:root{--paper:#e9ebe6;--card:#f7f8f4;--ink:#1d2a24;--main:#2f5145;--spot:#c98b86;--line:#d3ddd6;--sub:#4c5d55;--muted:#59655d;--spot-ink:#a0605a;--proof:#7a5a52;--on-main:#f7f8f4;--code-bg:#eef1ec;--f-title:"Chiron GoRound TC", "PingFang TC", system-ui, sans-serif;--f-body:"Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;--f-code:ui-monospace, "SFMono-Regular", Consolas, monospace;--rad:14px;--gutter:16px;--measure:38rem;--ease-out:cubic-bezier(.23, 1, .32, 1);--ease-soft:cubic-bezier(.22, 1, .36, 1);color-scheme:light}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}html,body{background:var(--paper);color:var(--ink);margin:0}body{font-family:var(--f-body);padding-inline:var(--gutter);background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.11 0 0 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