:root {
  --font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  --fs-base: 16px;
  --fs-h1: 2rem;
  --fs-h2: 1.5rem;
  --color-primary: #FF6B6B;
  --color-accent: #FFD93D;
  --color-bg: #FFFAF5;
  --color-bg-card: #FFFFFF;
  --color-text: #2D3436;
  --color-text-secondary: #636E72;
  --color-border: #FFE0E0;
  --theme-shadow: 0 4px 24px rgba(255,107,107,0.12);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --contact-footer-h: 72px;
}

[data-theme="warm"] { --color-primary: #FF6B6B; --color-accent: #FFD93D; --color-bg: #FFFAF5; --color-border: #FFE0E0; }
[data-theme="elegant"] { --color-primary: #8B7355; --color-accent: #C9A96E; --color-bg: #FDFBF7; --color-border: #E8DED0; }
[data-theme="fresh"] { --color-primary: #5B8C5A; --color-accent: #F4A460; --color-bg: #FAFCF8; --color-border: #D4E8D4; }
[data-theme="business"] { --color-primary: #2C3E50; --color-accent: #3498DB; --color-bg: #FFFFFF; --color-border: #ECF0F1; }
[data-theme="party"] {
  --color-primary: #6C63FF; --color-accent: #FF6B9D; --color-bg: #1A1A2E;
  --color-bg-card: #252540; --color-text: #F8F8FF; --color-text-secondary: #A0A0C0; --color-border: rgba(255,255,255,0.12);
}
[data-theme="chinese"] { --color-primary: #D4380D; --color-accent: #FFD666; --color-bg: #FFFBE6; --color-border: #FFE7BA; }

[data-font="large"] { --fs-base: 20px; }
[data-font="xlarge"] { --fs-base: 24px; }