.exi1820 .sec02 .pic{width: 74.79%;}
.exi1820 .sec03 li .icon4{width: 180px;}
.exi1820 .sec03 .icon4 img{width: 100%}
.exi1820 .sec04 {
    background: url(../../img/product/exi1800/2.jpg) no-repeat center;
    background-size: cover;
}
@media screen and (max-width: 768px) {
    .exi1820 .sec02 .pic {
        margin: 0 0 0 -5%;
        width: 108%;
    }
    .exi1820 .sec03 li .icon4{width: 29vw;}
    .exi1820 .sec04 {
        background: url(../../img/product/exi1800/sp_1.jpg) no-repeat center;
        background-size: cover;
    }

}