.read{padding:36px 0 72px}
.read-head{max-width:680px;margin-bottom:32px}
.read-head h1{font-size:clamp(26px,3.6vw,40px);margin:6px 0 10px}
.read-head p{color:var(--muted)}
.toc-bar{position:sticky;top:60px;z-index:80;background:var(--paper);border-bottom:1px solid var(--line);margin:0 0 28px;padding:8px 0}
.toc-bar ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;font-size:12px;font-weight:800}
.toc-bar a{padding:6px 10px;border:1px solid var(--line);background:#fff;color:var(--muted)}
.toc-bar a.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.sheet{display:grid;grid-template-columns:100px 1fr;gap:20px;padding:28px 0;border-top:1px solid var(--line);scroll-margin-top:110px}
.sheet .big{font-size:48px;font-weight:900;color:var(--mark);line-height:1}
.sheet h2{font-size:22px;margin-bottom:8px}
.sheet p,.sheet li{color:var(--muted)}
.sheet ul{list-style:none;margin-top:8px}
.sheet img{width:min(100%,360px);height:180px;object-fit:cover;margin-top:14px;border:1px solid var(--line)}
.sheet .kpi{display:inline-block;margin-top:10px;font-weight:900;color:var(--ink)}
.next{margin-top:16px;font-size:13px;font-weight:800;color:var(--mark)}
@media(max-width:720px){.sheet{grid-template-columns:1fr}.sheet .big{font-size:28px}}