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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 头部样式 */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

nav h1 {
    font-size: 1.8rem;
    font-weight: 600;
}

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

nav a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

nav a:hover {
    opacity: 0.8;
}

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

/* 英雄区域 */
#hero {
    text-align: center;
    padding: 4rem 0;
    background: white;
    border-radius: 10px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

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

#hero p {
    font-size: 1.2rem;
    color: #7f8c8d;
}

/* 文章列表 */
#blog-posts h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #2c3e50;
}

.post-card {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    cursor: pointer;
}

.post-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 25px rgba(0,0,0,0.15);
}

.post-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #2c3e50;
}

.post-meta {
    color: #7f8c8d;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.post-excerpt {
    color: #5d6d7e;
    line-height: 1.6;
}

/* 文章内容 */
#post-content {
    background: white;
    border-radius: 10px;
    padding: 2rem;
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

#back-btn {
    background: #667eea;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 2rem;
    transition: background 0.3s;
}

#back-btn:hover {
    background: #5a6fd8;
}

#post-article {
    line-height: 1.8;
}

#post-article h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

#post-article h2 {
    font-size: 2rem;
    margin: 2rem 0 1rem;
    color: #34495e;
}

#post-article h3 {
    font-size: 1.5rem;
    margin: 1.5rem 0 0.5rem;
    color: #34495e;
}

#post-article p {
    margin-bottom: 1rem;
    color: #2c3e50;
}

#post-article code {
    background: #f8f9fa;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Monaco', 'Consolas', 'Courier New', monospace;
    font-size: 0.9rem;
}

#post-article pre {
    background: #2d3748;
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
    margin: 1.5rem 0;
}

#post-article blockquote {
    border-left: 4px solid #667eea;
    padding-left: 1rem;
    margin: 1.5rem 0;
    color: #5d6d7e;
    font-style: italic;
}

#post-article ul, #post-article ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

#post-article li {
    margin-bottom: 0.5rem;
}

/* 加载动画 */
.loading {
    text-align: center;
    padding: 2rem;
    color: #7f8c8d;
}

/* 底部 */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        gap: 1rem;
    }
    
    #hero h2 {
        font-size: 2rem;
    }
    
    #hero p {
        font-size: 1rem;
    }
    
    main {
        padding: 1rem;
    }
    
    .post-card {
        padding: 1.5rem;
    }
}