* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }
        
        /* 头部和导航样式 */
        header {
            background-color: #1a365d;
            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;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            text-decoration: none;
        }
        
        .logo span {
            color: #4dabf7;
        }
        
        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: #4dabf7;
        }
        
        nav ul li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #4dabf7;
            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;
        }
        
        /* 主横幅样式 */
        .hero {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1556742049-0cfed4f6a45d?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80') no-repeat center center/cover;
            color: white;
            padding: 6rem 0;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
        }
        
        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 2rem;
        }
        
        .cta-button {
            display: inline-block;
            background-color: #4dabf7;
            color: white;
            padding: 0.8rem 2rem;
            text-decoration: none;
            border-radius: 4px;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        
        .cta-button:hover {
            background-color: #339af0;
        }
        
        /* 内容区域样式 */
        section {
            padding: 4rem 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            color: #1a365d;
            font-size: 2.2rem;
        }
        
        .section-title::after {
            content: '';
            display: block;
            width: 80px;
            height: 4px;
            background-color: #4dabf7;
            margin: 0.8rem auto;
            border-radius: 2px;
        }
        
        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        
        .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;
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        
        .card h3 {
            color: #1a365d;
            margin-bottom: 1rem;
            font-size: 1.5rem;
        }
        
        .card-icon {
            font-size: 2.5rem;
            color: #4dabf7;
            margin-bottom: 1rem;
        }
        
        /* 公司动态样式 */
        .news-article {
            margin-bottom: 2rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid #eaeaea;
        }
        
        .news-article:last-child {
            border-bottom: none;
        }
        
        .news-date {
            color: #6c757d;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }
        
        /* 业务展示样式 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }
        
        .service-item {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .service-icon {
            font-size: 2.5rem;
            color: #4dabf7;
            margin-bottom: 1rem;
        }
        
        /* 联系表单样式 */
        .contact-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 3rem;
        }
        
        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        
        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
        }
        
        .contact-icon {
            font-size: 1.5rem;
            color: #4dabf7;
        }
        
        .contact-form input,
        .contact-form textarea {
            width: 100%;
            padding: 0.8rem;
            margin-bottom: 1.2rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 1rem;
        }
        
        .contact-form textarea {
            height: 150px;
            resize: vertical;
        }
        
        .submit-btn {
            background-color: #1a365d;
            color: white;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        
        .submit-btn:hover {
            background-color: #4dabf7;
        }
        
        /* 底部样式 */
        footer {
            background-color: #1a365d;
            color: white;
            padding: 3rem 0 1.5rem;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        
        .footer-links h3 {
            margin-bottom: 1.2rem;
            font-size: 1.2rem;
        }
        
        .footer-links ul {
            list-style: none;
        }
        
        .footer-links ul li {
            margin-bottom: 0.5rem;
        }
        
        .footer-links ul li a {
            color: #b3c5e5;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links ul li a:hover {
            color: #4dabf7;
        }
        
        .copyright {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #b3c5e5;
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            nav ul {
                margin-top: 1rem;
                flex-direction: column;
                align-items: center;
            }
            
            nav ul li {
                margin: 0.5rem 0;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .mobile-menu-btn {
                display: block;
                position: absolute;
                top: 1rem;
                right: 1rem;
            }
            
            .mobile-nav {
                display: none;
                width: 100%;
            }
            
            .mobile-nav.active {
                display: block;
            }
        }