:root{--ink:#0b1220;--muted:#5a6472;--brand:#0b6bcb;--line:#e6e9ef;--bg:#fff;}
*{box-sizing:border-box}
body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;line-height:1.65;color:var(--ink);background:var(--bg)}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.container{width:min(1100px,92vw);margin:0 auto;padding:0 0 20px}
header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px}
nav ul{display:flex;list-style:none;margin:0;padding:0;gap:18px}
footer{border-top:1px solid var(--line);padding:20px 0;color:var(--muted);font-size:.95rem}
h1{font-size:clamp(1.6rem,3.4vw,2.2rem);margin:0 0 10px}
h2{font-size:1.35rem;margin:1.2rem 0 .6rem}
.lede{color:var(--muted)}
.section{padding:22px 0;border-top:1px solid var(--line)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.card{border:1px solid var(--line);border-radius:12px;background:#fff;padding:14px}
.badge{display:inline-block;border:1px solid var(--line);border-radius:999px;padding:4px 10px;color:var(--muted);margin-right:6px}
.ad{border:1px dashed #cbd5e1;border-radius:10px;padding:12px;text-align:center;color:#64748b;background:#f8fafc;margin:10px 0}
table{width:100%;border-collapse:collapse}
th,td{padding:10px;border-bottom:1px solid var(--line);text-align:left}
.hero{background:linear-gradient(180deg,#eef5ff,rgba(255,255,255,.7));padding:26px 0}
.btn{display:inline-block;padding:10px 14px;border-radius:10px;border:1px solid var(--brand);background:var(--brand);color:#fff;font-weight:700}
.btn.ghost{background:#fff;color:var(--brand)}
.input{padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:1rem;min-width:220px}
form .row{display:flex;gap:10px;flex-wrap:wrap}
.note{color:var(--muted);font-size:.95rem}
@media(max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:640px){nav ul{display:none}.grid{grid-template-columns:1fr}}