How to get the timeline horizontally text style on mobile

If you want to change the timeline style to "text horizontal" only on mobile view (look the screenshoot below) enter the code at the end of your functions.php file:

if( function_exists( 'YITH_Multistep_Checkout' ) ){
    if( ! function_exists( 'yith_wcms_timeline_template' ) ){
        function yith_wcms_timeline_template( $pre ){
            if( wp_is_mobile() ){
                $pre = 'text';
            }
            return $pre;
        }
    }

    if( ! function_exists( 'yith_wcms_enqueue_mobile_style' ) ){
        function yith_wcms_enqueue_mobile_style(){
            $css = "@media(max-width: 480px){#checkout_timeline.text li, #checkout_timeline.text li .timeline-wrapper {display: inline;}}";
            wp_add_inline_style( 'yith-wcms-checkout-responsive', $css );
        }
    }

    add_filter( 'pre_option_yith_wcms_timeline_template', 'yith_wcms_timeline_template' );
    add_action( 'wp_enqueue_scripts', 'yith_wcms_enqueue_mobile_style', 20 );
}