:root {
  --font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  --fs-base: 16px;
  --fs-h1: 2rem;
  --fs-h2: 1.5rem;
  --color-primary: #1E3A5F;
  --color-accent: #3B82F6;
  --color-bg: #F1F5F9;
  --color-bg-card: #FFFFFF;
  --color-text: #0F172A;
  --color-text-secondary: #64748B;
  --color-border: #E2E8F0;
  --theme-shadow: 0 4px 20px rgba(15,23,42,0.08);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
  --contact-footer-h: 72px;
  --bottom-nav-h: 48px;
  --compare-bar-h: 52px;
}

[data-theme="industrial"] {
  --color-primary: #1E3A5F;
  --color-accent: #3B82F6;
  --color-bg: #F1F5F9;
}
[data-theme="tech"] {
  --color-primary: #0F172A;
  --color-accent: #22D3EE;
  --color-bg: #0F172A;
  --color-bg-card: #1E293B;
  --color-text: #F8FAFC;
  --color-text-secondary: #94A3B8;
  --color-border: rgba(148,163,184,0.2);
}
[data-theme="fashion"] {
  --color-primary: #111827;
  --color-accent: #EC4899;
  --color-bg: #FAFAFA;
}
[data-theme="home"] {
  --color-primary: #92400E;
  --color-accent: #D97706;
  --color-bg: #FFFBEB;
}
[data-theme="medical"] {
  --color-primary: #0369A1;
  --color-accent: #38BDF8;
  --color-bg: #F0F9FF;
}
[data-theme="food"] {
  --color-primary: #C2410C;
  --color-accent: #FB923C;
  --color-bg: #FFF7ED;
}
[data-theme="education"] {
  --color-primary: #1D4ED8;
  --color-accent: #FACC15;
  --color-bg: #EFF6FF;
}
[data-theme="green"] {
  --color-primary: #047857;
  --color-accent: #34D399;
  --color-bg: #ECFDF5;
}

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