/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f7fafc;
    scroll-behavior: smooth;
}

/* 链接全局样式 */
a {
    text-decoration: none;
    color: inherit;
}

/* 列表全局样式 */
ul, ol {
    list-style: none;
}

/* 图片全局样式 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

/* 头部 */
.site-header {
    background: #1a202c;
    color: white;
    padding: 16px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
    margin-bottom: 30px;
    position: sticky;
    top: 0;
    z-index: 9999;
    transition: all 0.3s ease;
}

.site-header.scrolled {
    padding: 12px 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    background: rgba(26, 32, 44, 0.98);
    backdrop-filter: blur(10px);
}

.header-content {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: white;
    letter-spacing: -0.5px;
}

.logo h1 a {
    color: white;
    text-decoration: none;
}

.logo p {
    font-size: 0.9rem;
    opacity: 0.9;
    font-weight: 300;
    color: white;
}

/* 导航 */
.nav-wrapper {
    display: flex;
    align-items: center;
    gap: 30px;
}

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    list-style: none;
    padding: 0;
    margin: 0;
}

.main-nav ul li {
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav a {
    color: #e2e8f0;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 10px 14px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    background: rgba(102, 126, 234, 0.15);
    color: #667eea;
}

/* 搜索框 */
.search-box {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.1);
    border-radius: 8px;
    padding: 8px 12px;
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s ease;
}

.search-box input {
    background: transparent;
    border: none;
    outline: none;
    color: white;
    padding: 4px 8px;
    font-size: 0.9rem;
    width: 160px;
}

.search-box input::placeholder {
    color: rgba(255,255,255,0.6);
}

.search-box:focus-within {
    background: rgba(255,255,255,0.15);
    border-color: #667eea;
    width: 200px;
}

.search-btn {
    background: transparent;
    border: none;
    color: rgba(255,255,255,0.7);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.search-btn:hover {
    color: #667eea;
}

/* 广告样式 */
.ad-label {
    font-size: 0.75rem;
    color: #6c757d;
    text-align: center;
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ad-top-banner {
    text-align: center;
    margin-bottom: 30px;
    padding: 10px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.ad-top-banner > div {
    margin: 0 auto;
    max-width: 728px;
}

.ad-in-content {
    text-align: center;
    margin: 40px 0;
    padding: 15px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.ad-in-content > div {
    margin: 0 auto;
}

.ad-in-article {
    text-align: center;
    margin: 40px 0;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
}

.ad-in-article > div {
    margin: 0 auto;
}

.ad-bottom-banner {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    padding: 8px;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    z-index: 1000;
    text-align: center;
}

.ad-bottom-banner > div {
    margin: 0 auto;
    max-width: 320px;
}

.ad-widget {
    text-align: center;
    padding: 10px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

/* 主内容区布局 */
.main-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.content-wrapper {
    order: 2;
}

.sidebar {
    order: 1;
}

@media (min-width: 992px) {
    .main-container {
        grid-template-columns: 1fr 320px;
    }
    .content-wrapper {
        order: 1;
    }
    .sidebar {
        order: 2;
    }
}

/* 首页精选内容 */
.featured-section h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #2d3748;
    border-left: 4px solid #667eea;
    padding-left: 15px;
}

.featured-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 40px;
}

@media (min-width: 768px) {
    .featured-grid {
        grid-template-columns: 2fr 1fr;
    }
}

.featured-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04), 0 8px 16px rgba(0,0,0,0.06);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 1px solid rgba(0,0,0,0.05);
}

.featured-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08), 0 20px 40px rgba(0,0,0,0.12);
}

.featured-card.large {
    grid-row: span 2;
}

.featured-small {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.featured-image {
    position: relative;
    overflow: hidden;
}

.featured-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0) 50%, rgba(0,0,0,0.3) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.featured-card:hover .featured-image::after {
    opacity: 1;
}

.featured-image img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.featured-card:hover .featured-image img {
    transform: scale(1.05);
}

.featured-card.large .featured-image img {
    height: 300px;
}

.featured-content {
    padding: 20px;
}

.featured-content .category {
    display: inline-block;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.featured-content h3,
.featured-content h4 {
    margin-bottom: 10px;
    line-height: 1.4;
}

.featured-content h3 a,
.featured-content h4 a {
    color: #2d3748;
    text-decoration: none;
    font-weight: 700;
}

.featured-content h3 {
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -0.3px;
}

.featured-content h4 {
    font-size: 1.1rem;
}

.featured-content p {
    color: #718096;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.meta {
    display: flex;
    gap: 15px;
    font-size: 0.85rem;
    color: #a0aec0;
    flex-wrap: wrap;
}

.meta .views {
    margin-left: auto;
}

/* 首页文章列表 */
.latest-articles h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #2d3748;
    border-left: 4px solid #667eea;
    padding-left: 15px;
}

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 25px;
    margin-bottom: 30px;
}

@media (min-width: 768px) {
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.article-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04), 0 6px 12px rgba(0,0,0,0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 1px solid rgba(0,0,0,0.05);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.06), 0 16px 32px rgba(0,0,0,0.1);
}

.article-image img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-content {
    padding: 20px;
}

.article-content .category {
    display: inline-block;
    background: #e2e8f0;
    color: #4a5568;
    padding: 3px 10px;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 10px;
}

.article-content h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
    line-height: 1.4;
}

.article-content h3 a {
    color: #2d3748;
    text-decoration: none;
    font-weight: 600;
}

.article-content p {
    color: #718096;
    margin-bottom: 15px;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
    flex-wrap: wrap;
}

.page-btn {
    display: inline-block;
    padding: 12px 18px;
    background: white;
    color: #4a5568;
    text-decoration: none;
    border-radius: 8px;
    border: 1px solid #e2e8f0;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.page-btn:hover,
.page-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: #667eea;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* 侧边栏组件 */
.widget {
    background: white;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04), 0 6px 12px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.widget:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.06), 0 16px 32px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

.widget h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #2d3748;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 10px;
}

.category-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-list li {
    margin-bottom: 12px;
    list-style: none;
}

.category-list li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #4a5568;
    text-decoration: none;
    padding: 8px 0;
    border-bottom: 1px solid #f7fafc;
    transition: color 0.3s ease;
}

.category-list li a:hover {
    color: #667eea;
}

.category-list .count {
    background: #e2e8f0;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.popular-list {
    list-style: none;
    counter-reset: rank;
    padding: 0;
    margin: 0;
}

.popular-list li {
    display: flex;
    gap: 12px;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #f7fafc;
    list-style: none;
}

.popular-list li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.popular-list .rank {
    counter-increment: rank;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}

.popular-list li:nth-child(n+4) .rank {
    background: #cbd5e0;
    color: #4a5568;
}

.popular-list a {
    color: #4a5568;
    text-decoration: none;
    font-size: 0.95rem;
    line-height: 1.5;
    transition: color 0.3s ease;
}

.popular-list a:hover {
    color: #667eea;
}

.comment-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.comment-list li {
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #f7fafc;
    font-size: 0.9rem;
    list-style: none;
}

.comment-list li:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.comment-list strong {
    color: #2d3748;
    font-size: 0.85rem;
}

.comment-list a {
    color: #667eea;
    text-decoration: none;
}

.comment-list p {
    color: #718096;
    margin-top: 5px;
    font-size: 0.85rem;
    line-height: 1.5;
}

/* 分类页 */
.category-header {
    background: white;
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.category-header h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #2d3748;
}

.category-header p {
    color: #718096;
    font-size: 1.1rem;
}

.articles-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.article-item {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 25px;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.04), 0 6px 12px rgba(0,0,0,0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0,0,0,0.05);
}

.article-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.06), 0 16px 32px rgba(0,0,0,0.1);
}

.article-item-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-item:hover .article-item-image img {
    transform: scale(1.05);
}

.article-item-content {
    padding: 25px;
}

.article-item-content .category {
    display: inline-block;
    background: #e2e8f0;
    color: #4a5568;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.article-item-content .category.rating {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.article-item-content h2 {
    margin-bottom: 12px;
    font-size: 1.4rem;
    line-height: 1.4;
}

.article-item-content h2 a {
    color: #2d3748;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.article-item-content h2 a:hover {
    color: #667eea;
}

.article-item-content .excerpt {
    color: #718096;
    line-height: 1.7;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

/* 文章详情页 */
.article-detail {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.article-header {
    margin-bottom: 30px;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 30px;
}

.article-header h1 {
    font-size: 2.2rem;
    line-height: 1.3;
    margin-bottom: 15px;
    color: #2d3748;
}

.article-meta {
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
    color: #718096;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.article-cover img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    margin-bottom: 10px;
}

.article-content {
    font-size: 1.05rem;
    line-height: 1.9;
    color: #4a5568;
}

.article-content p {
    margin-bottom: 20px;
}

.article-content h2 {
    font-size: 1.6rem;
    margin: 35px 0 15px;
    color: #2d3748;
    border-left: 4px solid #667eea;
    padding-left: 15px;
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: -0.2px;
}

.article-content h3 {
    font-size: 1.3rem;
    margin: 30px 0 12px;
    color: #2d3748;
}

.article-footer {
    margin: 40px 0;
    padding: 20px 0;
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

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

.article-tags .tag {
    background: #e2e8f0;
    color: #4a5568;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.article-share {
    display: flex;
    align-items: center;
    gap: 10px;
}

.share-btn {
    background: #667eea;
    color: white;
    padding: 6px 12px;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.85rem;
    transition: background 0.3s ease;
}

.share-btn:hover {
    background: #5a67d8;
}

.related-articles {
    margin-top: 40px;
}

.related-articles h3 {
    font-size: 1.4rem;
    margin-bottom: 20px;
    color: #2d3748;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.related-item {
    transition: transform 0.3s ease;
}

.related-item:hover {
    transform: translateY(-3px);
}

.related-item img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    border-radius: 6px;
    margin-bottom: 10px;
}

.related-item h4 {
    font-size: 1rem;
    line-height: 1.5;
}

.related-item h4 a {
    color: #4a5568;
    text-decoration: none;
    transition: color 0.3s ease;
}

.related-item h4 a:hover {
    color: #667eea;
}

/* 单页内容 */
.page-content {
    background: white;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.page-content h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #2d3748;
    border-bottom: 2px solid #e2e8f0;
    padding-bottom: 15px;
}

.update-date,
.effective-date {
    color: #718096;
    font-size: 0.9rem;
    margin-bottom: 10px;
}

.content-block {
    margin-bottom: 35px;
}

.content-block h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: #2d3748;
    border-left: 4px solid #667eea;
    padding-left: 15px;
}

.content-block h4 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: #4a5568;
    margin-top: 20px;
}

.content-block p {
    color: #4a5568;
    line-height: 1.8;
    margin-bottom: 15px;
    font-size: 1rem;
}

.content-block ul,
.content-block ol {
    margin-left: 25px;
    margin-bottom: 15px;
}

.content-block ul li {
    list-style: disc;
    margin-left: 20px;
    padding-left: 5px;
    margin-bottom: 10px;
    color: #4a5568;
    line-height: 1.8;
    font-size: 1rem;
}

.content-block ol li {
    list-style: decimal;
    margin-left: 20px;
    padding-left: 5px;
    margin-bottom: 10px;
    color: #4a5568;
    line-height: 1.8;
    font-size: 1rem;
}

.content-block strong {
    color: #2d3748;
    font-weight: 600;
}

/* 底部 */
.site-footer {
    background: #2d3748;
    color: white;
    padding: 50px 0 20px;
    margin-top: 80px;
    padding-bottom: 80px; /* 避免底部广告遮挡 */
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-about h4,
.footer-links h4,
.footer-contact h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: white;
}

.footer-about p {
    color: #cbd5e0;
    line-height: 1.7;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.footer-links ul,
.footer-contact ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li,
.footer-contact li {
    margin-bottom: 10px;
    color: #cbd5e0;
    font-size: 0.95rem;
    list-style: none;
}

.footer-links a {
    color: #cbd5e0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #667eea;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 20px;
    text-align: center;
    color: #a0aec0;
    font-size: 0.85rem;
}

.footer-bottom p {
    margin-bottom: 8px;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

/* 移动端适配 */
@media (max-width: 1024px) {
    .header-content {
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }
    
    .nav-wrapper {
        grid-column: span 2;
        justify-content: space-between;
    }
}

@media (max-width: 768px) {
    .header-content {
        grid-template-columns: 1fr;
        gap: 15px;
        text-align: center;
    }
    
    .nav-wrapper {
        flex-direction: column;
        gap: 15px;
    }
    
    .search-box {
        width: 100%;
        max-width: 280px;
    }
    
    .search-box input {
        width: 100%;
    }
    
    .main-nav ul {
        justify-content: center;
        gap: 5px;
    }
    
    .featured-card.large .featured-image img {
        height: 200px;
    }
    
    .featured-content h3 {
        font-size: 1.2rem;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .site-footer {
        padding: 30px 0 70px;
    }
    
    .page-content {
        padding: 20px;
    }
    
    .page-content h2 {
        font-size: 1.5rem;
    }
    
    .content-block h3 {
        font-size: 1.2rem;
    }
    
    .category-header {
        padding: 20px;
    }
    
    .category-header h1 {
        font-size: 1.5rem;
    }
    
    .article-item {
        grid-template-columns: 1fr;
    }
    
    .article-item-image img {
        height: 180px;
    }
    
    .article-item-content {
        padding: 20px;
    }
    
    .article-item-content h2 {
        font-size: 1.2rem;
    }
    
    .article-detail {
        padding: 20px;
    }
    
    .article-header h1 {
        font-size: 1.6rem;
    }
    
    .article-meta {
        gap: 12px;
        font-size: 0.85rem;
    }
    
    .article-content {
        font-size: 1rem;
    }
    
    .article-content h2 {
        font-size: 1.3rem;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .back-to-top {
        right: 20px;
        bottom: 80px;
        width: 45px;
        height: 45px;
    }
}