.post-box__layer-img {
    width: 100%;
    height: 15vw;
    margin: 0 auto;
}

.post-box__layer-img img {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post-box__layer-img div {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

@media screen and (max-width: 1000px) and (orientation: portrait) {
    .post-box__layer-img {
        height: 25vw;
    }
}