:root {
  --color-bg: #f4f6fb;
  --color-surface: #ffffff;
  --color-ink: #151c2c;
  --color-body: #4a5568;
  --color-muted: #7a8496;
  --color-navy: #0c1424;
  --color-navy-deep: #070b14;
  --color-navy-mid: #162033;
  --color-accent: #2f6bff;
  --color-accent-deep: #1e54e8;
  --color-accent-soft: #e8efff;
  --color-gold: #c4a265;
  --color-gold-bright: #d8bc86;
  --color-gold-soft: #efe0c6;
  --color-cream: #f7f4ee;
  --color-paper: #f4f6fb;
  --color-white: #ffffff;
  --color-danger: #c24141;
  --color-overlay: rgba(12, 20, 36, 0.55);
  --color-line: rgba(21, 28, 44, 0.08);
  --color-line-strong: rgba(47, 107, 255, 0.22);

  --font-display: "Outfit", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-serif: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2.25rem;
  --fs-3xl: clamp(1.8rem, 3vw, 2.6rem);
  --fs-4xl: clamp(2.4rem, 5vw, 4.25rem);
  --fs-hero: clamp(2.4rem, 6.8vw, 5.4rem);
  --fs-display: clamp(3.4rem, 11vw, 8.2rem);

  --lh-tight: 1.12;
  --lh-snug: 1.35;
  --lh-body: 1.85;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;
  --space-9: 7.5rem;

  --container: 1180px;
  --container-wide: 1320px;
  --header-h: 80px;
  --radius-sm: 14px;
  --radius-md: 24px;
  --radius-lg: 40px;
  --radius-xl: 56px;
  --radius-pill: 999px;
  --shadow-header: 0 12px 40px rgba(21, 28, 44, 0.08);
  --shadow-card: 0 18px 50px rgba(21, 28, 44, 0.07);
  --shadow-soft: 0 10px 30px rgba(47, 107, 255, 0.12);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);

  --z-header: 2100;
  --z-overlay: 2000;
  --z-backtop: 1500;

  --grad-hero:
    radial-gradient(ellipse 70% 80% at 78% 18%, rgba(167, 139, 250, 0.42), transparent 58%),
    radial-gradient(ellipse 55% 70% at 18% 72%, rgba(47, 107, 255, 0.28), transparent 60%),
    radial-gradient(ellipse 40% 50% at 62% 78%, rgba(196, 162, 101, 0.22), transparent 55%),
    linear-gradient(180deg, #eef2ff 0%, #f7f8fc 48%, #f4f6fb 100%);
  --grad-shell: linear-gradient(135deg, rgba(232, 239, 255, 0.95) 0%, rgba(243, 232, 255, 0.72) 48%, rgba(232, 244, 255, 0.9) 100%);
}

@media (max-width: 900px) {
  :root {
    --header-h: 68px;
    --space-8: 3.25rem;
    --space-9: 4.75rem;
  }
}