.smart-toc{--smart-toc-accent:#0073aa;--smart-toc-bg:#f9f9f9;--smart-toc-text:#333333;--smart-toc-border:#e5e5e5;--smart-toc-link-hover:#005177;--smart-toc-active-bg:rgba(0, 115, 170, 0.08);--smart-toc-radius:6px;--smart-toc-font-size:0.9rem;--smart-toc-transition:0.2s ease}@media (prefers-color-scheme:dark){.smart-toc{--smart-toc-bg:#1e1e1e;--smart-toc-text:#e0e0e0;--smart-toc-border:#3a3a3a;--smart-toc-active-bg:rgba(0, 166, 255, 0.12)}}.smart-toc{display:block;width:100%;max-width:100%;margin:1.5rem 0;padding:0;background:var(--smart-toc-bg);border:1px solid var(--smart-toc-border);border-left:3px solid var(--smart-toc-accent);border-radius:var(--smart-toc-radius);font-size:var(--smart-toc-font-size);color:var(--smart-toc-text);box-sizing:border-box;contain:layout style}.smart-toc__header{display:flex;align-items:center;justify-content:space-between;padding:.75rem 1rem;cursor:default;user-select:none;gap:.5rem}.smart-toc__title{font-weight:600;font-size:.95rem;color:var(--smart-toc-text);letter-spacing:.01em}.smart-toc__toggle{display:flex;align-items:center;justify-content:center;flex-shrink:0;width:26px;height:26px;padding:0;background:#fff0;border:1px solid var(--smart-toc-border);border-radius:4px;cursor:pointer;color:var(--smart-toc-text);transition:background var(--smart-toc-transition),border-color var(--smart-toc-transition)}.smart-toc__toggle:hover{background:var(--smart-toc-active-bg);border-color:var(--smart-toc-accent)}.smart-toc__toggle:focus-visible{outline:2px solid var(--smart-toc-accent);outline-offset:2px}.smart-toc__toggle-icon{display:block;width:10px;height:10px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:rotate(45deg) translateY(-2px);transition:transform var(--smart-toc-transition)}.smart-toc__toggle[aria-expanded="false"] .smart-toc__toggle-icon{transform:rotate(-135deg) translateY(-2px)}.smart-toc__body{overflow:hidden;padding:0 1rem .75rem;transition:max-height 0.3s ease,opacity 0.3s ease,padding 0.3s ease;max-height:2000px;opacity:1}.smart-toc--collapsible .smart-toc__body[hidden],.smart-toc--collapsible .smart-toc__body.is-hidden{display:block!important;max-height:0;opacity:0;padding-bottom:0;pointer-events:none}.smart-toc__list{margin:0;padding:0;list-style:none}.smart-toc__list--nested{padding-left:1.25rem;margin-top:.25rem}.smart-toc--numbered .smart-toc__list{list-style:none;counter-reset:smart-toc-counter}.smart-toc--numbered .smart-toc__item>.smart-toc__link::before{counter-increment:smart-toc-counter;content:counters(smart-toc-counter,".") ". ";color:var(--smart-toc-accent);font-weight:500;margin-right:.15em}.smart-toc__item{margin:.1rem 0;line-height:1.5}.smart-toc__link{display:block;padding:.25rem .4rem;color:var(--smart-toc-text);text-decoration:none;border-radius:3px;transition:color var(--smart-toc-transition),background var(--smart-toc-transition);word-break:break-word;hyphens:auto}.smart-toc__link:hover{color:var(--smart-toc-accent);background:var(--smart-toc-active-bg);text-decoration:none}.smart-toc__link.is-active{color:var(--smart-toc-accent);background:var(--smart-toc-active-bg);font-weight:500}.smart-toc__item--h3>.smart-toc__link{font-size:.875rem}.smart-toc__item--h4>.smart-toc__link{font-size:.825rem;opacity:.85}.smart-toc__back-to-top{position:fixed;bottom:1.5rem;right:1.5rem;z-index:999;display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--smart-toc-accent);color:#fff;border:none;border-radius:50%;cursor:pointer;box-shadow:0 2px 8px rgb(0 0 0 / .2);opacity:0;transition:opacity 0.3s ease,transform 0.3s ease;transform:translateY(8px)}.smart-toc__back-to-top:not([hidden]){opacity:1;transform:translateY(0)}.smart-toc__back-to-top:hover{filter:brightness(1.1)}.smart-toc__back-to-top:focus-visible{outline:2px solid var(--smart-toc-accent);outline-offset:3px}@media (max-width:600px){.smart-toc--mobile-collapsed .smart-toc__body{max-height:0;opacity:0;padding-bottom:0;pointer-events:none}.smart-toc--mobile-collapsed .smart-toc__toggle[aria-expanded="true"] .smart-toc__toggle-icon{transform:rotate(45deg) translateY(-2px)}.smart-toc--mobile-collapsed .smart-toc__toggle[aria-expanded="false"] .smart-toc__toggle-icon{transform:rotate(-135deg) translateY(-2px)}}@media (prefers-reduced-motion:reduce){.smart-toc__body,.smart-toc__toggle-icon,.smart-toc__link,.smart-toc__back-to-top{transition:none}}@media print{.smart-toc__back-to-top{display:none!important}.smart-toc__toggle{display:none!important}.smart-toc__body.is-hidden{max-height:none!important;opacity:1!important;pointer-events:auto!important}}