:root {
  --font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  --fs-base: 16px;
  --fs-h1: 2rem;
  --fs-h2: 1.5rem;
  --fs-stat: 2.25rem;
  --color-primary: #C41E2A;
  --color-accent: #DAA520;
  --color-bg: #FAFAFA;
  --color-bg-card: #FFFFFF;
  --color-text: #1A1A2E;
  --color-text-secondary: #636E72;
  --color-border: #E8E8E8;
  --theme-shadow: 0 4px 20px rgba(0,0,0,0.08);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --contact-footer-h: 72px;
  --bottom-nav-h: 44px;
  --honor-gold: #FFD700;
  --honor-silver: #C0C0C0;
  --honor-bronze: #CD7F32;
}

[data-theme="chamber-red"] {
  --color-primary: #C41E2A;
  --color-accent: #DAA520;
  --color-bg: #FAFAFA;
}
[data-theme="gov-blue"] {
  --color-primary: #1565C0;
  --color-accent: #FFC107;
  --color-bg: #F0F4F8;
}
[data-theme="business-gold"] {
  --color-primary: #8B6914;
  --color-accent: #DAA520;
  --color-bg: #F5F0EB;
}
[data-theme="tech-cyan"] {
  --color-primary: #0891B2;
  --color-accent: #22D3EE;
  --color-bg: #0F172A;
  --color-bg-card: #1E293B;
  --color-text: #F1F5F9;
  --color-text-secondary: #94A3B8;
  --color-border: rgba(148,163,184,0.2);
}
[data-theme="eco-green"] {
  --color-primary: #059669;
  --color-accent: #F59E0B;
  --color-bg: #ECFDF5;
}
[data-theme="warm-orange"] {
  --color-primary: #EA580C;
  --color-accent: #FB923C;
  --color-bg: #FFF7ED;
}
[data-theme="elegant-purple"] {
  --color-primary: #7C3AED;
  --color-accent: #A78BFA;
  --color-bg: #F5F3FF;
}

[data-font="large"] { --fs-base: 20px; --fs-h1: 2.25rem; }
[data-font="xlarge"] { --fs-base: 24px; --fs-h1: 2.5rem; }