* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: "Microsoft JhengHei", "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f8f9fa;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部样式 */
        header {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .header-top {
            background-color: #0056a8;
            color: white;
            padding: 10px 0;
        }
        
        .header-contact {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .contact-info {
            display: flex;
            gap: 30px;
        }
        
        .contact-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .logo-section {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .logo img {
            height: 60px;
        }
        
        .logo-text h1 {
            font-size: 24px;
            color: #0056a8;
            margin-bottom: 5px;
        }
        
        .logo-text p {
            font-size: 14px;
            color: #666;
        }
        
        .years-badge {
            background-color: #0056a8;
            color: white;
            padding: 8px 15px;
            border-radius: 4px;
            font-weight: bold;
        }
        
        /* 导航样式 - 桌面端 */
        nav {
            background-color: #0056a8;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
        }
        
        .nav-menu li {
            position: relative;
        }
        
        .nav-menu a {
            color: white;
            text-decoration: none;
            padding: 15px 20px;
            display: block;
            font-weight: 500;
            transition: background-color 0.3s;
        }
        
        .nav-menu a:hover {
            background-color: #004085;
        }
        
        /* 汉堡菜单样式 - 移动端 */
        .hamburger {
            display: none;
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1001;
            width: 45px;
            height: 45px;
            background-color: #0056a8;
            border-radius: 50%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            cursor: pointer;
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
        }
        
        .hamburger span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: white;
            margin: 3px 0;
            transition: all 0.3s ease;
            border-radius: 2px;
        }
        
        /* 导航弹窗样式 */
        .nav-modal {
            position: fixed;
            top: 0;
            right: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 86, 168, 0.95);
            z-index: 1000;
            transform: translateX(100%);
            transition: transform 0.3s ease-out;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 20px;
        }
        
        .nav-modal.active {
            transform: translateX(0);
        }
        
        .nav-modal .nav-menu {
            flex-direction: column;
            width: 100%;
            max-width: 300px;
            text-align: center;
        }
        
        .nav-modal .nav-menu li {
            margin: 10px 0;
        }
        
        .nav-modal .nav-menu a {
            font-size: 18px;
            padding: 15px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .close-nav {
            position: absolute;
            top: 25px;
            right: 25px;
            color: white;
            font-size: 30px;
            cursor: pointer;
            width: 40px;
            height: 40px;
            display: flex;
            justify-content: center;
            align-items: center;
            border-radius: 50%;
            background-color: rgba(255, 255, 255, 0.1);
        }
        
        /* 英雄区域 */
        .hero {
            background: linear-gradient(rgba(0, 50, 100, 0.8), rgba(0, 30, 70, 0.8)), url('https://images.unsplash.com/photo-1530549387789-4c1017266635?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0;
            text-align: center;
        }
        
        .hero h2 {
            font-size: 42px;
            margin-bottom: 20px;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
        }
        
        .hero p {
            font-size: 20px;
            max-width: 800px;
            margin: 0 auto 30px;
        }
        
        .btn-primary {
            background-color: #ff6b00;
            color: white;
            border: none;
            padding: 15px 40px;
            font-size: 18px;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s;
            font-weight: bold;
            -webkit-tap-highlight-color: transparent;
            touch-action: manipulation;
        }
        
        .btn-primary:hover {
            background-color: #e05a00;
        }
        
        .btn-primary:active {
            transform: scale(0.98);
        }
        
        /* 关于我们 */
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            position: relative;
            padding-bottom: 15px;
        }
        
        .section-title h2 {
            font-size: 32px;
            color: #0056a8;
            margin-bottom: 10px;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 100px;
            height: 3px;
            background-color: #ff6b00;
        }
        
        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            margin-bottom: 50px;
        }
        
        .stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            text-align: center;
        }
        
        .stat-item {
            background-color: white;
            padding: 30px 20px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .stat-number {
            font-size: 36px;
            font-weight: bold;
            color: #0056a8;
            margin-bottom: 10px;
        }
        
        /* 服务项目 */
        .services {
            background-color: #f0f7ff;
            padding: 80px 0;
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .service-card {
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s;
        }
        
        .service-card:hover {
            transform: translateY(-10px);
        }
        
        .service-img {
            height: 200px;
            overflow: hidden;
        }
        
        .service-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .service-card:hover .service-img img {
            transform: scale(1.05);
        }
        
        .service-content {
            padding: 25px;
        }
        
        .service-content h3 {
            color: #0056a8;
            margin-bottom: 15px;
            font-size: 20px;
        }
        
        .service-content ul {
            list-style-position: inside;
            margin-left: 10px;
        }
        
        .service-content li {
            margin-bottom: 8px;
            color: #555;
        }
        
        /* 成功案例 */
        .projects {
            padding: 80px 0;
        }
        
        .project-filter {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 40px;
        }
        
        .filter-btn {
            background-color: #e9ecef;
            border: none;
            padding: 10px 20px;
            border-radius: 30px;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .filter-btn.active, .filter-btn:hover {
            background-color: #0056a8;
            color: white;
        }
        
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .project-card {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            background-color: white;
        }
        
        .project-img {
            height: 250px;
            overflow: hidden;
        }
        
        .project-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .project-info {
            padding: 20px;
        }
        
        .project-info h3 {
            color: #0056a8;
            margin-bottom: 10px;
        }
        
        /* 页脚 */
        footer {
            background-color: #1a2b42;
            color: white;
            padding: 60px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-logo h3 {
            font-size: 24px;
            margin-bottom: 15px;
            color: white;
        }
        
        .footer-contact h4, .footer-services h4, .footer-newsletter h4 {
            font-size: 18px;
            margin-bottom: 20px;
            color: #ff6b00;
        }
        
        .footer-contact p {
            margin-bottom: 10px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }
        
        .footer-services ul {
            list-style: none;
        }
        
        .footer-services li {
            margin-bottom: 10px;
        }
        
        .footer-services a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-services a:hover {
            color: #ff6b00;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #2a3b52;
            font-size: 14px;
            color: #aaa;
        }
        
        /* 消息提示样式 */
        .message-container {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 9999;
            max-width: 400px;
        }
        
        .message {
            padding: 15px 20px;
            border-radius: 4px;
            margin-bottom: 10px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            gap: 10px;
            animation: slideIn 0.3s ease-out;
        }
        
        .message.success {
            background-color: #d4edda;
            color: #155724;
            border-left: 4px solid #28a745;
        }
        
        .message.error {
            background-color: #f8d7da;
            color: #721c24;
            border-left: 4px solid #dc3545;
        }
        
        .message i {
            font-size: 20px;
        }
        
        @keyframes slideIn {
            from {
                transform: translateX(400px);
                opacity: 0;
            }
            to {
                transform: translateX(0);
                opacity: 1;
            }
        }
        
        @keyframes slideOut {
            from {
                transform: translateX(0);
                opacity: 1;
            }
            to {
                transform: translateX(400px);
                opacity: 0;
            }
        }
        
        /* 响应式样式 */
        @media (min-width: 993px) {
            /* 桌面端隐藏汉堡菜单和导航弹窗 */
            .hamburger, .nav-modal, .close-nav {
                display: none !important;
            }
        }
        
        @media (max-width: 992px) {
            /* 平板样式 */
            .services-grid, .projects-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
            
            /* 平板端隐藏普通导航，显示汉堡菜单 */
            nav .nav-menu {
                display: none;
            }
            
            .hamburger {
                display: flex;
            }
        }
        
        @media (max-width: 768px) {
            /* 手机样式 */
            .about-content, .services-grid, .projects-grid {
                grid-template-columns: 1fr;
            }
            
            .stats {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            
            .header-contact {
                flex-direction: column;
                gap: 10px;
                text-align: center;
            }
            
            .contact-info {
                flex-direction: column;
                gap: 10px;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .message-container {
                top: 10px;
                right: 10px;
                left: 10px;
                max-width: none;
            }
            
            .message {
                font-size: 14px;
                padding: 12px 15px;
            }
            
            /* 移动端优化 */
            .hero {
                padding: 60px 0;
            }
            
            .hero h2 {
                font-size: 28px;
            }
            
            .hero p {
                font-size: 16px;
            }
            
            .btn-primary {
                padding: 12px 30px;
                font-size: 16px;
            }
            
            .section-title h2 {
                font-size: 24px;
            }
            
            /* 联系表单移动端优化 */
            .contact-grid {
                grid-template-columns: 1fr !important;
                gap: 30px !important;
            }
            
            .contact-section {
                padding: 40px 0 !important;
            }
            
            .contact-section input,
            .contact-section select,
            .contact-section textarea {
                font-size: 16px !important;
            }
            
            .contact-section h3 {
                font-size: 20px;
            }
            
            .contact-section p {
                font-size: 14px;
            }
            
            /* 移动端logo区域优化 */
            .logo-section {
                flex-direction: column;
                gap: 15px;
                text-align: center;
            }
            
            .logo-text h1 {
                font-size: 20px;
            }
            
            .years-badge {
                margin-top: 10px;
            }
            
            /* 移动端头部联系信息优化 */
            .header-top {
                padding: 10px 0;
                font-size: 14px;
            }
            
            .contact-item span {
                font-size: 13px;
            }
        }
        
        /* 汉堡菜单动画效果 */
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }