:root{--font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;--color-text: #202020;--color-muted: #686868;--color-background: #ffffff;--color-border: #d9d9d9;--space-1: .5rem;--space-2: 1rem;--space-3: 1.5rem;--space-4: 2rem;--content-narrow: 42rem;--content-wide: 72rem;--border-width: 1px}*,*:before,*:after{box-sizing:border-box}html{font-family:var(--font-sans);color:var(--color-text);background:var(--color-background);line-height:1.6;-webkit-text-size-adjust:100%}body{margin:0}main{width:min(calc(100% - 2 * var(--space-2)),var(--content-wide));margin-inline:auto;padding-block:var(--space-4)}a{color:inherit}h1,h2,h3,p{margin-block-start:0}:focus-visible{outline:2px solid currentColor;outline-offset:3px}