:root{--bg:#f6f5f1;--fg:#1f2328;--muted:#5b6169;--accent:#2f6f5e;--line:#e2dfd7;--card:#fff}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--fg);line-height:1.6;font-size:17px}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:980px;margin:0 auto;padding:0 24px}
header{border-bottom:1px solid var(--line);background:var(--bg)}
header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:18px;padding-bottom:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--fg);letter-spacing:.2px}
.brand:hover{text-decoration:none}
.mark{width:28px;height:28px;border-radius:7px;background:var(--accent);display:inline-grid;place-items:center;color:#fff;font-size:15px;font-weight:700}
nav a{margin-left:20px;color:var(--muted);font-size:15px}nav a:first-child{margin-left:0}
nav a.on{color:var(--fg);font-weight:600}
.hero{padding:72px 0 48px}
.hero h1{font-size:clamp(30px,5vw,46px);line-height:1.15;margin:0 0 18px;max-width:760px}
.lead{font-size:19px;color:var(--muted);max-width:680px;margin:0}
section{padding:36px 0}
h2{font-size:24px;margin:0 0 16px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:15.5px}
ul.plain{padding-left:18px;color:var(--muted)}
.note{background:var(--card);border-left:4px solid var(--accent);padding:16px 20px;border-radius:6px;color:var(--muted)}
footer{border-top:1px solid var(--line);margin-top:48px;padding:28px 0;color:var(--muted);font-size:14px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}
.center{text-align:center;padding:96px 0}
.big{font-size:72px;font-weight:700;color:var(--accent);margin:0;line-height:1}
@media (max-width:600px){nav a{margin-left:14px;font-size:14px}.hero{padding:48px 0 32px}body{font-size:16px}}