将样式添加到/your-theme/admin-edit-post.css

.inside ul.acf-radio-list.radio.horizontal li label {
 /* styles... */
}

function wpse250000_admin_styles( $hook ) {
    // Bail if we\'re not on the post.php admin page
    if ( \'post.php\' !== $hook ) {
        return;
    }

    // Ensure we\'re looking at a post. Add other post types to array if desired.
    $post_type = get_post_type();
    if ( ! $post_type || ! in_array( $post_type, [ \'post\' ] ) ) {
        return;
    }

    wp_enqueue_style( \'admin-edit-post-styles\', get_template_directory_uri() . \'/admin-edit-post.css\' );
}
add_action( \'admin_enqueue_scripts\', \'wpse250000_admin_styles\' );