.container .first-con{
  position: fixed;
  height: 100vh;
}
.container .banner{
  width: 100%;
  height: 500px;
  background: url('../image/case/banner.jpg') center no-repeat;
  background-size:cover;
  padding: 0 8%;
  box-sizing: border-box;
  color: #fff;
}
.banner .banner-en{
  font-size: 30px;
  padding-top: 240px;
}
.banner .banner-zh{
  font-size: 20px;
  margin-top: 10px;
}

.container .main{
  padding: 0 8% 40px;
  box-sizing: border-box;
  overflow: hidden;
}
.main .nav{
  padding: 20px 0;
  border-bottom: 2px solid rgb(238,238,238);
  font-size: 16px;
  color: rgb(52,52,52);
}
.main .nav a{
  color: rgb(168,168,168);
}
.main .content{
  width: 100%;
}
.main .thePc{
  margin-top: 40px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}
.thePc .comImg{
  width: 45%;
  margin-bottom: 40px;
}
.main .theMob{
  display: none;
}

@media screen and (max-width:768px) {
  .container .banner{
    padding: 0 15px;
  }
  .container .main{
    padding: 0 15px 20px;
  }
  .main .thePc{
    display: none;
  }
  .main .theMob{
    display: block;
    margin-top: 20px;
  }
  .theMob .comImg{
    width: 100%;
    margin-bottom: 20px;
  }
}