:root{
  --sky:#0ea5e9; --sky-dark:#0284c7; --sky-soft:#e0f2fe; --bg:#f5fbff;
  --card:#ffffff; --text:#0f172a; --muted:#5b7186; --border:#d7e9f7; --success:#16a34a;
}
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.page{max-width:1100px;margin:0 auto;padding:0 16px 24px}
.ad-wrap{max-width:1100px;margin:14px auto;padding:0 16px;min-height:60px}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.bar{max-width:1100px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:8px;font-weight:800;font-size:18px}
.logo{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:var(--sky);color:#fff;font-size:13px}
.nav{display:flex;gap:4px;flex-wrap:wrap}
.nav a{padding:8px 12px;border-radius:9px;font-size:14px;font-weight:600;color:var(--muted)}
.nav a:hover{background:var(--sky-soft);color:var(--text)}
.hero{background:linear-gradient(135deg,var(--sky-soft),#fff);border:1px solid var(--border);border-radius:22px;padding:34px 22px;margin-top:18px}
.hero h1{font-size:30px;line-height:1.2;margin:8px 0 0}
.hero p{color:var(--muted);max-width:680px}
.btn{display:inline-block;background:var(--sky);color:#fff;padding:12px 20px;border-radius:12px;font-weight:700;font-size:14px;border:0;cursor:pointer}
.btn:hover{background:var(--sky-dark)}
.btn.ghost{background:#fff;color:var(--text);border:1px solid var(--border)}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));margin-top:18px}
.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:16px;box-shadow:0 4px 18px rgba(14,165,233,.06)}
.card h3{margin:10px 0 4px;font-size:16px}
.card p{margin:0;color:var(--muted);font-size:14px}
.card img{border-radius:14px;aspect-ratio:16/10;object-fit:cover}
h1,h2,h3,h4{letter-spacing:-.01em}
h2.section{font-size:22px;margin:28px 0 4px}
.muted{color:var(--muted);font-size:14px}
.badge{display:inline-block;background:var(--sky-soft);color:var(--sky-dark);border-radius:999px;padding:4px 10px;font-size:12px;font-weight:700}
.prose p{color:#22384d;font-size:15px}
.list{list-style:none;padding:0;margin:16px 0 0;display:grid;gap:12px}
.offer{display:flex;justify-content:space-between;gap:12px;align-items:center;flex-wrap:wrap}
.progress{height:8px;border-radius:999px;background:#e2eef7;overflow:hidden;margin-top:10px}
.progress > div{height:100%;background:linear-gradient(90deg,var(--sky),#38bdf8)}
label{display:block;font-weight:600;font-size:14px;margin:12px 0 6px}
input,select,textarea{width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:12px;font-size:14px;background:#fff;font-family:inherit}
.error{background:#fee2e2;color:#b91c1c;padding:10px 12px;border-radius:12px;font-size:14px;margin-top:14px}
.code{font-family:ui-monospace,Menlo,monospace;font-weight:800;font-size:18px;color:var(--sky-dark);border:2px dashed var(--sky);border-radius:14px;padding:16px;text-align:center;background:#fff;word-break:break-all}
.site-footer{background:#fff;border-top:1px solid var(--border);margin-top:30px}
.cols{max-width:1100px;margin:0 auto;padding:28px 16px;display:grid;gap:22px;grid-template-columns:repeat(auto-fit,minmax(210px,1fr))}
.cols ul{list-style:none;padding:0;margin:8px 0 0;display:grid;gap:6px;font-size:14px;color:var(--muted)}
.cols p{color:var(--muted);font-size:14px}
.copy{border-top:1px solid var(--border);margin:0;padding:16px;text-align:center;font-size:12px;color:var(--muted)}
@media (max-width:640px){ .hero h1{font-size:24px} .nav a{padding:6px 9px} }