:root{--paper: #fbf7ef;--paper-strong: #fffdf8;--ink: #221f1c;--muted: #716b62;--soft: #a49b8f;--line: rgba(46, 39, 31, .14);--red: #b42121;--red-dark: #951d1d;--red-soft: rgba(180, 33, 33, .1);--green: #63735d;--shadow: 0 18px 50px rgba(54, 44, 32, .12);--radius: 8px;color:var(--ink);background:#efe7db;font-family:"Noto Serif SC",Songti SC,STSong,SimSun,Microsoft YaHei,serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100vh;overflow-x:hidden}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.68}#root{min-height:100vh}.app-shell{min-height:100vh;overflow-x:hidden;background:linear-gradient(#fbf7efad,#fbf7efeb),url(/assets/ink-paper-bg.png) top center / cover no-repeat}.mobile-canvas{width:100%;min-height:100vh;margin:0;padding:28px 20px 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