body{background:#f4f8f6}.method-hero{padding:58px 0 36px;border-bottom:1px solid var(--line)}.method-hero h1{max-width:850px}.method-hero .lede{max-width:800px}.method-layout{display:grid;grid-template-columns:230px minmax(0,760px);gap:54px;align-items:start;padding:46px 0 80px}.method-nav{position:sticky;top:24px;padding:18px;background:#e8f0ed;border:1px solid var(--line);border-radius:12px}.method-nav strong{display:block;margin-bottom:10px}.method-nav a{display:block;padding:6px 0;color:var(--deep);font-size:.86rem;text-decoration:none}.method-content section+section{margin-top:56px;padding-top:50px;border-top:1px solid var(--line)}.method-content h2{margin:0 0 16px;font-size:clamp(1.8rem,4vw,2.7rem);font-weight:500}.method-content h3{margin:28px 0 9px;font-size:1.25rem}.method-content p,.method-content li{color:#364f50}.method-content li+li{margin-top:8px}.formula{margin:18px 0;padding:18px 20px;background:var(--deep);color:#fff;border-radius:10px;overflow:auto;font:600 .88rem/1.7 ui-monospace,Consolas,monospace;white-space:pre-wrap}.method-table{width:100%;border-collapse:collapse;margin:20px 0;background:#fff;font-size:.88rem}.method-table th,.method-table td{padding:12px 13px;border:1px solid var(--line);text-align:left;vertical-align:top}.method-table th{background:#e8f0ed;color:var(--deep)}.source-list a{word-break:break-word}.callout{margin:22px 0;padding:18px 20px;background:var(--amber-pale);border-left:4px solid var(--amber);border-radius:8px}.worked{padding:24px;background:#fff;border:1px solid var(--line);border-radius:14px}.worked h3{margin-top:0}.back-link{display:inline-flex;margin-top:22px;font-weight:800;text-decoration:none}@media(max-width:760px){.method-layout{grid-template-columns:1fr;gap:24px}.method-nav{position:static}.method-table{display:block;overflow-x:auto}}