/* 去除button默认样式 */
button::after {
border: none;
}
button {
background-color: transparent;
padding-left: 0;
padding-right: 0;
line-height:inherit;
}
button {
border-radius:0;
}
<div class="person-messagebox"><div class="left-message"><a href="/leng0920"><img src="/B/E/0/3_leng0920" class="avatar_pic" username="leng0920"></a></div><div class="middle-message"><div class="title"><span class="tit "><a href="/leng0920" data-report-click="{"mod":"popu_379","ab":"new"}" target="_blank">人间至味是清欢</a></span><!-- 等级,level --><img class="identity-icon" src="/identity/blog5.png"> </div><div class="text"><span>原创文章 103</span><span>获赞 21</span><span>访问量 22万+</span></div></div><div class="right-message"><a class="btn btn-sm bt-button personal-watch" data-report-click="{"mod":"popu_379","ab":"new","extend1":"个人信息未关注"}">关注</a><a href="/im/main.html?userName=leng0920" target="_blank" class="btn btn-sm bt-button personal-letter">私信</a></div></div></div>