/**
 * Articles.css - 文章列表页样式
 * 包含页面头部、文章卡片、侧边栏、分页等样式
 */

/* ========== 页面头部 ========== */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 6rem 0 4rem;
    color: #fff;
    text-align: center;
    margin-bottom: 4rem;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.25rem;
    opacity: 0.9;
}

.breadcrumb-custom {
    background: transparent;
    padding: 0;
    margin-top: 1.5rem;
    justify-content: center;
}

.breadcrumb-custom .breadcrumb-item {
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb-custom .breadcrumb-item.active {
    color: #fff;
}

.breadcrumb-custom .breadcrumb-item + .breadcrumb-item::before {
    color: rgba(255, 255, 255, 0.5);
}

.breadcrumb-custom a {
    color: #fff;
    text-decoration: none;
}

.breadcrumb-custom a:hover {
    text-decoration: underline;
}

/* ========== 文章列表 ========== */
.article-list {
    margin-bottom: 3rem;
}

.article-card {
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    margin-bottom: 2rem;
    border: 1px solid #e2e8f0;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
}

.article-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.article-content {
    padding: 2rem;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    color: #64748b;
    font-size: 0.9rem;
}

.article-meta i {
    margin-right: 0.25rem;
}

.article-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

.article-card h3 a {
    color: #1e293b;
    text-decoration: none;
    transition: color 0.3s ease;
}

.article-card h3 a:hover {
    color: #667eea;
}

.article-summary {
    color: #64748b;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.article-tags {
    margin-bottom: 1rem;
}

.article-tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: #f1f5f9;
    border-radius: 15px;
    font-size: 0.85rem;
    color: #667eea;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
    text-decoration: none;
    transition: all 0.3s ease;
}

.article-tag:hover {
    background: #667eea;
    color: #fff;
}

.read-more {
    color: #667eea;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    transition: all 0.3s ease;
}

.read-more:hover {
    gap: 0.5rem;
}

.read-more i {
    margin-left: 0.5rem;
    transition: margin-left 0.3s ease;
}

.read-more:hover i {
    margin-left: 1rem;
}

/* ========== 侧边栏 ========== */
.sidebar-card {
    background: #fff;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 2rem;
    border: 1px solid #e2e8f0;
}

.sidebar-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #1e293b;
}

/* 侧边栏组件 */
.sidebar-widget {
    background: #fff;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 2rem;
    border: 1px solid #e2e8f0;
}

.widget-header {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid #f1f5f9;
}

.widget-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e293b;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.widget-header i {
    color: #667eea;
}

/* 分类列表 */
.category-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.category-list li {
    margin-bottom: 0.75rem;
}

.category-list a,
.category-item {
    color: #64748b;
    text-decoration: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.category-list a:hover,
.category-item:hover {
    color: #667eea;
    background: #f8f9fc;
}

.category-item.active {
    color: #667eea;
    background: #f1f5f9;
    font-weight: 500;
}

.category-count {
    background: #f1f5f9;
    padding: 0.2rem 0.6rem;
    border-radius: 10px;
    font-size: 0.85rem;
    color: #64748b;
}

/* 标签云 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-cloud a {
    padding: 0.5rem 1rem;
    background: #f1f5f9;
    border-radius: 20px;
    color: #64748b;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.tag-cloud a:hover {
    background: #667eea;
    color: #fff;
    transform: translateY(-2px);
}

/* 热门标签热度等级 */
.tag-item {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: #f1f5f9;
    border-radius: 20px;
    color: #64748b;
    text-decoration: none;
    transition: all 0.3s ease;
    margin: 0.25rem;
}

.tag-level-1 {
    font-size: 0.85rem;
    opacity: 0.7;
}

.tag-level-2 {
    font-size: 0.9rem;
    opacity: 0.8;
}

.tag-level-3 {
    font-size: 1rem;
    opacity: 0.9;
}

.tag-level-4 {
    font-size: 1.1rem;
    font-weight: 500;
    opacity: 1;
}

.tag-level-5 {
    font-size: 1.2rem;
    font-weight: 600;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff !important;
    opacity: 1;
}

.tag-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* 排行榜 */
.rank-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.rank-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 10px;
    transition: all 0.3s ease;
}

.rank-item:hover {
    background: #f8f9fc;
}

.rank-num {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
}

.rank-top {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.rank-normal {
    background: #f1f5f9;
    color: #64748b;
}

.rank-title {
    flex: 1;
    color: #1e293b;
    text-decoration: none;
    font-size: 0.95rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: color 0.3s ease;
}

.rank-title:hover {
    color: #667eea;
}

.rank-count {
    flex-shrink: 0;
    color: #94a3b8;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* 分类/标签/专题信息 */
.category-info {
    color: #64748b;
}

.info-stats {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-label {
    font-size: 0.85rem;
    color: #94a3b8;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 600;
    color: #667eea;
}

/* 推荐文章列表 */
.recommend-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.recommend-item {
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.recommend-link {
    display: flex;
    gap: 1rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.recommend-link:hover {
    background: #f8f9fc;
}

.recommend-thumb {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 10px;
    flex-shrink: 0;
}

.recommend-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.5rem;
}

.recommend-info h5 {
    font-size: 0.95rem;
    font-weight: 500;
    color: #1e293b;
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.recommend-link:hover h5 {
    color: #667eea;
}

.recommend-meta {
    display: flex;
    gap: 1rem;
    color: #94a3b8;
    font-size: 0.85rem;
}

.recommend-meta i {
    margin-right: 0.25rem;
}

/* 随机图片 */
.random-images {
    margin-top: 1rem;
}

.random-img-item {
    display: block;
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.random-img-item:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.random-img-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
}

/* 侧边广告 */
.sidebar-ad {
    display: block;
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.sidebar-ad:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.sidebar-ad img {
    width: 100%;
    height: auto;
    display: block;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 2rem 1rem;
    color: #94a3b8;
}

.empty-state p {
    margin: 0;
    font-size: 0.95rem;
}

/* ========== 分页 ========== */
.pagination-custom {
    margin-top: 3rem;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.pagination-custom .page-item .page-link {
    border: none;
    border-radius: 10px;
    padding: 0.75rem 1.25rem;
    color: #64748b;
    transition: all 0.3s ease;
}

.pagination-custom .page-item.active .page-link {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.pagination-custom .page-item .page-link:hover {
    background: #f1f5f9;
    color: #667eea;
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .page-header h1 {
        font-size: 2rem;
    }

    .article-image {
        height: 200px;
    }
}