Adding Visible Links to Images/ Text

Site URL: https://potato-sphere-g3k8.squarespace.com/

Hi! We would like to add visible links to text under these images so when you put your mouse over the text, it underlines or does something indicating it is a link (each links to a different page). How do you do this? Thanks!!  @tuanphan

Website: naonow.com Password: naonow

Add to Home > Design > Custom CSS

div#page-section-5eae050ded72103d3af701d9 a:hover {
    text-decoration: underline;
}

Thank you!!!