.mark-nav {list-style: none;}
.mark-nav > li :hover {background-color: #F5FAFB;}
.mark-nav > li > a {text-decoration: none; font-size: 15px;color:#65C7F7}
<html> <head></head> <body> <ul class="mark-nav"> <li> <a href="#" style="color: red">test1</a> </li> <li> <a href="#">test2</a> </li> <li> <a href="#">test3</a> </li> </ul> </body> </html>
ul标签list-style,定义li的项目符号
a标签text-decoration,定义默认的下划线样式
原文：http://www.cnblogs.com/kkcodin/p/5345171.html