Yep that works (see my recent comment). Also, you’ll need to add it to the footer area of your responsive css around line 4008. Looks like this –
.home-feature-3, .home-feature-4, .home-bottom-sidebar-1, .home-bottom-sidebar-2, .home-bottom-sidebar-3, .home-bottom-sidebar-4, .footer-widgets-1, .footer-widgets-2, .footer-widgets-3, .five-sixths, .four-fifths, .four-sixths, .one-fifth, .one-fourth, .one-half, .one-sixth, .one-third, .three-fifths, .three-fourths, .three-sixths, .two-fifths, .two-fourths, .two-sixths, .two-thirds {
margin: 0;
width: 100% !important;
}