/**
 * 文章目录样式
 */

/* 目录容器 */
#article-toc {
    position: fixed;
    left: 0;
    top: 120px;
    width: 280px;
    max-height: calc(100vh - 150px);
    overflow-y: auto;
    background: #fff;
    border-right: 1px solid #e5e5e5;
    border-bottom: 1px solid #e5e5e5;
    border-radius: 0 0 8px 0;
    padding: 20px;
    box-shadow: 2px 2px 12px rgba(0, 0, 0, 0.08);
    z-index: 100;
}

/* 目录标题 */
#article-toc .toc-title {
    font-size: 15px;
    font-weight: bold;
    color: #333;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 目录列表 */
#article-toc .toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

#article-toc ul {
    list-style: none;
    padding-left: 0;
    margin: 0;
}

/* 嵌套列表缩进 */
#article-toc ul ul {
    padding-left: 16px;
}

/* 目录项 */
#article-toc .toc-item {
    margin: 0;
    padding: 0;
}

/* 目录链接 */
#article-toc .toc-link {
    display: block;
    padding: 6px 10px;
    color: #666;
    text-decoration: none;
    font-size: 14px;
    line-height: 1.6;
    border-radius: 4px;
    transition: all 0.2s ease;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#article-toc .toc-link:hover {
    background: #f5f5f5;
    color: #333;
}

/* 激活状态 */
#article-toc .toc-link.active {
    background: #e8f4ff;
    color: #1890ff;
    font-weight: 500;
}

/* 不同层级的样式 */
#article-toc .toc-level-1 .toc-link {
    font-weight: 500;
    font-size: 15px;
}

#article-toc .toc-level-2 .toc-link {
    font-size: 14px;
}

#article-toc .toc-level-3 .toc-link {
    font-size: 13px;
    color: #888;
}

#article-toc .toc-level-4 .toc-link,
#article-toc .toc-level-5 .toc-link,
#article-toc .toc-level-6 .toc-link {
    font-size: 12px;
    color: #999;
}

/* 滚动条样式 */
#article-toc::-webkit-scrollbar {
    width: 6px;
}

#article-toc::-webkit-scrollbar-thumb {
    background: #ddd;
    border-radius: 3px;
}

#article-toc::-webkit-scrollbar-thumb:hover {
    background: #ccc;
}

/* 响应式设计 - 平板 */
@media (max-width: 1400px) {
    #article-toc {
        width: 240px;
        font-size: 13px;
    }
}

/* 响应式设计 - 小屏幕隐藏 */
@media (max-width: 1200px) {
    #article-toc {
        display: none;
    }
}

/* 移动端显示按钮版本 */
@media (max-width: 768px) {
    #article-toc {
        display: none;
    }
}

/* 空目录时隐藏 */
#article-toc:empty {
    display: none;
}