* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-logo h1 {
    color: #2c3e50;
    font-size: 24px;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
}

.nav-menu li {
    margin-left: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover, .nav-menu a.active {
    color: #3498db;
}

/* 横幅 */
.banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 150px 0 100px;
    text-align: center;
}

.banner-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.banner-content p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: #fff;
    color: #667eea;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 优势 */
.advantages {
    padding: 80px 0;
    background: #f8f9fa;
}

.advantages h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #2c3e50;
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.advantage-item {
    text-align: center;
    padding: 30px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.advantage-item h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.advantage-item p {
    color: #666;
}

/* 产品展示 */
.products {
    padding: 80px 0;
}

.products h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #2c3e50;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.product-item {
    text-align: center;
    padding: 30px;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.product-item:hover {
    transform: translateY(-5px);
}

.product-item h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.product-item p {
    color: #666;
}

/* 页脚 */
.footer {
    background: #2c3e50;
    color: #fff;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-info h3, .footer-links h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #fff;
}

.footer-info p {
    margin-bottom: 10px;
    color: #bdc3c7;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    text-decoration: none;
    color: #bdc3c7;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #3498db;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

.footer-bottom p {
    margin-bottom: 10px;
}

.icp-info a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.icp-info a:hover {
    color: #3498db;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
    }

    .nav-menu {
        margin-top: 15px;
    }

    .nav-menu li {
        margin-left: 15px;
    }

    .banner-content h2 {
        font-size: 32px;
    }

    .banner-content p {
        font-size: 16px;
    }

    .advantages h2, .products h2 {
        font-size: 28px;
    }

    .advantage-grid, .product-grid {
        grid-template-columns: 1fr;
    }
}

/* 关于我们页面 */
.about {
    padding: 120px 0 80px;
    background: #f8f9fa;
}

.about h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 30px;
    color: #2c3e50;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content p {
    font-size: 18px;
    margin-bottom: 20px;
    color: #666;
}

/* 产品服务页面 */
.products-page {
    padding: 120px 0 80px;
    background: #f8f9fa;
}

.products-page h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #2c3e50;
}

.product-card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 30px;
    margin-bottom: 30px;
}

.product-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.product-card p {
    color: #666;
    margin-bottom: 10px;
}

/* 联系我们页面 */
.contact {
    padding: 120px 0 80px;
    background: #f8f9fa;
}

.contact h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #2c3e50;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #333;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    font-family: 'Noto Sans SC', sans-serif;
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.btn-submit {
    width: 100%;
    padding: 15px;
    background: #3498db;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
}

.btn-submit:hover {
    background: #2980b9;
}

.contact-info {
    max-width: 600px;
    margin: 40px auto 0;
    text-align: center;
}

.contact-info p {
    font-size: 18px;
    margin-bottom: 10px;
    color: #666;
}