:root{--bg:#f7f8fb;--surface:#ffffff;--surface-2:#f2f4f8;--border:#e4e7ee;--border-strong:#d3d8e2;--text:#131722;--text-muted:#5b6472;--text-faint:#8a93a3;--brand:#4338ca;--brand-strong:#3730a3;--brand-soft:#eef0fe;--signal:#0ea5a4;--ok:#16a34a;--ok-soft:#e7f6ec;--warn:#d97706;--warn-soft:#fdf1e0;--bad:#dc2626;--bad-soft:#fdeaea;--radius:12px;--radius-sm:8px;--shadow-sm:0 1px 2px rgba(19,23,34,0.06),0 1px 3px rgba(19,23,34,0.04);--shadow-md:0 4px 16px rgba(19,23,34,0.08);--shadow-lg:0 12px 40px rgba(19,23,34,0.12);--maxw:1140px;--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;--mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;line-height:1.5}a{color:inherit;text-decoration:none}h1,h2,h3,h4{margin:0;line-height:1.2;letter-spacing:-.02em}.container{max-width:var(--maxw);margin:0 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