On mobile not usable

Hi.
Thank you for contacting us.
I have checked your site on mobile, I was still able to click on the category menu to open the submenu. i.imgur.com/WgF7XML.png
You need to touch one time to the category to open the sub-menu. Yes, maybe it needs to add the toggle icon for the touch action. We will check and improve it soon.
Thanks.

Hi.
Just touch a one-time menu item, and it will open the submenu like this: i.imgur.com/emDHTlK.png
If you click more one time, it will open the menu link.
We will improve that function in the next time.
Thanks.