.form-radio {
}

.form-radio::before {
    content: "";
    width: 16px;
    height: 16px;
    display: block;
    background-image: url("../image/form-radio-unactive.png");
    background-size: contain;
    background-repeat: no-repeat;
    margin-top: 1px;
}

.form-radio.active::before {
    background-image: url("../image/form-radio-active.png");
}