/*
 * TerrazzoCo 响应式样式
 * 适配平板和手机端
 * ============================================ */

/* ===== 平板 (≤1024px) ===== */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(3, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .applications-grid { grid-template-columns: repeat(2, 1fr); }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .product-detail-grid { grid-template-columns: 1fr; }
  .project-detail { grid-template-columns: 1fr; }
  .product-gallery { position: static; }

  .slide-content h1 { font-size: 2.5rem; }
  .page-banner { padding: 130px 0 50px; }
}

/* ===== 手机 (≤768px) ===== */
@media (max-width: 768px) {
  :root { --header-height: 70px; }

  /* 隐藏桌面导航，显示汉堡菜单 */
  .header-top { display: none; }

  .mobile-menu-toggle { display: flex; }

  .main-nav {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    background: #fff;
    box-shadow: 2px 0 15px rgba(0,0,0,0.1);
    padding: 80px 20px 30px;
    transition: left 0.3s ease;
    z-index: 2000;
    overflow-y: auto;
  }
  .main-nav.open { left: 0; }
  .main-nav ul { flex-direction: column; }
  .main-nav a { padding: 12px 16px; font-size: 1rem; }

  .submenu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding-left: 15px;
  }

  /* 移动端菜单覆盖 */
  .nav-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 1500;
    display: none;
  }
  .nav-overlay.show { display: block; }

  /* 轮播 */
  .hero-slider {
    height: 50vh;
    min-height: 350px;
  }
  .slide-content h1 { font-size: 1.8rem; }
  .slide-content p { font-size: 1rem; }

  /* 网格变为1列 */
  .features-grid,
  .products-grid,
  .news-grid,
  .projects-grid,
  .applications-grid,
  .about-grid,
  .contact-grid,
  .footer-grid { grid-template-columns: 1fr; }

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

  /* Section padding */
  .section { padding: 50px 0; }
  .section-title { margin-bottom: 30px; }
  .section-title h2 { font-size: 1.6rem; }

  /* 表单 */
  .form-row { grid-template-columns: 1fr; }

  /* CTA */
  .cta-box { padding: 40px 20px; }
  .cta-box h2 { font-size: 1.5rem; }

  /* 页面Banner */
  .page-banner { padding: 100px 0 40px; }
  .page-banner h1 { font-size: 1.8rem; }

  /* 搜索 */
  .search-input-group { flex-direction: column; }
  .search-input-group button { width: 100%; }

  /* 统计 */
  .about-stats { grid-template-columns: repeat(2, 1fr); gap: 15px; }
  .stat-number { font-size: 1.5rem; }

  /* 产品详情 */
  .main-image { aspect-ratio: 4/3; }
  .product-actions { flex-direction: column; }
  .product-actions .btn { width: 100%; justify-content: center; }

  /* 文章导航 */
  .article-navigation { flex-direction: column; gap: 10px; }
  .article-navigation a { max-width: 100%; }

  /* Footer */
  .site-footer { padding: 40px 0 0; }

  /* 回到顶部 */
  .scroll-top { bottom: 20px; right: 20px; width: 40px; height: 40px; font-size: 1rem; }
}

/* ===== 小手机 (≤480px) ===== */
@media (max-width: 480px) {
  .team-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .slider-controls { bottom: 20px; }
  .slider-prev,
  .slider-next { width: 36px; height: 36px; font-size: 0.9rem; }
}