html {
  color-scheme: light;
}

html[data-lang="en"] [data-lang="zh"],
html[data-lang="zh"] [data-lang="en"] {
  display: none;
}

body {
  margin: 0;
  background: #fff;
  color: #111;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  line-height: 1.68;
}

a {
  color: #111;
  text-decoration-color: #999;
  text-underline-offset: 3px;
}

a:hover {
  text-decoration-color: #111;
}

.site-header {
  border-bottom: 1px solid #e6e6e6;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: 880px;
  margin: 0 auto;
  padding: 18px 24px;
}

.brand {
  font-weight: 700;
  text-decoration: none;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  color: #555;
  font-size: 14px;
}

.nav a {
  color: #555;
  text-decoration: none;
}

.nav a[aria-current="page"],
.nav a:hover {
  color: #111;
}

.language {
  margin-left: 6px;
  padding-left: 14px;
  border-left: 1px solid #ddd;
}

main {
  max-width: 760px;
  margin: 54px auto 76px;
  padding: 0 24px;
}

article {
  font-size: 16px;
}

.eyebrow {
  margin: 0 0 12px;
  color: #666;
  font-size: 14px;
}

h1 {
  margin: 0;
  font-size: clamp(34px, 7vw, 52px);
  line-height: 1.12;
  letter-spacing: 0;
}

.updated {
  margin: 16px 0 34px;
  color: #666;
  font-size: 14px;
}

h2 {
  margin: 34px 0 10px;
  padding-top: 4px;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: 0;
}

p {
  margin: 0 0 16px;
}

ul {
  margin: 0 0 18px;
  padding-left: 22px;
}

li + li {
  margin-top: 6px;
}

.contact {
  margin: 20px 0 28px;
  padding: 18px 0;
  border-top: 1px solid #e6e6e6;
  border-bottom: 1px solid #e6e6e6;
}

.small {
  color: #666;
  font-size: 14px;
}

.site-footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 24px 42px;
  border-top: 1px solid #e6e6e6;
  color: #666;
  font-size: 14px;
}

@media (max-width: 680px) {
  .header-inner {
    display: block;
  }

  .nav {
    justify-content: flex-start;
    margin-top: 12px;
  }

  .language {
    margin-left: 0;
    padding-left: 0;
    border-left: 0;
  }

  main {
    margin-top: 38px;
  }
}