:root{--bg:#f5f6f8;--ink:#222b3b;--muted:#8590a2;--line:#e7eaf0;--green:#26a881;--purple:#7864e8;--red:#d36568}*{box-sizing:border-box}body{margin:0;background:var(--bg);font:14px -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink)}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}.shell{display:flex;min-height:100vh}aside{position:fixed;inset:0 auto 0 0;width:224px;background:#fff;border-right:1px solid var(--line);padding:36px 21px;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;color:var(--purple);font-size:32px;margin:0 9px 48px}.brand span{font-size:21px;font-weight:800;letter-spacing:3px;color:var(--ink)}.brand small{display:block;font-size:8px;letter-spacing:1.7px;color:var(--muted);margin-top:7px}.nav-caption{font-size:11px;color:var(--muted);margin:0 15px 14px}.nav{border:0;background:none;padding:14px 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