.lf-manual{max-width:1120px;margin:0 auto;padding:96px 40px 120px}.lf-manual-head{margin-bottom:64px}.lf-manual-head h1{font-family:var(--font-display);font-weight:var(--fw-semibold);font-size:clamp(30px,5.5vw,50px);line-height:1.06;letter-spacing:-.03em;color:var(--fg1);margin:26px 0 22px}.lf-manual-lead{font-size:19px;line-height:1.6;color:var(--fg2);max-width:620px;margin:0}.lf-manual-grid{display:grid;grid-template-columns:260px 1fr;grid-gap:48px;gap:48px}.lf-manual-aside{position:-webkit-sticky;position:sticky;top:96px;align-self:start}.lf-manual-toc{display:flex;flex-direction:column;gap:2px;list-style:none;margin:0;padding:0}.lf-manual-toc a{display:flex;gap:12px;align-items:baseline;padding:9px 0;color:var(--fg3);text-decoration:none;border-top:1px solid var(--line);transition:color .2s ease}.lf-manual-toc a:hover{color:var(--fg1)}.lf-manual-toc .n{font-family:var(--font-mono);font-size:11px;color:var(--accent);flex-shrink:0}.lf-manual-toc .t{font-size:14px;line-height:1.4}.lf-manual-section{scroll-margin-top:96px;padding:0 0 48px}.lf-rail{position:fixed;right:18px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;align-items:flex-end;gap:10px;z-index:20}.lf-rail [data-tick]{position:relative;width:18px;height:2px;background:var(--line-2);transform-origin:right center;transition:transform .3s cubic-bezier(.16,1,.3,1)}.lf-rail [data-tick]:before{content:"";position:absolute;inset:0;background:var(--accent);opacity:0;transition:opacity .3s cubic-bezier(.16,1,.3,1)}.lf-rail [data-state=reached]{transform:scaleX(1.4)}.lf-rail [data-state=reached]:before{opacity:.45}.lf-rail [data-state=head]{transform:scaleX(1.9)}.lf-rail [data-state=head]:before{opacity:1}@media (prefers-reduced-motion:reduce){.lf-rail [data-tick],.lf-rail [data-tick]:before{transition:none}}@media (max-width:900px){.lf-rail{display:none}.lf-manual{padding:72px 24px 96px}.lf-manual-grid{grid-template-columns:1fr;gap:40px}.lf-manual-aside{position:static;top:auto;padding-bottom:24px;border-bottom:1px solid var(--line)}}