.button-show-more{
    visibility: hidden;
}
@media screen and (max-width: 320px) {
    .text-about-overflow{
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .button-show-more{
        visibility:visible;
        margin: 0 auto;
        display: block;
        content: 'Показать ещё';
        font-family: 'Open Sans';
        src: local('Open Sans Light'),url('/bitrix/js/ui/fonts/opensans/opensans-light.woff') format('woff'),url('/bitrix/js/ui/fonts/opensans/opensans-light.ttf') format('truetype');
        font-weight: 300;
        font-style: normal;
    }
    
}
@media screen and (max-width: 800px) {
    .text-about-overflow{
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .button-show-more{
        visibility:visible;
        margin: 0 auto;
        display: block;
        content: 'Показать ещё';
        font-family: 'Open Sans';
        src: local('Open Sans Light'),url('/bitrix/js/ui/fonts/opensans/opensans-light.woff') format('woff'),url('/bitrix/js/ui/fonts/opensans/opensans-light.ttf') format('truetype');
        font-weight: 300;
        font-style: normal;
    }
}