: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-f93f45 {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        /* ----- 通用按钮 ----- */
        .btn-e8b7eb {
            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-f6cb34 {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(26, 54, 93, 0.3);
        }
        .btn-primary-f6cb34:hover {
            background: var(--primary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(26, 54, 93, 0.35);
        }
        .btn-secondary-fe4572 {
            background: var(--secondary);
            color: var(--primary);
            box-shadow: 0 4px 16px rgba(236, 201, 75, 0.3);
        }
        .btn-secondary-fe4572:hover {
            background: var(--secondary-light);
            transform: translateY(-3px);
        }
        .btn-outline-83ea4c {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline-83ea4c:hover {
            background: var(--primary);
            color: #fff;
        }
        
        /* ----- 通用标题 ----- */
        .section-18e62b {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .section-alt-1a0df2 {
            background: #FFFFFF;
        }
        .section-header-f0e328 {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title-81432e {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            position: relative;
            display: inline-block;
            margin-bottom: 12px;
        }
        .section-title-81432e::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--secondary);
            margin: 10px auto 0;
            border-radius: 4px;
        }
        .section-subtitle-2416d5 {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* ----- 导航栏 (深蓝+黄) ----- */
        .header-e76426 {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--primary);
            box-shadow: 0 2px 20px rgba(26, 54, 93, 0.2);
        }
        .navbar-3dd842 { padding: 0 20px; }
        .nav-container-e0d99a {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .nav-logo-01153e {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 1.6rem;
            font-weight: 700;
            letter-spacing: 1px;
        }
        .nav-logo-icon-ab792c {
            font-size: 2rem;
            color: var(--secondary);
        }
        .nav-logo-text-bdbfbe { color: #fff; }
        .nav-menu-973c25 {
            display: flex;
            gap: 6px;
            align-items: center;
        }
        .nav-item-f9084e .nav-link-a048f3 {
            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-f9084e .nav-link-a048f3:hover,
        .nav-item-f9084e .nav-link-a048f3.active {
            color: #fff;
            background: rgba(236, 201, 75, 0.2);
        }
        .nav-item-f9084e .nav-link-a048f3.active::after {
            content: '';
            display: block;
            width: 20px;
            height: 2px;
            background: var(--secondary);
            margin: 2px auto 0;
            border-radius: 2px;
        }
        .nav-toggle-44b27d {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
        }
        .nav-toggle-44b27d .bar-9514a0 {
            width: 28px;
            height: 3px;
            background: #fff;
            border-radius: 4px;
            transition: 0.3s;
        }
        @media (max-width: 992px) {
            .nav-menu-973c25 {
                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-973c25.active { display: flex; }
            .nav-toggle-44b27d { display: flex; }
        }
        
        /* ----- Hero (深蓝底，亮黄点缀) ----- */
        .hero-c525ac {
            background: linear-gradient(135deg, var(--primary) 0%, #0F2847 100%);
            color: #fff;
            padding: 90px 0 70px;
            position: relative;
            overflow: hidden;
        }
        .hero-c525ac::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-771666 { position: relative; z-index: 1; }
        .hero-text-874047 { max-width: 800px; }
        .hero-title-66589a {
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 10px;
        }
        .hero-title-66589a .yellow-f84701 {
            color: var(--secondary);
            text-shadow: 0 0 30px rgba(236, 201, 75, 0.2);
        }
        .hero-subtitle-4e711f {
            font-size: 1.3rem;
            color: rgba(255,255,255,0.85);
            font-weight: 300;
            letter-spacing: 2px;
            margin-bottom: 30px;
        }
        .hero-features-ba015b {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
            margin: 30px 0 35px;
        }
        .hero-feature-2a42ae {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.1rem;
        }
        .hero-feature-2a42ae i {
            font-size: 1.8rem;
            color: var(--secondary);
        }
        .hero-buttons-b1e129 {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .hero-buttons-b1e129 .btn-secondary-fe4572 i {
            margin-right: 8px;
        }
        @media (max-width: 768px) {
            .hero-title-66589a { font-size: 2.2rem; }
            .hero-subtitle-4e711f { font-size: 1rem; }
            .hero-features-ba015b { gap: 20px; }
        }
        
        /* ----- 卡片 (白底，黄蓝边框) ----- */
        .card-551e10 {
            background: #fff;
            border-radius: 16px;
            padding: 30px 25px;
            border: 1px solid var(--border-light);
            transition: all 0.3s;
            box-shadow: var(--shadow);
        }
        .card-551e10: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-d72325 {
            display: flex;
            gap: 50px;
            align-items: center;
            flex-wrap: wrap;
        }
        .about-text-3128fb { flex: 1; min-width: 300px; }
        .about-text-3128fb h3 {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .about-text-3128fb p {
            color: var(--text-muted);
            line-height: 1.9;
            margin-bottom: 25px;
        }
        .about-features-77b248 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .about-feature-98826d {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }
        .about-feature-98826d i {
            font-size: 1.6rem;
            color: var(--secondary);
            margin-top: 4px;
        }
        .about-feature-content-3f8a5a h4 {
            font-size: 1rem;
            color: var(--text-dark);
            margin-bottom: 2px;
        }
        .about-feature-content-3f8a5a p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
        }
        .about-image-65ef0d { flex: 1; min-width: 280px; }
        .about-image-65ef0d img {
            border-radius: 20px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
        }
        .company-values-00b98c {
            margin-top: 50px;
            text-align: center;
        }
        .company-values-00b98c h3 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 35px;
        }
        .values-grid-867f1f {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 25px;
        }
        .value-item-074573 {
            background: #fff;
            padding: 30px 20px;
            border-radius: 16px;
            border: 1px solid var(--border-light);
            transition: 0.3s;
        }
        .value-item-074573:hover {
            border-color: var(--secondary);
            transform: translateY(-4px);
        }
        .value-icon-1974ed {
            font-size: 2.8rem;
            color: var(--secondary);
            margin-bottom: 15px;
        }
        .value-item-074573 h4 {
            color: var(--text-dark);
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .value-item-074573 p {
            color: var(--text-muted);
            font-size: 0.92rem;
        }
        
        /* ----- 核心服务 (黄蓝撞色) ----- */
        .services-grid-c4834b {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 30px;
        }
        .service-card-fdf1cb {
            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-fdf1cb:hover {
            border-color: var(--secondary);
            transform: translateY(-8px);
        }
        .service-icon-66ce7a {
            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-fdf1cb h3 {
            font-size: 1.3rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .service-card-fdf1cb p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .services-stats-ce34fd {
            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-ce34fd .stat-item-51cb03 {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .services-stats-ce34fd .stat-item-51cb03 i {
            font-size: 2.4rem;
            color: var(--secondary);
        }
        .services-stats-ce34fd .stat-content-eafd4a .stat-number-fcc9b7 {
            display: block;
            font-size: 2rem;
            font-weight: 700;
            color: var(--secondary);
        }
        .services-stats-ce34fd .stat-content-eafd4a .stat-label-f63421 {
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        
        /* ----- 优势 (亮黄点缀) ----- */
        .advantages-content-cdc803 {
            display: flex;
            gap: 50px;
            align-items: center;
            flex-wrap: wrap;
        }
        .advantages-text-3f9ae6 { flex: 1; min-width: 300px; }
        .advantage-item-e81060 {
            display: flex;
            gap: 20px;
            margin-bottom: 30px;
            align-items: flex-start;
        }
        .advantage-icon-bb45f4 {
            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-e81060:hover .advantage-icon-bb45f4 {
            background: var(--primary);
            color: var(--secondary);
        }
        .advantage-content-7cbe31 h3 {
            font-size: 1.2rem;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .advantage-content-7cbe31 p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .advantages-image-b895d4 { flex: 1; min-width: 280px; }
        .advantages-image-b895d4 img {
            border-radius: 20px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow);
        }
        
        /* ----- 产品 (更多卡片) ----- */
        .product-categories-d01222 {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 40px;
        }
        .category-filter-cf2518 {
            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-cf2518:hover,
        .category-filter-cf2518.active {
            background: var(--secondary);
            color: var(--primary);
            border-color: var(--secondary);
        }
        .products-grid-7c7d2a {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .product-card-47bdbe {
            background: #fff;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: 0.4s;
            box-shadow: var(--shadow);
        }
        .product-card-47bdbe:hover {
            transform: translateY(-10px);
            border-color: var(--secondary);
            box-shadow: 0 16px 48px rgba(26, 54, 93, 0.08);
        }
        .product-image-c5be13 {
            height: 200px;
            overflow: hidden;
            background: var(--bg-white);
        }
        .product-image-c5be13 img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .product-info-581380 { padding: 20px 22px 25px; }
        .product-info-581380 h3 {
            font-size: 1.25rem;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .product-category-tag-8e2754 {
            font-size: 0.8rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
        }
        .product-desc-801ad5 {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 14px;
        }
        .product-features-2dc22c {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .product-features-2dc22c span i {
            color: var(--secondary);
            margin-right: 4px;
        }
        
        /* 价格标签 (黄色高亮) */
        .product-price-c98c7a {
            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-b609ca {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .news-card-1de18d {
            display: flex;
            background: #fff;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: 0.3s;
        }
        .news-card-1de18d:hover {
            border-color: var(--secondary);
            transform: translateY(-5px);
        }
        .news-date-e7bfd4 {
            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-e7bfd4 .date-day-c4e865 {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1;
        }
        .news-date-e7bfd4 .date-month-a76bb5 {
            font-size: 0.85rem;
            opacity: 0.8;
        }
        .news-content-5a97eb { padding: 18px 22px; flex: 1; }
        .news-content-5a97eb h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .news-content-5a97eb h3 a {
            color: var(--text-dark);
            transition: 0.3s;
        }
        .news-content-5a97eb h3 a:hover { color: var(--primary); }
        .news-content-5a97eb p {
            color: var(--text-muted);
            font-size: 0.92rem;
            margin-bottom: 10px;
        }
        .news-meta-b5bd17 {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .news-meta-b5bd17 i { color: var(--secondary); margin-right: 4px; }
        .news-more-dcd687 { text-align: center; margin-top: 40px; }
        
        /* ----- FAQ (黄色边框) ----- */
        .faq-container-f47e43 { max-width: 800px; margin: 0 auto; }
        .faq-item-e8909b {
            background: #fff;
            border-radius: 12px;
            margin-bottom: 16px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: 0.3s;
        }
        .faq-item-e8909b:hover { border-color: var(--secondary); }
        .faq-question-1b0261 {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 25px;
            cursor: pointer;
        }
        .faq-question-1b0261 h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
        }
        .faq-icon-6d9d3e {
            color: var(--secondary);
            transition: 0.3s;
            font-size: 1.2rem;
        }
        .faq-item-e8909b.active .faq-icon-6d9d3e { transform: rotate(180deg); }
        .faq-answer-d8c1eb {
            padding: 0 25px 20px;
            color: var(--text-muted);
            display: none;
            line-height: 1.8;
        }
        .faq-item-e8909b.active .faq-answer-d8c1eb { display: block; }
        
        /* ----- 口碑 (评论) ----- */
        .testimonials-grid-3b3d83 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .testimonial-card-ad14b5 {
            background: #fff;
            padding: 28px 25px;
            border-radius: 16px;
            border: 1px solid var(--border-light);
            transition: 0.3s;
        }
        .testimonial-card-ad14b5:hover {
            border-color: var(--secondary);
            transform: translateY(-6px);
        }
        .testimonial-header-281196 {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 12px;
        }
        .testimonial-info-7ebd95 h4 {
            font-size: 1.1rem;
            color: var(--primary);
        }
        .testimonial-rating-4f12d3 {
            color: var(--secondary);
            font-size: 0.9rem;
            letter-spacing: 2px;
        }
        .testimonial-content-e18c1d p {
            color: var(--text-muted);
            font-style: italic;
            line-height: 1.7;
        }
        .testimonials-stats-4ab76a {
            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-4ab76a .stat-item-51cb03 {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .testimonials-stats-4ab76a .stat-icon-5fc447 {
            font-size: 2.2rem;
            color: var(--secondary);
        }
        .testimonials-stats-4ab76a .stat-content-eafd4a .stat-number-fcc9b7 {
            display: block;
            font-size: 2rem;
            font-weight: 700;
            color: var(--secondary);
        }
        .testimonials-stats-4ab76a .stat-content-eafd4a .stat-label-f63421 {
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        
        /* ----- 友情链接 (暖白) ----- */
        .flink-section-9ff886 {
            padding: 30px 0;
            background: var(--bg-white);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
        }
        .flink-header-613746 {
            font-weight: 600;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .flink-section-9ff886 ul {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }
        .flink-section-9ff886 ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: 0.3s;
        }
        .flink-section-9ff886 ul li a:hover {
            color: var(--primary);
        }
        
        /* ----- 页脚 (深蓝+黄) ----- */
        .footer-7db738 {
            background: var(--primary);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 30px;
        }
        .footer-content-263ba7 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo-c26138 {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 15px;
        }
        .footer-logo-c26138 i { color: var(--secondary); }
        .footer-desc-155f39 {
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
            opacity: 0.8;
        }
        .footer-social-48769a {
            display: flex;
            gap: 16px;
        }
        .social-link-c1d3bd {
            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-c1d3bd:hover {
            background: var(--secondary);
            color: var(--primary);
            transform: translateY(-3px);
        }
        .footer-section-1daa90 h3 {
            color: #fff;
            font-size: 1.2rem;
            margin-bottom: 18px;
            position: relative;
        }
        .footer-section-1daa90 h3::after {
            content: '';
            display: block;
            width: 30px;
            height: 3px;
            background: var(--secondary);
            margin-top: 8px;
        }
        .footer-links-3347d5 li { margin-bottom: 10px; }
        .footer-links-3347d5 li a {
            color: rgba(255,255,255,0.75);
            transition: 0.3s;
            font-size: 0.95rem;
        }
        .footer-links-3347d5 li a:hover {
            color: var(--secondary);
            padding-left: 6px;
        }
        .contact-item-b02420 {
            display: flex;
            gap: 12px;
            margin-bottom: 14px;
            align-items: flex-start;
        }
        .contact-item-b02420 i {
            font-size: 1.2rem;
            color: var(--secondary);
            margin-top: 3px;
            min-width: 20px;
        }
        .contact-content-ad5192 {
            display: flex;
            flex-direction: column;
            font-size: 0.9rem;
        }
        .contact-content-ad5192 span:first-child {
            opacity: 0.6;
            font-size: 0.8rem;
        }
        .contact-content-ad5192 a {
            color: #fff;
        }
        .contact-content-ad5192 a:hover { color: var(--secondary); }
        .footer-bottom-7f7f99 {
            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-7f7f99 a {
            color: rgba(255,255,255,0.7);
            margin-left: 20px;
            transition: 0.3s;
        }
        .footer-bottom-7f7f99 a:hover { color: var(--secondary); }
        .footer-copyright-e3ff28 p { opacity: 0.8; }
        
        /* ----- 回到顶部 (黄色) ----- */
        .back-to-top-acad99 {
            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-acad99:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 30px rgba(236, 201, 75, 0.5);
        }
        
        /* 响应式 */
        @media (max-width: 768px) {
            .section-18e62b { padding: 50px 0; }
            .section-title-81432e { font-size: 2rem; }
            .hero-title-66589a { font-size: 2rem; }
            .about-features-77b248 { grid-template-columns: 1fr; }
            .footer-content-263ba7 { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 480px) {
            .footer-content-263ba7 { grid-template-columns: 1fr; }
            .footer-bottom-7f7f99 { flex-direction: column; align-items: center; }
            .footer-bottom-7f7f99 a { margin: 0 10px; }
        }