:root{--toc-sticky-top:5.75rem;}.post-body-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(220px,280px);gap:3.5rem;align-items:start;width:100%;}.post-body-layout--no-toc{display:block;}.post-body-layout .post-content{max-width:none;}.post-toc{position:sticky;top:var(--toc-sticky-top);align-self:start;z-index:10;}.post-toc-desktop{position:relative;max-height:calc(100vh - var(--toc-sticky-top) - 1.5rem);overflow:hidden;display:flex;flex-direction:column;background:linear-gradient(165deg,rgba(255,255,255,0.98) 0%,rgba(247,246,243,0.95) 100%);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:0 1px 2px rgba(17,17,24,0.04),0 12px 40px rgba(17,17,24,0.07);backdrop-filter:blur(12px);}.post-toc-desktop::before{content:"";position:absolute;inset:0 auto 0 0;width:3px;border-radius:var(--radius-lg) 0 0 var(--radius-lg);background:linear-gradient(180deg,var(--accent) 0%,rgba(91,92,246,0.35) 100%);pointer-events:none;}.post-toc-header{display:flex;align-items:center;gap:0.6rem;padding:1.15rem 1.25rem 0.85rem 1.35rem;border-bottom:1px solid var(--border);flex-shrink:0;}.post-toc-icon{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:10px;background:var(--accent-light);color:var(--accent);flex-shrink:0;}.post-toc-title{margin:0;font-family:var(--font-sans);font-size:0.82rem;font-weight:700;letter-spacing:0.02em;color:var(--text);}.post-toc-nav{overflow-y:auto;overscroll-behavior:contain;padding:0.85rem 0.75rem 1.1rem 1rem;scrollbar-width:thin;scrollbar-color:rgba(91,92,246,0.35) transparent;}.post-toc-nav::-webkit-scrollbar{width:5px;}.post-toc-nav::-webkit-scrollbar-thumb{background:rgba(91,92,246,0.3);border-radius:999px;}.post-toc-list{list-style:none;margin:0;padding:0;}.post-toc-item{margin:0.15rem 0;}.post-toc-item a{display:block;padding:0.5rem 0.75rem;font-size:0.875rem;font-weight:500;line-height:1.4;color:var(--muted);text-decoration:none;border-radius:8px;border-left:2px solid transparent;transition:color 0.2s,background 0.2s,border-color 0.2s,transform 0.15s;}.post-toc-item a:hover{color:var(--text);background:rgba(91,92,246,0.06);}.post-toc-item a.is-active{color:var(--accent);background:var(--accent-light);border-left-color:var(--accent);font-weight:600;}.post-toc-level-2 a{font-weight:600;color:var(--text);}.post-toc-level-3 a{padding-left:1.35rem;font-size:0.84rem;}.post-toc-level-4 a{padding-left:1.85rem;font-size:0.8rem;}.post-toc-level-5 a,.post-toc-level-6 a{padding-left:2.25rem;font-size:0.78rem;}.post-toc-inline{margin:2rem 0 2.5rem;}.post-toc-inline .post-toc-desktop{max-height:none;}.post-toc-mobile{display:none;margin-bottom:1.75rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);overflow:hidden;}.post-toc-mobile-summary{display:flex;align-items:center;gap:0.6rem;padding:1rem 1.25rem;font-weight:600;font-size:0.9rem;cursor:pointer;list-style:none;color:var(--text);}.post-toc-mobile-summary::before{content:"";width:8px;height:8px;border-right:2px solid var(--accent);border-bottom:2px solid var(--accent);transform:rotate(45deg);transition:transform 0.2s;margin-right:0.15rem;}.post-toc-mobile[open] .post-toc-mobile-summary::before{transform:rotate(-135deg);margin-top:4px;}.post-toc-mobile-summary::-webkit-details-marker{display:none;}.post-toc-mobile .post-toc-nav{padding:0.5rem 0.75rem 1rem 1rem;border-top:1px solid var(--border);max-height:50vh;}.post-content h2[id],.post-content h3[id],.post-content h4[id],.post-content h5[id],.post-content h6[id]{scroll-margin-top:var(--toc-sticky-top);}@media (max-width:1024px){.post-body-layout{grid-template-columns:1fr;gap:0;}.post-toc{position:static;order:-1;margin-bottom:0.5rem;}.post-toc-desktop{display:none;}.post-toc-mobile{display:block;}}