* {
            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 15px;
        }
        
        /* 头部样式 */
        header {
            background-color: #fff;
            box-shadow: 0 2px 15px 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 0;
        }
        
        .logo {
            font-size: 28px;
            font-weight: 700;
            color: #2c3e50;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        
        .logo i {
            color: #3498db;
            margin-right: 10px;
            font-size: 32px;
        }
        
        .logo span {
            color: #3498db;
        }
        
        /* 导航样式 */
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav li {
            margin-left: 30px;
        }
        
        nav a {
            text-decoration: none;
            color: #2c3e50;
            font-weight: 600;
            font-size: 16px;
            transition: color 0.3s;
            padding: 5px 0;
            position: relative;
        }
        
        nav a:hover, nav a.active {
            color: #3498db;
        }
        
        nav a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background: #3498db;
            left: 0;
            bottom: 0;
            transition: width 0.3s;
        }
        
        nav a:hover::after, nav a.active::after {
            width: 100%;
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: #2c3e50;
            cursor: pointer;
        }
        
        /* 主要区域样式 */
        main {
            margin-top: 80px;
        }
        
        section {
            padding: 80px 0;
            border-bottom: 1px solid #eee;
        }
        
        section:last-of-type {
            border-bottom: none;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 36px;
            color: #2c3e50;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            width: 70px;
            height: 3px;
            background: #3498db;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
        }
        
        .section-title p {
            color: #7f8c8d;
            max-width: 700px;
            margin: 0 auto;
            font-size: 18px;
        }
        
        /* 首页/横幅区域 */
        #home {
            background: linear-gradient(rgba(44, 62, 80, 0.85), rgba(44, 62, 80, 0.9)), url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1170&q=80') no-repeat center center/cover;
            color: white;
            text-align: center;
            padding: 150px 0;
            border-bottom: none;
        }
        
        #home h1 {
            font-size: 48px;
            margin-bottom: 20px;
            line-height: 1.2;
        }
        
        #home p {
            font-size: 22px;
            max-width: 800px;
            margin: 0 auto 30px;
            opacity: 0.9;
        }
        
        .cta-button {
            display: inline-block;
            background: #3498db;
            color: white;
            padding: 15px 35px;
            font-size: 18px;
            font-weight: 600;
            border-radius: 5px;
            text-decoration: none;
            transition: all 0.3s;
            border: 2px solid #3498db;
        }
        
        .cta-button:hover {
            background: transparent;
            color: #3498db;
        }
        
        /* 关于我们 */
        .about-content {
            display: flex;
            align-items: center;
            gap: 50px;
        }
        
        .about-img {
            flex: 1;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        
        .about-img img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s;
        }
        
        .about-img img:hover {
            transform: scale(1.03);
        }
        
        .about-text {
            flex: 1;
        }
        
        .about-text h3 {
            font-size: 28px;
            color: #2c3e50;
            margin-bottom: 20px;
        }
        
        .about-text p {
            margin-bottom: 20px;
            color: #555;
            font-size: 17px;
        }
        
        .features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }
        
        .feature-item {
            background: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: transform 0.3s;
        }
        
        .feature-item:hover {
            transform: translateY(-10px);
        }
        
        .feature-item i {
            font-size: 40px;
            color: #3498db;
            margin-bottom: 20px;
        }
        
        .feature-item h4 {
            font-size: 20px;
            margin-bottom: 15px;
            color: #2c3e50;
        }
        
        /* 公司动态 */
        .news-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, 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(-5px);
        }
        
        .news-img {
            height: 200px;
            overflow: hidden;
        }
        
        .news-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .news-item:hover .news-img img {
            transform: scale(1.05);
        }
        
        .news-content {
            padding: 25px;
        }
        
        .news-date {
            color: #7f8c8d;
            font-size: 14px;
            margin-bottom: 10px;
            display: block;
        }
        
        .news-content h3 {
            font-size: 20px;
            margin-bottom: 15px;
            color: #2c3e50;
        }
        
        .news-content p {
            color: #666;
            margin-bottom: 20px;
        }
        
        .read-more {
            color: #3498db;
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
        }
        
        .read-more i {
            margin-left: 5px;
            transition: transform 0.3s;
        }
        
        .read-more:hover i {
            transform: translateX(5px);
        }
        
        /* 公司业务 */
        .services-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        
        .service-item {
            background: white;
            padding: 40px 30px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            transition: all 0.3s;
        }
        
        .service-item:hover {
            background: #3498db;
            color: white;
        }
        
        .service-item:hover h3,
        .service-item:hover p,
        .service-item:hover i {
            color: white;
        }
        
        .service-item i {
            font-size: 50px;
            color: #3498db;
            margin-bottom: 25px;
        }
        
        .service-item h3 {
            font-size: 22px;
            margin-bottom: 20px;
            color: #2c3e50;
        }
        
        .service-item p {
            color: #666;
        }
        
        /* 联系我们 */
        .contact-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 40px;
        }
        
        .contact-info {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        
        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }
        
        .contact-item i {
            font-size: 24px;
            color: #3498db;
            margin-top: 5px;
        }
        
        .contact-text h4 {
            font-size: 18px;
            margin-bottom: 5px;
            color: #2c3e50;
        }
        
        .contact-form {
            background: white;
            padding: 40px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            color: #2c3e50;
            font-weight: 600;
        }
        
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 16px;
            transition: border 0.3s;
        }
        
        .form-control:focus {
            border-color: #3498db;
            outline: none;
        }
        
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        
        .submit-btn {
            background: #3498db;
            color: white;
            border: none;
            padding: 15px 35px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 5px;
            cursor: pointer;
            transition: background 0.3s;
        }
        
        .submit-btn:hover {
            background: #2980b9;
        }
        
        /* 底部样式 */
        footer {
            background: #2c3e50;
            color: white;
            padding: 70px 0 20px;
        }
        
        .footer-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-col h3 {
            font-size: 22px;
            margin-bottom: 25px;
            color: white;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-col h3::after {
            content: '';
            position: absolute;
            width: 50px;
            height: 2px;
            background: #3498db;
            bottom: 0;
            left: 0;
        }
        
        .footer-col p {
            color: #bbb;
            margin-bottom: 20px;
            line-height: 1.8;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            font-size: 18px;
            transition: all 0.3s;
        }
        
        .social-links a:hover {
            background: #3498db;
            transform: translateY(-3px);
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #bbb;
            text-decoration: none;
            transition: color 0.3s;
            display: inline-flex;
            align-items: center;
        }
        
        .footer-links a:hover {
            color: #3498db;
            padding-left: 5px;
        }
        
        .footer-links a i {
            margin-right: 8px;
        }
        
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 15px;
        }
        
        .friend-links a {
            color: #bbb;
            text-decoration: none;
            padding: 5px 10px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 3px;
            transition: all 0.3s;
        }
        
        .friend-links a:hover {
            color: #3498db;
            background: rgba(255, 255, 255, 0.1);
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #bbb;
            font-size: 15px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .about-content {
                flex-direction: column;
            }
            
            .about-img, .about-text {
                width: 100%;
            }
            
            .section-title h2 {
                font-size: 32px;
            }
            
            #home h1 {
                font-size: 40px;
            }
        }
        
        @media (max-width: 768px) {
            nav {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background: white;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.3s;
            }
            
            nav.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            
            nav ul {
                flex-direction: column;
                padding: 20px;
            }
            
            nav li {
                margin: 0 0 15px 0;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .section-title h2 {
                font-size: 28px;
            }
            
            #home h1 {
                font-size: 32px;
            }
            
            #home p {
                font-size: 18px;
            }
            
            section {
                padding: 60px 0;
            }
            
            .contact-form {
                padding: 30px;
            }
        }
        
        @media (max-width: 576px) {
            #home {
                padding: 120px 0;
            }
            
            .logo {
                font-size: 24px;
            }
            
            .section-title h2 {
                font-size: 26px;
            }
            
            .service-item, .feature-item {
                padding: 25px 20px;
            }
        }