[Theme Horse Support Team]

Hi Felipe,

Our Country Nepal is devastated due to the massive Earth Quake so we are very much sorry for late reply.

If you like to change in responsive.css then you need to make the CSS folder inside child theme and under that CSS folder create a responsive.css file. If you have not created responsive.css inside child theme -> css-> responsive.css then it won’t work. After creating such file then only the responsive layout will be changed.

If you are still unable then you need to hire a developer to fix it.

Thank you!