[Theme: Travelify] Customizing containers

Hi! At first, I apologize because English isn’t my native language.
So, I’ve been working in this homepage (http://www.japonia.es/) and I have to pass into WordPress (http://www.happycherry.es/), because their owners want to edit sliders or texts. But, I don’t know how to put the slider and texts only in one container (without the double square?), and keeping the responsive option. I hope I can get an answer, thank you.