* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", "微软雅黑", Arial, sans-serif;
        }
        
        body {
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 头部样式 */
        header {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo img {
            height: 50px;
        }
        
        .logo-text {
            margin-left: 10px;
        }
        
        .logo-text h1 {
            font-size: 24px;
            color: #1a56a7;
            margin-bottom: 5px;
        }
        
        .logo-text p {
            font-size: 12px;
            color: #666;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 30px;
        }
        
        nav ul li a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: color 0.3s;
        }
        
        nav ul li a:hover {
            color: #1a56a7;
        }
        
        .mobile-menu {
            display: none;
            font-size: 24px;
            cursor: pointer;
        }
        
        /* 横幅区域 */
        .banner {
            background: linear-gradient(135deg, #0b2b3b 0%, #1a56a7 100%);
            background-size: cover;
            background-position: center;
            height: 500px;
            display: flex;
            align-items: center;
            margin-top: 80px;
            color: #fff;
            text-align: center;
        }
        
        .banner-content {
            width: 100%;
            padding: 0 20px;
        }
        
        .banner h2 {
            font-size: 42px;
            margin-bottom: 20px;
        }
        
        .banner p {
            font-size: 18px;
            max-width: 800px;
            margin: 0 auto 30px;
        }
        
        .btn {
            display: inline-block;
            background-color: #1a56a7;
            color: #fff;
            padding: 12px 30px;
            border-radius: 4px;
            text-decoration: none;
            font-weight: bold;
            transition: background-color 0.3s;
        }
        
        .btn:hover {
            background-color: #13448c;
        }
        
        /* 服务优势 */
        .advantages {
            padding: 80px 0;
            background-color: #f9f9f9;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 36px;
            color: #1a56a7;
            margin-bottom: 15px;
        }
        
        .section-title p {
            font-size: 16px;
            color: #666;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .advantage-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .advantage-item {
            background-color: #fff;
            padding: 30px;
            border-radius: 5px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: transform 0.3s;
        }
        
        .advantage-item:hover {
            transform: translateY(-10px);
        }
        
        .advantage-icon {
            font-size: 50px;
            color: #1a56a7;
            margin-bottom: 20px;
        }
        
        .advantage-item h3 {
            font-size: 22px;
            margin-bottom: 15px;
            color: #333;
        }
        
        /* 关于我们 */
        .about {
            padding: 80px 0;
        }
        
        .about-content {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
        }
        
        .about-text {
            flex: 1;
            min-width: 300px;
            padding-right: 30px;
        }
        
        .about-text h2 {
            font-size: 36px;
            color: #1a56a7;
            margin-bottom: 20px;
        }
        
        .about-text p {
            margin-bottom: 15px;
        }
        
        .about-image {
            flex: 1;
            min-width: 300px;
        }
        
        .about-image img {
            width: 100%;
            border-radius: 5px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        /* 统计数据 */
        .stats {
            background-color: #1a56a7;
            color: #fff;
            padding: 60px 0;
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            text-align: center;
        }
        
        .stat-item h3 {
            font-size: 42px;
            margin-bottom: 10px;
        }
        
        .stat-item p {
            font-size: 18px;
        }
        
        /* 服务项目 */
        .courses {
            padding: 80px 0;
            background-color: #f9f9f9;
        }
        
        .course-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .course-card {
            background-color: #fff;
            border-radius: 5px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .course-image {
          width: 100%;
  height: auto;
        }
        
        .course-image img {
            width: 40%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
            display: block;
    margin: 20px auto;
        }
        
        .course-card:hover .course-image img {
            transform: scale(1.1);
        }
        
        .course-content {
            padding: 20px;
        }
        
        .course-content h3 {
            font-size: 22px;
            margin-bottom: 10px;
            color: #333;
        }
        
        .course-content p {
            color: #666;
            margin-bottom: 15px;
        }
        
        /* 联系我们 */
        .contact {
            padding: 80px 0;
        }
        
        .contact-container {
            display: flex;
            flex-wrap: wrap;
            gap: 30px;
        }
        
        .contact-info {
            flex: 1;
            min-width: 300px;
        }
        
        .contact-info h3 {
            font-size: 24px;
            margin-bottom: 20px;
            color: #1a56a7;
        }
        
        .contact-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 20px;
        }
        
        .contact-icon {
            font-size: 24px;
            color: #1a56a7;
            margin-right: 15px;
        }
        
        .contact-form {
            flex: 1;
            min-width: 300px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: 500;
        }
        
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
        }
        
        .form-group textarea {
            height: 150px;
        }
        
        /* 页脚 */
        footer {
            background-color: #222;
            color: #fff;
            padding: 50px 0 20px;
        }
        
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }
        
        .footer-column h3 {
            font-size: 20px;
            margin-bottom: 20px;
            color: #fff;
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 10px;
        }
        
        .footer-column ul li a {
            color: #bbb;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-column ul li a:hover {
            color: #fff;
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #444;
            color: #bbb;
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .banner h2 {
                font-size: 36px;
            }
            
            .banner p {
                font-size: 16px;
            }
        }
        
        @media (max-width: 768px) {
            .header-container {
                padding: 10px 0;
            }
            
            .logo img {
                height: 40px;
            }
            
            .logo-text h1 {
                font-size: 20px;
            }
            
            nav {
                display: none;
            }
            
            .mobile-menu {
                display: block;
            }
            
            .banner {
                height: 400px;
                margin-top: 60px;
            }
            
            .banner h2 {
                font-size: 30px;
            }
            
            .section-title h2 {
                font-size: 30px;
            }
            
            .about-content {
                flex-direction: column;
            }
            
            .about-text {
                padding-right: 0;
                margin-bottom: 30px;
            }
        }
        
        @media (max-width: 576px) {
            .banner {
                height: 350px;
            }
            
            .banner h2 {
                font-size: 26px;
            }
            
            .btn {
                padding: 10px 20px;
            }
            
            .section-title h2 {
                font-size: 26px;
            }
            
            .advantage-grid,
            .course-grid {
                grid-template-columns: 1fr;
            }
            
            .stat-item h3 {
                font-size: 36px;
            }
            
            .stat-item p {
                font-size: 16px;
            }
        }
/* ===== 移动端导航优化 ===== */
@media (max-width: 768px) {
    /* 头部容器调整 */
    .header-container {
        padding: 10px 15px;
        position: relative;
    }
    
    /* Logo区域缩小 */
    .logo-text h1 {
        font-size: 18px;
    }
    
    .logo-text p {
        font-size: 10px;
    }
    
    /* 导航菜单默认隐藏 */
    nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #fff;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        z-index: 999;
    }
    
    /* 导航展开状态 */
    nav.active {
        display: block;
    }
    
    /* 导航列表垂直排列 */
    nav ul {
        flex-direction: column;
        padding: 10px 0;
    }
    
    nav ul li {
        margin: 0;
        width: 100%;
        text-align: center;
    }
    
    nav ul li a {
        display: block;
        padding: 12px 20px;
        border-bottom: 1px solid #f0f0f0;
        font-size: 16px;
    }
    
    nav ul li:last-child a {
        border-bottom: none;
    }
    
    nav ul li a:hover {
        background-color: #f5f5f5;
        color: #1a56a7;
    }
    
    /* 移动端菜单按钮 */
    .mobile-menu {
        display: block;
        font-size: 24px;
        color: #333;
        cursor: pointer;
        padding: 5px 10px;
    }
    
    .mobile-menu:hover {
        color: #1a56a7;
    }
}