Hey Again,

Add this into the Custom CSS box in your Salient Theme Options panel (We write all Custom CSS in the Live Browser to ensure accuracy. If you cannot see any changes, make sure there is no red cross in the Custom CSS Box as any syntax error would cause all CSS under that line of code to not show up on the Frontend):

@media only screen and (max-width: 690px) {
    .nectar-global-section.before-footer .wpb_column:not([class*="vc_col-xs"]) .child_column {
        width: 25% !important;
    }
}

Thanks

Hey Again,

The CSS provided was a quick fix, if you wish to alter the mobile layout then you would have to adjust the Column Width on the Mobile Viewport here: http://themenectar.com/docs/salient/page-builder-columns/#width . 

Thanks

Hey Again,

You need to adjust the Inner Column Widths as well for it to show up as needed or use the below CSS.

Add this into the Custom CSS box in your Salient Theme Options panel (We write all Custom CSS in the Live Browser to ensure accuracy. If you cannot see any changes, make sure there is no red cross in the Custom CSS Box as any syntax error would cause all CSS under that line of code to not show up on the Frontend):

@media (min-width: 690px) {
    .vc_col-sm-6.vc_col-xs-12.wpb_column .vc_col-sm-4 {
        width: 33.33333333% !important;
    }
}

Thanks 

Hey Again,

This might explain it better: https://wpbakery.com/video-academy/responsive-column-control-width-offset-param-usage-explained/ .

Thanks