.menu{list-style: none; padding: 0px;} 
.item-content{display: none;}
.item{position: relative;font-size: 14px;color: #121212;line-height: 24px;}
.item .iconfont:first-child{color: #71737b;margin-right: 5px;}
.item .iconfont:last-child{position: absolute;font-size: 12px;color: #71737b;right: 0;line-height: 24px;}
.item-content h3{
  font-size: 14px;
  transition: all .7s ease 0s;
  line-height: 40px;
  display: block;
  margin: 0px 25px; 
  font-weight: normal;
}
.item-content h3:hover{
  padding-left: 10px;
}
.item-content .selected{
  padding-left: 10px;
  color: #FF8431;
}
.item-content a{
  color: #1D1D1D;
  text-decoration: none;
}
.leftmenu{
  float: left;
  margin-left:50px;
}
.contentBox{
  max-width:890px;   float: right;
}

.contentBox img{
  width:100%;  
}
.joinwrap{
  max-width: 1200px;
  margin: 0 auto;
}
.joinfzmail{
  width: 328px;
  padding-bottom: 16px;
}
@media screen and (max-width: 1280px) {
  .contentBox{
    max-width:74%;
}
}