@YIVAN – add this css to the end of your base.css file and check
@media screen and (min-width:750px){
#Banner-template--22660447666460__image_banner_hw4FHP .banner__heading,
#Banner-template--22660447666460__image_banner_hw4FHP .banner__text,
#Banner-template--22660447666460__image_banner_hw4FHP .banner__buttons a{color:#fff;}
}