/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 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: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo h1 {
    color: #2c3e50;
    font-size: 1.8rem;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

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

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

/* 轮播横幅 */
.banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 4rem 0;
}

.banner-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.banner-content p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 主要内容 */
main {
    padding: 2rem 0;
    min-height: calc(100vh - 200px);
}

/* 页面标题 */
.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h2 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.1rem;
    color: #666;
}

/* 介绍部分 */
.intro, .company-intro, .products-intro {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.intro h2, .company-intro h3, .products-intro h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.intro p, .company-intro p {
    margin-bottom: 1rem;
    color: #555;
    line-height: 1.8;
}

.intro ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.intro li {
    margin-bottom: 0.5rem;
    color: #555;
}

/* 分类网格 */
.categories, .product-categories {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.categories h2, .product-categories h3 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.category-item, .product-category {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.category-item:hover, .product-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.category-item h3, .product-category h5 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.category-item p, .product-category p {
    color: #666;
    font-size: 0.9rem;
}

/* 服务列表 */
.services, .service-notice {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.services h2, .service-notice h4 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.service-item {
    text-align: center;
    padding: 1.5rem;
}

.service-item h3 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.service-item p {
    color: #666;
    font-size: 0.9rem;
}

/* 联系信息 */
.contact-info, .contact-form, .icp-info {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.contact-info h3, .contact-form h3, .icp-info h4 {
    color: #2c3e50;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.contact-item {
    text-align: center;
    padding: 1.5rem;
}

.contact-item h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: #666;
    margin-bottom: 0.3rem;
}

.contact-form p, .icp-info p {
    margin-bottom: 0.5rem;
    color: #666;
    line-height: 1.6;
}

.icp-info ul {
    margin-left: 1.5rem;
    color: #666;
}

/* 页脚样式 */
footer {
    background: #2c3e50;
    color: white;
    padding: 2rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-info h3 {
    color: #3498db;
    margin-bottom: 0.5rem;
}

.footer-info p {
    color: #bdc3c7;
    font-size: 0.9rem;
}

.footer-links h4, .footer-contact h4 {
    color: #3498db;
    margin-bottom: 1rem;
}

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

.footer-links li {
    margin-bottom: 0.5rem;
}

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

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

.footer-contact p {
    color: #bdc3c7;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

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

.footer-bottom a {
    color: #3498db;
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        gap: 1rem;
    }
    
    .banner-content h2 {
        font-size: 2rem;
    }
    
    .banner-content p {
        font-size: 1rem;
    }
    
    main {
        padding: 1rem 0;
    }
    
    .page-header h2 {
        font-size: 1.5rem;
    }
    
    .category-grid,
    .service-list,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}