* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: linear-gradient(120deg, #0f172a, #1e293b);
  color: #e2e8f0;
  min-height: 100vh;
  display: grid;
  place-items: center;
}

.card {
  width: min(820px, 92vw);
  background: rgba(15, 23, 42, 0.75);
  border: 1px solid rgba(148, 163, 184, 0.3);
  border-radius: 14px;
  padding: 28px;
}

h1 {
  margin-top: 0;
  margin-bottom: 14px;
}

a {
  color: #7dd3fc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  color: #fbbf24;
}