:root {
  --bg: #0f172a;
  --card: #1e293b;
  --line: #334155;
  --fg: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.6;
}

.page { max-width: 880px; margin: 0 auto; padding: 48px 20px 64px; }

.hero h1 { font-size: 2rem; margin: 0 0 8px; }
.hero .subtitle { color: var(--accent); margin: 0 0 32px; letter-spacing: .06em; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 24px;
}

.card h2 { margin-top: 0; }

.muted { color: var(--muted); }

button {
  background: var(--accent);
  color: #06263a;
  border: 0;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 1rem;
  cursor: pointer;
}

button:hover { filter: brightness(1.1); }

footer {
  margin-top: 32px;
  display: flex;
  gap: 20px;
  font-size: .9rem;
}

a { color: var(--muted); }
a:hover { color: var(--accent); }

.badge {
  display: inline-block;
  font-size: .72rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 2px 10px;
  margin-left: 8px;
  vertical-align: middle;
}