:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #1f2933;
  --muted: #64748b;
  --accent: #f6821f;
  --border: #e2e8f0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 15% 20%, rgba(246, 130, 31, 0.12), transparent 40%),
    var(--bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
}

.card {
  width: min(560px, calc(100vw - 2.5rem));
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.08);
}

.badge {
  display: inline-block;
  margin: 0 0 0.9rem;
  padding: 0.3rem 0.7rem;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: #9a3412;
  background: #fff1e6;
  border-radius: 999px;
}

h1 {
  margin: 0 0 0.75rem;
  font-size: 1.8rem;
  line-height: 1.25;
}

.lead {
  margin: 0 0 1.6rem;
  color: var(--muted);
  line-height: 1.7;
}

.meta {
  border-top: 1px solid var(--border);
  padding-top: 1.1rem;
}

.meta p {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin: 0.55rem 0;
  font-size: 0.92rem;
}

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

code {
  font-size: 0.85em;
  color: var(--accent);
  background: #fff7ed;
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
}

.foot {
  margin: 1.4rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}