html[lang="en"] body [lang="zh-Hans"]:not(option),html[lang="zh-Hans"] body [lang="en"]:not(option),[hidden]{display:none!important}
:root{color-scheme:light dark;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65;color:#202020;background:#fafaf8}*{box-sizing:border-box}body{margin:0}header,main,footer{max-width:820px;margin:auto;padding:24px}header{display:flex;justify-content:space-between;align-items:center;gap:24px;border-bottom:1px solid #ddd}.brand{display:flex;align-items:center;gap:10px;font-size:24px;font-weight:650;text-decoration:none}.brand img{background:#fff;border-radius:12px}nav{display:flex;flex-wrap:wrap;gap:8px 18px}a{color:inherit;text-underline-offset:4px}nav a{padding:6px 0}h1{font-size:clamp(28px,6vw,40px);line-height:1.2;letter-spacing:-.025em}h2{font-size:23px;margin-top:32px}h3{font-size:18px;margin-top:28px}p,li{overflow-wrap:anywhere}section{scroll-margin-top:24px}.meta,footer{color:#666}.draft{border:2px solid #b17800;padding:16px;border-radius:12px;background:#fff4ce;color:#4b3100}code{font-size:.95em;padding:2px 5px;background:#eee;border-radius:4px}footer{border-top:1px solid #ddd;font-size:14px}a:focus-visible{outline:3px solid #638a74;outline-offset:4px}@media(max-width:600px){header{align-items:flex-start;flex-direction:column;gap:12px}header,main,footer{padding:20px}nav a{min-height:44px;display:inline-flex;align-items:center}}@media(prefers-color-scheme:dark){:root{background:#171918;color:#eceeea}.meta,footer{color:#acb3ad}header,footer{border-color:#444}code{background:#303530}}@media print{header nav{display:none}body{background:white;color:black}a{color:black}}

pre{white-space:pre-wrap;overflow-wrap:anywhere;padding:16px;border:1px solid #8885;border-radius:8px}pre code{background:transparent;padding:0}

.language{display:flex;align-items:center;gap:8px;white-space:nowrap;font-size:14px}.language select{font:inherit;color:inherit;background:transparent;border:1px solid #8888;border-radius:6px;min-height:44px;padding:6px 10px}select:focus-visible{outline:3px solid #638a74;outline-offset:4px}header{flex-wrap:wrap}@media print{.language{display:none}}