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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

a {
    color: #0056b3;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

/* 布局样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 15px 0;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #0056b3;
}

nav ul {
    display: flex;
    list-style: none;
    margin-top: 15px;
}

nav li {
    margin-right: 20px;
}

/* 面包屑导航 */
.breadcrumb {
    padding: 15px 0;
    font-size: 14px;
    color: #6c757d;
}

/* 主要内容区域 */
main {
    display: flex;
    gap: 30px;
    margin: 20px 0;
}

article {
    flex: 2;
    background: #fff;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

aside {
    flex: 1;
}

/* 文章标题 */
.article-header h1 {
    font-size: 32px;
    line-height: 1.2;
    margin-bottom: 15px;
    color: #212529;
}

.article-meta {
    color: #6c757d;
    font-size: 14px;
    margin-bottom: 20px;
}

.article-meta span {
    margin-right: 15px;
}

/* 文章图片 */
.featured-image {
    margin: 20px 0;
    position: relative;
}

.featured-image figcaption {
    font-size: 14px;
    color: #6c757d;
    margin-top: 8px;
}

/* 文章内容 */
.article-content {
    font-size: 18px;
    line-height: 1.8;
}

.article-content p {
    margin-bottom: 20px;
}

.article-content h2 {
    font-size: 24px;
    margin: 30px 0 15px;
    color: #343a40;
}

.article-content blockquote {
    border-left: 4px solid #0056b3;
    padding-left: 20px;
    margin: 20px 0;
    font-style: italic;
    color: #495057;
}

/* 相关新闻 */
.related-news {
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 30px;
}

.related-news h3 {
    font-size: 20px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #dee2e6;
}

.related-news ul {
    list-style: none;
}

.related-news li {
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid #f1f1f1;
}

/* 侧边栏 */
.popular-articles {
    background: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.popular-articles h3 {
    font-size: 20px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #dee2e6;
}

.popular-articles ul {
    list-style: none;
}

.popular-articles li {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid #f1f1f1;
}

/* 页脚 */
footer {
    background: #343a40;
    color: #fff;
    padding: 40px 0 20px;
    margin-top: 40px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.footer-section {
    flex: 1;
    min-width: 200px;
    margin-bottom: 20px;
}

.footer-section h4 {
    margin-bottom: 15px;
    font-size: 18px;
}

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

.footer-section li {
    margin-bottom: 8px;
}

.footer-section a {
    color: #ddd;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    margin-top: 20px;
    border-top: 1px solid #495057;
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    main {
        flex-direction: column;
    }
    
    .article-header h1 {
        font-size: 28px;
    }
    
    .article-content {
        font-size: 16px;
    }
    
    nav ul {
        flex-wrap: wrap;
    }
    
    .footer-content {
        flex-direction: column;
    }
}