:root{--brand:#0878ff;--brand2:#00a9ff;--ink:#17213b;--muted:#75809a;--line:#e6eaf2;--paper:#fff;--bg:#f5f7fb;--green:#16a36a;--amber:#f09b25;--red:#dc5151;--violet:#7867ee;--shadow:0 12px 36px rgba(38,63,110,.08)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"Microsoft YaHei",system-ui,sans-serif;font-size:14px}.app-shell{display:grid;grid-template-columns:232px 1fr;min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;background:#fff;border-right:1px solid var(--line);padding:28px 18px 22px;display:flex;flex-direction:column;z-index:5}.brand{padding:0 9px 29px;border-bottom:1px solid var(--line)}.brand img{width:174px;height:auto;display:block}.brand>span{display:block;margin:5px 3px 0;color:#8b95aa;font-size:11px;letter-spacing:.26em}.sidebar 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