:root{
  --bg:#f6fbff;
  --card:#ffffff;
  --text:#0b1b2b;
  --muted:#4a6178;
  --brand:#2b8cff;
  --brand2:#65c7ff;
  --line:rgba(11,27,43,.12);
  --shadow: 0 10px 30px rgba(11,27,43,.08);
  --radius:18px;
  --max:1100px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:
  radial-gradient(900px 420px at 20% 10%, rgba(43,140,255,.18), transparent 55%),
  radial-gradient(900px 420px at 80% 0%, rgba(101,199,255,.22), transparent 55%),
  var(--bg);
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--max);margin:0 auto;padding:22px}
.topbar{
  position:sticky;top:0;z-index:50;
  backdrop-filter: blur(10px);
  background: rgba(246,251,255,.75);
  border-bottom:1px solid var(--line);
}
.nav{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{
  display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.3px;
}
.logo{
  width:38px;height:38px;border-radius:12px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: var(--shadow);
}
.menu{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.menu a{
  padding:10px 12px;border-radius:12px;
  color:var(--text);
}
.menu a.active, .menu a:hover{
  background: rgba(43,140,255,.10);
  text-decoration:none;
}
.hero{
  display:grid;grid-template-columns:1.35fr .65fr;gap:18px;align-items:stretch;
  padding:28px;margin-top:18px;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.86), rgba(255,255,255,.70));
  box-shadow: var(--shadow);
}
.hero h1{margin:0 0 10px 0;font-size:38px;line-height:1.08}
.hero p{margin:0;color:var(--muted);font-size:16px;line-height:1.6}
.hero .cta{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 14px;border-radius:14px;
  border:1px solid rgba(43,140,255,.20);
  background: rgba(43,140,255,.12);
  color:var(--text);font-weight:650;
}
.btn.primary{
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  color:white;border-color:transparent;
}
.btn:hover{filter:brightness(1.02);text-decoration:none}
.card{
  padding:18px;border-radius:var(--radius);
  border:1px solid var(--line);
  background:var(--card);
  box-shadow: var(--shadow);
}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:14px}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:14px}
h2{margin:0 0 10px 0}
h3{margin:0 0 6px 0}
.small{color:var(--muted);font-size:14px;line-height:1.55}
.footer{
  margin-top:22px;padding:18px 0;border-top:1px solid var(--line);
  color:var(--muted);font-size:13px;
}
.form label{display:block;font-weight:650;margin:10px 0 6px}
.input, textarea{
  width:100%;
  padding:12px 12px;border-radius:14px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.9);
  outline:none;
}
textarea{min-height:140px;resize:vertical}
.row{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.notice{
  padding:12px 14px;border-radius:14px;
  background: rgba(43,140,255,.10);
  border:1px solid rgba(43,140,255,.18);
  color:var(--text);
}
.error{
  background: rgba(255,70,70,.08);
  border-color: rgba(255,70,70,.18);
}
@media (max-width: 900px){
  .hero{grid-template-columns:1fr}
  .grid3{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .wrap{padding:16px}
}