/* 文章目录导航 */
.article-toc {
    position: sticky;
    top: 80px;
    margin-bottom: 2rem;
    background: #f8f9fa;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    z-index: 50;
    font-size: 0.9rem;
}

/* 教程目录导航样式 */
.tutorial-toc-widget {
    position: sticky;
    top: 80px;
}

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

.tutorial-toc-list .toc-item {
    margin-bottom: 8px;
}

.tutorial-toc-list .toc-h2 {
    padding-left: 0;
}

.tutorial-toc-list .toc-h3 {
    padding-left: 16px;
    font-size: 0.95em;
}

.tutorial-toc-list .toc-h4 {
    padding-left: 32px;
    font-size: 0.9em;
}

.tutorial-toc-list .toc-item a {
    display: block;
    padding: 6px 0;
    color: #495057;
    text-decoration: none;
    transition: all 0.2s;
    border-left: 2px solid transparent;
    padding-left: 8px;
    line-height: 1.4;
}

.tutorial-toc-list .toc-item a:hover {
    color: #0066cc;
    border-left-color: #0066cc;
}

.tutorial-toc-list .toc-item a.active {
    color: #0066cc;
    border-left-color: #0066cc;
    font-weight: 500;
}

/* 夜间模式样式 */
.dark-mode .tutorial-toc-widget {
    background-color: #1a1a1a !important;
    border-color: #333 !important;
}

.dark-mode .tutorial-toc-widget .card-header {
    background-color: #1a1a1a !important;
    border-color: #333 !important;
}

.dark-mode .tutorial-toc-list .toc-item a {
    color: #ccc;
}

.dark-mode .tutorial-toc-list .toc-item a:hover,
.dark-mode .tutorial-toc-list .toc-item a.active {
    color: #4dacff;
    border-left-color: #4dacff;
}

.dark-mode .article-toc {
    background: #2c3e50;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.toc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: #eaecef;
    border-bottom: 1px solid #e1e4e8;
}

.dark-mode .toc-header {
    background: #253446;
    border-bottom: 1px solid #34495e;
}

.toc-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: #24292e;
}

.dark-mode .toc-header h3 {
    color: #e6e6e6;
}

.toc-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: #586069;
    padding: 4px;
    font-size: 0.9rem;
    transition: transform 0.2s ease;
}

.dark-mode .toc-toggle {
    color: #a0aec0;
}

.toc-toggle:hover {
    color: #0366d6;
}

.dark-mode .toc-toggle:hover {
    color: #63b3ed;
}

.toc-toggle.collapsed {
    transform: rotate(180deg);
}

.toc-body {
    max-height: 400px;
    overflow-y: auto;
    transition: max-height 0.3s ease;
}

.toc-body.collapsed {
    max-height: 0;
}

.toc-nav {
    padding: 12px 0;
}

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

.toc-item {
    position: relative;
    padding: 0;
    margin: 0;
}

.toc-item a {
    display: block;
    padding: 6px 16px;
    padding-left: 24px;
    color: #586069;
    text-decoration: none;
    transition: all 0.2s;
    border-left: 2px solid transparent;
}

.dark-mode .toc-item a {
    color: #a0aec0;
}

.toc-item a:hover {
    color: #0366d6;
    background: rgba(3, 102, 214, 0.05);
}

.dark-mode .toc-item a:hover {
    color: #63b3ed;
    background: rgba(66, 153, 225, 0.05);
}

.toc-item a.active {
    color: #0366d6;
    border-left-color: #0366d6;
    font-weight: 600;
}

.dark-mode .toc-item a.active {
    color: #63b3ed;
    border-left-color: #63b3ed;
}

.toc-h3 {
    padding-left: 12px;
}

.toc-h3 a {
    padding-left: 36px;
    font-size: 0.9em;
}

.toc-h4 {
    padding-left: 24px;
}

.toc-h4 a {
    padding-left: 48px;
    font-size: 0.85em;
}

/* 滚动条样式 */
.toc-body::-webkit-scrollbar {
    width: 5px;
}

.toc-body::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.toc-body::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 5px;
}

.dark-mode .toc-body::-webkit-scrollbar-track {
    background: #2c3e50;
}

.dark-mode .toc-body::-webkit-scrollbar-thumb {
    background: #4a5568;
}

/* 阅读进度指示器 */
.reading-progress-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: transparent;
    z-index: 1000;
    pointer-events: none;
}

.reading-progress-bar {
    height: 100%;
    background: linear-gradient(to right, #4299e1, #667eea);
    width: 0%;
    transition: width 0.1s ease;
}

.dark-mode .reading-progress-bar {
    background: linear-gradient(to right, #63b3ed, #7f9cf5);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .article-toc {
        position: relative;
        top: 0;
        margin-bottom: 1.5rem;
    }
    
    .toc-body {
        max-height: 250px;
    }
}