* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: #f6f7fb;
  color: #1f2937;
}

.container {
  max-width: 860px;
  margin: 40px auto;
  padding: 32px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
}

h1 {
  margin-top: 0;
  font-size: 30px;
}

h2 {
  margin-top: 28px;
  font-size: 20px;
}

p, li {
  line-height: 1.7;
}

a {
  color: #0f4cbd;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.muted {
  color: #6b7280;
}