:root{--color-bg:#FFFFFF;--color-bg-subtle:#F7F9FC;--color-bg-muted:#EEF2F8;--color-border:#DDE4EE;--color-border-strong:#B8C4D6;--color-ink:#0B1F3A;--color-ink-muted:#4A5A75;--color-ink-subtle:#7A8AA3;--color-primary:#0F3D6E;--color-primary-hover:#0A2C52;--color-accent:#2563EB;--color-accent-hover:#1D4FD1;--color-accent-soft:#DBEAFE;--color-warning:#B45309;--color-warning-bg:rgba(180, 83, 9, 0.06);--color-danger:#991B1B;--color-danger-bg:rgba(153, 27, 27, 0.06);--color-success:#166534;--color-success-bg:rgba(22, 101, 52, 0.06);--color-info:#0F3D6E;--color-info-bg:rgba(15, 61, 110, 0.06);--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:20px;--space-6:24px;--space-8:32px;--space-10:40px;--space-12:48px;--space-16:64px;--space-20:80px;--space-24:96px;--radius-sm:2px;--radius-md:6px;--shadow-sm:0 1px 3px rgba(11, 31, 58, 0.06),0 1px 2px rgba(11, 31, 58, 0.04);--width-article:720px;--width-tools:1200px;--width-wide:1440px;--font-serif:'Source Serif 4','Georgia',serif;--font-sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--font-mono:'JetBrains Mono','Fira Code','Consolas',monospace;--transition-fast:150ms ease;--transition-normal:250ms ease}