.slide-item .item-thumbnail img  { position:absolute; left:0px; top:0px; width:100%; height:100%; object-fit:cover;}
.slide-item .item-thumbnail:after { content:''; position:relative; display:block; padding-bottom:calc(0.6 * 100%); }
.slide-item .item-thumbnail { position:relative; margin:0px auto; }

.slide-item.inner-item .inner-box { position: absolute;    bottom: 0px;    height: 100%;    width: 100%; display:flex; align-items:flex-end;} 
.slide-item.inner-item .inner-box .item-content { width:100%; }