:root {
  /* === Colors === */
  --color-primary: #2563EB;
  --color-primary-light: #3B82F6;
  --color-primary-dark: #1D4ED8;
  --color-cyan: #06B6D4;
  --color-violet: #7C3AED;
  --color-emerald: #10B981;
  --color-warning: #F59E0B;

  /* Dark backgrounds */
  --color-dark-1: #0A0F1E;
  --color-dark-2: #0F172A;
  --color-dark-3: #1E293B;

  /* Light backgrounds */
  --color-light-1: #FFFFFF;
  --color-light-2: #F8FAFC;
  --color-light-3: #F1F5F9;
  --color-light-4: #E2E8F0;

  /* Text */
  --color-text-dark: #0F172A;
  --color-text-body: #334155;
  --color-text-muted: #64748B;
  --color-text-light: #F8FAFC;
  --color-text-light-muted: rgba(248,250,252,0.6);

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0A0F1E 0%, #0F172A 50%, #1a1145 100%);
  --gradient-primary: linear-gradient(135deg, #2563EB, #06B6D4);
  --gradient-cta: linear-gradient(135deg, #2563EB, #7C3AED);
  --gradient-text: linear-gradient(135deg, #3B82F6, #06B6D4);
  --gradient-card-dark: linear-gradient(135deg, rgba(37,99,235,0.08), rgba(6,182,212,0.08));

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
  --shadow-xl: 0 16px 48px rgba(0,0,0,0.16);
  --shadow-glow: 0 0 40px rgba(37,99,235,0.3);
  --shadow-glow-cyan: 0 0 40px rgba(6,182,212,0.2);

  /* Border */
  --border-light: 1px solid rgba(226,232,240,0.8);
  --border-dark: 1px solid rgba(255,255,255,0.08);
  --border-glass: 1px solid rgba(255,255,255,0.12);

  /* Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;

  /* Typography */
  --font-cn: "HarmonyOS Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Inter", sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", monospace;

  /* Font sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --text-7xl: 4.5rem;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Z-index */
  --z-nav: 1000;
  --z-modal: 2000;
  --z-tooltip: 3000;

  /* Container */
  --container-max: 1280px;
  --container-padding: 1.5rem;
}