@layer reset,base,layout,components,responsive;@layer reset{*{box-sizing:border-box}body,h1,h2,h3,p,ul{margin:0}button,a{-webkit-tap-highlight-color:transparent}img,svg{display:block;max-width:100%}button{font:inherit}a{color:inherit;text-decoration:none}ul{padding:0;list-style:none}}@layer base{:root{--bg:#f8f8f3;--ink:#242b2b;--muted:#626965;--blue:#284ee8;--line:#dddfd7;--accent:#284ee8;--tint:#edf0fc;color-scheme:light;font-family:Arial,Microsoft YaHei,PingFang SC,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none;scroll-behavior:smooth;scroll-padding-top:108px}body{font-size:16px;line-height:1.65}::selection{background:#d6e0ff;color:#172858}a,button{touch-action:manipulation}a:focus-visible,button:focus-visible{outline:3px solid var(--blue);outline-offset:5px;border-radius:3px}main:focus{outline:none}h1,h2,h3{font-weight:500;line-height:1.12;letter-spacing:-.045em;text-wrap:balance}h1{font-size:clamp(44px,5.1vw,72px)}h2{font-size:clamp(32px,3.1vw,44px)}h3{font-size:26px}p{color:var(--muted)}em{font-style:normal;color:var(--blue)}.mono,.eyebrow{font-family:Cascadia Code,SFMono-Regular,Consolas,monospace}.eyebrow{font-size:11px;line-height:1.6;letter-spacing:1.5px;font-weight:500;text-transform:uppercase;color:var(--muted)}.muted{color:var(--muted)}.blue{--accent:#284ee8;--tint:#edf0fc}.green{--accent:#14705c;--tint:#e7f1eb}.orange{--accent:#985015;--tint:#f7ecde}[lang=zh-CN] h1{line-height:1.3;letter-spacing:-.035em}[lang=zh-CN] h2{line-height:1.35}[lang=zh-CN] .eyebrow{letter-spacing:1px}}@layer layout{.wrap,.header-inner{width:min(1180px,calc(100% - 96px));margin-inline:auto}.site-header{position:sticky;top:0;z-index:20;border-bottom:1px solid 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