/* ========================================
   响应式适配
   ======================================== */

/* ====== 平板 ====== */
@media (max-width: 1024px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

/* ====== 手机 ====== */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .container {
    padding: 0 16px;
  }

  /* 导航栏 */
  .navbar-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 16px;
    border-top: 1px solid var(--color-border);
    box-shadow: 0 4px 12px var(--color-shadow);
    transform: translateY(-200%);
    transition: transform 0.3s ease;
  }

  .navbar-nav.show {
    transform: translateY(0);
  }

  .navbar-nav li {
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
  }

  .navbar-nav li:last-child {
    border-bottom: none;
  }

  .navbar-toggle {
    display: block;
  }

  .navbar-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .navbar-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .navbar-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Hero */
  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content .slogan {
    font-size: 1.05rem;
  }

  /* 统计 */
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .stat-item .value {
    font-size: 2rem;
  }

  /* 产品网格 */
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .product-card .info {
    padding: 12px;
  }

  .product-card .name {
    font-size: 0.95rem;
  }

  /* 企业介绍 */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-images {
    order: -1;
  }

  /* 询价区 */
  .inquiry-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* Footer */
  .footer-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* 产品详情页 */
  .detail-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .product-info h1 {
    font-size: 1.4rem;
  }

  .specs-table th {
    width: 90px;
  }

  /* 区块间距缩小 */
  .section {
    padding: 40px 0;
  }

  .section-title h2 {
    font-size: 1.6rem;
  }
}

/* ====== 小手机 ====== */
@media (max-width: 380px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .hero-content h1 {
    font-size: 1.7rem;
  }
}