/* ===== 桌面端目录样式 ===== */
.toc {
    height: 80vh;
    position: fixed;
    top: 50%;
    left: 3%;
    width: 16%;
    transform: translateY(-50%);
    background-color: #f8f8f8;
    border-radius: 8px;
    padding: 1.5rem 0;
    font-size: 13px;
    overflow: auto !important;
    white-space: nowrap;
    text-overflow: ellipsis;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border: 1px solid #eaeaea;
    z-index: 100;
}

/* 移动端目录触发按钮 */
.mobile-toc-toggle {
    display: none;
    position: fixed;
    bottom: 220px;
    right: 20px;
    z-index: 1000;
    border: none;
    border-radius: 50px;
    padding: 12px 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.mobile-toc-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

/* 移动端遮罩层 */
.mobile-toc-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.mobile-toc-overlay.active {
    display: block;
    opacity: 1;
}

/* 目录头部（包含关闭按钮） */
.toc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 1.5rem 1.2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e0e0e0;
}

.toc .page-header {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark-color);
}

.toc-close {
    display: none;
    background: none;
    border: none;
    color: #666;
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.toc-close:hover {
    background: #e0e0e0;
    color: #333;
}

/* 移动端目录样式 */
@media screen and (max-width: 1450px) {
    .toc {
        display: block;
        position: fixed;
        top: 0;
        left: -100%;
        width: 85%;
        max-width: 320px;
        height: 100vh;
        transform: none;
        border-radius: 0;
        border-right: 1px solid #eaeaea;
        transition: left 0.3s ease;
        z-index: 999;
        padding-top: 60px;
    }

    .toc.mobile-active {
        left: 0;
    }

    .mobile-toc-toggle {
        display: flex;
    }

    .toc-close {
        display: block;
    }

    /* 移动端目录内容调整 */
    .toc-nav {
        padding: 0 1rem;
    }

    .toc-nav .nav-link {
        white-space: normal;
        line-height: 1.5;
        padding: 0.8rem 1rem;
        font-size: 1rem;
    }

    .toc-nav ul ul .nav-link {
        padding-left: 2rem;
        font-size: 0.95rem;
    }

    .toc-nav ul ul ul .nav-link {
        padding-left: 3rem;
        font-size: 0.9rem;
    }

    /* 防止背景滚动 */
    body.toc-open {
        overflow: hidden;
    }
}

/* 超大屏幕优化 */
@media screen and (min-width: 1800px) {
    .toc {
        font-size: 14px;
        width: 14%;
        left: 5%;
    }
}

/* 中等屏幕优化 */
@media screen and (min-width: 1450px) and (max-width: 1799px) {
    .toc {
        width: 18%;
        left: 2%;
    }
}

/* 目录滚动条样式 */
.toc::-webkit-scrollbar {
    width: 6px;
    height: 1px;
}

.toc::-webkit-scrollbar-thumb {
    border-radius: 4px;
    background-color: #aaa;
}

.toc::-webkit-scrollbar-track {
    border-radius: 4px;
    background: #f0f0f0;
}

/* 目录导航 */
.toc-nav ul {
    overflow: hidden;
    white-space: nowrap;
    line-height: 1.4;
    margin: 0;
    padding: 0;
    list-style: none;
}

.toc-nav ul ul {
    margin-left: 0.8rem;
}

/* 忽略h1标题的缩进 */
.toc-nav ul ul ul {
    margin-left: 0.8rem;
}

/* 目录链接 */
.toc-nav .nav-link {
    text-overflow: ellipsis;
    overflow: hidden;
    color: #555;
    padding: 0.4rem 1.5rem;
    display: block;
    transition: all 0.2s ease;
    border-left: 2px solid transparent;
    font-size: 0.9rem;
}

.toc-nav .nav-link:hover {
    background-color: #f0f0f0;
    border-left-color: #ccc;
}

/* 激活状态 */
.toc-nav li.active .nav-link {
    background-color: #f0f0f0;
    font-weight: 500;
}

/* 不同层级的不同样式 */
.toc-nav > ul > li > .nav-link {
    font-weight: 600;
    color: #333;
}

.toc-nav ul ul .nav-link {
    font-size: 0.85rem;
    padding-left: 2rem;
}

.toc-nav ul ul ul .nav-link {
    padding-left: 2.8rem;
    color: #666;
    font-size: 0.8rem;
}

/* 黑暗模式支持 */
.darkmode--activated .toc {
    background-color: #2a2a2a;
    border-color: #444;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.darkmode--activated .toc .page-header {
    color: #e0e0e0;
    border-bottom-color: #444;
}

.darkmode--activated .toc-nav .nav-link {
    color: #b0b0b0;
}

.darkmode--activated .toc-nav .nav-link:hover {
    color: #ffffff;
    background-color: #3a3a3a;
}

.darkmode--activated .toc-nav li.active .nav-link {
    background-color: #3a3a3a;
    color: #ffffff;
}

.darkmode--activated .toc-nav > ul > li > .nav-link {
    color: #d0d0d0;
}

.darkmode--activated .mobile-toc-toggle {
    background: var(--accent-color);
}

.darkmode--activated .toc-close {
    color: #b0b0b0;
}

.darkmode--activated .toc-close:hover {
    background: #3a3a3a;
    color: #ffffff;
}