.stContent {margin:20px auto;    width:96%; }
.stContent>div{
     width:100%; 
  }
 
 
 
 *试题class*
 
.tm{ max-width: 98%;  min-width: 100px;min-height: 20px;  margin:10px auto; }
.tmnr{ max-width: 95%;  min-width: 100px;min-height: 20px;  margin:5px; line-height:30px; text-indent:2em; }

 
.tiankong{ border-bottom:solid 1px black; display:inline-block; line-height:20px; height:20px; min-width:50px; padding:0 5px;text-align:center;}
.xuanxiang{ list-style:none; display: -webkit-flex;display: flex; justify-content:space-around; align-items: center; width:1200px;flex-wrap: wrap;}
.xuanxiang>li>span:first-child{ padding:5px; display:inline-block; width:20px; text-align:center; font-weight:bolder;}
.xuanxiang>li>div{  display:inline-block;  text-align:center;  min-height:20px;}
.twoItem li,.threeItem li,.fourItem li{ float:left;  min-height:20px;}
.twoItem li{ width:45%;}
.threeItem li{width:32%;}
.fourItem li{ width:22%;}
.xiaokuohao{ display:inline-block; padding:0 5px;}
.xiaokuohao>span:nth-child(2){display:inline-block; line-height:20px; height:20px; min-width:30px; padding:0 5px; text-align:center;}

.cailiao p{  min-height:50px; width:100%; margin:5px auto; text-indent:2em;}



 
.tips{display: -webkit-flex;display: flex; justify-content:flex-start; margin-bottom:20px; flex-wrap:wrap;}
.tip{ color:Red; font-weight:bold; font-size:1.4em;}
.jiexi{ line-height:30px;}
.xiangguantip{font-weight:bold; font-size:1.6em; margin:0 auto; text-align:center; margin-bottom:10px; display:block;}
.xiangguans{ margin:20px auto;}
.xiangguans ul li{ padding-bottom:10px; border-bottom:dashed 1px #DCDCDC;}
.shiti>ul>li{ margin-bottom:20px; border-bottom:solid 1px #DCDCDC; padding-bottom:30px;}
.shiti ul li a{ display:inline-block; float:right; color:Red;}






/*试题列表*/
.sJlist>li{ margin:20px 0; border-bottom:solid 1px #DCDCDC;position:relative; padding-bottom:40px;}
.sJlist>li>div{ color:#888888; margin:10px 0;}
.sJlist>li>a{ min-height:25px; line-height:25px;}

.xuanxiang{ width:98%; display: -webkit-flex;display: flex; justify-content:space-between; flex-wrap:wrap; }
.xuanxiang>li{ min-width:45%; max-width:98%; width:auto; }

.xuanxiang>li div{  display:inline; text-align:left;}

  /*相关分类*/
 .fenlei{width:96%; margin:20px auto; height:25px; line-height:25px; display: -webkit-flex;display: flex; justify-content:space-around; font-size:1.4em; border-bottom:solid 1px #EDEDED;}