*{ margin:0px; padding:0px;}
body 
{
    line-height:1.5;
    font-family:微软雅黑;
}
img{ max-width:100%; vertical-align:middle; }
a{ text-decoration:none;}
ul,li{ list-style:none; }
h2{
  width: 600px; 
  margin: 20px; 
}
.card {
  width: 600px; 
  margin: 20px;
  overflow: hidden;
}