:root{--ink:#17211c;--muted:#59645d;--paper:#fbfaf6;--card:#fff;--line:#dfe5df;--accent:#2f5e45;--soft:#edf4ef;--warm:#f6efe4}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:16px/1.68 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--ink);background:var(--paper)}
a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}a:hover{text-decoration-thickness:2px}
.wrap{max-width:1120px;margin:auto;padding:0 22px}.site-head{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:10}
.head-inner{display:flex;align-items:center;justify-content:space-between;min-height:70px;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;text-decoration:none;color:var(--ink);letter-spacing:-.02em}
.logo{width:34px;height:34px;border:2px solid var(--accent);border-radius:9px;display:grid;place-items:center;color:var(--accent);font-weight:900}.nav{display:flex;gap:18px;flex-wrap:wrap}.nav a{text-decoration:none;color:var(--ink);font-size:14px}
.hero{padding:72px 0 52px;background:linear-gradient(180deg,#f4f8f5 0%,var(--paper) 100%)}.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:42px;align-items:center}
.kicker{font-weight:800;text-transform:uppercase;letter-spacing:.1em;font-size:12px;color:var(--accent)}h1{font-size:clamp(38px,6vw,68px);line-height:1.02;letter-spacing:-.045em;margin:.18em 0}
h2{font-size:clamp(26px,4vw,38px);line-height:1.15;letter-spacing:-.025em;margin-top:1.7em}h3{font-size:21px;margin-top:1.6em}
.lede{font-size:20px;color:var(--muted);max-width:760px}.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:750;padding:13px 18px;border-radius:9px;margin:6px 8px 6px 0}
.btn.alt{background:transparent;color:var(--accent);border:1px solid var(--accent)}.notice{background:var(--warm);border:1px solid #eadcc8;padding:16px 18px;border-radius:10px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px}.card h3{margin-top:0}.card a{font-weight:750}
main.article{max-width:820px;margin:52px auto;padding:0 22px}.crumbs{font-size:13px;color:var(--muted);margin-bottom:24px}.meta{font-size:14px;color:var(--muted)}
.toc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;margin:24px 0}.toc strong{display:block;margin-bottom:8px}
.callout{background:var(--soft);border-left:4px solid var(--accent);padding:17px 18px;margin:25px 0}.affiliate{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px;margin:30px 0}
ul.check li{margin:.35em 0}.sourcebox{font-size:14px;color:var(--muted);border-top:1px solid var(--line);margin-top:36px;padding-top:18px}.footer{border-top:1px solid var(--line);margin-top:70px;padding:34px 0 60px;color:var(--muted);font-size:14px}
@media(max-width:800px){.hero-grid,.grid{grid-template-columns:1fr}.nav{display:none}.hero{padding-top:45px}}