/**
 * Article TOC — 目录导航
 * berunactivewear.com
 */

/* ========== TOC Container (post-optimizer 结构) ========== */
#toc-nav-container,
.article-toc {
    background: #f8f9fa;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 2rem;
}

/* ========== TOC Title ========== */
.article-toc-title {
    font-size: 0.8125rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #1a1a1a;
    margin-bottom: 0.875rem;
    padding-bottom: 0.625rem;
    border-bottom: 2px solid #DC2626;
}

/* ========== TOC List ========== */
.article-toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* ========== TOC Item ========== */
.article-toc-item {
    margin-bottom: 4px;
}

/* ========== TOC Link ========== */
.article-toc-link {
    display: block;
    padding: 6px 0 6px 14px;
    border-left: 3px solid transparent;
    color: #444;
    font-size: 0.9375rem;
    line-height: 1.45;
    text-decoration: none;
    transition: all 0.2s ease;
}

.article-toc-link:hover {
    color: #DC2626;
    border-left-color: #DC2626;
    background: rgba(30,183,230,0.05);
    text-decoration: none;
}

/* ========== 站点原有 TOC 兼容 ========== */
.toc-nav {
    background: #f8f9fa;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 2rem;
}

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

.toc-list li {
    margin-bottom: 4px;
}

.toc-list li a {
    display: block;
    padding: 6px 0 6px 14px;
    border-left: 3px solid transparent;
    color: #444;
    font-size: 0.9375rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.toc-list li a:hover {
    color: #DC2626;
    border-left-color: #DC2626;
    background: rgba(30,183,230,0.05);
    text-decoration: none;
}

/* ========== Collapsible TOC (default COLLAPSED; click title row to expand) ========== */
/* Markup: #toc-nav-container > h2.toc-title[onclick toggles .expanded] > #toc-list-content (ul) */
.toc-title {                              /* compact widget header — was inheriting the large default <h2> size */
    margin: 0;
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.3;
    color: #1a1a1a;
}
.toc-title .bi-list-ul { font-size: 0.8rem; }
#toc-list-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
#toc-nav-container.expanded #toc-list-content {
    max-height: 1500px;
    margin-top: 0.875rem;                 /* breathing room below title only when open */
    transition: max-height 0.5s ease;
}
.toc-toggle-icon { transition: transform 0.3s ease; }