.div_bottom {
    width: 100%;
    height: 100%;
    margin: 0 auto;
    background-color: #333333;
    color: #a3a3a3;
}
.div_bottom .ctbox {
    padding-top: 20px;
    position: relative;
    height: 200px;
    text-align: center;
}
.div_bottom .footericons {
    display: flex;
    justify-content: space-around;
    align-items: center;
    width: 1000px;
    margin: 0 auto;
    margin-bottom: 40px;
}
.div_bottom .ctbox .contactinfo {
    text-align: center;
}
.div_bottom .qrcode {
    position: absolute;
    top: 50px;
    right: 60px;
}
.div_bottom .qrcode_mobile {
    /*position: static;*/
    display: none;
}
@media screen and (max-width: 650px) {
    .div_bottom {
        height: 120px;
        display: flex;
        justify-content: center;
        align-items: center;
        margin-bottom: 50px;
    }
    .div_bottom .ctbox {
        display: none;
    }
    .div_bottom .qrcode_mobile {
        display: block;
        width: 90px;
        height: 90px;
    }
}