:root {
            --primary: #1A365D;      /* 烟草深蓝 */
            --primary-light: #2A4A7A;
            --secondary: #ECC94B;    /* 烤烟蛋黄 */
            --secondary-light: #F5D95E;
            --bg-white: #FAF8F5;     /* 象牙白 */
            --bg-card: #FFFFFF;
            --text-dark: #1E2A3A;
            --text-muted: #5A6B7A;
            --border-light: #E8E3DA;
            --shadow: 0 8px 30px rgba(26, 54, 93, 0.08);
            --font: 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: var(--font);
            background: var(--bg-white);
            color: var(--text-dark);
            line-height: 1.7;
        }
        a { text-decoration: none; color: inherit; }
        ul { list-style: none; }
        img { max-width: 100%; display: block; }
        .container-a962c4 {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        /* ----- 通用按钮 ----- */
        .btn-74c61d {
            display: inline-block;
            padding: 14px 40px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.5px;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
        }
        .btn-primary-fa25cf {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 54, 93, 0.3);
        }
        .btn-primary-fa25cf:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(26, 54, 93, 0.35);
        }
        .btn-secondary-6cddff {
            background: var(--secondary);
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(236, 201, 75, 0.3);
        }
        .btn-secondary-6cddff:hover {
            background: var(--secondary-light);
            transform: translateY(-3px);
        }
        .btn-outline-516193 {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline-516193:hover {
            background: var(--primary);
            color: #fff;
        }
        
        /* ----- 通用标题 ----- */
        .section-517165 {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .section-alt-1c8ef6 {
            background: #FFFFFF;
        }
        .section-header-53f94c {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title-b64506 {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            position: relative;
            display: inline-block;
            margin-bottom: 12px;
        }
        .section-title-b64506::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--secondary);
            margin: 10px auto 0;
            border-radius: 4px;
        }
        .section-subtitle-e9c322 {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* ----- 导航栏 (深蓝+黄) ----- */
        .header-a964c6 {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--primary);
            box-shadow: 0 2px 20px rgba(26, 54, 93, 0.2);
        }
        .navbar-4306f4 { padding: 0 20px; }
        .nav-container-c2e2b1 {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .nav-logo-683f63 {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 1.6rem;
            font-weight: 700;
            letter-spacing: 1px;
        }
        .nav-logo-icon-cd4380 {
            font-size: 2rem;
            color: var(--secondary);
        }
        .nav-logo-text-e3968e { color: #fff; }
        .nav-menu-3d8485 {
            display: flex;
            gap: 6px;
            align-items: center;
        }
        .nav-item-703181 .nav-link-c1f1d3 {
            color: rgba(255,255,255,0.8);
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.3s;
        }
        .nav-item-703181 .nav-link-c1f1d3:hover,
        .nav-item-703181 .nav-link-c1f1d3.active {
            color: #fff;
            background: rgba(236, 201, 75, 0.2);
        }
        .nav-item-703181 .nav-link-c1f1d3.active::after {
            content: '';
            display: block;
            width: 20px;
            height: 2px;
            background: var(--secondary);
            margin: 2px auto 0;
            border-radius: 2px;
        }
        .nav-toggle-f81d7e {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }
        .nav-toggle-f81d7e .bar-e39b5d {
            width: 28px;
            height: 3px;
            background: #fff;
            border-radius: 4px;
            transition: 0.3s;
        }
        @media (max-width: 992px) {
            .nav-menu-3d8485 {
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: var(--primary);
                flex-direction: column;
                padding: 20px;
                gap: 8px;
                display: none;
                box-shadow: 0 20px 30px rgba(0,0,0,0.15);
            }
            .nav-menu-3d8485.active { display: flex; }
            .nav-toggle-f81d7e { display: flex; }
        }
        
        /* ----- Hero (深蓝底，亮黄点缀) ----- */
        .hero-f0ac03 {
            background: linear-gradient(135deg, var(--primary) 0%, #0F2847 100%);
            color: #fff;
            padding: 90px 0 70px;
            position: relative;
            overflow: hidden;
        }
        .hero-f0ac03::before {
            content: '';
            position: absolute;
            top: -20%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(236, 201, 75, 0.08) 0%, transparent 70%);
            border-radius: 50%;
        }
        .hero-content-f8f774 { position: relative; z-index: 1; }
        .hero-text-1daf80 { max-width: 800px; }
        .hero-title-6b0f20 {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 10px;
        }
        .hero-title-6b0f20 .yellow-8bd29d {
            color: var(--secondary);
            text-shadow: 0 0 30px rgba(236, 201, 75, 0.2);
        }
        .hero-subtitle-7095d3 {
            font-size: 1.3rem;
            color: rgba(255,255,255,0.85);
            font-weight: 300;
            letter-spacing: 2px;
            margin-bottom: 30px;
        }
        .hero-features-113844 {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            margin: 30px 0 35px;
        }
        .hero-feature-bb74ef {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.1rem;
        }
        .hero-feature-bb74ef i {
            font-size: 1.8rem;
            color: var(--secondary);
        }
        .hero-buttons-fe6871 {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .hero-buttons-fe6871 .btn-secondary-6cddff i {
            margin-right: 8px;
        }
        @media (max-width: 768px) {
            .hero-title-6b0f20 { font-size: 2.2rem; }
            .hero-subtitle-7095d3 { font-size: 1rem; }
            .hero-features-113844 { gap: 20px; }
        }
        
        /* ----- 卡片 (白底，黄蓝边框) ----- */
        .card-691d05 {
            background: #fff;
            border-radius: 16px;
            padding: 30px 25px;
            border: 1px solid var(--border-light);
            transition: all 0.3s;
            box-shadow: var(--shadow);
        }
        .card-691d05:hover {
            transform: translateY(-6px);
            border-color: var(--secondary);
            box-shadow: 0 12px 40px rgba(26, 54, 93, 0.08);
        }
        
        /* ----- 关于我们 (前置) ----- */
        .about-content-09ea4a {
            display: flex;
            gap: 50px;
            align-items: center;
            flex-wrap: wrap;
        }
        .about-text-31cad8 { flex: 1; min-width: 300px; }
        .about-text-31cad8 h3 {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .about-text-31cad8 p {
            color: var(--text-muted);
            line-height: 1.9;
            margin-bottom: 25px;
        }
        .about-features-b21e3a {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .about-feature-0d9f24 {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }
        .about-feature-0d9f24 i {
            font-size: 1.6rem;
            color: var(--secondary);
            margin-top: 4px;
        }
        .about-feature-content-03c668 h4 {
            font-size: 1rem;
            color: var(--text-dark);
            margin-bottom: 2px;
        }
        .about-feature-content-03c668 p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
        }
        .about-image-bb8b95 { flex: 1; min-width: 280px; }
        .about-image-bb8b95 img {
            border-radius: 20px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
        }
        .company-values-37f43f {
            margin-top: 50px;
            text-align: center;
        }
        .company-values-37f43f h3 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 35px;
        }
        .values-grid-5c217f {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 25px;
        }
        .value-item-5b8d50 {
            background: #fff;
            padding: 30px 20px;
            border-radius: 16px;
            border: 1px solid var(--border-light);
            transition: 0.3s;
        }
        .value-item-5b8d50:hover {
            border-color: var(--secondary);
            transform: translateY(-4px);
        }
        .value-icon-273ebf {
            font-size: 2.8rem;
            color: var(--secondary);
            margin-bottom: 15px;
        }
        .value-item-5b8d50 h4 {
            color: var(--text-dark);
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .value-item-5b8d50 p {
            color: var(--text-muted);
            font-size: 0.92rem;
        }
        
        /* ----- 核心服务 (黄蓝撞色) ----- */
        .services-grid-b661cf {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 30px;
        }
        .service-card-894641 {
            background: #fff;
            border-radius: 16px;
            padding: 35px 25px;
            border: 1px solid var(--border-light);
            text-align: center;
            transition: 0.4s;
            box-shadow: var(--shadow);
        }
        .service-card-894641:hover {
            border-color: var(--secondary);
            transform: translateY(-8px);
        }
        .service-icon-4c2c37 {
            width: 70px;
            height: 70px;
            margin: 0 auto 20px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--secondary);
        }
        .service-card-894641 h3 {
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .service-card-894641 p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .services-stats-6be7e6 {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 40px;
            background: var(--primary);
            padding: 30px 20px;
            border-radius: 20px;
            color: #fff;
        }
        .services-stats-6be7e6 .stat-item-ba4144 {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .services-stats-6be7e6 .stat-item-ba4144 i {
            font-size: 2.4rem;
            color: var(--secondary);
        }
        .services-stats-6be7e6 .stat-content-b1958f .stat-number-1d419f {
            display: block;
            font-size: 2rem;
            font-weight: 700;
            color: var(--secondary);
        }
        .services-stats-6be7e6 .stat-content-b1958f .stat-label-abc37d {
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        
        /* ----- 优势 (亮黄点缀) ----- */
        .advantages-content-8b607c {
            display: flex;
            gap: 50px;
            align-items: center;
            flex-wrap: wrap;
        }
        .advantages-text-5911f9 { flex: 1; min-width: 300px; }
        .advantage-item-ec63b8 {
            display: flex;
            gap: 20px;
            margin-bottom: 30px;
            align-items: flex-start;
        }
        .advantage-icon-bbdbdb {
            width: 60px;
            height: 60px;
            min-width: 60px;
            background: var(--secondary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            transition: 0.3s;
        }
        .advantage-item-ec63b8:hover .advantage-icon-bbdbdb {
            background: var(--primary);
            color: var(--secondary);
        }
        .advantage-content-40bf19 h3 {
            font-size: 1.2rem;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .advantage-content-40bf19 p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .advantages-image-ecb7c9 { flex: 1; min-width: 280px; }
        .advantages-image-ecb7c9 img {
            border-radius: 20px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
        }
        
        /* ----- 产品 (更多卡片) ----- */
        .product-categories-6b0d84 {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 40px;
        }
        .category-filter-37a333 {
            padding: 8px 26px;
            border-radius: 30px;
            background: #fff;
            border: 2px solid var(--border-light);
            color: var(--text-muted);
            font-weight: 500;
            cursor: pointer;
            transition: 0.3s;
            font-size: 0.95rem;
        }
        .category-filter-37a333:hover,
        .category-filter-37a333.active {
            background: var(--secondary);
            color: var(--primary);
            border-color: var(--secondary);
        }
        .products-grid-72d088 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .product-card-c8574d {
            background: #fff;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: 0.4s;
            box-shadow: var(--shadow);
        }
        .product-card-c8574d:hover {
            transform: translateY(-10px);
            border-color: var(--secondary);
            box-shadow: 0 16px 48px rgba(26, 54, 93, 0.08);
        }
        .product-image-ebf0d6 {
            height: 200px;
            overflow: hidden;
            background: var(--bg-white);
        }
        .product-image-ebf0d6 img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .product-info-c6bd77 { padding: 20px 22px 25px; }
        .product-info-c6bd77 h3 {
            font-size: 1.25rem;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .product-category-tag-bd906b {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }
        .product-desc-ae61cf {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 14px;
        }
        .product-features-819b04 {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .product-features-819b04 span i {
            color: var(--secondary);
            margin-right: 4px;
        }
        
        /* 价格标签 (黄色高亮) */
        .product-price-256308 {
            display: inline-block;
            background: var(--secondary);
            color: var(--primary);
            font-weight: 700;
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            margin-top: 8px;
        }
        
        /* ----- 新闻 ----- */
        .news-grid-de31b9 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .news-card-a15e99 {
            display: flex;
            background: #fff;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: 0.3s;
        }
        .news-card-a15e99:hover {
            border-color: var(--secondary);
            transform: translateY(-5px);
        }
        .news-date-c69e53 {
            min-width: 80px;
            background: var(--primary);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            padding: 15px 10px;
            color: var(--secondary);
        }
        .news-date-c69e53 .date-day-9cafab {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1;
        }
        .news-date-c69e53 .date-month-3cfd79 {
            font-size: 0.85rem;
            opacity: 0.8;
        }
        .news-content-c31c09 { padding: 18px 22px; flex: 1; }
        .news-content-c31c09 h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .news-content-c31c09 h3 a {
            color: var(--text-dark);
            transition: 0.3s;
        }
        .news-content-c31c09 h3 a:hover { color: var(--primary); }
        .news-content-c31c09 p {
            color: var(--text-muted);
            font-size: 0.92rem;
            margin-bottom: 10px;
        }
        .news-meta-6f5280 {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .news-meta-6f5280 i { color: var(--secondary); margin-right: 4px; }
        .news-more-08782e { text-align: center; margin-top: 40px; }
        
        /* ----- FAQ (黄色边框) ----- */
        .faq-container-ab4ad9 { max-width: 800px; margin: 0 auto; }
        .faq-item-477b48 {
            background: #fff;
            border-radius: 12px;
            margin-bottom: 16px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: 0.3s;
        }
        .faq-item-477b48:hover { border-color: var(--secondary); }
        .faq-question-712c42 {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 25px;
            cursor: pointer;
        }
        .faq-question-712c42 h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
        }
        .faq-icon-b2dc62 {
            color: var(--secondary);
            transition: 0.3s;
            font-size: 1.2rem;
        }
        .faq-item-477b48.active .faq-icon-b2dc62 { transform: rotate(180deg); }
        .faq-answer-85a368 {
            padding: 0 25px 20px;
            color: var(--text-muted);
            display: none;
            line-height: 1.8;
        }
        .faq-item-477b48.active .faq-answer-85a368 { display: block; }
        
        /* ----- 口碑 (评论) ----- */
        .testimonials-grid-8429c2 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .testimonial-card-d97709 {
            background: #fff;
            padding: 28px 25px;
            border-radius: 16px;
            border: 1px solid var(--border-light);
            transition: 0.3s;
        }
        .testimonial-card-d97709:hover {
            border-color: var(--secondary);
            transform: translateY(-6px);
        }
        .testimonial-header-692775 {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 12px;
        }
        .testimonial-info-c122db h4 {
            font-size: 1.1rem;
            color: var(--primary);
        }
        .testimonial-rating-7b24be {
            color: var(--secondary);
            font-size: 0.9rem;
            letter-spacing: 2px;
        }
        .testimonial-content-108c44 p {
            color: var(--text-muted);
            font-style: italic;
            line-height: 1.7;
        }
        .testimonials-stats-fb8891 {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 50px;
            padding: 30px 20px;
            background: var(--primary);
            border-radius: 20px;
            color: #fff;
        }
        .testimonials-stats-fb8891 .stat-item-ba4144 {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .testimonials-stats-fb8891 .stat-icon-dfd04d {
            font-size: 2.2rem;
            color: var(--secondary);
        }
        .testimonials-stats-fb8891 .stat-content-b1958f .stat-number-1d419f {
            display: block;
            font-size: 2rem;
            font-weight: 700;
            color: var(--secondary);
        }
        .testimonials-stats-fb8891 .stat-content-b1958f .stat-label-abc37d {
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        
        /* ----- 友情链接 (暖白) ----- */
        .flink-section-a4ddf0 {
            padding: 30px 0;
            background: var(--bg-white);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .flink-header-22d014 {
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .flink-section-a4ddf0 ul {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        .flink-section-a4ddf0 ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: 0.3s;
        }
        .flink-section-a4ddf0 ul li a:hover {
            color: var(--primary);
        }
        
        /* ----- 页脚 (深蓝+黄) ----- */
        .footer-92e795 {
            background: var(--primary);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 30px;
        }
        .footer-content-ba079b {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo-1095f2 {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 15px;
        }
        .footer-logo-1095f2 i { color: var(--secondary); }
        .footer-desc-f3c75a {
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
            opacity: 0.8;
        }
        .footer-social-6dcbde {
            display: flex;
            gap: 16px;
        }
        .social-link-2f37cb {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            color: #fff;
            font-size: 1.2rem;
            transition: 0.3s;
        }
        .social-link-2f37cb:hover {
            background: var(--secondary);
            color: var(--primary);
            transform: translateY(-3px);
        }
        .footer-section-054b62 h3 {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 18px;
            position: relative;
        }
        .footer-section-054b62 h3::after {
            content: '';
            display: block;
            width: 30px;
            height: 3px;
            background: var(--secondary);
            margin-top: 8px;
        }
        .footer-links-87f7e1 li { margin-bottom: 10px; }
        .footer-links-87f7e1 li a {
            color: rgba(255,255,255,0.75);
            transition: 0.3s;
            font-size: 0.95rem;
        }
        .footer-links-87f7e1 li a:hover {
            color: var(--secondary);
            padding-left: 6px;
        }
        .contact-item-45e88e {
            display: flex;
            gap: 12px;
            margin-bottom: 14px;
            align-items: flex-start;
        }
        .contact-item-45e88e i {
            font-size: 1.2rem;
            color: var(--secondary);
            margin-top: 3px;
            min-width: 20px;
        }
        .contact-content-e033a9 {
            display: flex;
            flex-direction: column;
            font-size: 0.9rem;
        }
        .contact-content-e033a9 span:first-child {
            opacity: 0.6;
            font-size: 0.8rem;
        }
        .contact-content-e033a9 a {
            color: #fff;
        }
        .contact-content-e033a9 a:hover { color: var(--secondary); }
        .footer-bottom-78fc3a {
            border-top: 1px solid rgba(255,255,255,0.15);
            padding-top: 25px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.9rem;
        }
        .footer-bottom-78fc3a a {
            color: rgba(255,255,255,0.7);
            margin-left: 20px;
            transition: 0.3s;
        }
        .footer-bottom-78fc3a a:hover { color: var(--secondary); }
        .footer-copyright-5f115e p { opacity: 0.8; }
        
        /* ----- 回到顶部 (黄色) ----- */
        .back-to-top-ecd867 {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--secondary);
            color: var(--primary);
            border: none;
            border-radius: 50%;
            font-size: 1.4rem;
            box-shadow: 0 4px 20px rgba(236, 201, 75, 0.4);
            cursor: pointer;
            transition: 0.3s;
            display: none;
            z-index: 999;
        }
        .back-to-top-ecd867:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(236, 201, 75, 0.5);
        }
        
        /* 响应式 */
        @media (max-width: 768px) {
            .section-517165 { padding: 50px 0; }
            .section-title-b64506 { font-size: 2rem; }
            .hero-title-6b0f20 { font-size: 2rem; }
            .about-features-b21e3a { grid-template-columns: 1fr; }
            .footer-content-ba079b { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 480px) {
            .footer-content-ba079b { grid-template-columns: 1fr; }
            .footer-bottom-78fc3a { flex-direction: column; align-items: center; }
            .footer-bottom-78fc3a a { margin: 0 10px; }
        }