/* ============================================================
   主题 6 - 国际银 (极简银灰, 上海/广东/山东)
   ============================================================ */
body.theme-6 {
  color: #0f172a;
  background: #f8fafc;
  --t-primary: #1e293b;
  --t-primary-deep: #0f172a;
  --t-primary-light: #475569;
  --t-accent: #64748b;
  --t-accent-light: #94a3b8;
  --t-accent-dark: #475569;
  --t-border: #e2e8f0;
  --t-text: #0f172a;
  --t-text-mid: #475569;
  --t-text-light: #64748b;
  --t-bg-alt: #f1f5f9;
  --t-bg: #f8fafc;
  --t-card: #ffffff;
}

body.theme-6 h1, body.theme-6 h2, body.theme-6 h3, body.theme-6 h4, body.theme-6 h5, body.theme-6 h6 {
  color: var(--t-primary);
  font-family: 'Noto Serif SC', 'Source Han Serif SC', serif;
  font-weight: 700;
}
body.theme-6 .hero { background: var(--t-primary-deep); color: #fff; }
body.theme-6 .hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(135deg, #1e293b 0%, #475569 50%, #1e293b 100%);
}
body.theme-6 .hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
body.theme-6 .hero h1 { color: #fff; }
body.theme-6 .hero h1 .accent { color: var(--t-accent-light); }
body.theme-6 .hero-desc { color: rgba(255,255,255,0.82); }
body.theme-6 .hero-badge { border: 1px solid var(--t-accent); color: var(--t-accent-light); background: rgba(100, 116, 139, 0.1); }
body.theme-6 .hero-badge .dot { background: var(--t-accent); }
body.theme-6 .hero-stat-num { color: var(--t-accent-light); font-family: 'Noto Serif SC', serif; }
body.theme-6 .hero-stat-label { color: rgba(255,255,255,0.7); }
body.theme-6 .hero-stats { border-top: 1px solid rgba(148, 163, 184, 0.2); }
body.theme-6 .hero-scroll { color: var(--t-accent-light); }
body.theme-6 .hero-scroll .arrow { background: linear-gradient(to bottom, var(--t-accent-light), transparent); }
body.theme-6 .section-alt { background: var(--t-bg-alt); }
body.theme-6 .section-eyebrow { color: var(--t-accent-dark); }
body.theme-6 .section-eyebrow::before { background: var(--t-accent); }
body.theme-6 .section-desc { color: var(--t-text-mid); }
body.theme-6 .service-card { background: var(--t-card); border: 1px solid var(--t-border); }
body.theme-6 .service-card::before { background: var(--t-primary); }
body.theme-6 .service-card:hover { border-color: var(--t-accent); box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12); }
body.theme-6 .service-icon { background: var(--t-primary); color: var(--t-accent-light); }
body.theme-6 .service-link { color: var(--t-accent-dark); }
body.theme-6 .case-item { background: var(--t-card); box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06); }
body.theme-6 .case-item:hover { box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12); }
body.theme-6 .case-tag { background: var(--t-primary); color: #fff; }
body.theme-6 .case-info { border-top: 3px solid var(--t-accent); background: var(--t-card); }
body.theme-6 .case-info p { color: var(--t-text-mid); }
body.theme-6 .region-feature { background: var(--t-card); border-left: 4px solid var(--t-primary); }
body.theme-6 .region-feature h3 { color: var(--t-primary); }
body.theme-6 .region-feature p { color: var(--t-text-mid); }
body.theme-6 .region-feature-list li { color: var(--t-text-mid); }
body.theme-6 .region-feature-list li::before { color: var(--t-accent-dark); }
body.theme-6 .process-num { background: var(--t-primary); color: #fff; }
body.theme-6 .process-step p { color: var(--t-text-mid); }
body.theme-6 .application-card { background: var(--t-card); border: 1px solid var(--t-border); }
body.theme-6 .application-card::before { background: linear-gradient(90deg, var(--t-primary) 0%, var(--t-accent) 100%); }
body.theme-6 .application-card:hover { border-color: var(--t-primary); box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12); }
body.theme-6 .application-card p { color: var(--t-text-mid); }
body.theme-6 .cert-wrapper { background: var(--t-card); box-shadow: 0 8px 32px rgba(15, 23, 42, 0.08); border: 1px solid var(--t-border); }
body.theme-6 .cert-image-wrap { background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%); }
body.theme-6 .cert-image-wrap::before, body.theme-6 .cert-image-wrap::after { border-color: var(--t-primary); }
body.theme-6 .cert-badge { background: var(--t-primary); color: #fff; }
body.theme-6 .cert-badge-title { color: var(--t-accent-light); }
body.theme-6 .cert-features li { color: var(--t-text-mid); border-color: var(--t-border); }
body.theme-6 .cert-features .check { background: var(--t-primary); color: #fff; }
body.theme-6 .contact-card { background: var(--t-card); border: 1px solid var(--t-border); }
body.theme-6 .contact-card:hover { border-color: var(--t-accent); box-shadow: 0 8px 24px rgba(15, 23, 42, 0.08); }
body.theme-6 .contact-card-label { color: var(--t-accent-dark); }
body.theme-6 .contact-card-value { color: var(--t-primary); }
body.theme-6 .contact-card-value a { color: var(--t-primary); }
body.theme-6 .contact-card-icon { color: var(--t-accent-dark); }
body.theme-6 .cta-banner { background: linear-gradient(135deg, var(--t-primary) 0%, var(--t-accent-dark) 100%); color: #fff; }
body.theme-6 .cta-banner h2 { color: #fff; }
body.theme-6 .cta-banner p { color: rgba(255,255,255,0.85); }
body.theme-6 .btn-primary { background: var(--t-primary); color: #fff; box-shadow: 0 8px 24px rgba(15, 23, 42, 0.2); }
body.theme-6 .btn-primary:hover { background: var(--t-accent-dark); }
body.theme-6 .btn-outline { color: #fff; border-color: rgba(255,255,255,0.4); }
body.theme-6 .btn-outline:hover { border-color: var(--t-accent-light); color: var(--t-accent-light); }
body.theme-6 .site-footer { background: var(--t-primary-deep); color: rgba(255,255,255,0.7); }
body.theme-6 .footer-col h4 { color: #fff; }
body.theme-6 .footer-col ul li a { color: rgba(255,255,255,0.6); }
body.theme-6 .footer-col ul li a:hover { color: var(--t-accent-light); }
body.theme-6 .footer-contact li { color: rgba(255,255,255,0.7); }
body.theme-6 .footer-bottom { color: rgba(255,255,255,0.5); }
body.theme-6 .footer-bottom a { color: rgba(255,255,255,0.7); }
body.theme-6 .footer-bottom a:hover { color: var(--t-accent-light); }
body.theme-6 .footer-tech { color: rgba(255,255,255,0.5); }
body.theme-6 .footer-tech a { color: var(--t-accent-light); }
body.theme-6 .footer-tech a:hover { color: #fff; }
body.theme-6 .footer-sitemap a { color: rgba(255,255,255,0.7); }
body.theme-6 .footer-sitemap a:hover { color: var(--t-accent-light); }
body.theme-6 .footer-cities-title { color: var(--t-accent-light); }
body.theme-6 .footer-cities-list a { color: rgba(255,255,255,0.6); }
body.theme-6 .footer-cities-list a:hover { color: var(--t-accent-light); background: rgba(100, 116, 139, 0.1); }