:root {
  /* Colors - Primary */
  --color-primary: #0D5E6B;
  --color-primary-dark: #0A4A54;
  --color-primary-light: #E8F4F5;

  /* Colors - Accent */
  --color-accent: #E8822A;
  --color-accent-dark: #D4731F;

  /* Colors - Green/Eco */
  --color-green: #27AE60;
  --color-green-dark: #1E8449;

  /* Colors - Neutral */
  --color-white: #FFFFFF;
  --color-neutral-100: #F5F7FA;
  --color-neutral-200: #E1E5EA;
  --color-neutral-300: #C8D0D8;
  --color-neutral-400: #8899A8;
  --color-neutral-500: #4A5568;
  --color-neutral-600: #2D3436;

  /* Colors - Semantic */
  --color-success: #27AE60;
  --color-error: #E74C3C;
  --color-warning: #F39C12;

  /* Typography */
  --font-heading: 'Noto Sans SC', -apple-system, 'Microsoft YaHei', sans-serif;
  --font-body: -apple-system, 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;

  /* 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: 1.75rem;
  --text-4xl: 2rem;
  --text-5xl: 2.5rem;
  --text-6xl: 3rem;
  --text-7xl: 3.5rem;
  --text-8xl: 4rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Breakpoints */
  --bp-sm: 480px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.6s ease;

  /* Container */
  --container-max: 1200px;
  --container-padding: 20px;
}