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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

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

/* 头部 */
.site-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px 0;
    text-align: center;
}

.site-title {
    font-size: 2.5em;
    margin-bottom: 10px;
    font-weight: 700;
}

.site-subtitle {
    font-size: 1.2em;
    opacity: 0.9;
    margin-bottom: 30px;
}

/* 导航 */
.main-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.main-nav a {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(255,255,255,0.2);
    transition: all 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    background: rgba(255,255,255,0.4);
    transform: translateY(-2px);
}

/* 主要内容 */
.site-main {
    padding: 40px 0;
}

.section-title {
    font-size: 1.8em;
    margin-bottom: 30px;
    color: #333;
    border-left: 4px solid #667eea;
    padding-left: 15px;
}

/* 精选网格 */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.featured-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.featured-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.15);
}

.card-icon {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.featured-card h3 {
    font-size: 1.4em;
    margin-bottom: 10px;
    color: #333;
}

.card-source {
    color: #666;
    font-size: 0.9em;
    margin-bottom: 15px;
}

.card-list {
    list-style: none;
    margin-bottom: 15px;
}

.card-list li {
    padding: 5px 0;
    border-bottom: 1px solid #eee;
}

.card-list li:before {
    content: '• ';
    color: #667eea;
    font-weight: bold;
}

.card-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    margin-top: 10px;
}

.card-link:hover {
    text-decoration: underline;
}

/* 分类颜色 */
.featured-card.music { border-top: 4px solid #e74c3c; }
.featured-card.film { border-top: 4px solid #3498db; }
.featured-card.tech { border-top: 4px solid #2ecc71; }
.featured-card.art { border-top: 4px solid #9b59b6; }
.featured-card.culture { border-top: 4px solid #f39c12; }
.featured-card.science { border-top: 4px solid #1abc9c; }

/* 关于部分 */
.about-section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-top: 40px;
}

.about-content p {
    margin-bottom: 10px;
    color: #555;
}

/* 页脚 */
.site-footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 30px 0;
    margin-top: 50px;
}

.site-footer p {
    margin-bottom: 5px;
    opacity: 0.8;
}

/* 响应式 */
@media (max-width: 768px) {
    .site-title {
        font-size: 1.8em;
    }
    
    .main-nav {
        gap: 10px;
    }
    
    .main-nav a {
        padding: 6px 12px;
        font-size: 0.9em;
    }
    
    .featured-grid {
        grid-template-columns: 1fr;
    }
}