[Support request] Grid layout with equal size grid

1. WordPress only filters the length of an automatic excerpt. Manual Excerpts will display whatever you add as their content. Aside of editing each manual excerpt, or removing them, you can try adding this PHP Snippet to trim Manual Excerpts.

add_filter( 'get_the_excerpt', function( $excerpt, $post ) {
    if ( has_excerpt( $post ) ) {
        $excerpt_length = apply_filters( 'excerpt_length', 55 );
        $excerpt_more   = apply_filters( 'excerpt_more', ' ' . '[…]' );
        $excerpt        = wp_trim_words( $excerpt, $excerpt_length, $excerpt_more );
    }
    return $excerpt;
}, 10, 2 );

With that in place we can look at the rest of the layout – but your site is considerably different to Adobe so we many not able to replicate that exact look.

2. Primary Category is not a feature of WordPress – I assume you’re using Yoast to generate the Primary Category ? If so – this is the only article i have found to GET their Primary Category for display purposes:

https://www.tannerrecord.com/how-to-get-yoasts-primary-category/

The author provides more detail in his GIST on how to get the category for displaying in a theme:

https://gist.github.com/tarecord/4c7171b9955aee41d91db133af3e1d8f

Couple of things – first is to set a max/min height of the images and then force the containers to be the same height:

@media(min-width: 769px) {
  .generate-columns .inside-article .post-image img {
    min-height: 150px;  
    max-height: 150px;
    width: auto;
  }
  
  .generate-columns:not(.featured-column) .inside-article {
    display: flex;
    flex-direction: column;
  }
}

Are you going to keep the Featured Column post ? As this complicates this design.

Note you can reduce the space between images / title / summary by changing the Content Separator
in Customizer > Layout > Container.

Hmmm… that should work fine. But i updated the CSS above to make it a little more specific.