/* 全局样式 */
* {
    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: #f7f9fc;
}

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

/* 头部样式 */
header {
    background-color: #fff;
    padding: 30px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 20px;
}

nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
}

nav ul li {
    margin: 0 20px;
}

nav ul li a {
    color: #666;
    text-decoration: none;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

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

/* 主要内容样式 */
main {
    padding: 50px 0;
}

.articles {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 40px;
}

.article-preview {
    background-color: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.article-preview:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 226px rgba(0, 0, 0, 0.12);
}

.article-preview h2 {
    margin-bottom: 15px;
    font-size: 1.8rem;
}

.article-preview h2 a {
    color: #2c3e50;
    text-decoration: none;
    transition: color 0.3s ease;
}

.article-preview h2 a:hover {
    color: #3498db;
}

.article-preview .meta {
    color: #999;
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.article-preview p {
    color: #666;
    font-size: 1rem;
    line-height: 1.7;
}

/* 文章详情页样式 */
.article-detail {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    border-radius: 10px;
    padding: 50px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.article-detail h1 {
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.article-detail .meta {
    color: #999;
    font-size: 1rem;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.article-detail .content {
    color: #555;
    font-size: 1.1rem;
    line-height: 1.8;
}

.article-detail .content h2 {
    color: #34495e;
    margin: 30px 0 20px;
    font-size: 2rem;
}

.article-detail .content h3 {
    color: #34495e;
    margin: 25px 0 15px;
    font-size: 1.5rem;
}

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

.article-detail .content ul, .article-detail .content ol {
    margin-bottom: 20px;
    padding-left: 40px;
}

.article-detail .content li {
    margin-bottom: 10px;
}

.article-detail .content pre {
    background-color: #f8f9fa;
    padding: 20px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 20px;
    font-family: 'Courier New', Courier, monospace;
}

.article-detail .content code {
    background-color: #f8f9fa;
    padding: 2px 5px;
    border-radius: 3px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
}

.back-link {
    display: inline-block;
    margin-top: 30px;
    color: #3498db;
    text-decoration: none;
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.back-link:hover {
    color: #2980b9;
    text-decoration: underline;
}

/* 关于部分样式 */
.about-section {
    background-color: #fff;
    padding: 80px 0;
    margin: 50px 0;
}

.about-section h2 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 40px;
    font-size: 2.2rem;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
    color: #555;
    font-size: 1.1rem;
}

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

/* 页脚样式 */
footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

footer p {
    font-size: 1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .articles {
        grid-template-columns: 1fr;
    }
    
    .article-detail {
        padding: 30px 20px;
    }
    
    .article-detail h1 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    header {
        padding: 20px 0;
    }
    
    header h1 {
        font-size: 1.8rem;
    }
    
    nav ul li {
        margin: 0 10px;
    }
    
    main {
        padding: 30px 0;
    }
    
    .article-preview {
        padding: 20px;
    }
}