:root{--ink:#1f2a1f;--muted:#5c6b5c;--green:#2f5d3a;--paper:#f7f5ef;--line:#dfe3d8}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
main{max-width:760px;margin:0 auto;padding:32px 20px 64px}header{display:flex;align-items:center;gap:10px;margin-bottom:8px}
header a{color:var(--green);font-weight:600;text-decoration:none;font-size:18px}nav{display:flex;gap:16px;flex-wrap:wrap;margin:8px 0 28px;font-size:14px}
nav a{color:var(--muted)}h1{font-size:28px;line-height:1.25;margin:0 0 6px}h2{font-size:19px;margin:30px 0 8px}p,li{color:var(--ink)}
.meta{color:var(--muted);font-size:14px}.lang{border-top:1px solid var(--line);margin-top:44px;padding-top:24px}a{color:var(--green)}