:root {
  --fg: #1f2328;
  --muted: #6b7280;
  --bg: #ffffff;
  --line: #e5e7eb;
  --accent: #2563eb;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 0 1.25rem;
  max-width: 46rem;
  margin-inline: auto;
  font-family: -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
  color: var(--fg);
  background: var(--bg);
}
.site-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}
.brand { font-size: 1.15rem; font-weight: 700; text-decoration: none; color: var(--fg); }
.site-header nav a { margin-left: 1rem; text-decoration: none; color: var(--muted); }
.site-header nav a:hover { color: var(--accent); }
main { padding: 2rem 0; }
h1 { font-size: 1.6rem; }
a { color: var(--accent); }
.post-list { list-style: none; padding: 0; }
.post-list li { padding: 1rem 0; border-bottom: 1px solid var(--line); }
.post-list a { font-size: 1.15rem; font-weight: 600; text-decoration: none; }
.post-list time { display: block; font-size: .85rem; color: var(--muted); }
.post-list p { margin: .35rem 0 0; color: var(--muted); }
.post time { display: block; color: var(--muted); font-size: .9rem; margin-bottom: 1.5rem; }
.site-footer { padding: 2rem 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .875rem; }
.site-footer p { margin: .25rem 0; }
.site-footer .beian a { color: var(--muted); text-decoration: none; }
.site-footer .beian a:hover { color: var(--accent); text-decoration: underline; }
.site-footer .beian span { margin: 0 .4rem; }