.about-img{position:relative;cursor:pointer}
.about-icon{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:3;width:70px;height:70px;border-radius:50%;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center}
.about-icon i{font-size:28px;color:#fff}
.about-video{display:none;width:100%;height:auto}
.about-cover{width:100%;display:block}