Hello Olivier,

Thanks for getting in touch.

Please try the following css:

media only screen and (max-width: 690px)
.swiper-container {
margin: 0px 10px;
}

Thanks.

Hey Again,

I am afraid it's not possible to change the mobile margins for a specific row. If you wish to make the Row Full-width you will have to use the Row Settings.

Thanks 

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) {
    .container, .orbit-wrapper .slider-nav, .post-area.standard-minimal.full-width-content .post .inner-wrap {
        max-width: 95% !important;
    }
}

Thanks