:root{--page:#f2f4f5;--panel:#fff;--line:#d8dfe2;--ink:#182229;--muted:#68757d;--nav:#17242a;--nav2:#23434b;--teal:#087d68;--blue:#2674a6;--red:#ba3c35;--amber:#9b6700;--soft:#f7f9fa}*{box-sizing:border-box}html{background:var(--page)}body{margin:0;color:var(--ink);background:var(--page);font:14px/1.5 "Microsoft YaHei","PingFang SC",Arial,sans-serif;letter-spacing:0}button,select,textarea{font:inherit}.shell{min-height:100vh;display:grid;grid-template-columns:224px minmax(0,1fr)}.sidebar{position:sticky;top:0;height:100vh;padding:18px 12px;color:#d8e2e6;background:var(--nav);display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:10px;padding:3px 9px 18px;border-bottom:1px solid #34434a}.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:#e6f3f0;color:#0a6d5c;font-size:18px;font-weight:800;border-radius:6px}.brand strong,.brand span{display:block}.brand strong{color:#fff;font-size:17px}.brand 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