:root {
  --bg: #0f172a;
  --panel: #111827;
  --card: #0b1220;
  --border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --accent-2: #22c55e;
  --danger: #f97316;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(56,189,248,.18), transparent),
              radial-gradient(1000px 500px at 100% 0%, rgba(34,197,94,.12), transparent),
              var(--bg);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.nav .brand {
  font-weight: 700;
  letter-spacing: 0.5px;
}

.nav .links {
  display: flex;
  gap: 12px;
  font-size: 14px;
}

.nav .links a {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(17,24,39,.6);
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
  margin-bottom: 28px;
}

.panel {
  background: linear-gradient(145deg, rgba(17,24,39,.9), rgba(11,18,32,.95));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  box-shadow: 0 12px 40px rgba(0,0,0,.35);
}

.title {
  font-size: 28px;
  margin: 0 0 12px;
}

.sub {
  color: var(--muted);
  line-height: 1.6;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--card);
  padding: 16px;
}

.card h3 { margin: 0 0 8px; }

.badge {
  display: inline-block;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.form {
  display: grid;
  gap: 12px;
}

label {
  font-size: 13px;
  color: var(--muted);
}

input, select, textarea, button {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text);
  font-size: 14px;
}

button {
  background: linear-gradient(135deg, rgba(56,189,248,.85), rgba(59,130,246,.9));
  border: none;
  cursor: pointer;
  font-weight: 600;
}

button.secondary {
  background: rgba(17,24,39,.9);
  border: 1px solid var(--border);
}

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.result {
  margin-top: 16px;
  white-space: pre-wrap;
  font-family: Consolas, "Courier New", monospace;
  background: #0b1220;
  border-radius: 12px;
  border: 1px solid var(--border);
  padding: 14px;
  font-size: 13px;
}

.pill {
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(34,197,94,.15);
  color: var(--accent-2);
  font-size: 12px;
}

.footer {
  margin-top: 28px;
  color: var(--muted);
  font-size: 12px;
}