@media screen and (max-width: 1200px) {
    .header__number {
        margin-left: 140px;
    }

    .header__btn {
        margin-left: 140px;
    }

    .brashArrowRight {
        margin-left: -50px;
    }

    .brashArrowLeft {
        margin-left: -50px;
    }

    .step2 {
        margin-left: 600px;
    }
}

@media screen and (max-width: 992px) {
    .header {
        background: url("../img/mobileHeaderBG.png") no-repeat;
        background-position: top center;
    }

    .header__number {
        margin-left: 0px;
    }

    .header__btn {
        margin-left: 0px;
    }

    .sertif__text {
        margin: 0px auto;
    }

    #sertif .slider {
        margin: 70px auto;
    }

    .advantage {
        margin-top: 40px;
    }

    .step {
        margin: 40px auto;
    }

    .brashArrowLeft {
        display: none;
    }

    .brashArrowRight {
        display: none;
    }

    #questions .slider {
        margin: 0px auto;
        margin-top: 40px;
    }
}

@media screen and (max-width: 768px) {
    h1 {
        font-size: 42px;
        margin-top: 40px;
    }
    footer a:after {
        display: none;
    }
footer a {
        text-decoration: underline;
    }

}
@media screen and (max-width: 540px) {
    .header__address {
        display: none;
    }
    h1 {
        font-size: 36px;
    }
    .slider {
        width: 100%;
    }
    .step {
        width: 100%;
    }
    .step h3:after {
        width: 90%;
    }
    #about .contacts {
        width: 100%;
    }
    .form {
        width: 100%;
    }
    footer {
        height: auto;
    }
    footer a, footer img, footer span {
        display: block;
        margin: 0px auto;
        padding: 20px;
        text-align: center;
    }
}