body{
    background: url("../image/index/background.png") no-repeat;
    background-size:cover;
    width: 100%;
}


.middleBox{
    position: absolute;
    left: 50%;
    top:50%;
    transform: translateX(-400px) translateY(-250px);
    width: 800px;
    height: 500px;
}
.logoBox{
    width:100%;
    height: 100px;
    text-align: center;
    margin-bottom: 20px;
}
.footer{
    margin: 100px auto;
    color: #A1A1A1;
    text-align: center;
}