/* ===================================
   响应式断点
   992px: 平板/小笔记本
   768px: 平板竖屏
   480px: 手机
   =================================== */

/* ---- 平板 ---- */
@media (max-width: 992px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .products-full-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(4, 1fr); gap: 0; }
  .stat-item { border-right: 1px solid rgba(255,255,255,0.1); border-bottom: none; }
  .stat-item:last-child { border-right: none; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }

  .about-intro { grid-template-columns: 1fr; gap: 40px; }
  .about-img-wrap { aspect-ratio: 16/9; }

  .detail-layout { grid-template-columns: 1fr; gap: 40px; }

  .contact-layout { grid-template-columns: 1fr; gap: 36px; }
  .contact-card { padding: 36px 28px; }

  .cta-card { padding: 52px 36px; }
}

/* ---- 平板竖屏 / 大手机 ---- */
@media (max-width: 768px) {
  :root { --nav-height: 62px; }

  .section { padding: 60px 0; }

  /* 导航 */
  .nav-links { display: none; }
  .nav-phone { display: none; }
  .nav-contact { display: none; }
  .nav-social { display: none; }
  .hamburger { display: flex; }
  .logo img { height: 26px; }
  .navbar .container { gap: 6px; padding: 0 8px; justify-content: space-between; }
  .lang-switch-btn { font-size: 0.7rem !important; padding: 5px 8px !important; gap: 3px !important; }
  .lang-switch-btn svg { width: 12px !important; height: 12px !important; }
  #langCurrent { font-size: 0.7rem; }

  /* 隐藏 Hero 标语 */
  .hero-badge { display: none; }

  /* 首页展示行 → 竖排 */
  .showcase-row { flex-direction: column; gap: 28px; padding: 28px 20px; }
  .showcase-row.showcase-reverse { flex-direction: column; }
  .showcase-img { width: 100%; min-height: 220px; }
  .showcase-body { padding: 0; }

  /* 服务流程 → 竖排 */
  .process-steps { grid-template-columns: 1fr; gap: 20px; }

  /* 筛选栏 → 横向滚动 */
  .filter-bar .container { flex-wrap: nowrap; overflow-x: auto; gap: 6px; padding-bottom: 4px; }
  .filter-btn { white-space: nowrap; flex-shrink: 0; font-size: 0.78rem; padding: 7px 14px; }

  /* Hero */
  .hero-content { padding-top: calc(var(--nav-height) + 32px); padding-bottom: 80px; }
  .hero-btns { flex-direction: column; align-items: flex-start; }
  .hero-btns .btn { width: 100%; max-width: 280px; justify-content: center; }

  /* 产品网格 */
  .products-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .products-full-grid { grid-template-columns: 1fr 1fr; gap: 16px; }

  /* 特色 */
  .features-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .feature-card { padding: 24px 16px; }

  /* 统计 */
  .stats-grid { grid-template-columns: repeat(4, 1fr); gap: 0; }
  .stat-item { border-right: 1px solid rgba(255,255,255,0.1); border-bottom: none; }
  .stat-item:last-child { border-right: none; }

  /* Footer */
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  /* 认证 */
  .cert-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }

  /* 团队 */
  .team-grid { grid-template-columns: repeat(2, 1fr); }

  /* CTA */
  .cta-card { padding: 40px 24px; border-radius: var(--radius-lg); }
  .cta-actions { flex-direction: column; gap: 12px; }
  .cta-divider { display: none; }

  /* 联系页 */
  .info-grid { grid-template-columns: 1fr; }

  /* 面包屑不显示 */
  .breadcrumb { display: none; }

  /* 关于 */
  .about-intro { grid-template-columns: 1fr; }
}

/* ---- 手机 ---- */
@media (max-width: 480px) {
  .container { padding: 0 14px; }

  .section { padding: 40px 0; }
  .section-header { margin-bottom: 28px; }
  .section-title { font-size: 1.4rem; }
  .section-desc { font-size: 0.85rem; }

  /* 单列布局 */
  .products-grid { grid-template-columns: 1fr; gap: 14px; }
  .products-full-grid { grid-template-columns: 1fr; gap: 14px; }
  .features-grid { grid-template-columns: 1fr; gap: 14px; }
  .cert-grid { grid-template-columns: 1fr 1fr; gap: 10px; }

  /* Hero */
  .hero { min-height: auto; padding-bottom: 20px; }
  .hero-content h1 { font-size: 1.7rem; }
  .hero-content p { font-size: 0.9rem; }
  .hero-scroll-hint { display: none; }
  .hero-badge { display: none; }

  /* 产品卡片 */
  .product-card { border-radius: 10px; }
  .product-info { padding: 12px 14px 14px; }
  .product-info h3 { font-size: 0.9rem; }
  .product-tag { font-size: 0.68rem; padding: 3px 8px; }

  /* 展示行 */
  .showcase-row { padding: 20px 14px; border-radius: 12px; }
  .showcase-name { font-size: 1.15rem; }
  .showcase-desc { font-size: 0.85rem; }

  /* 统计 */
  .stats { padding: 36px 0; }
  .stat-num { font-size: 1.3rem; }
  .stat-label { font-size: 0.68rem; }

  /* Footer */
  .footer { padding: 36px 0 0; }
  .footer-grid { gap: 22px; }
  .footer-tagline { font-size: 0.8rem; }

  /* 详情页 */
  .gallery-thumbs { gap: 6px; }
  .gallery-thumb { width: 52px; height: 52px; }
  .detail-info h1 { font-size: 1.2rem; }
  .specs-table td { font-size: 0.8rem; padding: 8px 10px; }

  /* 联系卡片 */
  .contact-card { border-radius: var(--radius-lg); padding: 24px 16px; }

  /* 返回顶部 */
  .back-to-top { bottom: 16px; right: 12px; width: 38px; height: 38px; }

  /* 面包屑 */
  .breadcrumb { display: none; }

  /* CTA */
  .cta-card { padding: 32px 20px; }
  .cta-card h2 { font-size: 1.2rem; }
  .cta-card p { font-size: 0.85rem; }
  .cta-phone-num { font-size: 1.3rem; }
  .cta-actions { flex-direction: column; gap: 10px; }
  .cta-divider { display: none; }

  /* 页面头 */
  .page-header { padding: calc(var(--nav-height) + 16px) 0 28px; }
  .page-header h1 { font-size: 1.5rem; }
  .page-header p { font-size: 0.82rem; }

  /* 联系页 */
  .contact-detail { gap: 10px; }
  .contact-icon { width: 36px; height: 36px; }
  .map-btns { flex-direction: column; }
  .map-btns .btn { width: 100%; justify-content: center; }

  /* 筛选栏 */
  .filter-bar { padding: 8px 0; }
  .filter-label { font-size: 0.75rem; }
  .filter-btn { font-size: 0.72rem; padding: 6px 12px; }

  /* 用户分享卡片 */
  .community-card h3 { font-size: 0.9rem; }
  .community-card p { font-size: 0.8rem; }
  .detail-modal-dialog { width: 94vw; max-height: 90vh; }
}

/* ---- 超小屏 ---- */
@media (max-width: 360px) {
  .hero-content h1 { font-size: 1.8rem; }
  .section-title { font-size: 1.5rem; }
  .btn { padding: 11px 22px; font-size: 0.9rem; }
}