Hello,
Could you please try the below CSS in Additional CSS of Theme Customizer
@meadia screen and (max-width: 576px) { .af-main-banner-categorized-posts.express-posts .af-sec-post.list-part .read-title h4, .chromenews_popular_news_widget .banner-vertical-slider .af-double-column.list-style .read-title h4, .aft-banner-layout-tabbed-aligned .aft-thumb-part .read-title h4, .aft-banner-layout-vertical .af-main-banner-thumb-posts .read-title h4, .chromenews_posts_double_columns_widget .af-widget-body .af-double-column.list-style .read-title h4, .aft-trending-posts.list-part .af-double-column.list-style .read-title h4, .four-col-masonry article.col-2 .read-title h4, .four-col-masonry article.latest-posts-grid.col-2 .read-title h4, .widget ul ul li, .widget > ul > li, .widget:not(.chromenews_social_contacts_widget) ul.menu >li, .af-reated-posts .read-title h4, .af-main-banner-latest-posts .read-title h4 { font-size: 14px; } }
Thank you