:root{color:#17212b;font-synthesis:none;--green:#00a870;--green-dark:#087354;--ink:#17212b;--muted:#64717d;--line:#e4e9ed;--warm:#fff8ec;background:#f7f9fb;font-family:PingFang SC,Microsoft YaHei,system-ui,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{min-width:320px;margin:0}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit}.topbar{-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);z-index:20;background:#ffffffe6;border-bottom:1px solid #e4e9edbf;justify-content:space-between;align-items:center;height:72px;padding:0 max(24px,50vw - 580px);display:flex;position:sticky;top:0}.brand{color:var(--ink);align-items:center;gap:10px;font-weight:750;text-decoration:none;display:flex}.brand-mark{color:#fff;background:var(--green);border-radius:10px;place-items:center;width:32px;height:32px;font:800 18px/1 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