@charset "utf-8";

/* 主内容区布局样式 */
.main-content {
    display: flex;
    gap: 30px;
    margin-bottom: 50px;
}

.content-section {
    flex: 1; /* 内容区占满剩余空间 */
}

.sidebar {
    width: var(--sidebar-width); /* 使用CSS变量定义侧边栏宽度 */
    display: flex;
    flex-direction: column;
    gap: 30px;
    position: relative;
    height: auto;
}

/* 列表页通用样式 */

/* 分类筛选区 */
.category-filter {
    background: white;
    border-radius: 10px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: var(--shadow);
}

.filter-title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--dark);
    display: flex;
    align-items: center;
}

.filter-title i {
    margin-right: 10px;
    color: var(--secondary);
}

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

.filter-tag {
    padding: 6px 15px;
    background: var(--light-gray);
    border-radius: 20px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-tag:hover, .filter-tag.active {
    background: var(--primary);
    color: white;
}

/* 文章列表容器 */
.article-list {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    margin-bottom: 40px;
}

.list-header {
    background: var(--primary);
    color: white;
    padding: 15px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.list-header h2 {
    font-size: 1.4rem;
}

.sort-options {
    display: flex;
    gap: 10px;
}

.sort-tab {
    padding: 5px 15px;
    border-radius: 20px;
    background: rgba(255,255,255,0.1);
    color: white;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.sort-tab:hover, .sort-tab.active {
    background: rgba(255,255,255,0.3);
}

.sort-options select {
    padding: 5px 10px;
    border-radius: 5px;
    border: 1px solid rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.1);
    color: white;
}

.sort-options select:focus {
    outline: none;
}

/* 列表项样式 */
.list-item {
    padding: 25px;
    border-bottom: 1px solid var(--light-gray);
    display: flex;
    gap: 20px;
    transition: var(--transition);
}

.list-item:hover {
    background-color: #f9f9f9;
}

.list-item-img {
    flex: 0 0 250px; /* 固定图片宽度 */
    height: 150px;
    border-radius: 8px;
    overflow: hidden;
}

.list-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.list-item:hover .list-item-img img {
    transform: scale(1.05); /* 悬停时图片缩放效果 */
}

.list-item-content {
    flex: 1; /* 内容区自适应剩余空间 */
}

.list-item-meta {
    display: flex;
    gap: 15px;
    margin-bottom: 10px;
    font-size: 0.85rem;
    color: var(--gray);
}

.list-item-tag {
    background: var(--light-gray);
    color: var(--primary);
    padding: 3px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
}

.list-item-title {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--dark);
    font-weight: 600;
    transition: var(--transition);
}

.list-item-title:hover {
    color: var(--primary);
}

.list-item-desc {
    color: var(--gray);
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2; /* 最多显示2行文字 */
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.list-item-footer {
    display: flex;
    justify-content: space-between;
    color: var(--gray);
    font-size: 0.85rem;
}

.list-item-stats {
    display: flex;
    gap: 15px;
}

.list-item-stats span {
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 分页样式 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin: 30px 0;
}

.page-item {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: white;
    color: var(--dark);
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.page-item:hover, .page-item.active {
    background: var(--primary);
    color: white;
}

.page-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 分隔线样式 */
.divider {
    position: relative;
    height: 1px;
    background: var(--light-gray);
    margin: 30px 0;
    text-align: center;
}

.divider:after {
    content: "♦"; /* 分隔线中间符号 */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #f5f7fa;
    padding: 0 15px;
    color: var(--secondary);
    font-size: 1.2rem;
}

/* 专题网格布局 */
.topic-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr); /* 2列网格布局 */
    gap: 15px;
}

.topic-card {
    background: var(--light);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.topic-card:hover,
.topic-card:focus-within {
    transform: translateY(-3px); /* 悬停时向上浮动效果 */
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.topic-img {
    height: 100px;
    overflow: hidden;
}

.topic-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

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

.topic-content {
    padding: 12px;
    flex: 1;
}

.topic-title {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--dark);
}

.topic-desc {
    font-size: 0.8rem;
    color: var(--gray);
}

/* 响应式布局 */
@media (max-width: 992px) {
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-links,
    .user-actions {
        display: none;
    }
    
    .sidebar {
        display: none; /* 中等屏幕隐藏侧边栏 */
    }
    
    .main-content {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .list-item {
        flex-direction: column;
    }
    
    .list-item-img {
        flex: 0 0 auto;
        width: 100%;
    }
     .list-item-desc{ display:none;}
    .list-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .sort-options {
        flex-wrap: wrap;
        justify-content: flex-start;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
}

/* 分类切换样式 */
.category-content {
    display: none; /* 默认隐藏分类内容 */
}

.category-content.active {
    display: block; /* 激活时显示对应分类内容 */
}