.block-post_thumbnail-wrapper{
    aspect-ratio:1 / 0.272;
    background-position:center;
    background-repeat:no-repeat;
    background-size:cover;
    border-radius:6px;
}

@media screen and (max-width: 900px) {
   .block-post_thumbnail-wrapper{
        aspect-ratio:1 / 0.4;
    }
}

@media screen and (max-width: 500px) {
   .block-post_thumbnail-wrapper{
        aspect-ratio:1 / 1;
    }
}