Post slider image height

I’m still new to WordPress/Enfold and I’m trying to set the thumbnail for a post slider to the same height.
In the link of the test page, the post slider after the first image has one thumbnail that is at 1210 x 420, and the others 1080 x 420.
I want them all to appear at a certain height, preferably the same height as the one with the 1210 x 420 dimension.
The slider’s image size is set to “Entry without sidebar (1210×423)”.

Below is the custom css I added over the course of solving multiple issues, so some of them may be working against each other. I would appreciate any advice about the custom css below or any additional one(s) that could achieve the look I want.

#top .avia-content-slider .slide-entry-title { font-size: 1em; }

#top .post-entry .blog-categories {
  	font-size: 0.9em;
    font-weight: normal; }

#top .content .entry-content-wrapper {
	padding-right: 0px;
}

#top .avia-slideshow-inner {
	float: center;
}

#top .avia-content-slider .slide-entry-wrap {
	float: center;
}

#top .avia-content-slider-inner {
	margin: 0px;
	overflow: hidden !important;
}

#top .avia-content-slider　{
	display: flex;
}

#top .avia-content-slider　.slide-image img{
	height: auto !important;
}

.avia_desktop .avia-content-slider .avia-slideshow-arrows a{ opacity: 1; }

@media only screen and (max-width: 479px)
{
	.responsive #top #wrap_all .slide-entry{width:48%; margin-left:4%}
	.responsive #top #wrap_all .avia-content-slider-even .slide-entry.slide-parity-odd,
	.responsive #top #wrap_all .avia-content-slider-odd .slide-entry.slide-parity-even{margin:0; clear:both;}
	.responsive #top #wrap_all .avia-content-slider-odd  .slide-entry.first{margin-left:0; width:100%;}
	.responsive .avia-content-slider .slide-image img { width: 100%; }
	.responsive #top .avia-slideshow-arrows a{ 
		display:block !important; 
		opacity: 1; 
		font-size: 20px; 
		width: 60px;
		height: 60px;
		top: 30%;
    margin: -30px 0 0;
		text-align: center;
	}
}

#top .scroll-down-link {
    height: 60px;
    width: 80px;
    margin: 0px 0 0 -40px;
    line-height: 60px;
    position: absolute;
    left: 50%;
    bottom: 25px;
    color: #263238;
    text-align: center;
    font-size: 70px;
    z-index: 100;
    text-decoration: none;
	  text-shadow: 0px 0px 5px rgba(0, 0, 0, 0);
}