.pc {
    display: block;
}

.mobile {
    display: none;
}

.banner img{
    width: 100%;
}

.banner img{
    width: 100%;
}

.part1 {
    width:100%;
}

.part1 img{
    width: 100%;
}

.part2{
    width: 100%;
    background-color: #fff;
    overflow: hidden;
}

.part2 img{
    width:1395px;
    margin:30px auto 180px auto;
    display: block;
}

.part3{
    width: 100%;
}

.part3 img{
    width: 100%;
    margin-bottom:25px;
}

@media screen and (max-width: 1708px) {
    .part2{
      zoom:.89;
    }
  }
  
  @media screen and (max-width: 1440px) {
    .part2{
      zoom:.75;
    }
  }
  
  @media screen and (max-width: 1366px) {
    .part2{
      zoom:.71;
    }
  }
  
  @media screen and (max-width: 1280px) {
    .part2{
      zoom:.66;
    }
  }
  
  @media screen and (max-width: 1280px) {
    .part2{
      zoom:.53;
    }
  }
  
  @media screen and (max-width: 960px) {
    .part2{
      zoom:.5;
    }
  }

  @media screen and (max-width: 799px) {
    .pc {
        display: none;
    }
    
    .mobile {
        display: block;
    }

    .part2 img{
        width:90%;
        margin:10px auto 80px auto;
        display: block;
    }
  }