:root{--blue:#0078d4;--blue-dark:#0067b8;--blue-soft:#eaf4fd;--canvas:#f4f7fb;--line:#dfe7ef;--line-light:#eaf0f6;--line-strong:#cbd8e5;--ink:#253446;--ink-strong:#182a3c;--text-subtle:#536579;--muted:#728399;--green:#15803d;--red:#c7444f;--paper:#fff;--font-small:11px;--radius-control:7px;--radius-card:9px;--space-2:8px}:root{font-family:Inter,Segoe UI,Microsoft YaHei UI,PingFang SC,sans-serif;color:var(--ink);background:var(--canvas);font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}button:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--blue);outline-offset:2px}svg{flex:none}#app{min-height:100vh}.app-layout{display:flex;min-height:100vh}.sidebar{position:sticky;top:0;z-index:20;display:flex;flex:none;flex-direction:column;width:236px;height:100vh;border-right:1px solid var(--line);background:var(--paper);transition:width .2s ease}.sidebar.collapsed{width:72px}.brand-block{display:flex;align-items:center;gap:10px;height:72px;padding:0 18px;border-bottom:1px solid var(--line-light)}.brand-mark{display:grid;flex:none;place-items:center;width:35px;height:35px;border-radius:9px;color:#fff;background:var(--blue);font-size:16px;font-weight:800;letter-spacing:-.08em}.brand-mark span{font-size:11px;align-self:center}.brand-copy{display:flex;min-width:0;flex-direction:column;gap:1px;white-space:nowrap}.brand-copy strong{color:var(--ink-strong);font-size:17px;line-height:1.1;letter-spacing:-.04em}.brand-copy span{color:var(--muted);font-size:10px}.sidebar-toggle-row{display:grid;place-items:center;height:48px;border-bottom:1px solid var(--line-light)}.sidebar-toggle{border-color:transparent}.sidebar nav{flex:1;overflow-y:auto;padding:16px 10px}.nav-group+.nav-group{margin-top:20px}.nav-heading{height:27px;padding:4px 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