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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

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

/* 导航栏样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav {
    padding: 1rem 0;
}

.nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    color: #2c3e50;
    text-decoration: none;
}

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

.nav-links a {
    color: #2c3e50;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* 主要内容区域 */
.main {
    margin-top: 80px;
    padding: 2rem 0;
}

.hero {
    text-align: center;
    padding: 4rem 0;
    background-color: #fff;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.hero h2 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

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

/* 文章卡片样式 */
.articles {
    margin: 2rem 0;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.article-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.article-card h4 {
    color: #2c3e50;
    margin-bottom: 1rem;
}

.read-more {
    display: inline-block;
    margin-top: 1rem;
    color: #3498db;
    text-decoration: none;
    font-weight: 500;
}

.read-more:hover {
    text-decoration: underline;
}

/* 关于部分 */
.about {
    background-color: #fff;
    padding: 2rem;
    border-radius: 8px;
    margin: 2rem 0;
}

/* 页脚样式 */
.footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 2rem 0;
    margin-top: 4rem;
}

.footer .beian {
    color: #fff;
    text-decoration: none;
    opacity: 0.8;
    font-size: 0.9rem;
    transition: opacity 0.3s ease;
}

.footer .beian:hover {
    opacity: 1;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .article-grid {
        grid-template-columns: 1fr;
    }
}