.banner{position:relative}.banner img,.banner video{filter:brightness(.8);width:100%}.banner .banner-txt-box{color:#fff;left:50%;position:absolute;text-align:center;top:50%;transform:translate(-50%,-50%)}@media screen and (max-width:640px){.banner{height:250px}.banner img,.banner video{left:0;-o-object-fit:cover;object-fit:cover;-o-object-position:center;object-position:center;position:absolute;top:30px}.banner h1{font-size:20px}}