body {
  font-family: system-ui, sans-serif;
  max-width: 42rem;
  margin: 0 auto;
  padding: 2rem 1rem;
  line-height: 1.65;
  color: #1a1a1a;
}
a {
  color: #0369a1;
}
.top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.lang-switch button {
  background: #f4f4f5;
  border: 1px solid #d4d4d8;
  padding: 0.35rem 0.7rem;
  border-radius: 6px;
  cursor: pointer;
  font: inherit;
}
.lang-switch button[aria-pressed="true"] {
  background: #e0f2fe;
  border-color: #0369a1;
}
.locale-en .lang-zh {
  display: none !important;
}
.locale-zh .lang-en {
  display: none !important;
}