:root{--paper: #fbf6ea;--ink: #2a2620;--muted: #7a7266;--blue: #2f6fe0;--red: #e0432f;--yellow: #ffc928;--line: #e3dac6}*{box-sizing:border-box}html,body,#root{margin:0;height:100%;background:#d9ccb4;overscroll-behavior:none}body{font-family:Trebuchet MS,Avenir Next,system-ui,-apple-system,PingFang SC,Microsoft YaHei,sans-serif;color:var(--ink);-webkit-tap-highlight-color:transparent}.fb{position:fixed;inset:0;overflow:hidden;font-size:14px;user-select:none;-webkit-user-select:none}.fb .viewport{position:absolute;inset:0}.fb canvas{display:block;position:absolute;inset:0;touch-action:none}.fb button{font:inherit;color:inherit;border:0;border-radius:12px;padding:10px 14px;min-height:44px;background:#fff;box-shadow:0 3px #cfc5ae,0 0 0 1px #e3dac6 inset;cursor:pointer;transition:transform .06s,box-shadow .06s}.fb button:active:not(:disabled){transform:translateY(2px);box-shadow:0 1px #cfc5ae,0 0 0 1px #e3dac6 inset}.fb button:disabled{opacity:.5;cursor:default}.fb 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