关于标题的上划线的有关问题

关于标题的下划线的问题

CSS code

.index4 h2 {display:inline-block;    FONT-SIZE: 14px;     FONT-FAMILY: "宋体", "Verdana", "Arial", "Helvetica";    LINE-HEIGHT: 20px;    font-weight: normal;    line-height:25px;    margin:0;    padding:0;    text-decoration:none;