.banner{
    width: 100%;
}
.banner img{
    display: block;
    width: 100%;
}
.con{
    width: 100%;
    margin:0.5rem 0;
    background-color: #f2f2f2;
}
.con_box{
    width: 9.4rem;
    margin:0 auto;
}
.co_con{
    background: url(../images/co_back.png) no-repeat center;
    background-size: 100%;
    margin-top: 0.4rem;
  }
  .co_con li{
    width: 3.1rem;
    float: left;
    height: 1.6rem;
  }
  .co_con li img{
    display: block;
    margin:0.25rem auto 0.25rem;
    width: 2rem;
    line-height: 1.3rem;
  }