:root{
  --bg:#fbfdff; --fg:#06283d; --muted:#6b7280;
  --primary:#0ea5a3; --accent:#ff7043; --card:#ffffff; --border:#e6f3f6;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;line-height:1.5}
a{color:var(--primary);text-decoration:none}
.container{max-width:1040px;margin:0 auto;padding:18px}
.header{position:sticky;top:0;background:linear-gradient(90deg,#fff,#f3fdfa);border-bottom:1px solid var(--border);z-index:40}
.navbar{display:flex;align-items:center;justify-content:space-between;padding:12px 16px}
.brand{font-weight:900;font-size:18px;color:var(--fg)}
.menu{display:flex;gap:10px;flex-wrap:wrap}
.menu a{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--border);font-size:13px}
.hero{background:linear-gradient(180deg,#f7fffe,#fff);border-radius:14px;padding:20px;border:1px solid var(--border);margin-top:12px}
.hero h1{margin:0 0 8px;font-size:28px;color:var(--fg)}
.card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;margin-top:12px;box-shadow:0 8px 20px rgba(14,165,163,0.04)}
.section h2{font-size:20px;margin:0 0 8px;color:var(--fg)}
.small{font-size:13px;color:var(--muted)}
.grid{display:grid;gap:12px}
.grid-2{grid-template-columns:1fr 1fr}
@media(max-width:820px){.grid-2{grid-template-columns:1fr}.menu{display:none}}
label{display:block;font-weight:700;margin-bottom:6px}
input,select,textarea,button{width:100%;padding:10px;border-radius:10px;border:1px solid var(--border);font-size:15px;background:#fff}
.btn{background:linear-gradient(90deg,var(--primary),#069f9d);color:#fff;border:0;padding:12px;border-radius:12px;font-weight:800;cursor:pointer}
.note{background:#fff7f3;border:1px solid #ffd6cc;padding:10px;border-radius:8px;color:var(--accent);font-weight:700}
.footer{margin-top:18px;border-top:1px solid var(--border);padding-top:12px;background:#fff}
.small-muted{font-size:12px;color:#98a3ad}
.code{font-family:monospace;background:#f1fbfb;padding:6px 8px;border-radius:6px;border:1px solid #e0f2f6;display:inline-block}