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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 头部导航 */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #007bff;
}

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

.nav-links li {
    margin-left: 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #007bff;
}

/* 主要内容区域 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.hero {
    text-align: center;
    padding: 3rem 0;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #007bff;
}

.hero p {
    font-size: 1.2rem;
    color: #666;
}

.articles h2 {
    margin-bottom: 1.5rem;
    color: #007bff;
}

/* 文章卡片 */
.article-card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
    overflow: hidden;
    transition: transform 0.3s;
}

.article-card:hover {
    transform: translateY(-5px);
}

.article-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.article-content {
    padding: 1.5rem;
}

.article-content h3 {
    margin-bottom: 0.5rem;
    color: #333;
}

.article-content p {
    color: #666;
    margin-bottom: 1rem;
}

.read-more {
    display: inline-block;
    background-color: #007bff;
    color: white;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.read-more:hover {
    background-color: #0056b3;
}

/* 页脚 */
footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        padding: 1rem;
    }
    
    .nav-links {
        margin-top: 1rem;
    }
    
    .nav-links li {
        margin: 0 0.5rem;
    }
    
    main {
        padding: 0 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
}