#big10y {
    margin-bottom: 30px;
    height: 500px;
    background-image: url(https://images.biggeek.ru/images/10y_mob.png);
    background-size: 800px 500px;
    background-repeat: no-repeat;
    background-position: center center;

    @media (min-width: 800px) {
        background-image: url(https://images.biggeek.ru/images/10y_tab.png);
        background-size: 1200px 500px;
    }

    @media (min-width: 1200px) {
        background-image: url(https://images.biggeek.ru/images/10y_desk.png);
        background-size: 1420px 500px;
    }
}

a#salebanner {
    display: block;
    height: 96px;
    width: 100%;
    background-color: white;
    margin-bottom: 10px;
    background-size: 990px 96px;
    background-repeat: no-repeat;
    background-position: center center;
    background-image: url(https://images.biggeek.ru/images/10y_990.png);
}