* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }
        
        /* 导航样式 */
        header {
            background-color: #1a3c8b;
            color: white;
            padding: 1rem 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        .container {
            width: 90%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            color: white;
            text-decoration: none;
        }
        
        .logo span {
            color: #4dc0ff;
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 2rem;
        }
        
        nav ul li a {
            color: white;
            text-decoration: none;
            font-weight: 500;
            padding: 0.5rem 0;
            transition: color 0.3s;
            position: relative;
        }
        
        nav ul li a:hover {
            color: #4dc0ff;
        }
        
        nav ul li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #4dc0ff;
            transition: width 0.3s;
        }
        
        nav ul li a:hover::after {
            width: 100%;
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
        }
        
        /* 主体内容样式 */
        .hero {
            background: linear-gradient(135deg, #1a3c8b 0%, #2a5caa 100%);
            color: white;
            padding: 5rem 0;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            line-height: 1.2;
        }
        
        .hero p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 2rem;
            opacity: 0.9;
        }
        
        .btn {
            display: inline-block;
            background-color: #4dc0ff;
            color: white;
            padding: 0.8rem 2rem;
            border-radius: 4px;
            text-decoration: none;
            font-weight: 600;
            transition: background-color 0.3s;
            border: none;
            cursor: pointer;
        }
        
        .btn:hover {
            background-color: #2aa8e8;
        }
        
        section {
            padding: 4rem 0;
        }
        
        section:nth-child(even) {
            background-color: #f0f5ff;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            font-size: 2.2rem;
            color: #1a3c8b;
            position: relative;
        }
        
        .section-title::after {
            content: '';
            display: block;
            width: 80px;
            height: 3px;
            background-color: #4dc0ff;
            margin: 0.5rem auto;
        }
        
        /* 关于我们 */
        .about-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 3rem;
        }
        
        .about-text {
            flex: 1;
            min-width: 300px;
        }
        
        .about-img {
            flex: 1;
            min-width: 300px;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .about-img img {
            width: 100%;
            height: auto;
            display: block;
        }
        
        /* 业务板块 */
        .services {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }
        
        .service-card {
            background-color: white;
            border-radius: 8px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        
        .service-icon {
            font-size: 2.5rem;
            color: #1a3c8b;
            margin-bottom: 1.5rem;
        }
        
        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
            color: #1a3c8b;
        }
        
        /* 公司动态 */
        .news-list {
            display: grid;
            gap: 1.5rem;
        }
        
        .news-item {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            box-shadow: 0 3px 10px rgba(0,0,0,0.05);
            border-left: 4px solid #4dc0ff;
        }
        
        .news-date {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }
        
        .news-title {
            font-size: 1.2rem;
            margin-bottom: 0.8rem;
            color: #1a3c8b;
        }
        
        /* 联系我们 */
        .contact-content {
            display: flex;
            flex-wrap: wrap;
            gap: 3rem;
        }
        
        .contact-info {
            flex: 1;
            min-width: 300px;
        }
        
        .contact-form {
            flex: 1;
            min-width: 300px;
            background-color: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .form-group {
            margin-bottom: 1.5rem;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
        }
        
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: inherit;
        }
        
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 1.5rem;
        }
        
        .contact-icon {
            font-size: 1.5rem;
            color: #1a3c8b;
            margin-right: 1rem;
            flex-shrink: 0;
        }
        
        /* 友情链接 */
        footer {
            background-color: #1a3c8b;
            color: white;
            padding: 3rem 0 1.5rem;
        }
        
        .footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            margin-bottom: 2rem;
        }
        
        .footer-section {
            flex: 1;
            min-width: 250px;
            margin-bottom: 2rem;
        }
        
        .footer-title {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            color: #4dc0ff;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: #4dc0ff;
        }
        
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #aaa;
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: block;
            }
            
            nav ul {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: #1a3c8b;
                flex-direction: column;
                padding: 1rem 0;
                box-shadow: 0 5px 10px rgba(0,0,0,0.1);
            }
            
            nav ul.active {
                display: flex;
            }
            
            nav ul li {
                margin: 0;
                text-align: center;
            }
            
            nav ul li a {
                display: block;
                padding: 0.8rem 1rem;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            section {
                padding: 3rem 0;
            }
        }