.UsBanner img{
    width: 100%;
    margin: 0 auto;
}
.Usmain{
    margin-top: 150px;
    margin-bottom: 150px;
    box-sizing: border-box;
    overflow: hidden;
    position: relative;
}
.Usmain div{
    overflow: hidden;
    width: 50%;
    float: left;
}
.Usmain img{
   width: 100%;
}
.Usmain div:nth-child(2){
    width: 30%;
    position: absolute;
    left:60%;
    top: 50%;
    transform: translate(0,-50%);
}
.Usmain p:nth-child(1){
    font-size: 26px;
    color: black;
}
Usmain p{
    font-size: 18px;
    letter-spacing: 1px;
    color: #949494;
}
/* 如果是移动端 */
@media screen and (max-width: 640px) {
    .Usmain{
        margin-top: 20px;
        margin-bottom: 20px;
        box-sizing: border-box;
        overflow: hidden;
        position: relative;
    }
    .Usmain div{
        display: block;
        width: 100%;
    }
    .Usmain div:nth-child(2){
        position: relative;
        width: 100%;
        left: 0%;
        top: 0;
        transform: translate(0,0);
        background: rgb(218, 218, 218);
        text-align: center;
        padding-top: 10px;
        padding-bottom: 10px;
        margin-top: 10px;
    }
    .Usmain p:nth-child(1){
        font-size: 20px;
        color: black;
    }
   
    .footer {
        position: fixed;
        bottom: 0;
    }
}