/* 组间 · 全站共用样式（页眉、页脚、正文页）。无外部字体、无 CDN。 */
:root{--bg:#EDE6D9;--paper:#F7F2E9;--fg:#1C1B19;--muted:rgba(28,27,25,.64);--accent:#B5573B;--line:rgba(28,27,25,.12);--shadow:rgba(28,27,25,.10)}
@media (prefers-color-scheme:dark){:root{--bg:#171614;--paper:#22201D;--fg:#EEE8DD;--muted:rgba(238,232,221,.66);--accent:#D27A5A;--line:rgba(238,232,221,.14);--shadow:rgba(0,0,0,.45)}}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
img,video{max-width:100%;height:auto}
.serif{font-family:"Songti SC","STSong","Noto Serif SC",Georgia,serif}

.site-header{max-width:1080px;margin:0 auto;padding:18px 20px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;color:var(--fg);font-weight:600;letter-spacing:.04em}
.brand:hover{text-decoration:none}.brand img{width:32px;height:32px;border-radius:8px}
.site-header nav{display:flex;gap:20px;font-size:14px}.site-header nav a{color:var(--muted)}

main.page{max-width:680px;margin:0 auto;padding:16px 20px 24px}
main.page h1{font:600 30px/1.3 "Songti SC","STSong","Noto Serif SC",Georgia,serif;margin:0 0 4px}
main.page h2{font-size:18px;margin:32px 0 8px}
main.page p,main.page li{color:var(--muted)}main.page strong{color:var(--fg)}main.page ul{padding-left:20px}

.site-footer{max-width:1080px;margin:0 auto;padding:28px 20px 56px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:6px 18px}
.site-footer a{color:var(--muted)}.site-footer a:hover{color:var(--fg)}
.site-footer .beian[hidden]{display:none}