.content{
    width: 100%;
    height: 875px;
    background: url('../images/back.jpg') no-repeat center top;
    overflow: hidden;
}
.version{
    font-size: 22px;
    color: #fff;
    text-align: center;
    margin-top: 529px;
}
.download{
    display: block;
    margin: 46px auto 32px;
    width: 138px;
    height: 64px;
    line-height: 64px;
    background: url('../images/download.png') no-repeat;
    font-size: 22px;
    color: #fff;
    padding-left: 98px;
    border-radius: 38px;
    behavior: url('../PIE/PIE.htc');
}
.info{
    text-align: center;
    color: #fff;
    font-size: 16px;
}
.download:hover{
    background: #fff url('../images/hover.png') no-repeat;
    color: #1294f4;  
}
.hover{
    background: url('../images/download.png') no-repeat!important;
    color: #fff!important;
}

@media all and (max-width:1600px){
    .mt{
        margin-top: -10px;
    }
}
@media all and (max-width:1367px){
    .mt{
        margin-top: -70px;
    }
}