/* ============================================================
   主题 3 - 京津冀蓝 (蓝红对撞,京津风格)
   ============================================================ */
body.theme-3 {
  color: #1e293b;
  background: #f1f5f9;
  --t-primary: #1e3a8a;
  --t-primary-deep: #0f1e4d;
  --t-primary-light: #3b82f6;
  --t-accent: #dc2626;
  --t-accent-light: #ef4444;
  --t-accent-dark: #991b1b;
  --t-border: #e2e8f0;
  --t-text: #1e293b;
  --t-text-mid: #475569;
  --t-text-light: #64748b;
  --t-bg-alt: #e2e8f0;
  --t-bg: #f1f5f9;
  --t-card: #ffffff;
}

body.theme-3 h1, body.theme-3 h2, body.theme-3 h3, body.theme-3 h4, body.theme-3 h5, body.theme-3 h6 {
  color: var(--t-primary);
  font-family: 'Noto Sans SC', 'PingFang SC', sans-serif;
  letter-spacing: 0;
}
body.theme-3 .hero { background: var(--t-primary-deep); color: #fff; }
body.theme-3 .hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 30% 20%, rgba(220, 38, 38, 0.18) 0%, transparent 50%),
    linear-gradient(135deg, #1e3a8a 0%, #3b82f6 50%, #1e3a8a 100%);
}
body.theme-3 .hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    repeating-linear-gradient(45deg, transparent 0, transparent 60px, rgba(255,255,255,0.03) 60px, rgba(255,255,255,0.03) 61px);
}
body.theme-3 .hero h1 { color: #fff; }
body.theme-3 .hero h1 .accent { color: var(--t-accent); }
body.theme-3 .hero-desc { color: rgba(255,255,255,0.88); }
body.theme-3 .hero-badge { border: 1px solid var(--t-accent); color: var(--t-accent-light); background: rgba(220, 38, 38, 0.1); }
body.theme-3 .hero-badge .dot { background: var(--t-accent); }
body.theme-3 .hero-stat-num { color: var(--t-accent); font-family: 'Noto Sans SC', sans-serif; font-weight: 900; }
body.theme-3 .hero-stat-label { color: rgba(255,255,255,0.75); }
body.theme-3 .hero-stats { border-top: 1px solid rgba(255,255,255,0.15); }
body.theme-3 .hero-scroll { color: rgba(255,255,255,0.6); }
body.theme-3 .hero-scroll .arrow { background: linear-gradient(to bottom, var(--t-accent), transparent); }

body.theme-3 .section-alt { background: var(--t-bg-alt); }
body.theme-3 .section-eyebrow { color: var(--t-accent); }
body.theme-3 .section-eyebrow::before { background: var(--t-accent); }
body.theme-3 .section-desc { color: var(--t-text-mid); }
body.theme-3 .service-card { background: var(--t-card); border: 1px solid var(--t-border); }
body.theme-3 .service-card::before { background: linear-gradient(90deg, var(--t-accent) 0%, var(--t-primary) 100%); }
body.theme-3 .service-card:hover { border-color: var(--t-primary); box-shadow: 0 12px 32px rgba(30, 58, 138, 0.18); }
body.theme-3 .service-icon { background: var(--t-primary); color: #fff; }
body.theme-3 .service-link { color: var(--t-accent); }
body.theme-3 .case-item { background: var(--t-card); box-shadow: 0 2px 8px rgba(30, 58, 138, 0.08); }
body.theme-3 .case-item:hover { box-shadow: 0 12px 32px rgba(30, 58, 138, 0.18); }
body.theme-3 .case-tag { background: var(--t-accent); color: #fff; }
body.theme-3 .case-info { border-top: 3px solid var(--t-primary); background: var(--t-card); }
body.theme-3 .case-info p { color: var(--t-text-mid); }
body.theme-3 .region-feature { background: var(--t-card); border-left: 4px solid var(--t-accent); }
body.theme-3 .region-feature h3 { color: var(--t-primary); }
body.theme-3 .region-feature p { color: var(--t-text-mid); }
body.theme-3 .region-feature-list li { color: var(--t-text-mid); }
body.theme-3 .region-feature-list li::before { color: var(--t-accent); }
body.theme-3 .process-num { background: var(--t-primary); color: #fff; }
body.theme-3 .process-step p { color: var(--t-text-mid); }
body.theme-3 .application-card { background: var(--t-card); border: 1px solid var(--t-border); }
body.theme-3 .application-card::before { background: linear-gradient(90deg, var(--t-primary) 0%, var(--t-accent) 100%); }
body.theme-3 .application-card:hover { border-color: var(--t-accent); box-shadow: 0 12px 32px rgba(30, 58, 138, 0.18); }
body.theme-3 .application-card p { color: var(--t-text-mid); }
body.theme-3 .cert-wrapper { background: var(--t-card); box-shadow: 0 8px 32px rgba(30, 58, 138, 0.1); border: 1px solid var(--t-border); }
body.theme-3 .cert-image-wrap { background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%); }
body.theme-3 .cert-image-wrap::before, body.theme-3 .cert-image-wrap::after { border-color: var(--t-accent); }
body.theme-3 .cert-badge { background: var(--t-primary); color: #fff; }
body.theme-3 .cert-badge-title { color: var(--t-accent-light); }
body.theme-3 .cert-features li { color: var(--t-text-mid); border-color: var(--t-border); }
body.theme-3 .cert-features .check { background: var(--t-accent); color: #fff; }
body.theme-3 .contact-card { background: var(--t-card); border: 1px solid var(--t-border); }
body.theme-3 .contact-card:hover { border-color: var(--t-primary); box-shadow: 0 8px 24px rgba(30, 58, 138, 0.12); }
body.theme-3 .contact-card-label { color: var(--t-accent); }
body.theme-3 .contact-card-value { color: var(--t-primary); }
body.theme-3 .contact-card-value a { color: var(--t-primary); }
body.theme-3 .contact-card-icon { color: var(--t-accent); }
body.theme-3 .cta-banner { background: linear-gradient(135deg, var(--t-primary) 0%, var(--t-primary-light) 100%); color: #fff; }
body.theme-3 .cta-banner h2 { color: #fff; }
body.theme-3 .cta-banner p { color: rgba(255,255,255,0.88); }
body.theme-3 .btn-primary { background: var(--t-accent); color: #fff; box-shadow: 0 8px 24px rgba(220, 38, 38, 0.25); }
body.theme-3 .btn-primary:hover { background: var(--t-accent-light); }
body.theme-3 .btn-outline { color: #fff; border-color: rgba(255,255,255,0.5); }
body.theme-3 .btn-outline:hover { border-color: var(--t-accent); color: var(--t-accent-light); }
body.theme-3 .site-footer { background: var(--t-primary-deep); color: rgba(255,255,255,0.75); }
body.theme-3 .footer-col h4 { color: #fff; }
body.theme-3 .footer-col ul li a { color: rgba(255,255,255,0.65); }
body.theme-3 .footer-col ul li a:hover { color: var(--t-accent-light); }
body.theme-3 .footer-contact li { color: rgba(255,255,255,0.7); }
body.theme-3 .footer-bottom { color: rgba(255,255,255,0.5); }
body.theme-3 .footer-bottom a { color: rgba(255,255,255,0.7); }
body.theme-3 .footer-bottom a:hover { color: var(--t-accent-light); }
body.theme-3 .footer-tech { color: rgba(255,255,255,0.5); }
body.theme-3 .footer-tech a { color: var(--t-accent-light); }
body.theme-3 .footer-tech a:hover { color: #fff; }
body.theme-3 .footer-sitemap a { color: rgba(255,255,255,0.7); }
body.theme-3 .footer-sitemap a:hover { color: var(--t-accent-light); }
body.theme-3 .footer-cities-title { color: var(--t-accent-light); }
body.theme-3 .footer-cities-list a { color: rgba(255,255,255,0.6); }
body.theme-3 .footer-cities-list a:hover { color: var(--t-accent-light); background: rgba(220, 38, 38, 0.1); }