:root{--bg:#f2f2ef;--surface:#fff;--surface-2:#f7f7f5;--ink:#111214;--ink-2:#373a3f;--muted:#70747a;--line:#d8d8d3;--line-strong:#9d9e9a;--teal:#002fa7;--teal-ink:#00227a;--teal-soft:#e8edfa;--amber:#55595e;--amber-soft:#ededeb;--rose:#b42318;--rose-soft:#fbeceb;--radius:0px;--shadow:none}*,:before,:after{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;font-family:Helvetica Neue,Helvetica,Arial,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Source Han Sans SC,Noto Sans CJK SC,sans-serif;font-size:14px;line-height:1.5}h1,h2,h3{letter-spacing:0;line-height:1.3}button,input,textarea,select{font:inherit;color:inherit}img{display:block}a{color:var(--teal-ink)}.app{min-height:100dvh}.topbar{z-index:20;background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0}.topbar-inner{align-items:center;gap:18px;max-width:1120px;height:62px;margin:0 auto;padding:0 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