:root{--ink:#0f172a;--muted:#5b6677;--line:#e3e8ec;--ground:#f4f6f7;--brand:#0b6b4d;--dark:#0b3d2b;--soft:#e7f4ee}
*{box-sizing:border-box}html,body{margin:0}
body{font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;background:var(--ground);color:var(--ink);font-size:16px;line-height:1.6}
a{color:var(--brand)}
header{background:#fff;border-bottom:1px solid var(--line)}
.wrap{max-width:820px;margin:0 auto;padding:0 20px}
.bar{display:flex;flex-wrap:wrap;align-items:center;gap:16px;padding:14px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;text-decoration:none;color:var(--ink);margin-right:auto}
.mark{width:36px;height:36px;border-radius:10px;background:var(--dark);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.mark b{color:#5bd69a}
nav a{margin-left:14px;text-decoration:none;font-weight:600;color:#334155}
nav a:hover{color:var(--brand)}
.hero{padding:48px 0 24px}
h1{font-size:34px;line-height:1.2;margin:0 0 12px;letter-spacing:-.01em}
h2{font-size:21px;margin:30px 0 8px}
.lead{font-size:18px;color:var(--muted);margin:0}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:6px 22px 22px;margin:18px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:18px 0}
.grid div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px}
.grid b{display:block;margin-bottom:4px}
.note{background:var(--soft);border-radius:12px;padding:12px 16px}
ul{padding-left:22px}li{margin:4px 0}
footer{padding:30px 0 50px;color:var(--muted);font-size:14px}