:root{--bg:#f5f3ec;--paper:#fffefa;--ink:#283a2e;--muted:#788076;--green:#446149;--line:#e7e8df;--soft:#edf0e6;--serif:"Songti SC","STSong","Noto Serif CJK SC",serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.5;cursor:wait}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #9baf7c;outline-offset:3px}button{transition:background .15s,transform .15s}button:active{transform:translateY(1px)}.shell{max-width:1140px;margin:auto;padding:0 40px}.topbar{display:flex;align-items:center;justify-content:space-between;padding:27px 0;border-bottom:1px solid 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