/* ============================================================
   东交智控 - Responsive
   ============================================================ */

/* === Large Desktop === */
@media (max-width: 1280px) {
  :root {
    --container-max: 1140px;
  }
  
  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* === Tablet === */
@media (max-width: 1024px) {
  :root {
    --fs-5xl: 2.5rem;
    --fs-6xl: 3rem;
    --space-4xl: 4rem;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .hero-content h1 {
    font-size: var(--fs-4xl);
  }

  .stat-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* === Mobile === */
@media (max-width: 768px) {
  :root {
    --fs-4xl: 1.75rem;
    --fs-5xl: 2rem;
    --fs-6xl: 2.5rem;
    --space-4xl: 3rem;
    --space-3xl: 2.5rem;
    --space-xl: 1rem;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .section {
    padding: var(--space-3xl) 0;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero-content h1 {
    font-size: var(--fs-4xl);
  }

  .hero-content p {
    font-size: var(--fs-base);
  }

  .stat-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }

  .stat-number {
    font-size: var(--fs-4xl);
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }

  .cta-buttons .btn {
    width: 100%;
  }

  .page-hero h1 {
    font-size: var(--fs-4xl);
  }

  .page-hero p {
    font-size: var(--fs-base);
  }

  .gallery {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: var(--fs-3xl);
  }

  .card {
    padding: var(--space-lg);
  }

  .tabs {
    gap: 0;
  }

  .tab-btn {
    padding: 10px 14px;
    font-size: var(--fs-sm);
  }

  .float-contact {
    right: 16px;
    bottom: 16px;
  }

  .back-to-top {
    right: 16px;
    bottom: 72px;
  }

  .breadcrumb {
    flex-wrap: wrap;
  }

  .logo-text {
    font-size: var(--fs-base);
  }

  .logo-text small {
    font-size: 10px;
  }
}

/* === Small Mobile === */
@media (max-width: 480px) {
  :root {
    --fs-4xl: 1.5rem;
    --fs-3xl: 1.25rem;
  }

  .container {
    padding: 0 12px;
  }

  .logo-text {
    display: none;
  }

  .header-cta .btn {
    padding: 8px 16px;
    font-size: var(--fs-sm);
  }

  .section-eyebrow {
    font-size: var(--fs-xs);
  }

  .feature-item {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .feature-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
}

/* === Print === */
@media print {
  .site-header,
  .site-footer,
  .float-contact,
  .back-to-top,
  .scroll-progress,
  .search-overlay,
  .mobile-nav,
  .menu-toggle {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }
}