/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #D93B2B;
            --primary-dark: #B82E1F;
            --primary-light: #F6E3E0;
            --secondary: #F5A623;
            --secondary-dark: #D4891A;
            --accent: #2D9CDB;
            --dark: #1B1B2F;
            --dark-light: #2C2C44;
            --bg: #F9F7F5;
            --bg-card: #FFFFFF;
            --text: #333333;
            --text-light: #777777;
            --text-white: #FFFFFF;
            --border: #E8E3DE;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.15);
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --header-top-bg: #1B1B2F;
            --nav-bg: #FFFFFF;
            --footer-bg: #1B1B2F;
            --footer-text: #B0B0C0;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section { padding: 80px 0; }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--dark);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .text-center { text-align: center; }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 15px rgba(217,59,43,0.35);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 8px 25px rgba(217,59,43,0.45);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: var(--secondary);
            color: var(--text-white);
            box-shadow: 0 4px 15px rgba(245,166,35,0.35);
        }
        .btn-secondary:hover {
            background: var(--secondary-dark);
            box-shadow: 0 8px 25px rgba(245,166,35,0.45);
            transform: translateY(-2px);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid var(--text-white);
        }
        .btn-outline:hover {
            background: var(--text-white);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.9rem;
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-light);
            color: var(--primary);
        }
        .badge-secondary {
            background: #FFF3E0;
            color: var(--secondary-dark);
        }
        .badge-accent {
            background: #E3F2FD;
            color: var(--accent);
        }
        .tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.8rem;
            background: var(--bg);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0 auto 16px;
        }
        .divider-light {
            background: rgba(255,255,255,0.4);
        }

        /* ===== 顶部信息条 ===== */
        .header-top {
            background: var(--header-top-bg);
            color: rgba(255,255,255,0.8);
            font-size: 0.85rem;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.05);
        }
        .header-top .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .header-top a {
            color: rgba(255,255,255,0.8);
            transition: color var(--transition);
        }
        .header-top a:hover { color: var(--secondary); }
        .header-top-left {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .header-top-left span { display: inline-flex; align-items: center; gap: 6px; }
        .header-top-right {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-top-right .social-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            font-size: 0.8rem;
            transition: all var(--transition);
        }
        .header-top-right .social-link:hover {
            background: var(--secondary);
            color: var(--dark);
        }

        /* ===== 主导航 ===== */
        .main-nav {
            background: var(--nav-bg);
            box-shadow: 0 2px 20px rgba(0,0,0,0.06);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow var(--transition);
        }
        .main-nav.scrolled {
            box-shadow: 0 4px 30px rgba(0,0,0,0.12);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -0.5px;
        }
        .nav-logo .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-white);
            font-weight: 800;
            font-size: 1.2rem;
        }
        .nav-logo span { color: var(--primary); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-links a.active {
            background: var(--primary);
            color: var(--text-white);
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-cta .btn {
            padding: 10px 24px;
            font-size: 0.9rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--dark);
            cursor: pointer;
            padding: 4px;
        }
        .mobile-menu {
            display: none;
            background: var(--nav-bg);
            border-top: 1px solid var(--border);
            padding: 16px 24px;
            box-shadow: var(--shadow-md);
        }
        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            color: var(--text);
            transition: all var(--transition);
        }
        .mobile-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .mobile-menu a.active {
            background: var(--primary);
            color: var(--text-white);
        }
        .mobile-menu .btn {
            margin-top: 12px;
            width: 100%;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
            overflow: hidden;
            padding: 40px 0;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.30;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(217,59,43,0.15) 0%, transparent 70%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
            color: var(--text-white);
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 24px;
            border-radius: 50px;
            background: rgba(255,255,255,0.12);
            backdrop-filter: blur(10px);
            font-size: 0.85rem;
            letter-spacing: 2px;
            margin-bottom: 24px;
            border: 1px solid rgba(255,255,255,0.15);
        }
        .hero h1 {
            font-size: 3.6rem;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -1px;
            text-shadow: 0 2px 30px rgba(0,0,0,0.3);
        }
        .hero h1 span {
            background: linear-gradient(135deg, var(--secondary) 0%, #FF6B6B 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.8);
            max-width: 680px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-stats {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 48px;
            margin-top: 60px;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .num {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            margin-top: 4px;
        }

        /* ===== 品牌介绍 ===== */
        .intro-section {
            background: var(--bg-card);
        }
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            position: relative;
        }
        .intro-image::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(217,59,43,0.10) 0%, transparent 60%);
        }
        .intro-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }
        .intro-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .intro-content .divider {
            margin: 0 0 20px;
        }
        .intro-content p {
            color: var(--text-light);
            margin-bottom: 16px;
            line-height: 1.8;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 24px;
        }
        .intro-feature-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            border-left: 3px solid var(--primary);
        }
        .intro-feature-item i {
            color: var(--primary);
            font-size: 1.2rem;
        }
        .intro-feature-item span {
            font-weight: 500;
            font-size: 0.95rem;
        }

        /* ===== 分类 / 服务卡片 ===== */
        .services-section {
            background: var(--bg);
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .service-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            cursor: pointer;
        }
        .service-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-6px);
        }
        .service-card-img {
            height: 220px;
            overflow: hidden;
            position: relative;
        }
        .service-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .service-card:hover .service-card-img img {
            transform: scale(1.08);
        }
        .service-card-img .badge {
            position: absolute;
            top: 16px;
            left: 16px;
        }
        .service-card-body {
            padding: 24px;
        }
        .service-card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .service-card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.6;
        }
        .service-card-body .btn {
            margin-top: 16px;
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        /* ===== 资讯列表 ===== */
        .news-section {
            background: var(--bg-card);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .news-card {
            background: var(--bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .news-card-img {
            height: 200px;
            overflow: hidden;
            background: var(--border);
        }
        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .news-card:hover .news-card-img img {
            transform: scale(1.06);
        }
        .news-card-body {
            padding: 20px 24px 24px;
        }
        .news-card-body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .news-card-body .meta .badge {
            font-size: 0.7rem;
            padding: 2px 10px;
        }
        .news-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-body p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-body .news-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 12px;
            font-weight: 600;
            color: var(--primary);
            font-size: 0.9rem;
        }
        .news-card-body .news-link i {
            transition: transform var(--transition);
        }
        .news-card-body .news-link:hover i {
            transform: translateX(4px);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            background: var(--bg);
            border-radius: var(--radius-md);
        }
        .news-empty i {
            font-size: 3rem;
            color: var(--border);
            margin-bottom: 16px;
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            position: relative;
            background: var(--dark);
            overflow: hidden;
            padding: 80px 0;
        }
        .stats-section .stats-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .stats-section .container {
            position: relative;
            z-index: 1;
        }
        .stats-section .section-title {
            color: var(--text-white);
        }
        .stats-section .section-subtitle {
            color: rgba(255,255,255,0.6);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-top: 20px;
        }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: rgba(255,255,255,0.06);
            border-radius: var(--radius-md);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.08);
            transition: all var(--transition);
        }
        .stat-card:hover {
            background: rgba(255,255,255,0.10);
            transform: translateY(-4px);
        }
        .stat-card .icon {
            font-size: 2.4rem;
            color: var(--secondary);
            margin-bottom: 12px;
        }
        .stat-card .num {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
        }
        .stat-card .num span {
            font-size: 1.6rem;
            font-weight: 400;
            opacity: 0.7;
        }
        .stat-card .label {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.6);
            margin-top: 8px;
        }

        /* ===== 流程步骤 ===== */
        .process-section {
            background: var(--bg);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
            z-index: 0;
            opacity: 0.3;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .process-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .process-step .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 15px rgba(217,59,43,0.30);
        }
        .process-step:nth-child(2) .step-num { background: var(--secondary); box-shadow: 0 4px 15px rgba(245,166,35,0.30); }
        .process-step:nth-child(3) .step-num { background: var(--accent); box-shadow: 0 4px 15px rgba(45,156,219,0.30); }
        .process-step:nth-child(4) .step-num { background: #27AE60; box-shadow: 0 4px 15px rgba(39,174,96,0.30); }
        .process-step h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-card);
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            background: var(--bg-card);
            font-weight: 600;
            font-size: 1rem;
            color: var(--dark);
            transition: background var(--transition);
            user-select: none;
        }
        .faq-question:hover {
            background: var(--bg);
        }
        .faq-question i {
            color: var(--primary);
            font-size: 1.2rem;
            transition: transform var(--transition);
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            line-height: 1.7;
            background: var(--bg);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 16px 24px 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            position: relative;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            overflow: hidden;
            padding: 80px 0;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.85);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-section .btn-outline {
            border-color: rgba(255,255,255,0.6);
        }
        .cta-section .btn-outline:hover {
            background: var(--text-white);
            color: var(--primary);
            border-color: var(--text-white);
        }

        /* ===== 合作伙伴 ===== */
        .partners-section {
            background: var(--bg);
            padding: 60px 0;
        }
        .partners-grid {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 40px;
            flex-wrap: wrap;
            opacity: 0.6;
        }
        .partners-grid .partner-item {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-light);
            letter-spacing: 1px;
            padding: 8px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--footer-bg);
            color: var(--footer-text);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .nav-logo {
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .footer-brand .nav-logo .logo-icon {
            background: var(--primary);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
            color: var(--footer-text);
        }
        .footer-brand .social-links {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .footer-brand .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: var(--footer-text);
            font-size: 1rem;
            transition: all var(--transition);
        }
        .footer-brand .social-links a:hover {
            background: var(--primary);
            color: var(--text-white);
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.9rem;
            color: var(--footer-text);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.8rem; }
            .intro-grid { gap: 40px; }
            .services-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .process-steps { grid-template-columns: repeat(2, 1fr); }
            .process-steps::before { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
        }

        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-title { font-size: 1.8rem; }
            .section-subtitle { font-size: 1rem; margin-bottom: 32px; }
            .hero { min-height: 70vh; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 24px; margin-top: 36px; }
            .hero-stat-item .num { font-size: 1.8rem; }
            .intro-grid { grid-template-columns: 1fr; gap: 30px; }
            .intro-features { grid-template-columns: 1fr; }
            .services-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-card { padding: 24px 16px; }
            .stat-card .num { font-size: 2rem; }
            .process-steps { grid-template-columns: 1fr; gap: 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .nav-links { display: none; }
            .nav-cta .btn { display: none; }
            .nav-toggle { display: block; }
            .mobile-menu.open { display: block; }
            .header-top-left span:not(:first-child) { display: none; }
            .cta-section h2 { font-size: 1.8rem; }
            .partners-grid { gap: 16px; }
            .partners-grid .partner-item { font-size: 1rem; padding: 6px 16px; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 0.95rem; }
            .hero-actions .btn { width: 100%; }
            .stats-grid { grid-template-columns: 1fr; }
            .news-card-body { padding: 16px 18px 20px; }
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .footer-grid { gap: 20px; }
            .header-top { font-size: 0.75rem; }
            .nav-logo { font-size: 1.3rem; }
            .nav-logo .logo-icon { width: 32px; height: 32px; font-size: 1rem; }
        }

/* roulang page: article */
:root {
  --primary: #1e40af;
  --primary-light: #2563eb;
  --primary-dark: #1e3a8a;
  --secondary: #d97706;
  --secondary-light: #f59e0b;
  --accent: #10b981;
  --bg: #f8fafc;
  --bg-alt: #f1f5f9;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-secondary: #64748b;
  --text-light: #94a3b8;
  --text-white: #ffffff;
  --border: #e2e8f0;
  --border-light: #f1f5f9;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 40px rgba(0,0,0,0.10);
  --shadow-lg: 0 16px 60px rgba(0,0,0,0.14);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1200px;
  --content-width: 800px;
  --header-height: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); font-size: 16px; line-height: 1.7; color: var(--text); background: var(--bg); }
a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: var(--content-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: var(--text-white); }
.section-title { font-size: 2rem; font-weight: 800; line-height: 1.25; margin-bottom: 12px; color: var(--text); }
.section-subtitle { font-size: 1.1rem; color: var(--text-secondary); max-width: 600px; margin-bottom: 48px; line-height: 1.6; }
.section-dark .section-title { color: var(--text-white); }
.section-dark .section-subtitle { color: var(--text-light); }
.section-center { text-align: center; }
.section-center .section-subtitle { margin-left: auto; margin-right: auto; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 28px; border-radius: var(--radius-sm); font-size: 0.95rem; font-weight: 600; line-height: 1.4; border: 2px solid transparent; cursor: pointer; transition: var(--transition); text-align: center; white-space: nowrap; }
.btn-primary { background: var(--primary); color: var(--text-white); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: var(--text-white); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(30,64,175,0.3); }
.btn-secondary { background: var(--secondary); color: var(--text-white); border-color: var(--secondary); }
.btn-secondary:hover { background: #b45309; border-color: #b45309; color: var(--text-white); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(217,119,6,0.3); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }
.btn-light { background: var(--text-white); color: var(--primary); border-color: var(--text-white); }
.btn-light:hover { background: var(--bg-alt); color: var(--primary-dark); transform: translateY(-2px); }
.btn-sm { padding: 8px 20px; font-size: 0.85rem; }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; }
.btn i { font-size: 1.1em; }
.badge { display: inline-flex; align-items: center; gap: 4px; padding: 4px 14px; border-radius: 50px; font-size: 0.8rem; font-weight: 600; background: rgba(30,64,175,0.1); color: var(--primary); }
.badge-secondary { background: rgba(217,119,6,0.1); color: var(--secondary); }
.badge-accent { background: rgba(16,185,129,0.1); color: var(--accent); }
.tag { display: inline-block; padding: 4px 12px; border-radius: 6px; font-size: 0.78rem; font-weight: 500; background: var(--bg-alt); color: var(--text-secondary); transition: var(--transition); }
.tag:hover { background: var(--primary); color: var(--text-white); }
.card { background: var(--text-white); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transition: var(--transition); }
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.card-body { padding: 24px; }
.card-title { font-size: 1.15rem; font-weight: 700; line-height: 1.4; margin-bottom: 8px; color: var(--text); }
.card-text { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; }
.text-ellipsis-2 { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-8 { gap: 8px; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-24 { gap: 24px; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mt-48 { margin-top: 48px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.text-center { text-align: center; }
.text-sm { font-size: 0.88rem; }
.text-xs { font-size: 0.8rem; }
.text-muted { color: var(--text-secondary); }
.text-white { color: var(--text-white); }

/* ===== Navigation ===== */
.main-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.96); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); height: var(--header-height); }
.main-nav .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo { display: flex; align-items: center; gap: 8px; font-size: 1.35rem; font-weight: 800; color: var(--text); text-decoration: none; }
.nav-logo:hover { color: var(--text); }
.logo-icon { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 10px; background: var(--primary); color: #fff; font-size: 1.2rem; font-weight: 800; }
.nav-logo span { font-weight: 300; color: var(--text-secondary); }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links 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-links a:hover { color: var(--primary); background: rgba(30,64,175,0.06); }
.nav-links a.active { color: var(--primary); background: rgba(30,64,175,0.08); font-weight: 600; }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-toggle { display: none; background: none; border: none; font-size: 1.4rem; color: var(--text); cursor: pointer; padding: 8px; border-radius: 8px; transition: var(--transition); }
.nav-toggle:hover { background: var(--bg-alt); }
.mobile-menu { display: none; position: fixed; top: var(--header-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-bottom: 1px solid var(--border); padding: 16px 24px; flex-direction: column; gap: 8px; box-shadow: var(--shadow-md); z-index: 999; }
.mobile-menu.open { display: flex; }
.mobile-menu a { padding: 12px 16px; border-radius: var(--radius-sm); font-size: 1rem; font-weight: 500; color: var(--text-secondary); transition: var(--transition); }
.mobile-menu a:hover { background: var(--bg-alt); color: var(--primary); }
.mobile-menu a.active { color: var(--primary); background: rgba(30,64,175,0.08); font-weight: 600; }
.mobile-menu .btn { margin-top: 8px; width: 100%; justify-content: center; }

/* ===== Article Banner ===== */
.article-banner { position: relative; padding: 140px 0 60px; margin-top: var(--header-height); background: var(--bg-dark); overflow: hidden; }
.article-banner-bg { position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.25; }
.article-banner-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,23,42,0.85) 0%, rgba(30,64,175,0.6) 100%); }
.article-banner .container-narrow { position: relative; z-index: 2; }
.article-badge { display: inline-flex; align-items: center; gap: 6px; padding: 6px 16px; border-radius: 50px; font-size: 0.82rem; font-weight: 600; background: rgba(255,255,255,0.15); color: var(--text-white); backdrop-filter: blur(4px); margin-bottom: 20px; }
.article-banner h1 { font-size: 2.5rem; font-weight: 800; line-height: 1.25; color: var(--text-white); margin-bottom: 16px; letter-spacing: -0.02em; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px 24px; font-size: 0.9rem; color: rgba(255,255,255,0.7); }
.article-meta i { margin-right: 6px; }
.article-meta span { display: inline-flex; align-items: center; }

/* ===== Article Content ===== */
.article-content-wrap { padding: 48px 0 32px; }
.article-body { font-size: 1.05rem; line-height: 1.85; color: var(--text); }
.article-body p { margin-bottom: 1.5em; }
.article-body h2, .article-body h3, .article-body h4 { margin-top: 1.8em; margin-bottom: 0.8em; font-weight: 700; line-height: 1.3; color: var(--text); }
.article-body h2 { font-size: 1.7rem; }
.article-body h3 { font-size: 1.35rem; }
.article-body ul, .article-body ol { margin-bottom: 1.5em; padding-left: 1.8em; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li { margin-bottom: 0.5em; }
.article-body img { border-radius: var(--radius); margin: 2em 0; box-shadow: var(--shadow); }
.article-body blockquote { border-left: 4px solid var(--primary); padding: 16px 24px; margin: 1.8em 0; background: var(--bg-alt); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font-style: italic; color: var(--text-secondary); }
.article-body a { color: var(--primary-light); text-decoration: underline; text-underline-offset: 2px; }
.article-body a:hover { color: var(--primary); }
.article-body table { width: 100%; border-collapse: collapse; margin: 1.8em 0; font-size: 0.95rem; }
.article-body th, .article-body td { padding: 12px 16px; border: 1px solid var(--border); text-align: left; }
.article-body th { background: var(--bg-alt); font-weight: 600; }
.article-body code { background: var(--bg-alt); padding: 2px 8px; border-radius: 4px; font-size: 0.9em; font-family: 'Courier New', monospace; }
.article-body pre { background: var(--bg-dark); color: #e2e8f0; padding: 20px 24px; border-radius: var(--radius); overflow-x: auto; margin: 1.8em 0; font-size: 0.9rem; line-height: 1.6; }

/* ===== Article Footer ===== */
.article-foot { padding: 32px 0; border-top: 1px solid var(--border); margin-top: 32px; }
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.article-share { display: flex; align-items: center; gap: 12px; }
.article-share span { font-size: 0.9rem; color: var(--text-secondary); font-weight: 500; }
.article-share a { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: var(--bg-alt); color: var(--text-secondary); font-size: 1rem; transition: var(--transition); }
.article-share a:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); }

/* ===== Article Navigation (Prev/Next) ===== */
.article-nav { padding: 32px 0; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 16px; justify-content: space-between; }
.article-nav a { display: flex; align-items: center; gap: 12px; padding: 16px 24px; border-radius: var(--radius-sm); background: var(--bg-alt); transition: var(--transition); flex: 1; min-width: 200px; color: var(--text); }
.article-nav a:hover { background: var(--primary); color: var(--text-white); }
.article-nav a:hover .nav-dir { color: rgba(255,255,255,0.7); }
.article-nav a:hover .nav-title { color: var(--text-white); }
.article-nav .nav-dir { font-size: 0.8rem; color: var(--text-light); font-weight: 500; display: block; margin-bottom: 2px; }
.article-nav .nav-title { font-size: 0.92rem; font-weight: 600; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.article-nav .nav-next { text-align: right; flex-direction: row-reverse; }

/* ===== Related Posts ===== */
.related-posts { padding: 64px 0; background: var(--bg-alt); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.related-card { background: var(--text-white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: var(--transition); }
.related-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.related-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.related-card-body { padding: 20px; }
.related-card-body .badge { margin-bottom: 8px; }
.related-card-body h3 { font-size: 1.05rem; font-weight: 700; line-height: 1.4; margin-bottom: 8px; }
.related-card-body h3 a { color: var(--text); }
.related-card-body h3 a:hover { color: var(--primary); }
.related-card-body .text-sm { font-size: 0.82rem; color: var(--text-light); }

/* ===== CTA Section ===== */
.cta-section { padding: 80px 0; background: var(--bg-dark); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: radial-gradient(ellipse at 30% 50%, rgba(30,64,175,0.3) 0%, transparent 70%), radial-gradient(ellipse at 70% 50%, rgba(217,119,6,0.15) 0%, transparent 70%); }
.cta-section .container { position: relative; z-index: 2; }
.cta-title { font-size: 2.2rem; font-weight: 800; color: var(--text-white); margin-bottom: 12px; }
.cta-text { font-size: 1.1rem; color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 32px; }
.cta-buttons { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }

/* ===== Not Found ===== */
.not-found-wrap { padding: 120px 0 80px; margin-top: var(--header-height); text-align: center; }
.not-found-icon { font-size: 4rem; color: var(--text-light); margin-bottom: 24px; }
.not-found-wrap h2 { font-size: 1.8rem; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.not-found-wrap p { color: var(--text-secondary); margin-bottom: 24px; font-size: 1.05rem; }
.not-found-wrap .btn { margin-top: 8px; }

/* ===== Footer ===== */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.8); padding: 60px 0 0; }
.footer .nav-logo { color: var(--text-white); margin-bottom: 16px; }
.footer .nav-logo span { color: rgba(255,255,255,0.5); }
.footer p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
.footer-brand p { margin-top: 16px; }
.social-links { display: flex; gap: 12px; margin-top: 20px; }
.social-links a { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.6); font-size: 1.1rem; transition: var(--transition); }
.social-links a:hover { background: var(--primary); color: var(--text-white); transform: translateY(-3px); }
.footer-col h4 { font-size: 1rem; font-weight: 600; color: var(--text-white); margin-bottom: 20px; }
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col ul li a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: var(--transition); display: inline-flex; align-items: center; gap: 8px; }
.footer-col ul li a:hover { color: var(--text-white); transform: translateX(4px); }
.footer-col ul li a i { width: 16px; text-align: center; }
.footer-bottom { padding: 24px 0; text-align: center; }
.footer-bottom p { font-size: 0.85rem; color: rgba(255,255,255,0.4); max-width: 100%; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .article-banner h1 { font-size: 2rem; }
}
@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .section-title { font-size: 1.6rem; }
  .section-subtitle { font-size: 1rem; margin-bottom: 32px; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-toggle { display: flex; align-items: center; justify-content: center; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .related-grid { grid-template-columns: 1fr; }
  .article-banner { padding: 120px 0 40px; }
  .article-banner h1 { font-size: 1.6rem; }
  .article-meta { gap: 12px 16px; font-size: 0.82rem; flex-wrap: wrap; }
  .article-body { font-size: 1rem; }
  .article-body h2 { font-size: 1.4rem; }
  .article-body h3 { font-size: 1.15rem; }
  .article-nav { flex-direction: column; }
  .article-nav a { min-width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-brand p { max-width: 100%; }
  .cta-title { font-size: 1.6rem; }
  .cta-text { font-size: 1rem; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .container-narrow { padding: 0 16px; }
  .section { padding: 40px 0; }
  .section-title { font-size: 1.35rem; }
  .grid-4 { grid-template-columns: 1fr; }
  .article-banner h1 { font-size: 1.3rem; }
  .article-body { font-size: 0.95rem; }
  .article-body table { font-size: 0.82rem; }
  .article-body th, .article-body td { padding: 8px 10px; }
  .btn { padding: 10px 22px; font-size: 0.88rem; }
  .btn-lg { padding: 14px 28px; font-size: 0.95rem; }
  .footer-grid { gap: 24px; }
  .cta-title { font-size: 1.35rem; }
  .not-found-wrap { padding: 100px 0 60px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #D9383E;
            --primary-dark: #B82D32;
            --primary-light: #FDE8E9;
            --secondary: #FF8C00;
            --secondary-light: #FFF3E0;
            --accent: #F59E0B;
            --dark: #1A1A2E;
            --dark-soft: #2D2D44;
            --bg: #F8F9FA;
            --bg-alt: #FFFFFF;
            --text: #1E293B;
            --text-light: #64748B;
            --text-white: #F1F5F9;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius: 16px;
            --radius-sm: 8px;
            --radius-lg: 24px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 16px 50px rgba(0, 0, 0, 0.14);
            --shadow-btn: 0 4px 15px rgba(217, 56, 62, 0.35);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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(--bg);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--dark);
            margin-bottom: 0.5rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        :focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
        }
        ::selection {
            background: var(--primary);
            color: #fff;
        }

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

        /* ===== 导航 ===== */
        .main-nav {
            position: sticky;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            z-index: 1050;
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }
        .main-nav.scrolled {
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.06);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--dark);
            text-decoration: none;
            flex-shrink: 0;
        }
        .nav-logo:hover {
            color: var(--dark);
        }
        .nav-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 900;
            font-size: 1.2rem;
        }
        .nav-logo span {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            margin: 0 24px;
        }
        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: width var(--transition);
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a:hover::after {
            width: 100%;
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-links a.active::after {
            width: 100%;
        }
        .nav-cta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-cta .btn {
            white-space: nowrap;
            padding: 8px 20px;
            font-size: 0.9rem;
            border-radius: 50px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--border-light);
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.99);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 2px solid var(--border);
            padding: 20px 24px 28px;
            flex-direction: column;
            gap: 14px;
            z-index: 1040;
            box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu a {
            font-size: 1.1rem;
            font-weight: 500;
            color: var(--text-light);
            padding: 8px 0;
            border-bottom: 1px solid var(--border-light);
            transition: color var(--transition);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
        }
        .mobile-menu a.active {
            font-weight: 600;
        }
        .mobile-menu .btn {
            margin-top: 8px;
            text-align: center;
            border-radius: 50px;
            padding: 10px 24px;
        }

        @media (max-width: 820px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .main-nav .container {
                gap: 12px;
            }
        }
        @media (min-width: 821px) {
            .mobile-menu {
                display: none !important;
            }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border: 2px solid transparent;
            border-radius: 50px;
            padding: 12px 28px;
            font-size: 1rem;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 3px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: var(--shadow-btn);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(217, 56, 62, 0.45);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-btn);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(217, 56, 62, 0.2);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-white {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
        }
        .btn-white:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(217, 56, 62, 0.3);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.1rem;
        }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 50px;
            background: var(--primary-light);
            color: var(--primary);
            letter-spacing: 0.3px;
        }
        .badge-secondary {
            background: var(--secondary-light);
            color: var(--secondary);
        }
        .badge-accent {
            background: #FEF3C7;
            color: #B45309;
        }
        .badge-dark {
            background: var(--dark);
            color: #fff;
        }
        .tag {
            display: inline-block;
            padding: 2px 12px;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: 50px;
            background: var(--bg);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .tag:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary-light);
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }
        .card-text {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 16px;
            flex: 1;
            line-height: 1.6;
        }
        .card-footer {
            padding: 0 20px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: auto;
        }
        .card-link {
            font-weight: 600;
            color: var(--primary);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .card-link:hover {
            gap: 10px;
            color: var(--primary-dark);
        }

        /* ===== 统计数字 ===== */
        .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-light);
            font-weight: 500;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
            position: relative;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-sub {
            color: #fff;
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.75);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--dark);
            letter-spacing: -0.5px;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .badge {
            margin-bottom: 12px;
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .section-sub {
                font-size: 1rem;
                margin-bottom: 32px;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background: linear-gradient(135deg, var(--dark) 0%, var(--dark-soft) 100%);
            color: #fff;
            overflow: hidden;
            padding: 80px 0 60px;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.3;
            z-index: 0;
        }
        .hero-bg-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26, 26, 46, 0.88) 0%, rgba(45, 45, 68, 0.72) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 20px;
        }
        .hero-breadcrumb a {
            color: rgba(255, 255, 255, 0.75);
            transition: color var(--transition);
        }
        .hero-breadcrumb a:hover {
            color: #fff;
        }
        .hero-breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 900;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -1px;
            line-height: 1.15;
        }
        .hero-title .highlight {
            color: var(--secondary);
        }
        .hero-desc {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 580px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 320px;
                padding: 60px 0 48px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn {
                width: 100%;
                text-align: center;
            }
        }

        /* ===== 产品分类卡片网格 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-alt);
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            cursor: pointer;
            text-decoration: none;
            color: inherit;
            display: block;
            height: 100%;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border);
            color: inherit;
        }
        .category-card-img {
            width: 100%;
            aspect-ratio: 16/11;
            object-fit: cover;
            display: block;
        }
        .category-card-body {
            padding: 20px 20px 24px;
        }
        .category-card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--dark);
        }
        .category-card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .category-card .badge {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
        }
        @media (max-width: 992px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 600px) {
            .category-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            margin: 0 auto 16px;
            transition: transform var(--transition);
        }
        .step-item:hover::before {
            transform: scale(1.1);
        }
        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        @media (max-width: 992px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .step-item {
                padding: 24px 16px;
            }
        }

        /* ===== 特色图标列表 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 1.6rem;
            margin-bottom: 16px;
            transition: all var(--transition);
        }
        .feature-item:hover .feature-icon {
            background: var(--primary);
            color: #fff;
            transform: scale(1.08);
        }
        .feature-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }
        .feature-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        @media (max-width: 992px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .feature-item {
                padding: 24px 16px;
            }
        }

        /* ===== 热门产品卡片 ===== */
        .product-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .product-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .product-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border);
        }
        .product-card-img {
            width: 100%;
            aspect-ratio: 16/12;
            object-fit: cover;
            display: block;
        }
        .product-card-body {
            padding: 20px 20px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .product-card-body .badge {
            align-self: flex-start;
            margin-bottom: 10px;
        }
        .product-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--dark);
        }
        .product-card-body p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 12px;
            flex: 1;
        }
        .product-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .product-price {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--primary);
        }
        .product-price small {
            font-size: 0.8rem;
            font-weight: 400;
            color: var(--text-light);
        }
        @media (max-width: 992px) {
            .product-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 600px) {
            .product-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-alt);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            transition: color var(--transition);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 1.1rem;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        @media (max-width: 600px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.9rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 72px 0;
            text-align: center;
            color: #fff;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn {
            border-radius: 50px;
            padding: 14px 40px;
            font-size: 1.05rem;
        }
        .cta-section .btn-white:hover {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 52px 0;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section p {
                font-size: 1rem;
            }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
        }
        .footer .nav-logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer .nav-logo span {
            color: var(--secondary);
        }
        .footer .nav-logo .logo-icon {
            background: var(--primary);
        }
        .footer p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            display: flex;
            flex-direction: column;
        }
        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover {
            color: var(--secondary);
        }
        .footer-col ul li a i {
            width: 18px;
            color: var(--secondary);
        }
        .social-links {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.2rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .social-links a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            max-width: none;
            margin: 0;
        }
        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: span 2;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 600px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: span 1;
            }
            .footer {
                padding: 40px 0 0;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mt-4 {
            margin-top: 32px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }
        .mb-4 {
            margin-bottom: 32px;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }