/* ============================================
   响应式：<768px 移动端 | 768-1199px 平板
   ============================================ */

@media (max-width: 1199px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .hero h1 { font-size: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 991px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 36px; }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .step-item:not(:last-child)::after { display: none; }
  .price-compare { grid-template-columns: 1fr; gap: 16px; max-width: 480px; }
  .price-vs { padding: 4px 0; }
}

@media (max-width: 767px) {
  body { font-size: 15px; }
  .container { padding: 0 18px; }

  .nav-menu { display: none; }
  .hamburger { display: flex; }
  .mobile-drawer { display: flex; }

  .hero { padding: 56px 0 48px; }
  .hero h1 { font-size: 28px; }
  .hero-sub { font-size: 15px; }
  .btn { padding: 12px 24px; font-size: 15px; }

  .section { padding: 52px 0; }
  .section-head { margin-bottom: 36px; }
  .section-head h2 { font-size: 24px; }
  .page-banner { padding: 44px 0 38px; }
  .page-banner h1 { font-size: 27px; }

  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 18px; }
  .steps { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .stat-row { grid-template-columns: repeat(3, 1fr); gap: 10px; }
  .stat-item b { font-size: 24px; }

  .cta-band { padding: 40px 24px; border-radius: 16px; }
  .cta-band h2 { font-size: 23px; }

  .biz-card { padding: 28px 22px; }
  .api-panel { padding: 22px 16px; }
  .code-block pre { font-size: 12.5px; padding: 16px; }
  .model-specs .spec b { font-size: 13.5px; }

  .price-box .pb-value { font-size: 36px; }
  .auth-band { gap: 12px; }
  .auth-chip { padding: 12px 16px; width: 100%; }
  .filter-bar { gap: 8px; }
  .filter-btn { padding: 8px 18px; font-size: 14px; }

  .detail-section { padding: 32px 0 52px; }
  .detail-head { flex-direction: column; gap: 14px; margin-bottom: 28px; }
  .detail-head .mk-icon { width: 60px; height: 60px; }
  .detail-head h1 { font-size: 25px; }
  .detail-grid { grid-template-columns: 1fr; gap: 28px; }
  .detail-side { position: static; }
  .detail-sec h2 { font-size: 20px; }
}