.title{
  background-color: #edf2f6;
  line-height: 90px;
  color: #222223;
  font-size: 26px;
  font-weight: 500;
  padding-left: 160px;
}
.content{
  width: 1200px;
  margin:30px auto;
}
.introduce1{
  overflow: hidden;
}
.introduce_content{
  line-height: 40px;
  font-size: 17px;
  text-indent: 2em;
  color: #616161;
}
.introduce_img{
  float: right;
  width: 600px;
  -moz-box-shadow:2px 2px 4px #bfbdbd; -webkit-box-shadow:2px 2px 4px #bfbdbd; box-shadow:2px 2px 4px #bfbdbd;
  margin: 0 0 0 15px;
}
.introduce_img img{
  width: 100%;
  height: 100%;
}
.exhibition_item{
  overflow: hidden;
  margin-top: 30px;
}
.content_item{
  height: 250px;
  float: left;
  width: 380px;
  margin-right: 30px;
  margin-bottom: 30px;
}
.content_item:nth-child(3n){
  margin-right: 0;
}
.content_img{
  height: 200px;
  overflow: hidden;
}
.exhibition_name{
  line-height: 50px;
  display: block;
  text-align: center;
  font-size: 16px;
}
.content_item img{
  width: 100%;
  height: 100%;
  transition: all 0.6s;  
}
.content_item img:hover{
  transform: scale(1.2); /* 放大1.2倍 */
}