:root{--bg:#f7f8fa;--card:#fff;--text:#17202a;--muted:#5c6673;--line:#e2e6eb;--accent:#2563eb;--accent2:#0f766e}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{width:min(1080px,calc(100% - 32px));margin:auto}
header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
.nav{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{font-weight:800;font-size:20px;color:var(--text)}
nav{display:flex;gap:18px;flex-wrap:wrap}
nav a{color:var(--muted);font-size:14px}
main{padding:54px 0}
.hero{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:42px}
h1{font-size:clamp(32px,5vw,52px);line-height:1.12;margin:0 0 16px}
h2{font-size:28px;line-height:1.25;margin:42px 0 14px}
h3{font-size:20px;margin:28px 0 8px}
p{margin:0 0 16px}
.lead{font-size:19px;color:var(--muted);max-width:820px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:28px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px}
.card h3{margin-top:0}
.meta{font-size:13px;color:var(--muted)}
ul,ol{padding-left:24px}
li{margin:7px 0}
.note{border-left:4px solid var(--accent2);background:#eef8f6;padding:16px 18px;margin:22px 0;border-radius:8px}
table{width:100%;border-collapse:collapse;background:#fff;margin:20px 0}
th,td{text-align:left;padding:12px 14px;border:1px solid var(--line)}
th{background:#f0f3f6}
footer{border-top:1px solid var(--line);background:#fff;padding:28px 0;color:var(--muted);font-size:14px}
@media(max-width:720px){.nav{align-items:flex-start;flex-direction:column;padding:16px 0}.hero{padding:26px}.grid{grid-template-columns:1fr}main{padding:28px 0}}