.inner_width_70 .alignfull{
  margin-left  : calc( -50vw + 15% );
  margin-right : calc( -50vw + 15% );
  width: 100%  important;
}

@media screen and (min-width: 992px) {

    .inner_width_70{
      width: 70%;
    }

    .inner_width_70 .alignwide{
        width    : calc( 100% + 30% );
    }

}