:root{--canvas:#f5f7fb;--sidebar:#f9fbff;--surface:#fff;--surface-blue:#f3f7ff;--ink:#202a38;--muted:#6b7584;--line:#e3e8f0;--blue:#2767e8;--blue-deep:#154fc3;--blue-soft:#eaf1ff;--green:#17895f;--green-soft:#e9f8f1;--orange:#bb5a15;--orange-soft:#fff1e8;--red:#ba445b;--red-soft:#fff0f3;--radius:16px;--shadow:0 2px 8px rgba(25,46,83,.045),0 12px 28px rgba(25,46,83,.045)}*{box-sizing:border-box}html{background:var(--canvas)}body{height:100vh;margin:0;overflow:hidden;background:var(--canvas);color:var(--ink);font:14px/1.5 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}.shell{display:flex;height:100vh;overflow:hidden}.side{width:220px;height:100vh;flex:0 0 220px;overflow-y:auto;border-right:1px solid var(--line);background:var(--sidebar);padding:25px 12px 16px}.brand{display:flex;align-items:center;min-height:40px;padding:0 14px 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