[рони]

alexscus,

<style type="text/css">
    nav li{
      transition: background-color 0s ease-in-out .3s;
    }
    nav li:hover{
        background-color: #FF0000;
        transition-delay: 0s
    }
  </style>
<nav>
<ul>
    <li>text<span>info</span></li>
    <li>text<span>info</span></li>
    <li>text<span>info</span></li>
</ul>
</nav>