body {
  margin: 0;
  font-family: "PingFang SC", "Noto Sans SC", sans-serif;
  color: #0a0e27;
  background: #f8f9fc;
  line-height: 1.7;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}
a {
  color: #c48a2a;
}
h1 {
  font-size: 1.8rem;
  line-height: 1.3;
  margin: 0 0 12px;
}
h2 {
  font-size: 1.2rem;
  margin: 32px 0 12px;
}
.lead {
  font-size: 1.05rem;
  color: #374151;
}
.formula {
  margin: 20px 0;
  padding: 16px 20px;
  background: #0a0e27;
  color: #fff;
  border-radius: 12px;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}
.note {
  color: #6b7280;
  font-size: 0.9rem;
}
.hub-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  margin: 0 0 28px;
  font-size: 0.88rem;
}
.cta {
  display: inline-block;
  margin: 8px 12px 0 0;
}
.reads {
  margin: 0;
  padding-left: 1.2em;
}