@media screen and (max-width: 767px) {
    .wpcf7 form .form-block,
    .wpcf7 form .form-block.form-block-full,
    .wpcf7 form .form-block.form-block-bottom {
        flex-basis: 100%;
    }

    .wpcf7 form .form-block.form-block-bottom {
        flex-direction: column;
        row-gap: 30px;
    }
}