/* ============================================
   Dropdown Menu Responsive Styles
   响应式断点优化版本
   ============================================ */

/* ============================================
   基础样式 - 全宽显示
   ============================================ */

.dropdown-menu {
  left: 0 !important;
  right: 0 !important;
  width: 100% !important;
  max-width: 100% !important;
  overflow-x: hidden !important;
  box-sizing: border-box !important;
  transform: none !important;
  display: flex !important;
  justify-content: center !important;
  align-items: flex-start !important;
}

.dropdown-menu > .dropdown-content-container {
  max-width: 1600px !important;
  width: 100% !important;
  margin: 0 auto !important;
  padding: 0 !important;
}

.dropdown-menu > .container {
  max-width: 1600px !important;
  width: 100% !important;
  margin: 0 auto !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
}

.dropdown-menu > .container.mx-auto {
  margin-left: auto !important;
  margin-right: auto !important;
}

.dropdown-menu > .dropdown-content-container > .flex,
.dropdown-menu > .container > .flex {
  display: flex;
  flex-wrap: nowrap;
  gap: 0;
  margin: 0 auto !important;
  max-width: 1600px !important;
  justify-content: center !important;
}

/* ============================================
   超大屏幕 (≥1440px) - 完整四列布局
   ============================================ */

@media (min-width: 1440px) {
  .dropdown-menu > .dropdown-content-container > .flex,
  .dropdown-menu > .container > .flex {
    flex-wrap: nowrap;
    padding: 24px 0 !important;
    margin: 0 auto !important;
    max-width: 1600px !important;
    justify-content: center !important;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .category-column,
  .dropdown-menu > .container > .flex > .category-column {
    width: 240px;
    max-width: 240px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .subcategory-column,
  .dropdown-menu > .container > .flex > .subcategory-column {
    width: 280px;
    max-width: 280px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .info-column,
  .dropdown-menu > .container > .flex > .info-column {
    width: 500px;
    max-width: 500px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .related-links-column,
  .dropdown-menu > .container > .flex > .related-links-column {
    width: 240px;
    max-width: 240px;
    flex-shrink: 0;
  }
}

/* ============================================
   大屏幕 (1280px - 1439px) - 四列布局，缩小列宽
   ============================================ */

@media (min-width: 1280px) and (max-width: 1439px) {
  .dropdown-menu > .dropdown-content-container > .flex,
  .dropdown-menu > .container > .flex {
    flex-wrap: nowrap;
    padding: 24px 0 !important;
    margin: 0 auto !important;
    max-width: 1400px !important;
    justify-content: center !important;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .category-column,
  .dropdown-menu > .container > .flex > .category-column {
    width: 220px;
    max-width: 220px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .subcategory-column,
  .dropdown-menu > .container > .flex > .subcategory-column {
    width: 260px;
    max-width: 260px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .info-column,
  .dropdown-menu > .container > .flex > .info-column {
    width: 440px;
    max-width: 440px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .related-links-column,
  .dropdown-menu > .container > .flex > .related-links-column {
    width: 220px;
    max-width: 220px;
    flex-shrink: 0;
  }
}

/* ============================================
   中等屏幕 (1024px - 1279px) - 三列布局
   隐藏相关链接列，合并到产品信息列
   ============================================ */

@media (min-width: 1024px) and (max-width: 1279px) {
  .dropdown-menu > .dropdown-content-container > .flex,
  .dropdown-menu > .container > .flex {
    flex-wrap: nowrap;
    padding: 20px 0 !important;
    margin: 0 auto !important;
    max-width: 1200px !important;
    justify-content: center !important;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .category-column,
  .dropdown-menu > .container > .flex > .category-column {
    width: 240px;
    max-width: 240px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .subcategory-column,
  .dropdown-menu > .container > .flex > .subcategory-column {
    width: 280px;
    max-width: 280px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .info-column,
  .dropdown-menu > .container > .flex > .info-column {
    width: 440px;
    max-width: 440px;
    flex-shrink: 0;
    border-right: none;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .related-links-column,
  .dropdown-menu > .container > .flex > .related-links-column {
    display: none;
  }
  
  .info-column .info-related-links {
    display: block;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #e5e7eb;
  }
}

/* ============================================
   大平板 (896px - 1023px) - 三列布局
   ============================================ */

@media (min-width: 896px) and (max-width: 1023px) {
  .dropdown-menu > .dropdown-content-container > .flex,
  .dropdown-menu > .container > .flex {
    flex-wrap: nowrap;
    padding: 16px 0 !important;
    margin: 0 auto !important;
    max-width: 900px !important;
    justify-content: center !important;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .category-column,
  .dropdown-menu > .container > .flex > .category-column {
    width: 180px;
    max-width: 180px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .subcategory-column,
  .dropdown-menu > .container > .flex > .subcategory-column {
    width: 200px;
    max-width: 200px;
    flex-shrink: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .info-column,
  .dropdown-menu > .container > .flex > .info-column {
    width: 320px;
    max-width: 320px;
    flex-shrink: 0;
    border-right: none;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .related-links-column,
  .dropdown-menu > .container > .flex > .related-links-column {
    display: none;
  }
  
  .info-column .info-image {
    max-height: 160px;
  }
  
  .info-column .info-stats {
    grid-template-columns: repeat(2, 1fr);
    width: 360px !important;
    min-width: 360px !important;
    max-width: 360px !important;
    margin: 0 auto 16px auto !important;
  }
}

/* ============================================
   小平板 (768px - 895px) - 两列布局
   ============================================ */

@media (min-width: 768px) and (max-width: 895px) {
  .dropdown-menu > .dropdown-content-container > .flex,
  .dropdown-menu > .container > .flex {
    flex-wrap: wrap;
    padding: 16px 0 !important;
    gap: 0;
    margin: 0 auto !important;
    max-width: 800px !important;
    justify-content: center !important;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .category-column,
  .dropdown-menu > .container > .flex > .category-column {
    width: 45%;
    border-right: none;
    border-bottom: 1px solid #e5e7eb;
    padding-bottom: 16px;
    margin-bottom: 16px;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .subcategory-column,
  .dropdown-menu > .container > .flex > .subcategory-column {
    width: 45%;
    border-right: none;
    border-bottom: 1px solid #e5e7eb;
    padding-bottom: 16px;
    margin-bottom: 16px;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .info-column,
  .dropdown-menu > .container > .flex > .info-column {
    width: 100%;
    border-right: none;
    padding-left: 0;
  }

  .dropdown-menu > .dropdown-content-container > .flex > .related-links-column,
  .dropdown-menu > .container > .flex > .related-links-column {
    display: none;
  }
  
  .info-column .info-image {
    max-height: 140px;
  }
  
  .info-column .info-stats {
    grid-template-columns: repeat(3, 1fr);
    width: 100% !important;
    min-width: auto !important;
    max-width: 100% !important;
  }
}

/* ============================================
   移动端 (<768px) - 单列手风琴布局
   ============================================ */

@media (max-width: 767px) {
  .dropdown-menu {
    position: fixed;
    top: 60px;
    left: 8px;
    right: 8px;
    width: calc(100% - 16px);
    max-width: calc(100% - 16px);
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    overflow-x: hidden;
    border-radius: 12px;
    transform: none;
    box-sizing: border-box;
  }
  
  .dropdown-menu > .container > .flex {
    flex-direction: column;
    padding: 12px;
    gap: 0;
  }

  .dropdown-menu > .container > .flex > .category-column,
  .dropdown-menu > .container > .flex > .subcategory-column,
  .dropdown-menu > .container > .flex > .info-column,
  .dropdown-menu > .container > .flex > .related-links-column {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #e5e7eb;
    padding: 12px 0;
  }

  .dropdown-menu > .container > .flex > .category-column {
    border-bottom: none;
    padding-top: 0;
  }

  .dropdown-menu > .container > .flex > .subcategory-column {
    display: none;
  }
  
  .dropdown-menu > .container > .flex > .subcategory-column.active {
    display: block;
    animation: slideDown 0.3s ease;
  }

  .dropdown-menu > .container > .flex > .info-column {
    display: none;
  }
  
  .dropdown-menu > .container > .flex > .info-column.mobile-show {
    display: block;
  }

  .dropdown-menu > .container > .flex > .related-links-column {
    display: none;
  }
  
  .info-column .info-image {
    max-height: 120px;
  }
  
  .info-column .info-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .info-column .info-button {
    min-height: 48px;
  }
  
  .category-item {
    cursor: pointer;
    user-select: none;
  }
  
  .category-item a {
    pointer-events: none;
  }
  
  .category-item .fa-chevron-right {
    transition: transform 0.3s ease;
  }
  
  .category-item.expanded .fa-chevron-right {
    transform: rotate(90deg);
  }
}

/* ============================================
   动画效果
   ============================================ */

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   触摸设备优化
   ============================================ */

@media (hover: none) and (pointer: coarse) {
  .category-item a,
  .subcategory-link {
    min-height: 48px;
    padding: 14px 16px;
  }
  
  .info-button {
    min-height: 52px;
    padding: 14px 20px;
  }
  
  .stat-card {
    padding: 16px 12px;
  }
  
  .category-item:hover,
  .category-item.active {
    background: rgba(0, 71, 107, 0.06);
  }
}

/* ============================================
   下拉菜单动画
   ============================================ */

.dropdown-menu {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: 
    opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    visibility 0.3s cubic-bezier(0.4, 0, 0.2, 1),
    transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.group:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}



/* ============================================
   内容更新动画
   ============================================ */

.info-image,
.info-title,
.info-stats,
.related-links-list {
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.info-image.updating,
.info-title.updating,
.info-stats.updating {
  opacity: 0;
  transform: scale(0.95);
}

/* ============================================
   移动端特殊处理
   ============================================ */

@media (max-width: 767px) {
  .dropdown-menu {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
  }
  
  .dropdown-menu .mobile-close-btn {
    display: flex;
  }
}

@media (min-width: 768px) {
  .dropdown-menu .mobile-close-btn {
    display: none;
  }
}

/* ============================================
   横屏模式优化
   ============================================ */

@media (max-width: 767px) and (orientation: landscape) {
  .dropdown-menu {
    max-height: calc(100vh - 60px);
  }
  
  .info-column .info-image {
    max-height: 100px;
  }
}

/* ============================================
   高分辨率屏幕优化
   ============================================ */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .dropdown-menu {
    border-width: 0.5px;
  }
}

/* ============================================
   打印样式
   ============================================ */

@media print {
  .dropdown-menu {
    display: none !important;
  }
}