How to set an image for subheadings in WordPress?

Question

WordPress

Good afternoon! How can I add images to subcategories. Of course, I want to do without using the plugin.
I would like to get something like this:

The code for obtaining child categories itself:

<div class=" subcat">
       <ul>
        <?php
        if (count(get_categories('child_of='.$cat)))
            if (is_category()) {
                $current_cat=get_query_var('cat');
                wp_list_categories('child_of='.$current_cat.'&title_li=&show_count=1');} ?>

       </ul>
        
    </div>

In the css file I prescribe the general styles for the subcat class. Then I assign styles for a specific subcategory: .cat-item-13{background:url(/images/topUI13.jpg) ;} and so on. And the situation is as follows, that the picture does not appear. And if you set a color in the background instead of the background image, then the color changes to the specified one. Maybe someone came across or someone knows why the background image may not appear?

Answer 1

remove the slash ( / ) before images