/* 基础样式 */
        :root {
            --primary-color: #1a73e8;
            --secondary-color: #34a853;
            --dark-color: #202124;
            --light-color: #f8f9fa;
            --text-color: #333;
            --text-light: #666;
            --border-color: #e0e0e0;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部和导航 */
        header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 20px;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .logo span {
            color: var(--secondary-color);
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav li {
            margin-left: 30px;
        }
        
        nav a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 500;
            font-size: 1rem;
            transition: color 0.3s;
        }
        
        nav a:hover {
            color: var(--primary-color);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark-color);
        }
        
        /* 主要内容区域 */
        main {
            margin-top: 80px;
        }
        
        section {
            padding: 80px 0;
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-header h2 {
            font-size: 2.2rem;
            margin-bottom: 15px;
            color: var(--dark-color);
        }
        
        .section-header p {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* 首页/英雄区域 */
        #home {
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
            padding: 100px 0;
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        
        .hero-text {
            flex: 1;
            padding-right: 40px;
        }
        
        .hero-text h1 {
            font-size: 2.8rem;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--dark-color);
        }
        
        .hero-text p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            color: var(--text-light);
        }
        
        .hero-image {
            flex: 1;
            text-align: center;
        }
        
        .hero-image img {
            max-width: 100%;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        
        .cta-button {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 5px;
            text-decoration: none;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        
        .cta-button:hover {
            background-color: #0d62c9;
        }
        
        /* 关于我们 */
        #about {
            background-color: var(--light-color);
        }
        
        .about-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .about-text {
            flex: 1;
        }
        
        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--dark-color);
        }
        
        .about-text p {
            margin-bottom: 20px;
        }
        
        .about-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 30px;
        }
        
        .stat-item {
            text-align: center;
            padding: 20px;
            background: white;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .stat-number {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 5px;
        }
        
        /* 公司动态 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .news-item {
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
        }
        
        .news-item:hover {
            transform: translateY(-10px);
        }
        
        .news-img {
            height: 200px;
            width: 100%;
            object-fit: cover;
        }
        
        .news-content {
            padding: 20px;
        }
        
        .news-date {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-bottom: 10px;
        }
        
        .news-content h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
        
        /* 公司业务 */
        #services {
            background-color: var(--light-color);
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 30px;
        }
        
        .service-item {
            background: white;
            padding: 30px;
            border-radius: 8px;
            text-align: center;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s;
        }
        
        .service-item:hover {
            transform: translateY(-10px);
        }
        
        .service-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        .service-item h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
        }
        
        /* 联系我们 */
        .contact-container {
            display: flex;
            gap: 50px;
        }
        
        .contact-info {
            flex: 1;
        }
        
        .contact-info h3 {
            font-size: 1.5rem;
            margin-bottom: 20px;
        }
        
        .contact-details {
            margin-bottom: 30px;
        }
        
        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
        }
        
        .contact-icon {
            font-size: 1.2rem;
            color: var(--primary-color);
            margin-right: 10px;
            width: 30px;
        }
        
        .contact-form {
            flex: 1;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }
        
        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 5px;
            font-size: 1rem;
        }
        
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        
        /* 页脚 */
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            color: white;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .friend-links a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .friend-links a:hover {
            color: white;
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #444;
            color: #aaa;
            font-size: 0.9rem;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero-content, .about-content, .contact-container {
                flex-direction: column;
            }
            
            .hero-text, .about-text {
                padding-right: 0;
                margin-bottom: 40px;
            }
            
            .hero-text h1 {
                font-size: 2.3rem;
            }
        }
        
        @media (max-width: 768px) {
            nav ul {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: white;
                flex-direction: column;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
                padding: 20px;
            }
            
            nav ul.active {
                display: flex;
            }
            
            nav li {
                margin: 0 0 15px 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .section-header h2 {
                font-size: 1.8rem;
            }
            
            .hero-text h1 {
                font-size: 2rem;
            }
            
            section {
                padding: 60px 0;
            }
        }