:root{--bg:#f4f7fb;--surface:#ffffff;--ink:#14202e;--ink-soft:#516375;--muted:#8aa0b0;--line:#e4ebf2;--line-strong:#cfdae4;--accent:#128a9c;--accent-strong:#0d6f7e;--accent-soft:#e6f4f6;--good:#1c7a4a;--good-soft:#e7f7ee;--danger:#b00020;--danger-soft:#fde7ea;--radius:16px;--radius-sm:11px;--shadow:0 1px 2px rgba(16,40,60,0.05),0 8px 24px rgba(16,40,60,0.06);--shadow-lg:0 10px 30px rgba(16,40,60,0.13)}*{box-sizing:border-box}body,html{margin:0}body{font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:radial-gradient(1100px 560px at 82% -8%,#dcf0f3 0,rgba(220,240,243,0) 55%),radial-gradient(820px 480px at -5% 2%,#eceefb 0,rgba(236,238,251,0) 52%),var(--bg);min-height:100vh;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.shell{max-width:880px;margin:0 auto;padding:0 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