.smart-toc{background:#fff;border:1px solid rgba(0,0,0,.1);border-radius:16px;padding:14px 14px 16px;margin:0 0 30px;max-width:var(--smart-toc-maxw);box-shadow:0 12px 26px rgba(17,24,39,.06)}.smart-toc--sticky{position:sticky;top:110px}.smart-toc-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 10px}.smart-toc-title{font-weight:800;font-size:16px;margin:0;color:#111827}.smart-toc-toggle{appearance:none;border:1px solid rgba(0,0,0,.1);background:#fff;color:#111827;border-radius:999px;padding:6px 10px;font-size:12px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;gap:8px;transition:transform .16s ease,box-shadow .16s ease}.smart-toc-toggle:hover{transform:translateY(-1px);box-shadow:0 10px 20px rgba(17,24,39,.08)}.smart-toc-chevron{width:10px;height:10px;border-right:2px solid rgba(17,24,39,.6);border-bottom:2px solid rgba(17,24,39,.6);transform:rotate(45deg);transition:transform .2s ease}.smart-toc.is-collapsed .smart-toc-chevron{transform:rotate(-135deg)}.smart-toc-list{list-style:none;padding:0;margin:0}.smart-toc.is-collapsed .smart-toc-list{display:none}.smart-toc-list li{margin:6px 0}.smart-toc-list li a{text-decoration:none;font-size:14px;color:#374151;transition:color .2s ease}.smart-toc-list li a.active{color:var(--smart-toc-accent);font-weight:700}.toc-h3{padding-left:12px}.toc-h4{padding-left:24px}.toc-h5{padding-left:36px}.toc-h6{padding-left:48px}