/* 自有站样式 —— 单文件，无外部依赖、无外部字体（避免第三方请求与字体授权问题） */

:root {
  --bg: #fbfbfa;
  --fg: #1d1d1f;
  --muted: #6b6b70;
  --line: #e4e4e2;
  --accent: #1a5fb4;
  --code-bg: #f2f2f0;
  --maxw: 38rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16171a;
    --fg: #e8e8ea;
    --muted: #9a9aa2;
    --line: #2c2e33;
    --accent: #7aa7e0;
    --code-bg: #202226;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans",
               "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
}

.site-head {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.2rem 1.25rem 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.2rem;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-weight: 650;
  font-size: 1.02rem;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.site-head nav { display: flex; gap: 1.1rem; }

.site-head nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}

.site-head nav a:hover { color: var(--accent); }

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.4rem 1.25rem 3rem;
}

h1 {
  font-size: 1.72rem;
  line-height: 1.28;
  letter-spacing: -0.02em;
  margin: 0 0 0.9rem;
}

h2 {
  font-size: 1.22rem;
  line-height: 1.35;
  margin: 2.6rem 0 0.8rem;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.03rem;
  margin: 1.9rem 0 0.6rem;
}

p { margin: 0 0 1.15rem; }

a { color: var(--accent); }

.lede {
  color: var(--muted);
  font-size: 1.02rem;
  margin-bottom: 2.4rem;
}

.meta {
  color: var(--muted);
  font-size: 0.83rem;
  margin: 0 0 0.7rem;
  font-variant-numeric: tabular-nums;
}

.tag {
  display: inline-block;
  margin-left: 0.35rem;
  padding: 0.05rem 0.45rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.75rem;
}

.post-list { list-style: none; margin: 0; padding: 0; }

.post-list li {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}

.post-list li:first-child { padding-top: 0; }

.post-link {
  display: block;
  font-size: 1.16rem;
  font-weight: 600;
  line-height: 1.35;
  color: var(--fg);
  text-decoration: none;
  letter-spacing: -0.01em;
  margin-bottom: 0.35rem;
}

.post-link:hover { color: var(--accent); }

.summary { color: var(--muted); font-size: 0.94rem; margin: 0; }

blockquote {
  margin: 1.6rem 0;
  padding: 0.1rem 0 0.1rem 1.1rem;
  border-left: 3px solid var(--line);
  color: var(--muted);
}

blockquote p { margin: 0.6rem 0; }

pre {
  background: var(--code-bg);
  padding: 0.9rem 1rem;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.86rem;
  line-height: 1.6;
  margin: 1.4rem 0;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
               "Liberation Mono", monospace;
  font-size: 0.88em;
}

p code, li code {
  background: var(--code-bg);
  padding: 0.12em 0.36em;
  border-radius: 4px;
}

ul, ol { padding-left: 1.35rem; margin: 0 0 1.15rem; }
li { margin-bottom: 0.45rem; }

hr { border: 0; border-top: 1px solid var(--line); margin: 2.6rem 0; }

.backlink { margin-top: 3rem; font-size: 0.9rem; }

.site-foot {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1.6rem 1.25rem 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
}

.site-foot p { margin: 0.3rem 0; }
.muted { color: var(--muted); }

@media (max-width: 480px) {
  body { font-size: 16px; }
  h1 { font-size: 1.5rem; }
  main { padding-top: 1.8rem; }
}