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*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:85px}body{margin:0;background:var(--bg);color:var(--body);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.8}a{color:var(--blue);text-underline-offset:3px}a:hover{color:#0c678f}button{font:inherit;cursor:pointer}img{max-width:100%;height:auto}.container{width:min(100% - 48px,1160px);margin-inline:auto}.reading{width:min(100%,800px)}.skip-link{position:absolute;left:15px;top:-100px;z-index:100;background:#fff;padding:10px}.skip-link:focus{top:10px}h1,h2,h3{color:var(--title);line-height:1.38;margin:0 0 18px}h1{font-size:clamp(30px,3.4vw,40px);letter-spacing:-.025em}h2{font-size:clamp(22px,2.5vw,26px)}h3{font-size:19px}p{margin:0 0 16px}section{margin-block:42px}ul,ol{padding-left:1.45em}li{margin:5px 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