:root {
  --bg: #fbfaf7;
  --card: #fff;
  --text: #24211c;
  --muted: #7c766c;
  --line: #e6e1d7;
  --link: #9a5b2c;
  --link-hi: #7d4620;
  --accent: #f0ece2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16150f;
    --card: #1e1c16;
    --text: #e8e3d8;
    --muted: #948d80;
    --line: #302c23;
    --link: #d69a63;
    --link-hi: #edb47a;
    --accent: #26231b;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.85;
  -webkit-text-size-adjust: 100%;
}

.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }

/* 页头 */
.site-head {
  border-bottom: 1px solid var(--line);
  padding: 26px 0 18px;
  margin-bottom: 34px;
}
.site-head .wrap { display: flex; align-items: baseline; flex-wrap: wrap; gap: 14px 22px; }
.site-name {
  font-size: 20px; font-weight: 700; letter-spacing: .5px;
  color: var(--text); text-decoration: none; white-space: nowrap;
}
.site-name span { color: var(--link); }
.nav { display: flex; gap: 18px; margin-left: auto; flex-wrap: wrap; }
.nav a {
  color: var(--muted); text-decoration: none; font-size: 15px;
  padding-bottom: 2px; border-bottom: 1px solid transparent;
}
.nav a:hover { color: var(--text); }
.nav a.on { color: var(--text); border-bottom-color: var(--link); }

/* 简介 */
.intro {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 20px 22px; margin-bottom: 38px; font-size: 15px; color: var(--muted);
}
.intro p { margin: 0; }
.intro b { color: var(--text); }

/* 文章列表 */
.post-list { list-style: none; margin: 0; padding: 0; }
.post-list li { padding: 20px 0; border-bottom: 1px dashed var(--line); }
.post-list li:last-child { border-bottom: none; }
.post-list h2 { font-size: 19px; margin: 0 0 6px; font-weight: 650; line-height: 1.5; }
.post-list h2 a { color: var(--text); text-decoration: none; }
.post-list h2 a:hover { color: var(--link); }
.meta { font-size: 13px; color: var(--muted); margin: 0 0 8px; }
.meta .tag {
  display: inline-block; background: var(--accent); color: var(--muted);
  border-radius: 4px; padding: 1px 8px; margin-left: 8px; font-size: 12px;
}
.excerpt { margin: 0; font-size: 15px; color: var(--muted); }

/* 正文 */
.article h1 { font-size: 26px; line-height: 1.45; margin: 0 0 10px; }
.article .meta { margin-bottom: 30px; }
.article h2 {
  font-size: 19px; margin: 36px 0 12px; padding-left: 11px;
  border-left: 3px solid var(--link);
}
.article p { margin: 0 0 18px; }
.article a { color: var(--link); }
.article a:hover { color: var(--link-hi); }
.article ul, .article ol { margin: 0 0 18px; padding-left: 24px; }
.article li { margin-bottom: 7px; }
.article blockquote {
  margin: 0 0 18px; padding: 12px 16px; background: var(--card);
  border-left: 3px solid var(--line); color: var(--muted); border-radius: 0 8px 8px 0;
}
.article blockquote p:last-child { margin-bottom: 0; }
.article code {
  background: var(--accent); border-radius: 4px; padding: 2px 6px;
  font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 14px;
}
.article pre {
  background: var(--card); border: 1px solid var(--line); border-radius: 8px;
  padding: 14px 16px; overflow-x: auto; font-size: 14px; line-height: 1.65;
  margin: 0 0 18px;
}
.article pre code { background: none; padding: 0; }
.article img { max-width: 100%; border-radius: 8px; }
.article hr { border: none; border-top: 1px solid var(--line); margin: 32px 0; }

.post-nav {
  margin-top: 46px; padding-top: 20px; border-top: 1px solid var(--line);
  font-size: 15px;
}
.post-nav a { color: var(--link); text-decoration: none; }
.post-nav a:hover { text-decoration: underline; }

/* 页脚 */
.site-foot {
  margin-top: 60px; padding: 22px 0 40px; border-top: 1px solid var(--line);
  font-size: 13px; color: var(--muted);
}
.site-foot .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.site-foot a { color: var(--muted); }

@media (max-width: 520px) {
  body { font-size: 15.5px; }
  .site-head { padding: 20px 0 14px; margin-bottom: 26px; }
  .site-head .wrap { gap: 10px 16px; }
  .nav { margin-left: 0; width: 100%; gap: 16px; }
  .article h1 { font-size: 22px; }
}