:root { color-scheme: light; }
body {
  margin: 0;
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", sans-serif;
  color: #111827;
  background: #f7f8fa;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}
h1 { font-size: 24px; margin: 0 0 8px; }
.lead { color: #6b7280; margin-bottom: 28px; }
h2 { font-size: 17px; margin: 24px 0 8px; }
p { margin: 0 0 10px; color: #374151; }
.foot { margin-top: 40px; color: #9ca3af; font-size: 13px; }
a { color: #2563eb; }
.crumb { color: #9ca3af; font-size: 13px; margin: 0 0 16px; }
.cta {
  display: inline-block;
  margin: 8px 0 16px;
  padding: 10px 16px;
  border-radius: 10px;
  background: #1783ff;
  color: #fff;
  text-decoration: none;
  font-weight: 600;
}