Hi
If you don’t want to use Child theme, you can try to add these CSS to Appearance > Customize > Additional CSS
#bottom_widget .container .four.columns:nth-child(4) {
display: none;
}
#bottom_widget .container .four.columns:nth-child(3) {
margin-right: 0;
}
#bottom_widget .container .four.columns {
width: 30%;
}
@media only screen and (min-width: 960px) and (max-width: 1199px) {
#bottom_widget .container .four.columns {
width: 30%;
}
}
@media only screen and (min-width: 768px) and (max-width: 959px)
#bottom_widget .container .four.columns {
width: 30%;
}
}
@media only screen and (min-width: 767px) {
#bottom_widget .container .four.columns {
width: 100%;
}
}