* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  color: #1f2937;
  background: #f5f7fb;
  line-height: 1.75;
}

.page {
  max-width: 920px;
  margin: 0 auto;
  padding: 32px 18px 48px;
}

.doc {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, .06);
}

h1 {
  margin: 0 0 10px;
  font-size: 28px;
}

h2 {
  margin: 28px 0 8px;
  font-size: 18px;
}

p,
li {
  font-size: 15px;
}

.meta {
  color: #667085;
  font-size: 14px;
  border-bottom: 1px solid #eef2f6;
  padding-bottom: 16px;
}

.notice {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 12px 14px;
  color: #475467;
}

a {
  color: #2563eb;
}

@media (max-width: 640px) {
  .doc {
    padding: 22px;
  }
}