.ic_refresh {
    width: 24px;
    height: 24px;
    cursor: pointer;
    vertical-align: middle;
}

.captcha_img {
    width: 240px;
    height: 52px;
}

.div_middle {
    display: flex;
    justify-content: center;
    align-items: center;
}

@media(max-width: 767px) {
    .captcha_img {
        width: 150px;
        height: 52px
    }
}