:root {
  /* Brand Colors */
  --color-navy:        #1A2B5E;
  --color-navy-dark:   #111D42;
  --color-navy-light:  #2A3F80;
  --color-gold:        #C9A000;
  --color-gold-light:  #E4BC2A;
  --color-gold-pale:   #F5E8A0;

  /* UI Colors */
  --color-bg:          #F5F7FA;
  --color-bg-dark:     #E8ECF2;
  --color-text:        #1A1A2E;
  --color-text-muted:  #5A6072;
  --color-white:       #FFFFFF;
  --color-border:      #D1D9E6;

  /* Typography */
  --font-serif-zh:     'Noto Serif SC', 'Noto Serif', serif;
  --font-serif-en:     'Playfair Display', 'Georgia', serif;
  --font-body:         'Inter', 'PingFang SC', 'Helvetica Neue', 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:   1.875rem;
  --text-4xl:   2.25rem;
  --text-5xl:   3rem;
  --text-6xl:   3.75rem;

  /* 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;

  /* Border Radius */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  20px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.12), 0 2px 6px rgba(0,0,0,0.08);
  --shadow-lg:  0 10px 30px rgba(0,0,0,0.15), 0 4px 12px rgba(0,0,0,0.1);
  --shadow-xl:  0 20px 50px rgba(0,0,0,0.18), 0 8px 20px rgba(0,0,0,0.12);

  /* Transitions */
  --transition-fast:   0.15s ease;
  --transition-base:   0.25s ease;
  --transition-slow:   0.4s ease;

  /* Layout */
  --nav-height:    72px;
  --max-width:     1280px;
  --section-py:    var(--space-20);
}