.88) 30%, rgba(11,15,26,0.60) 70%, rgba(11,15,26,0.30) 100%);
            z-index: 1;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 120px;
            background: linear-gradient(to top, var(--clr-bg), transparent);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 780px;
            padding: 60px 0 80px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 18px;
            background: rgba(212,168,83,0.15);
            border: 1px solid rgba(212,168,83,0.3);
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
            color: var(--clr-primary);
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }
        .hero-badge i { font-size: 12px; }
        .hero-title {
            font-size: clamp(36px, 6vw, 64px);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 18px;
            color: var(--clr-text-secondary);
            max-width: 600px;
            margin-bottom: 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-actions .btn-primary {
            padding: 16px 40px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
            color: #0b0f1a;
            font-weight: 700;
            font-size: 16px;
            border-radius: var(--radius-sm);
            box-shadow: 0 6px 24px rgba(212,168,83,0.3);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .hero-actions .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 36px rgba(212,168,83,0.4);
            color: #0b0f1a;
        }
        .hero-actions .btn-secondary {
            padding: 16px 32px;
            background: transparent;
            color: var(--clr-text);
            font-weight: 600;
            font-size: 16px;
            border-radius: var(--radius-sm);
            border: 1.5px solid var(--clr-border-light);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .hero-actions .btn-secondary:hover {
            background: rgba(255,255,255,0.05);
            border-color: var(--clr-primary);
            color: var(--clr-primary);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 52px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-item .num {
            font-size: 32px;
            font-weight: 800;
            color: var(--clr-primary);
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 14px;
            color: var(--clr-text-muted);
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero { min-height: 70vh; }
            .hero-content { padding: 40px 0 60px; }
            .hero-desc { font-size: 16px; }
            .hero-actions .btn-primary, .hero-actions .btn-secondary { padding: 14px 28px; font-size: 15px; width: 100%; text-align: center; }
            .hero-stats { gap: 24px; }
            .hero-stat-item .num { font-size: 26px; }
        }
        @media (max-width: 520px) {
            .hero { min-height: 60vh; }
            .hero-stats { flex-direction: column; gap: 16px; }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--clr-bg-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header .label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--clr-primary);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: clamp(28px, 3.6vw, 40px);
            font-weight: 800;
            margin-bottom: 14px;
        }
        .section-header p {
            color: var(--clr-text-secondary);
            font-size: 17px;
            max-width: 640px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-header { margin-bottom: 36px; }
        }

        /* ===== 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: rgba(212,168,83,0.3);
            box-shadow: var(--shadow-glow);
        }
        .feature-card .icon {
            width: 56px;
            height: 56px;
            background: rgba(212,168,83,0.12);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--clr-primary);
            margin-bottom: 20px;
        }
        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .feature-card p {
            color: var(--clr-text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }
        @media (max-width: 900px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 560px) {
            .features-grid { grid-template-columns: 1fr; }
        }

        /* ===== 关于/图文区块 ===== */
        .about-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .about-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .about-image img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            display: block;
        }
        .about-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-md);
            border: 1px solid rgba(212,168,83,0.1);
            pointer-events: none;
        }
        .about-text h2 {
            font-size: clamp(26px, 3vw, 36px);
            font-weight: 800;
            margin-bottom: 18px;
        }
        .about-text h2 span {
            color: var(--clr-primary);
        }
        .about-text p {
            color: var(--clr-text-secondary);
            font-size: 16px;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .about-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
        }
        .about-tags .tag {
            padding: 6px 18px;
            background: rgba(212,168,83,0.1);
            border: 1px solid rgba(212,168,83,0.2);
            border-radius: 50px;
            font-size: 13px;
            color: var(--clr-primary);
            font-weight: 500;
        }
        @media (max-width: 880px) {
            .about-wrap { grid-template-columns: 1fr; gap: 36px; }
            .about-image img { height: 260px; }
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }
        .category-card .card-bg {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        .category-card .card-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11,15,26,0.9) 30%, rgba(11,15,26,0.3) 100%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 28px;
        }
        .category-card .card-overlay .cat-label {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--clr-primary);
            background: rgba(212,168,83,0.15);
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 10px;
            width: fit-content;
            border: 1px solid rgba(212,168,83,0.2);
        }
        .category-card .card-overlay h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .category-card .card-overlay p {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
        }
        .category-card .card-overlay .arrow {
            position: absolute;
            top: 24px;
            right: 24px;
            width: 44px;
            height: 44px;
            background: rgba(212,168,83,0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-primary);
            font-size: 18px;
            backdrop-filter: blur(4px);
            border: 1px solid rgba(212,168,83,0.15);
            transition: background var(--transition), transform var(--transition);
        }
        .category-card:hover .card-overlay .arrow {
            background: var(--clr-primary);
            color: #0b0f1a;
            transform: translateX(4px);
        }
        @media (max-width: 640px) {
            .category-grid { grid-template-columns: 1fr; }
            .category-card .card-bg { height: 160px; }
        }

        /* ===== 最新资讯 (CMS列表) ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
        }
        .news-card:hover {
            transform: translateY(-6px);
            border-color: rgba(212,168,83,0.25);
            box-shadow: var(--shadow-glow);
        }
        .news-card .card-img {
            width: 100%;
            height: 190px;
            object-fit: cover;
        }
        .news-card .card-body {
            padding: 22px 24px 26px;
        }
        .news-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            font-size: 13px;
            color: var(--clr-text-muted);
        }
        .news-card .card-body .meta .cat {
            padding: 2px 12px;
            background: rgba(212,168,83,0.1);
            border-radius: 50px;
            color: var(--clr-primary);
            font-weight: 500;
            font-size: 12px;
        }
        .news-card .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .card-body h3 a {
            color: var(--clr-text);
            transition: color var(--transition);
        }
        .news-card .card-body h3 a:hover {
            color: var(--clr-primary);
        }
        .news-card .card-body p {
            color: var(--clr-text-secondary);
            font-size: 14px;
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--clr-text-muted);
            font-size: 16px;
            background: var(--clr-surface);
            border: 1px dashed var(--clr-border);
            border-radius: var(--radius-md);
        }
        @media (max-width: 900px) {
            .news-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 560px) {
            .news-grid { grid-template-columns: 1fr; }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-card {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            transition: transform var(--transition), border-color var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            border-color: rgba(212,168,83,0.25);
        }
        .stat-card .num {
            font-size: 40px;
            font-weight: 800;
            color: var(--clr-primary);
            line-height: 1.2;
        }
        .stat-card .num sup {
            font-size: 20px;
            font-weight: 600;
            top: -0.5em;
        }
        .stat-card .label {
            font-size: 15px;
            color: var(--clr-text-secondary);
            margin-top: 8px;
        }
        @media (max-width: 820px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 440px) {
            .stats-grid { grid-template-columns: 1fr; }
        }

        /* ===== 特色服务 ===== */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .service-card {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
            position: relative;
            overflow: hidden;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 0;
            background: var(--clr-primary);
            transition: height 0.4s ease;
            border-radius: 0 0 2px 2px;
        }
        .service-card:hover::before {
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-4px);
            border-color: rgba(212,168,83,0.2);
            box-shadow: var(--shadow-glow);
        }
        .service-card .icon {
            width: 48px;
            height: 48px;
            background: rgba(212,168,83,0.1);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--clr-primary);
            margin-bottom: 18px;
        }
        .service-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .service-card p {
            color: var(--clr-text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }
        @media (max-width: 900px) {
            .services-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 560px) {
            .services-grid { grid-template-columns: 1fr; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item.active {
            border-color: rgba(212,168,83,0.3);
        }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--clr-text);
            background: transparent;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(255,255,255,0.02);
        }
        .faq-question .icon {
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--clr-primary);
            transition: transform var(--transition);
        }
        .faq-item.active .faq-question .icon {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            color: var(--clr-text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(212,168,83,0.08), rgba(212,168,83,0.02));
            border-top: 1px solid rgba(212,168,83,0.1);
            border-bottom: 1px solid rgba(212,168,83,0.1);
        }
        .cta-box {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: clamp(26px, 3.2vw, 38px);
            font-weight: 800;
            margin-bottom: 16px;
        }
        .cta-box p {
            color: var(--clr-text-secondary);
            font-size: 17px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .cta-box .btn-cta-large {
            display: inline-block;
            padding: 18px 52px;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
            color: #0b0f1a;
            font-weight: 700;
            font-size: 17px;
            border-radius: var(--radius-sm);
            box-shadow: 0 8px 32px rgba(212,168,83,0.3);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .cta-box .btn-cta-large:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 44px rgba(212,168,83,0.4);
            color: #0b0f1a;
        }
        .cta-box .btn-cta-large:active {
            transform: translateY(0);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--clr-bg-alt);
            border-top: 1px solid var(--clr-border);
            padding: 60px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--clr-text);
            margin-bottom: 12px;
            display: block;
        }
        .footer-brand .logo-text span {
            color: var(--clr-primary);
        }
        .footer-brand p {
            color: var(--clr-text-muted);
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--clr-text);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--clr-text-muted);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--clr-primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--clr-border);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 13px;
            color: var(--clr-text-muted);
        }
        .footer-bottom .social {
            display: flex;
            gap: 12px;
        }
        .footer-bottom .social a {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--clr-surface);
            border: 1px solid var(--clr-border);
            border-radius: 50%;
            color: var(--clr-text-muted);
            font-size: 15px;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }
        .footer-bottom .social a:hover {
            background: var(--clr-primary);
            color: #0b0f1a;
            border-color: var(--clr-primary);
        }
        @media (max-width: 820px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .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; }
        }

        /* ===== 额外 ===== */
        .back-to-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            background: var(--clr-primary);
            color: #0b0f1a;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            box-shadow: var(--shadow-md);
            z-index: 999;
            opacity: 0;
            transform: translateY(20px);
            transition: opacity var(--transition), transform var(--transition), background var(--transition);
            pointer-events: none;
        }
        .back-to-top.visible {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .back-to-top:hover {
            background: var(--clr-primary-light);
            color: #0b0f1a;
        }
        @media (max-width: 520px) {
            .back-to-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 17px; }
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 480px) {
            .header-logo .logo-text { font-size: 18px; }
            .header-logo .logo-icon { width: 34px; height: 34px; font-size: 16px; }
            .hero-title { font-size: 28px; }
            .hero-desc { font-size: 15px; }
            .section-header h2 { font-size: 24px; }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
    :root {
        --primary: #c0392b;
        --primary-dark: #a93226;
        --primary-light: #e74c3c;
        --secondary: #2c3e50;
        --secondary-light: #34495e;
        --accent: #f39c12;
        --accent-dark: #e67e22;
        --bg-dark: #0f0f0f;
        --bg-dark-alt: #1a1a1a;
        --bg-card: #1e1e1e;
        --bg-card-hover: #252525;
        --bg-section: #121212;
        --bg-section-alt: #181818;
        --text-primary: #f5f5f5;
        --text-secondary: #b0b0b0;
        --text-muted: #777777;
        --border-color: #2a2a2a;
        --border-light: #333333;
        --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 6px 24px rgba(0,0,0,0.4);
        --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
        --shadow-glow: 0 0 30px rgba(192,57,43,0.15);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        --max-width: 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: color var(--transition);
    }
    a:hover { color: #fff; }
    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 { list-style: none; }

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

    /* ===== Header / 导航 ===== */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        height: var(--header-height);
        background: rgba(15,15,15,0.92);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-color);
        transition: background var(--transition), border-color var(--transition);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }
    .header-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        text-decoration: none;
        flex-shrink: 0;
    }
    .logo-icon {
        width: 40px;
        height: 40px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        font-weight: 800;
        color: #fff;
        box-shadow: 0 0 20px rgba(192,57,43,0.3);
    }
    .logo-text {
        font-size: 22px;
        font-weight: 700;
        color: #fff;
        letter-spacing: -0.5px;
    }
    .logo-text span { color: var(--primary-light); }
    .header-nav {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .header-nav a {
        padding: 8px 18px;
        border-radius: var(--radius-sm);
        font-size: 15px;
        font-weight: 500;
        color: var(--text-secondary);
        transition: all var(--transition);
        position: relative;
    }
    .header-nav a:hover { color: #fff; background: rgba(255,255,255,0.06); }
    .header-nav a.active {
        color: #fff;
        background: rgba(192,57,43,0.2);
    }
    .header-nav a.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background: var(--primary-light);
        border-radius: 2px;
    }
    .header-cta {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .btn-cta {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 10px 24px;
        background: linear-gradient(135deg, var(--primary), var(--primary-dark));
        color: #fff;
        border-radius: var(--radius-sm);
        font-weight: 600;
        font-size: 14px;
        transition: all var(--transition);
        box-shadow: 0 4px 16px rgba(192,57,43,0.3);
    }
    .btn-cta:hover {
        background: linear-gradient(135deg, var(--primary-light), var(--primary));
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(192,57,43,0.4);
        color: #fff;
    }
    .header-toggle {
        display: none;
        width: 44px;
        height: 44px;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 22px;
        border-radius: var(--radius-sm);
        background: rgba(255,255,255,0.06);
    }
    .header-toggle:hover { background: rgba(255,255,255,0.12); }

    @media (max-width: 768px) {
        .header-nav {
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(15,15,15,0.98);
            backdrop-filter: blur(20px);
            flex-direction: column;
            padding: 16px;
            gap: 4px;
            border-bottom: 1px solid var(--border-color);
            transform: translateY(-120%);
            opacity: 0;
            transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            pointer-events: none;
        }
        .header-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: all;
        }
        .header-nav a { width: 100%; padding: 12px 16px; font-size: 16px; }
        .header-nav a.active::after { display: none; }
        .header-cta .btn-cta { display: none; }
        .header-toggle { display: flex; }
    }

    @media (max-width: 520px) {
        .logo-text { font-size: 18px; }
        .logo-icon { width: 34px; height: 34px; font-size: 16px; }
    }

    /* ===== 文章 Banner ===== */
    .article-banner {
        margin-top: var(--header-height);
        padding: 80px 0 60px;
        background: linear-gradient(135deg, var(--bg-dark-alt) 0%, var(--bg-section) 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-1.png') center/cover no-repeat;
        opacity: 0.08;
        pointer-events: none;
    }
    .article-banner .container {
        position: relative;
        z-index: 1;
    }
    .article-breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 14px;
        color: var(--text-muted);
        margin-bottom: 20px;
        flex-wrap: wrap;
    }
    .article-breadcrumb a { color: var(--text-muted); }
    .article-breadcrumb a:hover { color: var(--primary-light); }
    .article-breadcrumb .sep { color: var(--border-light); }
    .article-breadcrumb .current { color: var(--text-secondary); }
    .article-category-badge {
        display: inline-block;
        padding: 4px 14px;
        background: rgba(192,57,43,0.2);
        color: var(--primary-light);
        border-radius: 20px;
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 16px;
        border: 1px solid rgba(192,57,43,0.25);
    }
    .article-banner h1 {
        font-size: 40px;
        font-weight: 800;
        line-height: 1.25;
        color: #fff;
        max-width: 900px;
        margin-bottom: 20px;
        letter-spacing: -0.5px;
    }
    .article-meta {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 20px;
        color: var(--text-muted);
        font-size: 14px;
    }
    .article-meta span {
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .article-meta i { color: var(--primary-light); font-size: 14px; }
    .article-meta .tag-list {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
    }
    .article-meta .tag {
        padding: 2px 12px;
        background: rgba(255,255,255,0.06);
        border-radius: 12px;
        font-size: 12px;
        color: var(--text-secondary);
    }

    @media (max-width: 768px) {
        .article-banner { padding: 60px 0 40px; }
        .article-banner h1 { font-size: 28px; }
        .article-meta { gap: 12px; font-size: 13px; }
    }
    @media (max-width: 520px) {
        .article-banner h1 { font-size: 22px; }
    }

    /* ===== 文章正文 ===== */
    .article-main {
        padding: 60px 0 80px;
        background: var(--bg-section);
    }
    .article-layout {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: 48px;
    }
    .article-content {
        background: var(--bg-card);
        border-radius: var(--radius-lg);
        padding: 48px;
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
    }
    .article-content .featured-image {
        width: 100%;
        border-radius: var(--radius-md);
        margin-bottom: 32px;
        aspect-ratio: 16/9;
        object-fit: cover;
        background: var(--bg-dark-alt);
    }
    .article-content .content-body {
        font-size: 17px;
        line-height: 1.85;
        color: var(--text-primary);
    }
    .article-content .content-body p {
        margin-bottom: 20px;
    }
    .article-content .content-body h2,
    .article-content .content-body h3 {
        margin-top: 36px;
        margin-bottom: 16px;
        color: #fff;
        font-weight: 700;
    }
    .article-content .content-body h2 { font-size: 26px; }
    .article-content .content-body h3 { font-size: 21px; }
    .article-content .content-body ul,
    .article-content .content-body ol {
        margin-bottom: 20px;
        padding-left: 24px;
    }
    .article-content .content-body li { margin-bottom: 8px; }
    .article-content .content-body ul li { list-style: disc; }
    .article-content .content-body ol li { list-style: decimal; }
    .article-content .content-body blockquote {
        border-left: 4px solid var(--primary-light);
        padding: 16px 24px;
        margin: 24px 0;
        background: rgba(192,57,43,0.06);
        border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--text-secondary);
        font-style: italic;
    }
    .article-content .content-body a { color: var(--primary-light); text-decoration: underline; }
    .article-content .content-body a:hover { color: #fff; }
    .article-content .content-body img {
        border-radius: var(--radius-md);
        margin: 24px 0;
        width: 100%;
    }
    .article-content .content-body table {
        width: 100%;
        border-collapse: collapse;
        margin: 24px 0;
        font-size: 15px;
    }
    .article-content .content-body th,
    .article-content .content-body td {
        padding: 12px 16px;
        border: 1px solid var(--border-color);
        text-align: left;
    }
    .article-content .content-body th {
        background: var(--bg-dark-alt);
        color: #fff;
        font-weight: 600;
    }
    .article-content .content-body td { background: var(--bg-card); }

    .article-not-found {
        text-align: center;
        padding: 80px 40px;
        background: var(--bg-card);
        border-radius: var(--radius-lg);
        border: 1px solid var(--border-color);
    }
    .article-not-found i { font-size: 56px; color: var(--text-muted); margin-bottom: 24px; }
    .article-not-found h2 { font-size: 28px; color: #fff; margin-bottom: 12px; }
    .article-not-found p { color: var(--text-secondary); margin-bottom: 24px; }
    .article-not-found .btn-back {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 32px;
        background: var(--primary);
        color: #fff;
        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); color: #fff; }

    /* ===== 侧边栏 ===== */
    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 32px;
    }
    .sidebar-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 28px;
        border: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
    }
    .sidebar-card h3 {
        font-size: 18px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 20px;
        padding-bottom: 12px;
        border-bottom: 2px solid var(--border-color);
        display: flex;
        align-items: center;
        gap: 10px;
    }
    .sidebar-card h3 i { color: var(--primary-light); }
    .sidebar-list li {
        padding: 10px 0;
        border-bottom: 1px solid rgba(255,255,255,0.04);
    }
    .sidebar-list li:last-child { border-bottom: none; }
    .sidebar-list a {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        color: var(--text-secondary);
        transition: all var(--transition);
        font-size: 14px;
        line-height: 1.5;
    }
    .sidebar-list a:hover { color: #fff; }
    .sidebar-list .thumb {
        width: 60px;
        height: 60px;
        border-radius: var(--radius-sm);
        object-fit: cover;
        background: var(--bg-dark-alt);
        flex-shrink: 0;
    }
    .sidebar-list .info { flex: 1; min-width: 0; }
    .sidebar-list .info .title { display: block; font-weight: 500; margin-bottom: 4px; }
    .sidebar-list .info .date { font-size: 12px; color: var(--text-muted); }

    .sidebar-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }
    .sidebar-tags a {
        padding: 4px 14px;
        background: rgba(255,255,255,0.05);
        border-radius: 16px;
        font-size: 13px;
        color: var(--text-secondary);
        border: 1px solid var(--border-color);
        transition: all var(--transition);
    }
    .sidebar-tags a:hover {
        background: rgba(192,57,43,0.15);
        color: var(--primary-light);
        border-color: rgba(192,57,43,0.3);
    }
    .sidebar-cta-box {
        background: linear-gradient(135deg, var(--primary-dark), var(--secondary));
        border: none;
        text-align: center;
    }
    .sidebar-cta-box h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.15); }
    .sidebar-cta-box p { color: rgba(255,255,255,0.7); font-size: 14px; margin-bottom: 20px; line-height: 1.6; }
    .sidebar-cta-box .btn-sidebar {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 28px;
        background: #fff;
        color: var(--primary-dark);
        border-radius: var(--radius-sm);
        font-weight: 700;
        font-size: 14px;
        transition: all var(--transition);
    }
    .sidebar-cta-box .btn-sidebar:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }

    @media (max-width: 1024px) {
        .article-layout { grid-template-columns: 1fr; gap: 36px; }
        .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    }
    @media (max-width: 768px) {
        .article-content { padding: 28px 20px; }
        .article-content .content-body { font-size: 16px; }
        .article-sidebar { grid-template-columns: 1fr; }
    }
    @media (max-width: 520px) {
        .article-content { padding: 20px 16px; }
        .article-content .content-body { font-size: 15px; }
    }

    /* ===== 页脚 ===== */
    .footer {
        background: var(--bg-dark-alt);
        border-top: 1px solid var(--border-color);
        padding: 60px 0 32px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 40px;
        margin-bottom: 40px;
    }
    .footer-brand .logo-text { font-size: 24px; display: block; margin-bottom: 16px; }
    .footer-brand p { color: var(--text-muted); font-size: 14px; line-height: 1.7; max-width: 320px; }
    .footer-col h4 {
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 20px;
        position: relative;
        padding-bottom: 10px;
    }
    .footer-col h4::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 30px;
        height: 2px;
        background: var(--primary-light);
        border-radius: 2px;
    }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul a {
        color: var(--text-muted);
        font-size: 14px;
        transition: all var(--transition);
    }
    .footer-col ul a:hover { color: var(--primary-light); padding-left: 4px; }
    .footer-bottom {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding-top: 28px;
        border-top: 1px solid var(--border-color);
        font-size: 13px;
        color: var(--text-muted);
        flex-wrap: wrap;
        gap: 16px;
    }
    .footer-bottom .social { display: flex; gap: 14px; }
    .footer-bottom .social a {
        width: 38px;
        height: 38px;
        border-radius: 50%;
        background: rgba(255,255,255,0.06);
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--text-muted);
        transition: all var(--transition);
        font-size: 16px;
    }
    .footer-bottom .social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

    @media (max-width: 768px) {
        .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
        .footer-brand { grid-column: 1 / -1; }
        .footer-bottom { flex-direction: column; text-align: center; }
    }
    @media (max-width: 520px) {
        .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        .footer { padding: 40px 0 24px; }
    }

    /* ===== 其他工具类 ===== */
    .text-center { text-align: center; }
    .mt-8 { margin-top: 8px; }
    .mt-16 { margin-top: 16px; }
    .mt-24 { margin-top: 24px; }
    .mb-16 { margin-bottom: 16px; }
    .mb-24 { margin-bottom: 24px; }
    .gap-8 { gap: 8px; }
    .gap-12 { gap: 12px; }
    .flex { display: flex; }
    .flex-wrap { flex-wrap: wrap; }
    .items-center { align-items: center; }
    .justify-between { justify-content: space-between; }

    /* ===== 加载 / 过渡 ===== */
    .fade-in { animation: fadeIn 0.6s ease forwards; }
    @keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #c0392b;
            --primary-dark: #a93226;
            --primary-light: #e74c3c;
            --accent: #f39c12;
            --accent-dark: #e67e22;
            --bg-dark: #0d0d0d;
            --bg-section: #111111;
            --bg-card: #1a1a1a;
            --bg-card-hover: #222222;
            --bg-body: #0a0a0a;
            --text-primary: #f5f5f5;
            --text-secondary: #b0b0b0;
            --text-muted: #777777;
            --border-color: #2a2a2a;
            --border-light: #333333;
            --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 6px 24px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.5);
            --shadow-red: 0 4px 20px rgba(192, 57, 43, 0.25);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container-width: 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-body);
            min-height: 100vh;
        }

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

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        button:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

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

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

        /* ===== Header ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 10, 10, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            transition: background var(--transition);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
        }

        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            box-shadow: var(--shadow-red);
        }

        .logo-text {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .logo-text span {
            color: var(--primary-light);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .header-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .header-nav a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }
        .header-nav a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: var(--shadow-red);
        }
        .header-nav a.active::after {
            display: none;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--primary);
            color: #fff !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition);
            box-shadow: var(--shadow-red);
        }
        .btn-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 24px rgba(192, 57, 43, 0.35);
        }
        .btn-cta i {
            font-size: 14px;
        }

        .header-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .header-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* ===== 移动端导航 ===== */
        @media (max-width: 768px) {
            .header-nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(10, 10, 10, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-110%);
                opacity: 0;
                transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
                pointer-events: none;
            }
            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 16px;
            }
            .header-cta .btn-cta {
                display: none;
            }
            .header-toggle {
                display: flex;
            }
            .header-cta .btn-cta.mobile-visible {
                display: inline-flex;
                font-size: 13px;
                padding: 8px 16px;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }
            .logo-text {
                font-size: 18px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 18px;
            }
        }

        /* ===== Banner ===== */
        .category-banner {
            margin-top: var(--header-height);
            padding: 120px 0 80px;
            background: linear-gradient(135deg, #0d0d0d 0%, #1a0a0a 50%, #0d0d0d 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.2;
            z-index: 0;
        }
        .category-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(192, 57, 43, 0.15) 0%, transparent 70%);
            z-index: 1;
        }
        .category-banner .container {
            position: relative;
            z-index: 2;
        }
        .category-banner h1 {
            font-size: 48px;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 60%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-banner p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.7;
        }
        .category-banner .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 24px;
        }
        .category-banner .banner-tags span {
            padding: 6px 16px;
            background: rgba(192, 57, 43, 0.15);
            border: 1px solid rgba(192, 57, 43, 0.25);
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary-light);
        }

        @media (max-width: 768px) {
            .category-banner {
                padding: 100px 0 60px;
                min-height: 280px;
            }
            .category-banner h1 {
                font-size: 32px;
            }
            .category-banner p {
                font-size: 16px;
            }
        }
        @media (max-width: 480px) {
            .category-banner h1 {
                font-size: 26px;
            }
            .category-banner p {
                font-size: 14px;
            }
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: 80px 0;
        }
        .section-dark {
            background: var(--bg-section);
        }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-header h2 span {
            color: var(--primary-light);
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-header .badge-tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(192, 57, 43, 0.12);
            border: 1px solid rgba(192, 57, 43, 0.2);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary-light);
            letter-spacing: 0.5px;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 26px;
            }
            .section-header p {
                font-size: 15px;
            }
        }
        @media (max-width: 480px) {
            .section-header h2 {
                font-size: 22px;
            }
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .card:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            display: block;
            transition: transform 0.4s ease;
        }
        .card:hover .card-img {
            transform: scale(1.03);
        }
        .card-body {
            padding: 22px 24px 26px;
        }
        .card-body .tag {
            display: inline-block;
            padding: 2px 12px;
            background: rgba(192, 57, 43, 0.12);
            border-radius: 12px;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary-light);
            margin-bottom: 10px;
        }
        .card-body h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-body h3 a {
            color: var(--text-primary);
            transition: color var(--transition);
        }
        .card-body h3 a:hover {
            color: var(--primary-light);
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .card-body .meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 14px;
            font-size: 12px;
            color: var(--text-muted);
        }
        .card-body .meta i {
            margin-right: 4px;
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .card-body {
                padding: 18px 18px 22px;
            }
        }

        /* ===== 特色板块（介绍区） ===== */
        .intro-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .intro-block .intro-img {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-color);
        }
        .intro-block .intro-img img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            display: block;
        }
        .intro-block .intro-content h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .intro-block .intro-content h3 span {
            color: var(--primary-light);
        }
        .intro-block .intro-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .intro-block .intro-content ul {
            display: grid;
            gap: 10px;
        }
        .intro-block .intro-content ul li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 15px;
            color: var(--text-secondary);
        }
        .intro-block .intro-content ul li i {
            color: var(--primary-light);
            margin-top: 3px;
            flex-shrink: 0;
        }

        @media (max-width: 900px) {
            .intro-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-block .intro-content h3 {
                font-size: 24px;
            }
            .intro-block .intro-img {
                order: -1;
            }
        }
        @media (max-width: 480px) {
            .intro-block .intro-content h3 {
                font-size: 20px;
            }
            .intro-block .intro-content p {
                font-size: 14px;
            }
        }

        /* ===== 数据 / 统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 20px;
            text-align: center;
            transition: all var(--transition);
        }
        .stat-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-red);
        }
        .stat-card .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-card .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .stat-card .stat-icon {
            font-size: 28px;
            color: var(--primary-light);
            margin-bottom: 12px;
            opacity: 0.7;
        }

        @media (max-width: 900px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-card .stat-number {
                font-size: 30px;
            }
        }

        /* ===== 流程 / 步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            position: relative;
            transition: all var(--transition);
            counter-increment: step;
        }
        .step-card:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-card::before {
            content: counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 48px;
            font-weight: 900;
            color: rgba(192, 57, 43, 0.08);
            line-height: 1;
        }
        .step-card .step-icon {
            width: 52px;
            height: 52px;
            background: rgba(192, 57, 43, 0.12);
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary-light);
            margin-bottom: 18px;
        }
        .step-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .step-card {
                padding: 28px 22px 26px;
            }
        }

        /* ===== 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: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-item.open {
            border-color: var(--primary);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            text-align: left;
            gap: 12px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
            color: var(--primary-light);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 640px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 14px;
            }
            .faq-answer p {
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, #1a0a0a 0%, #0d0d0d 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(192, 57, 43, 0.08) 0%, transparent 70%);
            z-index: 0;
        }
        .cta-block>* {
            position: relative;
            z-index: 1;
        }
        .cta-block h3 {
            font-size: 32px;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .cta-block h3 span {
            color: var(--primary-light);
        }
        .cta-block p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 540px;
            margin: 0 auto 28px;
        }
        .cta-block .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: var(--primary);
            color: #fff !important;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 16px;
            transition: all var(--transition);
            box-shadow: var(--shadow-red);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(192, 57, 43, 0.4);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            background: transparent;
            color: var(--text-primary) !important;
            border: 2px solid var(--border-light);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 16px;
            transition: all var(--transition);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary-light) !important;
            transform: translateY(-2px);
        }

        @media (max-width: 640px) {
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h3 {
                font-size: 24px;
            }
            .cta-block p {
                font-size: 15px;
            }
            .btn-primary,
            .btn-outline {
                padding: 12px 28px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 标签云 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
            margin-top: 16px;
        }
        .tag-cloud a {
            padding: 8px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .tag-cloud a:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: rgba(192, 57, 43, 0.05);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .footer {
            background: #080808;
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border-color);
        }
        .footer-brand .logo-text {
            display: inline-block;
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 24px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-bottom .social {
            display: flex;
            gap: 12px;
        }
        .footer-bottom .social a {
            width: 38px;
            height: 38px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--text-muted);
            transition: all var(--transition);
        }
        .footer-bottom .social a:hover {
            border-color: var(--primary);
            color: var(--primary-light);
            background: rgba(192, 57, 43, 0.08);
        }

        @media (max-width: 900px) {
            .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;
            }
            .footer {
                padding: 40px 0 20px;
            }
        }

        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-40 {
            margin-top: 40px;
        }
        .gap-16 {
            gap: 16px;
        }

        /* ===== 骨架过渡 ===== */
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== 选中高亮 ===== */
        ::selection {
            background: rgba(192, 57, 43, 0.35);
            color: #fff;
        }

        /* ===== 滚动条 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-body);
        }
        ::-webkit-scrollbar-thumb {
            background: #333;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #555;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .breadcrumb span {
            color: var(--text-muted);
        }
        .breadcrumb i {
            font-size: 10px;
            color: var(--text-muted);
        }