* {
            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: #f9f9f9;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }
        
        ul {
            list-style: none;
        }
        
        img {
            max-width: 100%;
            height: auto;
        }
        
        .section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            position: relative;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: #1a3a6c;
            margin-bottom: 15px;
        }
        
        .section-title p {
            color: #666;
            max-width: 700px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        
        .btn {
            display: inline-block;
            background-color: #1a3a6c;
            color: white;
            padding: 12px 30px;
            border-radius: 5px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        
        .btn:hover {
            background-color: #0d2b57;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        
        /* 头部与导航 */
        header {
            background-color: white;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo h1 {
            font-size: 1.8rem;
            color: #1a3a6c;
            font-weight: 700;
        }
        
        .logo span {
            color: #e63946;
        }
        
        .nav-menu {
            display: flex;
        }
        
        .nav-menu li {
            margin-left: 35px;
        }
        
        .nav-menu a {
            font-weight: 600;
            color: #333;
            position: relative;
            padding: 5px 0;
        }
        
        .nav-menu a:hover {
            color: #1a3a6c;
        }
        
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #1a3a6c;
            transition: width 0.3s ease;
        }
        
        .nav-menu a:hover::after {
            width: 100%;
        }
        
        .mobile-menu-btn {
            display: none;
            font-size: 1.5rem;
            color: #1a3a6c;
            cursor: pointer;
        }
        
        /* 首页横幅 */
        #home {
            background: linear-gradient(rgba(26, 58, 108, 0.85), rgba(26, 58, 108, 0.9)), url('https://images.unsplash.com/photo-1554224155-6726b3ff858f?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=800&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 180px 0 120px;
            text-align: center;
        }
        
        .hero-content h1 {
            font-size: 3.2rem;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        .hero-content p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 40px;
            opacity: 0.9;
        }
        
        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        
        .hero-btns .btn {
            background-color: #e63946;
        }
        
        .hero-btns .btn-outline {
            background-color: transparent;
            border: 2px solid white;
        }
        
        .hero-btns .btn-outline:hover {
            background-color: white;
            color: #1a3a6c;
        }
        
        /* 关于我们 */
        .about-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .about-img {
            flex: 1;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        
        .about-text {
            flex: 1;
        }
        
        .about-text h3 {
            font-size: 1.8rem;
            color: #1a3a6c;
            margin-bottom: 20px;
        }
        
        .about-text p {
            margin-bottom: 20px;
            color: #555;
        }
        
        .features {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-top: 30px;
        }
        
        .feature-item {
            flex: 1 1 200px;
            padding: 20px;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
        }
        
        .feature-item i {
            font-size: 2.5rem;
            color: #1a3a6c;
            margin-bottom: 15px;
        }
        
        /* 公司动态 */
        #news {
            background-color: #f0f4f8;
        }
        
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
        }
        
        .news-card {
            background-color: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease;
        }
        
        .news-card:hover {
            transform: translateY(-10px);
        }
        
        .news-img {
            height: 220px;
            overflow: hidden;
        }
        
        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .news-card:hover .news-img img {
            transform: scale(1.05);
        }
        
        .news-content {
            padding: 25px;
        }
        
        .news-content h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: #1a3a6c;
        }
        
        .news-date {
            color: #e63946;
            font-size: 0.9rem;
            margin-bottom: 15px;
            display: block;
        }
        
        /* 公司业务 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 30px;
        }
        
        .service-card {
            background-color: white;
            padding: 40px 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: all 0.3s ease;
        }
        
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .service-icon {
            font-size: 3rem;
            color: #1a3a6c;
            margin-bottom: 20px;
        }
        
        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: #1a3a6c;
        }
        
        /* 联系我们 */
        .contact-container {
            display: flex;
            gap: 50px;
        }
        
        .contact-info {
            flex: 1;
        }
        
        .contact-form {
            flex: 1;
        }
        
        .contact-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 30px;
        }
        
        .contact-icon {
            font-size: 1.5rem;
            color: #1a3a6c;
            margin-right: 20px;
            margin-top: 5px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 1rem;
        }
        
        .form-group textarea {
            height: 150px;
            resize: vertical;
        }
        
        /* 页脚 */
        footer {
            background-color: #1a3a6c;
            color: white;
            padding: 70px 0 20px;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 40px;
            margin-bottom: 50px;
        }
        
        .footer-column {
            flex: 1;
            min-width: 250px;
        }
        
        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 2px;
            background-color: #e63946;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a:hover {
            color: #e63946;
            padding-left: 5px;
        }
        
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 15px;
        }
        
        .friend-links a {
            background-color: rgba(255, 255, 255, 0.1);
            padding: 8px 15px;
            border-radius: 3px;
        }
        
        .friend-links a:hover {
            background-color: #e63946;
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .about-content {
                flex-direction: column;
            }
            
            .hero-content h1 {
                font-size: 2.8rem;
            }
            
            .contact-container {
                flex-direction: column;
            }
        }
        
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: white;
                flex-direction: column;
                align-items: center;
                padding: 20px 0;
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
                transform: translateY(-100%);
                opacity: 0;
                transition: all 0.3s ease;
            }
            
            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
            }
            
            .nav-menu li {
                margin: 15px 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero-content h1 {
                font-size: 2.2rem;
            }
            
            .section {
                padding: 60px 0;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
        }
        
        @media (max-width: 576px) {
            .hero-content h1 {
                font-size: 1.8rem;
            }
            
            .hero-btns {
                flex-direction: column;
                align-items: center;
            }
            
            .news-grid,
            .services-grid {
                grid-template-columns: 1fr;
            }
        }