.etoc{margin:24px 0;padding:16px 18px;border:1px solid #e5e7eb;border-radius:12px;background:#fff;box-shadow:0 2px 10px rgb(0 0 0 / .04);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}.etoc-header{display:flex;align-items:center;justify-content:space-between}.etoc-toggle{all:unset;display:flex;align-items:center;gap:10px;width:100%;cursor:pointer;color:#111827;font-weight:700;font-size:18px;line-height:1.3}.etoc-icon{margin-left:auto;transition:transform .2s ease;color:#6b7280}.etoc-body{margin-top:12px}.etoc-list{list-style:none;margin:0;padding:0}.etoc-item{margin:6px 0}.etoc-list .etoc-list{margin-left:18px;padding-left:14px;border-left:1px solid #e5e7eb}.etoc-link{color:#374151;text-decoration:none;font-size:15px;line-height:1.6}.etoc-link:hover,.etoc-link.is-active{color:#2563eb}.etoc.is-collapsed .etoc-body{display:none}.etoc.is-collapsed .etoc-icon{transform:rotate(-90deg)}@media (max-width:768px){.etoc{padding:14px 16px}.etoc-toggle{font-size:17px}.etoc-link{font-size:14px}}