#nav .menus_items {
    position: absolute;
    width: fit-content;
    left: 50%;
    transform: translateX(-50%);
}

#nav .menus_items .menus_item:hover .menus_item_child{
  display: flex;
}

/* 这里的2是代表导航栏的第二个元素，即有子菜单的元素，可以按自己需求修改 */
.menus_items .menus_item:nth-child(2) .menus_item_child {
    left: -150px;
}

.menus_items .menus_item:nth-child(1) .menus_item_child {
    left: -65px;
}