:root{--ink:#172323;--muted:#526363;--green:#116647;--lime:#ccf474;--line:#dce4df;--paper:#f7f8f5;--ease:cubic-bezier(.23,1,.32,1)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}p{line-height:1.7;margin:0 0 1em}h1,h2,h3,h4{margin:0;overflow-wrap:anywhere}h1{font-size:clamp(42px,4.9vw,72px);line-height:1.08;letter-spacing:-.055em;font-weight:600}h2{font-size:clamp(30px,3.2vw,44px);line-height:1.15;letter-spacing:-.04em;font-weight:600}h3{font-size:23px;line-height:1.3;letter-spacing:-.025em}img{max-width:100%;object-fit:contain}a,summary{touch-action:manipulation}a:focus-visible,summary:focus-visible{outline:3px solid var(--green);outline-offset:5px;border-radius:5px}.shell{width:min(1200px,calc(100% - 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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
/* Reserve a fixed icon slot so the open-state rotation stays inside the summary. */
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/* Compact language dialog over the actual home page. */
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