/* GEO 供给静态站基础样式 */
:root {
  color-scheme: light;
  --text: #1a1a1a;
  --muted: #666;
  --link: #1558d6;
  --border: #e8e8e8;
  --bg: #fafafa;
  --content-bg: #fff;
  --success-bg: #ecfdf3;
  --success-text: #067647;
  --info-bg: #eff6ff;
  --info-text: #175cd3;
  --max: 48rem;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--content-bg);
  padding: 0.75rem 1.25rem;
}

.site-brand {
  font-weight: 700;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.site-header a {
  color: var(--link);
  text-decoration: none;
  font-size: 0.9rem;
}

.site-header a:hover {
  text-decoration: underline;
}

main.article,
main.index {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
  background: var(--content-bg);
  min-height: 60vh;
}

main.index h1 {
  font-size: 1.5rem;
  margin: 0 0 1rem;
}

.site-kicker {
  margin: 0 0 0.5rem;
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

main.index ul {
  padding-left: 1.25rem;
}

main.index li {
  margin: 0.5rem 0;
}

.article h1 {
  font-size: 1.75rem;
  line-height: 1.35;
  margin: 0 0 1.25rem;
}

.article h2 {
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}

.article h3 {
  font-size: 1.05rem;
  margin: 1.5rem 0 0.5rem;
}

.article p,
.article li {
  margin: 0.65rem 0;
}

.article ul,
.article ol {
  padding-left: 1.5rem;
}

.article a {
  color: var(--link);
}

.article img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

.article-meta {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0 0 1.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg);
  border-radius: 6px;
}

.article-footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--muted);
}

.article-footer a {
  color: var(--link);
}

.alt-md {
  display: inline-block;
  margin-left: 0.5rem;
  font-size: 0.8rem;
}

.origin-badge {
  display: inline-block;
  margin: 0 0 1rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
}

.origin-original,
.origin-owned {
  color: var(--success-text);
  background: var(--success-bg);
}

.origin-reference {
  color: var(--info-text);
  background: var(--info-bg);
}

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }
}