/* 全局样式 */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --accent-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #2c3e50;
    --text-color: #333;
    --text-light: #7f8c8d;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #f9f9f9;
}

a {
    text-decoration: none;
    color: var(--secondary-color);
    transition: color 0.3s;
}

a:hover {
    color: var(--accent-color);
}

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

/* 头部 */
header {
    background-color: var(--primary-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

/* 导航 */
nav {
    background-color: var(--dark-color);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

nav .container {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

nav a {
    color: white;
    padding: 0.5rem 1rem;
    margin: 0 0.5rem;
    border-radius: 4px;
}

nav a:hover {
    background-color: var(--secondary-color);
    color: white;
}

/* 主要内容 */
main {
    margin-bottom: 2rem;
    min-height: 60vh;
}

/* 文章列表 */
.post-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.post-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.post-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.post-content {
    padding: 1.5rem;
}

.post-content h3 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.post-meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

/* 文章页 */
.article-header {
    margin-bottom: 2rem;
}

.article-header h1 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.article-meta {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.article-content {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.article-content h2 {
    color: var(--primary-color);
    margin: 1.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
}

.article-content h3 {
    color: var(--dark-color);
    margin: 1.2rem 0 0.8rem;
}

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

.article-content ul, .article-content ol {
    margin-bottom: 1rem;
    padding-left: 2rem;
}

/* 侧边栏 */
.sidebar {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.sidebar h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
}

/* 页脚 */
footer {
    background-color: var(--dark-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }
    
    .post-list {
        grid-template-columns: 1fr;
    }
}