.sub_links{display:flex;flex-wrap:wrap;margin-bottom:50px;margin-top:50px;justify-content:center}.sub_links a{display:block;margin:0 20px 5px}.sub_links a i{margin-right:5px}@media only screen and (max-width:768px){.sub_links a{margin:0 0 5px;width:50%}}@media only screen and (max-width:640px){.sub_links a{margin-bottom:10px;width:100%}}