/* ============================================================
   主题 0 - 工业蓝 (经典工程风格 + 数据网格背景)
   ============================================================ */
body.theme-0 {
  color: #1a202c;
  background: #f8f9fa;
  --t-primary: #0a2540;
  --t-primary-deep: #061a2e;
  --t-primary-light: #1e3a5f;
  --t-accent: #c9885a;
  --t-accent-light: #d9a574;
  --t-accent-dark: #a86b3f;
  --t-border: #e2e8f0;
  --t-text: #1a202c;
  --t-text-mid: #4a5568;
  --t-text-light: #718096;
  --t-bg-alt: #f1f3f5;
  --t-grid-color: rgba(201, 136, 90, 0.06);
}

body.theme-0 h1, body.theme-0 h2, body.theme-0 h3, body.theme-0 h4, body.theme-0 h5, body.theme-0 h6 {
  color: var(--t-primary);
  font-family: 'Noto Serif SC', 'Source Han Serif SC', serif;
}

body.theme-0 .hero {
  background: var(--t-primary-deep);
  color: #fff;
}
body.theme-0 .hero::before {
  content: '';
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(201, 136, 90, 0.18) 0%, transparent 50%),
    linear-gradient(135deg, #0a2540 0%, #1e3a5f 50%, #0a2540 100%);
}
body.theme-0 .hero::after {
  content: '';
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--t-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--t-grid-color) 1px, transparent 1px);
  background-size: 50px 50px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}
body.theme-0 .hero h1 { color: #fff; }
body.theme-0 .hero h1 .accent { color: var(--t-accent); }
body.theme-0 .hero-desc { color: rgba(255,255,255,0.8); }
body.theme-0 .hero-badge { border: 1px solid rgba(201, 136, 90, 0.5); color: var(--t-accent-light); background: rgba(201, 136, 90, 0.08); }
body.theme-0 .hero-badge .dot { background: var(--t-accent); }
body.theme-0 .hero-stat-num { color: var(--t-accent); font-family: 'Noto Serif SC', serif; }
body.theme-0 .hero-stat-label { color: rgba(255,255,255,0.7); }
body.theme-0 .hero-stats { border-top: 1px solid rgba(255,255,255,0.15); }
body.theme-0 .hero-scroll { color: rgba(255,255,255,0.6); }
body.theme-0 .hero-scroll .arrow { background: linear-gradient(to bottom, var(--t-accent), transparent); }

body.theme-0 .section-alt { background: var(--t-bg-alt); }
body.theme-0 .section-eyebrow { color: var(--t-accent); }
body.theme-0 .section-eyebrow::before { background: var(--t-accent); }
body.theme-0 .section-desc { color: var(--t-text-mid); }

body.theme-0 .service-card { background: #fff; border: 1px solid var(--t-border); }
body.theme-0 .service-card::before { background: var(--t-accent); }
body.theme-0 .service-card:hover { border-color: var(--t-accent); box-shadow: 0 12px 40px rgba(10,37,64,0.18); }
body.theme-0 .service-icon { background: linear-gradient(135deg, var(--t-primary) 0%, var(--t-primary-light) 100%); color: var(--t-accent); }
body.theme-0 .service-link { color: var(--t-accent-dark); }

body.theme-0 .case-item { background: #fff; box-shadow: 0 1px 3px rgba(10,37,64,0.08); }
body.theme-0 .case-item:hover { box-shadow: 0 12px 40px rgba(10,37,64,0.18); }
body.theme-0 .case-tag { background: rgba(201, 136, 90, 0.95); color: #fff; }
body.theme-0 .case-info { border-top: 3px solid var(--t-accent); background: #fff; }
body.theme-0 .case-info p { color: var(--t-text-mid); }

body.theme-0 .region-feature {
  background: linear-gradient(135deg, rgba(10, 37, 64, 0.04) 0%, rgba(201, 136, 90, 0.04) 100%);
  border-left: 4px solid var(--t-accent);
}
body.theme-0 .region-feature h3 { color: var(--t-primary); }
body.theme-0 .region-feature p { color: var(--t-text-mid); }
body.theme-0 .region-feature-list li { color: var(--t-text-mid); }
body.theme-0 .region-feature-list li::before { color: var(--t-accent); }

body.theme-0 .process-num { background: var(--t-primary); color: var(--t-accent); }
body.theme-0 .process-step p { color: var(--t-text-mid); }

body.theme-0 .application-card { background: #fff; border: 1px solid var(--t-border); }
body.theme-0 .application-card::before { background: linear-gradient(90deg, var(--t-accent) 0%, var(--t-primary-light) 100%); }
body.theme-0 .application-card:hover { border-color: var(--t-accent); box-shadow: 0 12px 40px rgba(10,37,64,0.18); }
body.theme-0 .application-card p { color: var(--t-text-mid); }

body.theme-0 .cert-wrapper { background: #fff; box-shadow: 0 8px 32px rgba(10,37,64,0.08); border: 1px solid var(--t-border); }
body.theme-0 .cert-image-wrap { background: linear-gradient(135deg, #fff5e8 0%, #ffe9d2 100%); }
body.theme-0 .cert-image-wrap::before, body.theme-0 .cert-image-wrap::after { border-color: var(--t-accent); }
body.theme-0 .cert-image-wrap img { box-shadow: 0 8px 24px rgba(10,37,64,0.12); }
body.theme-0 .cert-badge { background: linear-gradient(135deg, var(--t-primary) 0%, var(--t-primary-light) 100%); color: #fff; }
body.theme-0 .cert-badge-title { color: var(--t-accent-light); }
body.theme-0 .cert-features li { color: var(--t-text-mid); border-color: var(--t-border); }
body.theme-0 .cert-features .check { background: var(--t-accent); color: #fff; }

body.theme-0 .contact-card { background: #fff; border: 1px solid var(--t-border); }
body.theme-0 .contact-card:hover { border-color: var(--t-accent); box-shadow: 0 8px 24px rgba(10,37,64,0.12); }
body.theme-0 .contact-card-label { color: var(--t-accent); }
body.theme-0 .contact-card-value { color: var(--t-primary); }
body.theme-0 .contact-card-value a { color: var(--t-primary); }
body.theme-0 .contact-card-icon { color: var(--t-accent); }

body.theme-0 .cta-banner { background: linear-gradient(135deg, var(--t-primary) 0%, var(--t-primary-light) 100%); color: #fff; }
body.theme-0 .cta-banner h2 { color: #fff; }
body.theme-0 .cta-banner p { color: rgba(255,255,255,0.85); }

body.theme-0 .btn-primary { background: var(--t-accent); color: #fff; box-shadow: 0 8px 24px rgba(201, 136, 90, 0.25); }
body.theme-0 .btn-primary:hover { background: var(--t-accent-light); }
body.theme-0 .btn-outline { color: #fff; border-color: rgba(255,255,255,0.4); }
body.theme-0 .btn-outline:hover { border-color: var(--t-accent); color: var(--t-accent-light); }

body.theme-0 .site-footer { background: var(--t-primary-deep); color: rgba(255,255,255,0.7); }
body.theme-0 .footer-col h4 { color: #fff; }
body.theme-0 .footer-col ul li a { color: rgba(255,255,255,0.6); }
body.theme-0 .footer-col ul li a:hover { color: var(--t-accent-light); }
body.theme-0 .footer-contact li { color: rgba(255,255,255,0.7); }
body.theme-0 .footer-bottom { color: rgba(255,255,255,0.5); }
body.theme-0 .footer-bottom a { color: rgba(255,255,255,0.7); }
body.theme-0 .footer-bottom a:hover { color: var(--t-accent-light); }
body.theme-0 .footer-tech { color: rgba(255,255,255,0.5); }
body.theme-0 .footer-tech a { color: var(--t-accent-light); }
body.theme-0 .footer-tech a:hover { color: #fff; }
body.theme-0 .footer-sitemap a { color: rgba(255,255,255,0.7); }
body.theme-0 .footer-sitemap a:hover { color: var(--t-accent-light); }
body.theme-0 .footer-cities-title { color: var(--t-accent-light); }
body.theme-0 .footer-cities-list a { color: rgba(255,255,255,0.6); }
body.theme-0 .footer-cities-list a:hover { color: var(--t-accent-light); background: rgba(201, 136, 90, 0.1); }