.article-head{background:linear-gradient(180deg,var(--accent-soft) 0%,var(--bg) 100%);padding-top:clamp(16px,3vw,28px);padding-bottom:clamp(24px,4vw,40px)}.article-head h1{max-width:860px}.article-cover-wrap{margin-top:24px}.article-cover{display:block;width:100%;max-width:960px;aspect-ratio:3 / 2;height:auto;object-fit:cover;object-position:center;border-radius:22px;box-shadow:var(--shadow-soft);margin:0 auto}.article-layout{display:grid;grid-template-columns:1fr;gap:30px;padding-top:clamp(32px,5vw,52px);padding-bottom:clamp(40px,6vw,64px)}.article-main{max-width:820px}.toc-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius-card);box-shadow:var(--shadow-card);padding:20px 22px}.toc-title{display:block;font-weight:800;font-size:15px;color:var(--ink);margin-bottom:12px}.toc-card ol{list-style:none;counter-reset:toc;display:grid;gap:9px}.toc-card li{counter-increment:toc;display:flex;gap:9px;font-size:14px;line-height:1.4}.toc-card li:before{content:counter(toc);flex-shrink:0;width:22px;height:22px;border-radius:50%;background:var(--accent-soft);color:var(--accent-ink);font-weight:700;font-size:12px;display:inline-flex;align-items:center;justify-content:center}.toc-card a{color:#3f4145}.toc-card a:hover{color:var(--accent-ink)}.related{margin-top:44px;padding-top:28px;border-top:1px solid var(--border)}.related h2{font-size:22px;margin-bottom:16px}.related ul{list-style:none;display:grid;gap:12px}.related a{font-size:16.5px;font-weight:700;color:var(--ink);display:inline-flex;gap:10px;align-items:baseline}.related a:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0;align-self:center}.related a:hover{color:var(--accent-ink);text-decoration:none}@media (min-width: 1000px){.article-layout{grid-template-columns:280px 1fr;gap:44px;align-items:start}.article-toc{position:sticky;top:90px}}