:root{
  --bg:#07090d;
  --bg2:#0d1118;
  --panel:rgba(12,16,24,.82);
  --panel-strong:rgba(18,23,35,.95);
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(245,158,11,.24);
  --text:#eef2ff;
  --muted:#8b95aa;
  --soft:#5f687a;
  --accent:#f59e0b;
  --accent2:#f97316;
  --good:#22c55e;
  --shadow:0 20px 70px rgba(0,0,0,.45);
  --radius:22px;
  --mono:'JetBrains Mono','SFMono-Regular',Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:radial-gradient(circle at top,#131a26 0,#090b10 45%,#06070a 100%);color:var(--text);font-family:var(--sans)}
body{overflow-x:hidden}
button,input{font:inherit}
.bg-grid,.bg-orb{position:fixed;inset:0;pointer-events:none}
.bg-grid{background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:70px 70px;mask-image:radial-gradient(circle at center,rgba(0,0,0,.8),transparent 78%)}
.bg-orb{filter:blur(80px);opacity:.7}
.bg-orb-a{background:radial-gradient(circle,rgba(245,158,11,.17),transparent 60%);left:-18vw;top:-8vh;width:46vw;height:46vw}
.bg-orb-b{background:radial-gradient(circle,rgba(249,115,22,.16),transparent 60%);right:-12vw;bottom:-10vh;width:42vw;height:42vw}
.page{position:relative;z-index:1;max-width:1240px;margin:0 auto;padding:28px 22px 42px}
.topbar,.hero,.layout,.contact{backdrop-filter:blur(18px)}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 4px 24px}
.brand{display:flex;align-items:center;gap:14px;text-decoration:none;color:inherit}
.brand-mark{width:48px;height:48px;border-radius:16px;background:linear-gradient(145deg,rgba(245,158,11,.18),rgba(249,115,22,.08));border:1px solid var(--line-strong);display:grid;place-items:center;font-weight:800;letter-spacing:.08em;box-shadow:var(--shadow)}
.brand-copy{display:flex;flex-direction:column;gap:2px}
.brand-copy strong{font-size:20px;letter-spacing:.18em}
.brand-copy small{font-size:11px;color:var(--muted);letter-spacing:.18em}
.status-pill{display:inline-flex;align-items:center;gap:10px;padding:10px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.03);color:var(--muted);font-size:12px;letter-spacing:.14em}
.status-pill span{width:8px;height:8px;border-radius:50%;background:var(--good);box-shadow:0 0 14px rgba(34,197,94,.75)}
.hero{display:grid;grid-template-columns:1.35fr .8fr;gap:28px;align-items:center;padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.02));box-shadow:var(--shadow)}
.eyebrow{margin:0 0 14px;color:var(--accent);font-size:12px;letter-spacing:.28em;text-transform:uppercase}
.hero h1{margin:0;font-size:clamp(44px,6vw,82px);line-height:.96;letter-spacing:-.04em}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#fff,rgba(255,255,255,.55));-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{max-width:680px;margin:20px 0 0;color:var(--muted);font-size:16px;line-height:1.8}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.hero-meta span{padding:10px 14px;border-radius:999px;border:1px solid var(--line);color:#d5d9e3;background:rgba(255,255,255,.03);font-size:13px}
.hero-graphic{position:relative;min-height:280px;display:grid;place-items:center}
.ring{position:absolute;border-radius:50%;border:1px solid rgba(245,158,11,.18)}
.ring-1{width:140px;height:140px}
.ring-2{width:220px;height:220px}
.ring-3{width:300px;height:300px}
.core{width:110px;height:110px;border-radius:36px;background:linear-gradient(145deg,rgba(245,158,11,.24),rgba(249,115,22,.08));border:1px solid rgba(255,255,255,.12);display:grid;place-items:center;font-size:28px;font-weight:800;letter-spacing:.2em;box-shadow:0 0 60px rgba(245,158,11,.14),inset 0 0 24px rgba(255,255,255,.05)}
.layout{display:grid;grid-template-columns:1fr 1.2fr;gap:22px;margin-top:22px}
.panel,.contact{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow)}
.panel{padding:22px}
.panel-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:20px}
.panel-head h2{margin:4px 0 0;font-size:22px}
.step{font-size:12px;letter-spacing:.22em;color:var(--accent)}
.ghost-btn,.primary,.copy-btn{border:0;border-radius:14px;cursor:pointer;transition:transform .18s ease,opacity .18s ease,background .18s ease,box-shadow .18s ease}
.ghost-btn{padding:10px 14px;background:rgba(255,255,255,.06);color:#fff;border:1px solid var(--line)}
.ghost-btn:hover,.primary:hover,.copy-btn:hover{transform:translateY(-1px)}
.field{display:flex;flex-direction:column;gap:9px;margin-bottom:16px}
.field span{color:#d8deea;font-size:14px;letter-spacing:.08em}
.field input{height:56px;border-radius:16px;border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);padding:0 16px;font-size:16px;outline:none;transition:border-color .18s ease,box-shadow .18s ease,background .18s ease}
.field input:focus{border-color:var(--line-strong);box-shadow:0 0 0 4px rgba(245,158,11,.12);background:rgba(255,255,255,.06)}
.key-status{display:flex;align-items:center;gap:10px;margin:10px 0 16px;color:var(--muted);font-size:13px}
.key-status i{width:10px;height:10px;border-radius:50%;background:#64748b;box-shadow:0 0 0 5px rgba(100,116,139,.12)}
.key-status.valid i{background:var(--good);box-shadow:0 0 0 5px rgba(34,197,94,.12)}
.key-status.invalid i{background:#ef4444;box-shadow:0 0 0 5px rgba(239,68,68,.12)}
.message{min-height:24px;margin:12px 0 0;color:var(--muted)}
.message.error{color:#fca5a5}
.primary{width:100%;height:56px;margin-top:6px;display:flex;align-items:center;justify-content:space-between;padding:0 16px;background:linear-gradient(90deg,var(--accent),var(--accent2));color:#100b02;font-weight:700;box-shadow:0 18px 42px rgba(245,158,11,.24)}
.primary:disabled{opacity:.65;cursor:not-allowed;transform:none}
.cards{display:grid;grid-template-columns:1fr;gap:14px}
.password-card{position:relative;overflow:hidden;padding:18px;border-radius:22px;border:1px solid rgba(255,255,255,.08);background:linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,.015))}
.password-card.current{border-color:rgba(245,158,11,.28);background:linear-gradient(180deg,rgba(245,158,11,.14),rgba(255,255,255,.03))}
.card-top{display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:13px}
.password-card strong{display:block;margin-top:18px;font-family:var(--mono);font-size:32px;letter-spacing:.18em}
.password-card.dim strong{color:#b5bccb}
.password-card.current strong{font-size:40px;color:#fff}
.copy-btn{margin-top:16px;padding:12px 16px;background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.08)}
.meter{margin-top:18px;padding:16px 0 6px}
.meter-bar{height:8px;border-radius:999px;background:rgba(255,255,255,.06);overflow:hidden}
.meter-bar i{display:block;height:100%;width:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));border-radius:999px;box-shadow:0 0 18px rgba(245,158,11,.32)}
.meter-row,.result-note{display:flex;justify-content:space-between;gap:14px;align-items:center;font-size:13px;color:var(--muted)}
.meter-row{margin-top:12px}
.meter-row strong{color:#fff;font-family:var(--mono);font-size:15px}
.result-note{margin-top:16px;padding-top:16px;border-top:1px solid var(--line)}
.contact{display:flex;justify-content:space-between;gap:14px;align-items:center;padding:18px 22px;margin-top:22px;color:#d9deea}
.contact small{display:block;color:var(--muted);letter-spacing:.22em;margin-bottom:4px}
.contact strong{font-size:18px}
.contact span{color:var(--muted)}
@media (max-width:960px){
  .hero,.layout{grid-template-columns:1fr}
  .hero-graphic{min-height:220px}
}
@media (max-width:640px){
  .page{padding:18px 14px 28px}
  .topbar{gap:12px;flex-direction:column;align-items:flex-start}
  .hero{padding:20px}
  .hero h1{font-size:40px}
  .panel{padding:18px}
  .password-card strong,.password-card.current strong{font-size:26px;letter-spacing:.12em}
  .contact{flex-direction:column;align-items:flex-start}
}