.weixin_code_box {
    width: 302px;
    border: 1px solid #ddd;
    padding: 20px 10px 40px 10px;
    position: fixed;
    left: 50%;
    margin-left: -151px;
    background-color: #fff;
    display: none;
}

.weixin_code_box h5 {
    margin: 0;
}
.weixin_code_box span{
    width: 16px;
    height: 16px;
    position: absolute;
    right: 10px;
    top: 10px;
    color: #999;
    text-decoration: none;
    font-size: 16px;
    cursor: pointer;
}
.weixin_code_box p {
    font-size: 13px;
    line-height: 22px;
    margin: 0;
    color: #555;
}

#weixinCodeBox {
    width: 200px;
    height: 200px;
    margin: 20px auto;
}
.top0{
    top:0!important;
    transform: translateX(-50%)!important;
}
.top50{
    top:50%!important;
    transform: translate(-50%,-50%)!important;
}