.header_nav_contents_inner .header_nav{
    width: calc(100% / 4);
}

img.attachment-post-thumbnail.size-post-thumbnail.wp-post-image {
    width: 100%;
    aspect-ratio: 14 / 7;
    object-fit: contain;
    display: block;
    object-position: center center;
    background-color: #fff;
}