:root{--bg:#f4f6f8;--panel:#fff;--ink:#15211e;--muted:#72807b;--line:#e6ebe8;--green:#176b55;--lime:#b9f35d;--cyan:#2d8f91;--violet:#7566d7;--amber:#cb8332;--rose:#bd5a68}*{box-sizing:border-box}html{background:var(--bg)}body{background:var(--bg);color:var(--ink);margin:0;font-family:Arial,PingFang SC,Microsoft YaHei,sans-serif}button,input{font:inherit}button{cursor:pointer}.app-shell{background:radial-gradient(circle at 70% 0%,#b9f35d1a,transparent 24rem),var(--bg);min-height:100vh}.topbar{border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);z-index:20;background:#ffffffe6;justify-content:space-between;align-items:center;height:72px;padding:0 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