/* 文章目录样式 */
.toc-container {
    background: #ffffff;
    border: 1px solid var(--win7-border);
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.toc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: linear-gradient(to bottom, #f9f9f9, #ececec);
    border-bottom: 1px solid var(--win7-border);
    cursor: pointer;
}

.toc-title {
    font-weight: 600;
    color: var(--win7-text);
    font-size: 14px;
}

.toc-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toc-toggle:hover {
    background: rgba(0, 0, 0, 0.05);
}

.toc-toggle-icon {
    font-size: 24px;
    color: #666;
    transition: transform 0.2s;
}

.toc-toggle-icon.collapsed {
    transform: rotate(-90deg);
    /* 逆时针旋转90度表示折叠状态 */
}

.toc-nav {
    max-height: 500px;
    overflow-y: auto;
    transition: max-height 0.3s ease;
}

.toc-nav.collapsed {
    max-height: 0;
    overflow: hidden;
}

.toc-list {
    list-style: none;
    margin: 10px 0 30px 0;
    padding: 0;
}

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

.toc-item {
    border-bottom: 1px solid #f0f0f0;
}

.toc-item:last-child {
    border-bottom: none;
}

.toc-link {
    display: block;
    padding: 8px 16px;
    color: var(--win7-text);
    text-decoration: none;
    font-size: 13px;
    line-height: 1.4;
    transition: all 0.2s;
    cursor: pointer;
    position: relative;
}

.toc-link:hover {
    background: #f5f9ff;
    color: var(--win7-blue);
}

.toc-link.active {
    background: #e6f3ff;
    color: var(--win7-blue);
    border-left: 3px solid var(--win7-blue);
    padding-left: 13px;
}

.toc-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--win7-blue);
}

/* 子级目录缩进 */
.toc-list ul .toc-link {
    padding-left: 32px;
    font-size: 12px;
}

.toc-list ul ul .toc-link {
    padding-left: 48px;
}

.toc-list ul ul ul .toc-link {
    padding-left: 64px;
}