:root {
  /* Brand colors */
  --blue: #2867b2;
  --blue-light: #3a7bc8;
  --blue-dark: #1d4f8a;
  --gold: #c8943e;
  --gold-light: #d4a85c;
  --ink: #24384d;
  --muted: #61748a;
  --paper: #f8fbfd;
  --deep: #0a1628;
  --deep-mid: #132a4a;
  --white-soft: rgba(255, 255, 255, .86);
  --white-dim: rgba(255, 255, 255, .55);
  --border-light: rgba(40, 103, 178, .08);
  --border-medium: rgba(40, 103, 178, .16);
  --shadow-soft: 0 8px 32px rgba(20, 40, 70, .08);
  --shadow-card: 0 2px 12px rgba(20, 40, 70, .06);

  /* Typography */
  --font-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-en: "Poppins", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
  --space-3xl: 96px;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;
  --section-padding: clamp(48px, 8vw, 96px) clamp(20px, 5vw, 40px);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;

  /* Border radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}