/* Table of Contents (TOC) 样式 - 简化版 */
.table-of-contents {
    background: #f8f9fa;
    border-left: 3px solid #007bff;
    padding: 15px 20px;
    margin: 20px 0 30px 0;
    border-radius: 4px;
}

.toc-header {
    margin-bottom: 12px;
}

.toc-title {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

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

.toc-item {
    margin: 0;
    line-height: 1.8;
}

.toc-link {
    display: inline-block;
    color: #555;
    text-decoration: none;
    transition: color 0.2s ease;
    font-size: 14px;
}

.toc-link:hover {
    color: #007bff;
    text-decoration: underline;
}

.toc-link.active {
    color: #007bff;
    font-weight: 500;
}

/* 简单的层级缩进 */
.toc-level-2 .toc-link {
    font-weight: 500;
    color: #333;
}

.toc-level-3 {
    padding-left: 20px;
}

.toc-level-3 .toc-link {
    font-size: 13px;
}

.toc-level-4 {
    padding-left: 40px;
}

.toc-level-4 .toc-link {
    font-size: 12px;
    color: #666;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .table-of-contents {
        margin: 15px 0 20px 0;
        padding: 12px 15px;
    }
    
    .toc-title {
        font-size: 15px;
    }
    
    .toc-link {
        font-size: 13px;
    }
    
    .toc-level-3 {
        padding-left: 15px;
    }
    
    .toc-level-4 {
        padding-left: 30px;
    }
}

/* 文章内容中的标题锚点样式 */
.article-content h2,
.article-content h3,
.article-content h4 {
    scroll-margin-top: 80px;
}

.article-content h2:target,
.article-content h3:target,
.article-content h4:target {
    background-color: #fff3cd;
    padding: 5px 10px;
    margin-left: -10px;
    border-radius: 3px;
}