div{
    overflow: hidden;
    position: relative;
}
div a{
    position: absolute;
    left: 80%;
    top: 1.15%;
    width: 4.5vw;
    height: 2vw;
    /*background: rgba(0, 0, 0, .5);*/
}
div a.lxwm{
    left: 8%;
    top: 0.75%;
    width: 20.5vw;
    height: 6vw;
}
div img{
    max-width: 101%;
    min-width: 100%;
}