:root{
  --bg:#0b0f17;
  --card:#121a26;
  --text:#eaf1ff;
  --muted:#a9b6cc;
  --line:#223149;
  --accent:#6aa9ff;
  --danger:#ff6a6a;
  --ok:#5ce1a8;
  --shadow: 0 10px 35px rgba(0,0,0,.45);
  --radius:16px;
  font-synthesis-weight: none;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft Yahei", sans-serif;
  background: radial-gradient(1200px 900px at 20% 10%, rgba(106,169,255,.18), transparent 60%),
              radial-gradient(1000px 800px at 90% 40%, rgba(92,225,168,.10), transparent 55%),
              var(--bg);
  color:var(--text);
}
.wrap{
  max-width: 980px;
  margin: 0 auto;
  padding: 32px 18px 64px;
  display:grid;
  grid-template-columns: 420px 1fr;
  gap: 26px;
  align-items:start;
}
@media (max-width: 860px){
  .wrap{grid-template-columns: 1fr;}
}
.card{
  background: linear-gradient(180deg, rgba(255,255,255,.02), transparent 35%), var(--card);
  border: 1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.head{display:flex;gap:14px;align-items:flex-start;margin-bottom:12px}
.logo{
  width:44px;height:44px;border-radius:12px;
  background: linear-gradient(135deg, rgba(106,169,255,.25), rgba(92,225,168,.18));
  border:1px solid rgba(255,255,255,.10);
  display:grid;place-items:center;
  font-weight:700;
}
h1{margin:0;font-size:18px;letter-spacing:.2px}
.sub{margin:6px 0 0;color:var(--muted);font-size:13px;line-height:1.45}
.banner{
  margin: 14px 0 16px;
  border: 1px dashed rgba(255,255,255,.18);
  background: rgba(255,106,106,.08);
  padding: 10px 12px;
  border-radius: 12px;
  color: #ffd4d4;
  font-size: 13px;
}
.form{display:flex;flex-direction:column;gap:12px}
.field{display:flex;flex-direction:column;gap:6px}
.field span{font-size:13px;color:var(--muted)}
.field input{
  width:100%;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.10);
  background: rgba(0,0,0,.22);
  color: var(--text);
  outline:none;
}
.field input:focus{border-color: rgba(106,169,255,.55); box-shadow: 0 0 0 4px rgba(106,169,255,.12)}
.check{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:13px}
.btn{
  margin-top: 4px;
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid rgba(106,169,255,.45);
  background: linear-gradient(180deg, rgba(106,169,255,.25), rgba(106,169,255,.12));
  color: var(--text);
  font-weight: 650;
  cursor: pointer;
}
.btn:hover{filter: brightness(1.05)}
.fine{margin:0;color:var(--muted);font-size:12px;line-height:1.45}
.result{margin-top: 10px; font-size: 13px; color: var(--muted)}
.result.ok{color: var(--ok)}
.result.bad{color: #ffd4d4}
.foot{margin-top: 14px; display:flex; gap:10px; align-items:center; color: var(--muted); font-size: 13px}
.foot a{color: var(--accent); text-decoration:none}
.foot a:hover{text-decoration:underline}
.dot{opacity:.7}
.note{
  border:1px solid rgba(255,255,255,.06);
  border-radius: var(--radius);
  background: rgba(255,255,255,.02);
  padding: 18px;
  color: var(--muted);
}
.note h2{margin:0 0 10px; font-size: 14px; color: var(--text)}
.note ul{margin:0; padding-left: 18px}
.note li{margin: 6px 0; line-height: 1.5}