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

 body {
     font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
     line-height: 1.6;
     color: #333;
     background: #f5f5f5;
 }

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

 nav {
     max-width: 1200px;
     margin: 0 auto;
     padding: 0 20px;
     height: 70px;
     display: flex;
     justify-content: space-between;
     align-items: center;
 }

 .logo {
    font-size: 24px;
    font-weight: bold;
    color: #2c3e50;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 40px;
    width: auto;
}

 .nav-links {
     display: flex;
     gap: 30px;
 }

 .nav-links a {
     text-decoration: none;
     color: #555;
     font-size: 16px;
     transition: color 0.3s;
 }

 .nav-links a:hover,
 .nav-links a.active {
     color: #3498db;
 }

 .nav-links a.active {
     font-weight: bold;
     position: relative;
 }

 .nav-links a.active::after {
     content: '';
     position: absolute;
     bottom: -5px;
     left: 0;
     width: 100%;
     height: 2px;
     background: #3498db;
 }

 main {
     max-width: 1200px;
     margin: 40px auto;
     padding: 0 20px;
     display: grid;
     grid-template-columns: 1fr 280px;
     gap: 30px;
 }

 .main-content {
     min-width: 0;
 }

 .sidebar {
     min-width: 0;
 }

 .sidebar-card {
    background: #fff;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    margin-bottom: 30px;
}

.sidebar-title {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #3498db;
}

.hot-article-list {
     list-style: none;
 }

 .hot-article-item {
     padding: 15px 0;
     border-bottom: 1px solid #eee;
 }

 .hot-article-item:last-child {
     border-bottom: none;
 }

 .hot-article-item a {
     text-decoration: none;
     color: #333;
     font-size: 15px;
     line-height: 1.5;
     display: block;
     transition: color 0.3s;
 }

 .hot-article-item a:hover {
     color: #3498db;
 }

 .hot-article-meta {
     display: flex;
     align-items: center;
     gap: 10px;
     margin-top: 8px;
 }

 .hot-article-tag {
     font-size: 11px;
     padding: 2px 8px;
     border-radius: 12px;
     color: #fff;
 }

 .hot-article-tag.geo {
     background: #3498db;
 }

 .hot-article-tag.seo {
     background: #27ae60;
 }

 .hot-article-date {
     font-size: 12px;
     color: #999;
 }

 .hot-article-rank {
     display: inline-flex;
     justify-content: center;
     align-items: center;
     width: 24px;
     height: 24px;
     background: #3498db;
     color: #fff;
     border-radius: 50%;
     font-size: 12px;
     font-weight: bold;
     margin-right: 10px;
 }

 .hot-article-rank.top1 {
     background: #e74c3c;
 }

 .hot-article-rank.top2 {
     background: #e67e22;
 }

 .hot-article-rank.top3 {
     background: #f39c12;
 }

 @media (max-width: 900px) {
     main {
         grid-template-columns: 1fr;
     }

     .sidebar {
         order: -1;
     }
 }

 .section-title {
    font-size: 28px;
    color: #2c3e50;
    margin-bottom: 30px;
    padding-bottom: 10px;
    border-bottom: 3px solid #3498db;
}

.article-grid {
     display: grid;
     grid-template-columns: 1fr;
     gap: 30px;
     margin-bottom: 50px;
 }

 .article-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    gap: 20px;
}

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

 .article-thumbnail {
     width: 280px;
     height: 180px;
     object-fit: cover;
     flex-shrink: 0;
 }

 .article-content {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

 .article-title {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 15px;
    line-height: 1.4;
}

.article-title h2 {
    font-size: inherit;
    color: inherit;
    margin: 0;
}

.article-title a {
    text-decoration: none;
    color: inherit;
}

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

 .article-excerpt {
    color: #666;
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

 .article-meta {
     display: flex;
     justify-content: space-between;
     align-items: center;
     flex-wrap: wrap;
     gap: 10px;
 }

 .article-tags {
     display: flex;
     gap: 10px;
 }

 .tag {
     display: inline-block;
     padding: 4px 12px;
     border-radius: 20px;
     font-size: 12px;
     font-weight: 500;
 }

 .tag-geo {
     background: #3498db;
     color: #fff;
 }

 .tag-seo {
     background: #27ae60;
     color: #fff;
 }

 .featured {
     background: #e74c3c;
     color: #fff;
 }

 .article-date {
     color: #888;
     font-size: 13px;
 }

 .pagination {
     display: flex;
     justify-content: center;
     align-items: center;
     gap: 10px;
     margin-top: 50px;
 }

 .pagination a,
 .pagination span {
     display: inline-flex;
     justify-content: center;
     align-items: center;
     width: 40px;
     height: 40px;
     border-radius: 5px;
     text-decoration: none;
     color: #555;
     font-size: 14px;
     transition: all 0.3s;
 }

 .pagination a:hover {
     background: #3498db;
     color: #fff;
 }

 .pagination .current {
     background: #3498db;
     color: #fff;
     font-weight: bold;
 }

 .pagination .prev,
 .pagination .next {
     width: auto;
     padding: 0 15px;
 }

 footer {
     background: #2c3e50;
     color: #fff;
     text-align: center;
     padding: 25px 20px;
     margin-top: 40px;
 }

 footer p {
     margin-bottom: 8px;
     font-size: 13px;
 }

 .footer-nav {
     margin-top: 15px;
     display: flex;
     justify-content: center;
     gap: 20px;
 }

 .footer-nav a {
     color: #ecf0f1;
     text-decoration: none;
     font-size: 13px;
     transition: color 0.3s;
 }

 .footer-nav a:hover {
     color: #3498db;
 }

 .footer-qrcode {
     text-align: center;
     margin-top: 15px;
     padding: 10px;
     background: rgba(255, 255, 255, 0.08);
     border-radius: 6px;
 }

 .qrcode-img {
     width: 100px;
     height: 100px;
     object-fit: contain;
     border-radius: 4px;
 }

 .footer-qrcode p {
     margin: 8px 0 0 0;
     font-size: 12px;
     color: #ecf0f1;
 }

 @media (max-width: 768px) {
     .nav-links {
         display: none;
     }

     .article-grid {
         grid-template-columns: 1fr;
     }

     .article-card {
         flex-direction: column;
     }

     .article-thumbnail {
         width: 100%;
         height: 200px;
     }
 }