/* 三级导航菜单样式 - Mega Menu风格 */

/* 导航容器 */
.nav-cont {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  z-index: 1000;
  overflow: hidden;
  transition: height 0.3s ease-out;
}

/* Mega Menu 内容区 */
.nav-cont-menu.mega-menu {
  display: none;
  padding: 24px 0;
}

.nav-cont-menu.mega-menu .nav-content {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 二级菜单项（带三级菜单的分类） */
.nav-category {
  flex: 0 0 auto;
  min-width: 200px;
  max-width: 280px;
}

.nav-category-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px;
  margin-bottom: 12px;
  border-radius: 6px;
  background: linear-gradient(135deg, #f0f7ff 0%, #e6f3ff 100%);
  transition: all 0.2s ease;
}

.nav-category-header:hover {
  background: linear-gradient(135deg, #e6f3ff 0%, #d9edff 100%);
  transform: translateX(2px);
}

.nav-category-icon {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 6px;
  overflow: hidden;
}

.nav-category-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.nav-category-info {
  flex: 1;
  min-width: 0;
}

.nav-category-title {
  font-size: 14px;
  font-weight: 600;
  color: #1890ff;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-category-desc {
  font-size: 12px;
  color: #8c8c8c;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 三级菜单列表 */
.nav-third-level {
  padding-left: 12px;
}

.nav-third-item {
  margin-bottom: 8px;
}

.nav-third-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 4px;
  color: #333;
  font-size: 13px;
  text-decoration: none;
  transition: all 0.2s ease;
  position: relative;
}

.nav-third-link::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: #1890ff;
  border-radius: 2px;
  transition: height 0.2s ease;
}

.nav-third-link:hover {
  background: #f5f5f5;
  color: #1890ff;
  padding-left: 16px;
}

.nav-third-link:hover::before {
  height: 16px;
}

.nav-third-name {
  flex: 1;
  font-weight: 500;
}

.nav-third-desc {
  font-size: 11px;
  color: #999;
  margin-left: auto;
}

/* 没有三级菜单的二级菜单项（旧版兼容） */
.nav-item-box {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 6px;
  transition: all 0.2s ease;
  text-decoration: none;
  color: #333;
}

.nav-item-box:hover {
  background: #f5f5f5;
  transform: translateY(-2px);
}

.nav-item-box img {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  border-radius: 4px;
}

.item-box-title .title {
  font-size: 14px;
  font-weight: 600;
  color: #333;
  margin-bottom: 4px;
}

.item-box-title .desc {
  font-size: 12px;
  color: #8c8c8c;
}

/* 空菜单占位 */
.nav-cont-menu.nav-cont-empty {
  display: none;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .nav-cont {
    display: none !important;
  }
  
  .nav-cont-menu.mega-menu {
    padding: 16px 0;
  }
  
  .nav-cont-menu.mega-menu .nav-content {
    flex-direction: column;
    gap: 16px;
  }
  
  .nav-category {
    max-width: 100%;
  }
}

/* 加载动画 */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.nav-cont-menu.animated {
  animation: fadeInDown 0.3s ease-out;
}