ＨＴＭＬ代码：

<div class="link link-miss">

        <span class="icon"></span>

         <a href="#" class="button">

                 <span class="line line-top"></span>

                 <span class="line line-right"></span>

                 <span class="line line-bottom"></span>

                 <span class="line line-left"></span>

                 MISSION

         </a>

</div><!--link link-miss结束-->

ＣＳＳ代码：

.link .button{

    　 display: block;

        width: 180px;

        height: 50px;

        line-height: 50px;

        color: #2dcb70;

        text-decoration: none;

        font-family: arial;

        font-weight: bolder;

        border: 2px solid rgba(255,255,255,0.8);

        padding-left: 20px;

        margin: 0 auto;

}