.img1 {
    /* 盾示意图 */
    position: absolute;
    left: 60%;
    top: 25%;
    width: 400px;
    opacity: 1;

}
.img2 {
    position: absolute;
    left: 60%;
    top: 20%;
    width: 500px;
    opacity: 1;

}


.video{
    position : absolute;
}