:root { --brand: #2d6cdf; }
* { box-sizing: border-box; }
body {
  margin: 0; padding: 26px 30px; color: #1f2430;
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #eef3fb;                 /* 背景色生效 = CSS 加载成功 */
}
h1 { color: var(--brand); font-size: 21px; margin: 10px 0 14px; }
.badge {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  background: var(--brand); color: #fff; font-size: 12px;
}
.card {
  background: #fff; border: 1px solid #d9e2f2; border-radius: 10px;
  padding: 16px 18px; max-width: 580px;
}
ul { padding-left: 18px; line-height: 1.9; margin: 10px 0; }
code { background: #eaf0fb; padding: 1px 5px; border-radius: 4px; }
.ok { color: #12805c; font-weight: 600; }
.links a { margin-right: 14px; }