html{
    font-family:"Microsoft YaHei",Arial,Helvetica,sans-serif;
}
body{
    background:#208edd;
}
a{
    text-decoration:none;
}
.desc{
    display:block;
    text-align:center;
    color:#fff;
    font-style:italic;
}
.desc:nth-of-type(1){
    font-size:14px;
    margin-top:-22px;
}
.desc:nth-of-type(2){
    margin-top:22px;
    font-size:17px;
}
.download-btn{
    -webkit-border-radius:45px;
    display:block;
    margin:45px auto 27px;
    background:#fff;
    color:#4e4e4e;
    line-height:45px;
    width:250px;
    text-align:center;
}
.qrcode{
    display:block;
    width:110px;
    height:110px;
    margin:0 auto;
}
.download-guide{
    background:rgba(0,0,0,.9);
    position:fixed;
    left:0;
    top:0;
    z-index:99;
    width:100%;
    height:100%;
}
.download-guide:before{
    content:"";
    display:block;
    position:absolute;
    right:0;
    top:0;
    z-index:999;
    width:165px;
    height:160px;
    background:url(../../img/download-guide.png) no-repeat;
    background-size:100%;
}