:root{--ink: #202826;--muted: #65716b;--line: #e0e6e1;--wash: #f6f8f6;--paper: #ffffff;--pine: #285449;--orange: #477062;--max: 1080px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--paper);font-family:-apple-system,BlinkMacSystemFont,PingFang SC,Microsoft YaHei,Noto Sans CJK SC,system-ui,sans-serif;font-size:16px;line-height:1.85}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:.18em}a:hover{color:var(--pine)}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.4;letter-spacing:-.015em;font-weight:650}h1{font-size:clamp(2.1rem,4.5vw,3.65rem);max-width:16em;margin-bottom:1.4rem}h2{font-size:clamp(1.4rem,2.5vw,2rem);margin-bottom:1.1rem}h3{font-size:1.08rem;margin-bottom:.55rem}ul{padding-left:1.1rem}li+li{margin-top:.35rem}.shell{width:min(var(--max),calc(100% - 3rem));margin-inline:auto}.section{padding:clamp(3rem,6vw,5rem) 0}.section--tight{padding:clamp(2.5rem,5vw,4rem) 0}.eyebrow{color:var(--orange);font-size:.8rem;font-weight:650;letter-spacing:.08em}.lede{color:#344548;font-size:clamp(1.05rem,2vw,1.2rem);max-width:42rem}.muted{color:var(--muted)}.site-header{border-bottom:1px solid var(--line);background:var(--paper)}.nav-wrap{min-height:4.75rem;display:flex;align-items:center;justify-content:space-between;gap:2rem}.wordmark{color:var(--pine);font-size:1.8rem;font-weight:800;letter-spacing:-.1em;text-decoration:none}.wordmark span{color:var(--orange)}.nav-list{display:flex;align-items:center;gap:clamp(.75rem,2vw,1.5rem);margin:0;padding:0;list-style:none;font-size:.92rem}.nav-list a{color:#415053;text-decoration:none}.nav-list a[aria-current=page],.nav-list a[aria-current=location]{color:var(--pine);font-weight:720}.nav-list li+li,.machine-links li+li{margin-top:0}.site-footer{border-top:1px solid var(--line);padding:2.5rem 0;color:var(--muted);font-size:.9rem}.footer-grid{display:flex;justify-content:space-between;gap:2rem}.footer-grid p{margin-bottom:0}.footer-grid strong{color:var(--ink)}.skip-link{position:absolute;left:1rem;top:-4rem;background:var(--pine);color:#fff;padding:.6rem .8rem;z-index:2}.skip-link:focus{top:1rem}.hero{padding-block:clamp(4.5rem,10vw,8rem);display:grid;align-items:center}.hero-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(15rem,.75fr);gap:clamp(2rem,8vw,8rem);align-items:end}.hero-statement{padding-bottom:.75rem;border-bottom:1px solid var(--line);color:var(--muted)}.hero-statement p:last-child{margin-bottom:0}.button-row{display:flex;gap:.9rem;flex-wrap:wrap;margin-top:2rem}.button{display:inline-flex;align-items:center;justify-content:center;min-height:2.8rem;padding:.6rem 1rem;border:1px solid var(--pine);background:var(--pine);color:#fff;text-decoration:none;font-weight:700}.button:hover,.button--secondary{background:transparent;color:var(--pine)}.button--secondary:hover{background:var(--pine);color:#fff}.split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:clamp(2rem,8vw,8rem);align-items:start}.band{background:var(--wash)}.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1rem}.card{padding:1.4rem;border:1px solid var(--line);background:var(--paper)}.card p:last-child{margin-bottom:0}.rule-list{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}.rule-list li{display:grid;grid-template-columns:2rem 1fr;gap:1rem;padding:1.25rem 0;border-bottom:1px solid var(--line)}.rule-list strong{color:var(--orange)}.number{color:var(--orange);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.8rem;padding-top:.25rem}.page-header{padding:clamp(3rem,6vw,5rem) 0 clamp(2rem,4vw,3rem);border-bottom:1px solid var(--line)}.page-header h1{margin-bottom:1rem;max-width:20em;font-size:clamp(2rem,4vw,3rem)}.prose{max-width:47rem}.context-grid{display:grid;grid-template-columns:12rem minmax(0,1fr);gap:2rem;padding:1.8rem 0;border-top:1px solid var(--line)}.context-grid:last-child{border-bottom:1px solid var(--line)}.context-grid h2{font-size:1rem;letter-spacing:0;margin:0}.context-grid ul{margin:0}.notice{padding:1.25rem 1.4rem;border-left:3px solid var(--orange);background:var(--wash);max-width:52rem}.machine-links{display:flex;flex-wrap:wrap;gap:.75rem;list-style:none;margin:1.5rem 0 0;padding:0}.machine-links a{padding:.4rem .65rem;border:1px solid var(--line);font-family:inherit;font-size:.82rem;text-decoration:none}.tool-status{display:inline-block;margin-bottom:1rem;color:var(--orange);font-size:.78rem;font-weight:650;letter-spacing:.04em}.no-margin{margin-bottom:0}:focus-visible{outline:3px solid var(--pine);outline-offset:4px}[id]{scroll-margin-top:1.5rem}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media(max-width:720px){.shell{width:min(var(--max),calc(100% - 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