/* 观点365 - 样式表 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #1a1a1a;
    text-decoration: none;
}

.main-nav a {
    color: #555;
    text-decoration: none;
    margin-left: 25px;
    font-size: 15px;
    transition: color 0.3s;
}

.main-nav a:hover {
    color: #e74c3c;
}

/* 主体区 */
main {
    padding: 40px 0;
}

/* 英雄区 */
.hero {
    text-align: center;
    padding: 60px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-radius: 12px;
    margin-bottom: 40px;
}

.hero h1 {
    font-size: 42px;
    margin-bottom: 15px;
}

.hero p {
    font-size: 18px;
    opacity: 0.9;
}

/* 文章区 */
.articles h2 {
    font-size: 28px;
    margin-bottom: 25px;
    color: #1a1a1a;
    border-left: 4px solid #e74c3c;
    padding-left: 15px;
}

.article-list {
    display: grid;
    gap: 25px;
}

.article-card {
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.08);
    transition: transform 0.3s, box-shadow 0.3s;
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 25px rgba(0,0,0,0.12);
}

.category {
    display: inline-block;
    background: #e74c3c;
    color: #fff;
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 12px;
    margin-bottom: 12px;
}

.article-card h3 {
    font-size: 22px;
    margin-bottom: 12px;
}

.article-card h3 a {
    color: #1a1a1a;
    text-decoration: none;
    transition: color 0.3s;
}

.article-card h3 a:hover {
    color: #e74c3c;
}

.excerpt {
    color: #666;
    margin-bottom: 15px;
    line-height: 1.7;
}

.meta {
    color: #999;
    font-size: 13px;
}

.meta .date {
    margin-right: 15px;
}

/* 底部 */
.site-footer {
    background: #1a1a1a;
    color: #999;
    padding: 30px 0;
    text-align: center;
    margin-top: 60px;
}

.site-footer p {
    margin: 8px 0;
}

/* 响应式 */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        height: auto;
        padding: 15px;
    }
    
    .main-nav {
        margin-top: 15px;
    }
    
    .main-nav a {
        margin: 0 10px;
        font-size: 14px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .article-card h3 {
        font-size: 18px;
    }
}