#blocksy_ct_posts-3 ct-posts-widget lifirst-child ct-post-title display-webkit-box; -webkit-box-orientvertical; -webkit-line-clamp1; overflowhidden;

This CSS code sets the display property of the first child list item in a widget with the class "blocksy_ct_posts-3" to a webkit box format with vertical orientation. It also limits the text content to one line using the webkit line clamp property and hides any overflow. This is typically used to style blog post titles in a widget or sidebar.