*{ margin:0px; padding:0px;}
body 
{
    line-height:1.5;
    font-family:微软雅黑;
}
a{ text-decoration:none;}
ul,li{ list-style:none; }

ul{ display: flex; justify-content: space-between; flex-wrap: wrap; margin-top:100px; }
ul li{ min-width:30%; text-align:center; }
ul li img{ max-width:100%; vertical-align:middle; }