#rewardButton {
    cursor: pointer;
    border: 0;
    outline: 0;
    border-radius: 100%;
    padding: 0;
    margin: 0;
    letter-spacing: normal;
    text-transform: none;
    text-indent: 0px;
    text-shadow: none;
}
#rewardButton span {
    display: inline-block;
    width: 80px;
    height: 30px;
    border-radius: 5px;
    color: #fff;
    font-weight: 400;
    font-style: normal;
    font-variant: normal;
    font-stretch: normal;
    font-size: 20px;
    font-family: "Microsoft Yahei";
    background: #F44336;
}
#rewardButton span:hover{
    background: #F7877F;
}
#QR{
    padding-top:20px;
}
#QR a{
    border:0;
}
#QR img{
    width: 180px;
    max-width: 100%;
    display: inline-block;
    margin: 0.8em 2em 0 2em;
}

@keyframes roll {
    from {
      transform(rotateZ(30deg));
    }
    to {
      transform(rotateZ(-30deg));
    }
}