body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui,
    "Helvetica Neue", "PingFang SC", "PingFang TC", "Heiti SC", "Heiti TC",
    Arial, sans-serif;
  line-height: 1.6;
  margin: 0;
  padding: 0;
  background-color: #ffffff;
  color: #111111;
}
header {
  background-color: #ffffff;
  padding: 1.5rem 1.25rem;
  border-bottom: 1px solid #e5e5e5;
}
.lj-header-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-start;
}
.lj-logo-link {
  display: inline-flex;
  align-items: center;
}
.lj-logo-link img {
  display: block;
}
.lj-header-logo {
  height: 48px;
  width: auto;
}
main {
  max-width: 860px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  background-color: #ffffff;
}
h1, h2, h3 { color: #111111; }
h1 { margin-top: 0; font-size: 1.8rem; }
h2 { font-size: 1.25rem; margin-top: 2rem; }
p { margin: 0.4rem 0 0.6rem; font-size: 0.98rem; color: #333333; }
ul { padding-left: 1.25rem; }
.muted { color: #666666; font-size: 0.9rem; }
.section-divider {
  border: 0;
  border-top: 1px solid #e5e5e5;
  margin: 2rem 0;
}
a { color: #0070c9; text-decoration: none; }
a:hover { color: #005a9e; text-decoration: underline; }
.lang-switch { font-size: 0.9rem; margin-bottom: 0.75rem; }
.lang-switch a { margin-right: 0.5rem; }

/* Homepage cards */
.doc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}
.doc-card {
  border: 1px solid #e5e5e5;
  border-radius: 10px;
  padding: 1.25rem 1.25rem 1.5rem;
  background-color: #fafafa;
  color: #333333;
}
.doc-type { font-weight: 600; margin-bottom: 0.25rem; }
.doc-description { color: #333333; margin-bottom: 0.8rem; }
.doc-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  font-size: 0.95rem;
  color: #333333;
}
.doc-links span { color: #666666; }
.legal-note { margin-top: 2rem; color: #666666; }
.page-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  font-size: 0.85rem;
  color: #666666;
  border-top: 1px solid #e5e5e5;
}

.toc {
  background-color: #fafafa;
  border: 1px solid #e5e5e5;
  padding: 0.8rem 1rem;
  border-radius: 8px;
  font-size: 0.95rem;
}
.toc a {
  color: #0070c9;
}
.toc a:hover {
  color: #005a9e;
  text-decoration: underline;
}

footer {
  margin: 0 auto;
  max-width: 860px;
  padding: 1rem 1.25rem 2rem;
  font-size: 0.85rem;
  color: #666666;
  text-align: center;
}

@media (max-width: 600px) {
  header {
    padding: 1.25rem 1rem;
  }
  main {
    padding: 1.25rem 1rem 2.5rem;
  }
  h1 {
    font-size: 1.4rem;
  }
  h2 {
    font-size: 1.1rem;
    margin-top: 1.5rem;
  }
  .lj-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .lj-header-logo {
    height: 40px;
  }
  .doc-grid {
    grid-template-columns: 1fr;
  }
}

/* 強制白底：覆蓋系統深色偏好 */
@media (prefers-color-scheme: dark) {
  body,
  header,
  main,
  footer,
  .doc-card,
  .toc {
    background-color: #ffffff !important;
    color: #111111 !important;
    border-color: #e5e5e5 !important;
  }
  .page-footer,
  .doc-links span,
  .muted,
  .doc-description {
    color: #666666 !important;
    border-color: #e5e5e5 !important;
  }
  a {
    color: #0070c9 !important;
  }
  a:hover {
    color: #005a9e !important;
  }
}