[Theme Horse Support Team]

Hi Kai,

Sorry menu is working fine in smartphones. You can check our theme demo https://www.themehorse.com/preview/ultimate-pro in your same smartphone. We have found below css code which is overriding the main css file. Remove it and it will be fine.

#access ul li ul {
position: absolute;
background-color: rgba(58, 176, 219, 0.9);
top: 50px;
left: 0;
width: 250px;
}

Thank you!