.item{

}
.item_2 {
  background:#F9F9F9;
  text-align: center;
  line-height: 0;
}
.item_3 {
  background:url(3.jpg) no-repeat top center;
  text-align: center;
  line-height: 0;
}
.item_4 {
  background:url(4.jpg) no-repeat top center;
  text-align: center;
  line-height: 0;
}
.item .item_content{
  width: 1200px;
  margin: 0 auto;
  position: relative;
}
.item .item_content .pop1{
  background: red;
  width: 175px;
  height: 41px;
  position:absolute;
  top: 333px;
  right:56px;
  cursor: pointer;
  display: block;
}
.item .item_content .pop2{
  background: yellow;
  width: 175px;
  height: 41px;
  position:absolute;
  top: 559px;
  right:56px;
  cursor: pointer;
  display: block;
}
.m-popc1 .pop-con {
  background:#fff;
  padding:0;
  border-radius: 25px;
  -webkit-border-radius: 25px;
  -moz-border-radius: 25px;
  -ms-border-radius: 25px;
  -o-border-radius: 25px;
}
.m-popc1 {
  width:100%;
  height:100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 99;
}
.m-popc1 .main{
  width:100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 100%;
  overflow-y: auto;
}
.m-popc1 .main img{
  width: 100%;
  height: auto;
  max-width: 600px;
}