:root{--color-white:#ffffff;--color-bg:#d1dcdc;--color-text:#000000;--color-accent:#0a84ff;--color-accent-dark:#0066d6;--color-accent-soft:rgba(10, 132, 255, 0.08);--color-accent-glow:rgba(10, 132, 255, 0.18);--color-text-secondary:#4d4d4d;--color-border:#b8c4c4;--color-surface-muted:#e8eded;--color-ink:#111111;--shadow-sm:0 1px 2px rgba(0, 0, 0, 0.05);--shadow-md:0 8px 30px rgba(0, 0, 0, 0.08);--shadow-lg:0 20px 50px rgba(0, 0, 0, 0.1);--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--shell-width:680px;color:var(--color-text);background:var(--color-bg);font-family:system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;-webkit-font-smoothing:antialiased}*,::after,::before{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(ellipse 80% 50% at 50% -10%,rgba(10,132,255,.12),transparent 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