:root{--ink:#18211d;--muted:#69736e;--green:#15634b;--green-dark:#0c4635;--lime:#d7f55c;--paper:#f4f2ec;--card:#fffefa;--line:#deddd6}*{box-sizing:border-box}html{background:#e7e5df}body{margin:0;color:var(--ink);background:var(--paper);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif}button,input,select{font:inherit}button{-webkit-tap-highlight-color:transparent}.app-shell{min-height:100dvh;max-width:760px;margin:0 auto;padding-bottom:96px;background:var(--paper);box-shadow:0 0 60px #00000014}.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:12px;min-height:76px;padding:12px 20px;border-bottom:1px solid #18211d14;background:#f4f2eceb;backdrop-filter:blur(16px)}.brand-mark,.mini-ball{display:grid;place-items:center;flex:0 0 auto;color:#fff;background:#151816;border-radius:50%;box-shadow:inset -4px -5px 9px #00000047,inset 3px 3px 6px #fff3}.brand-mark{width:44px;height:44px}.brand-mark 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