.introduction-video{display:block;margin-bottom:16px}.introduction-video__thumbnail{cursor:pointer}.introduction-video__thumbnail:after{content:"";display:block;position:absolute;left:0;top:0;width:100%;height:100%;z-index:1;background-color:#0000004d;opacity:0;transition:opacity .28s ease-in-out}.introduction-video__thumbnail .play-button{z-index:2;opacity:.5;transition:opacity .28s ease-in-out}.introduction-video__thumbnail:hover:after{opacity:1}.introduction-video__thumbnail:hover .play-button{opacity:.8}.introduction-video__thumbnail:hover .play-button:hover{opacity:1}