@media (max-width:480px){
    .product-banner-button{
        border-radius: 16px;
        -moz-border-radius: 16px;
        -webkit-border-radius: 16px;
    }

    .pc-desc{
       display: none
    }
    .pre-img2{
        display: none
    }
    .pre-img1{
        display: none
    }
    .phone-pre-img2{
        width:100%;
    }
    .phone-pre-img1{
        width:100%;
    }
    .know-detail-button{
        margin-bottom:2rem;
    }
}

@media (min-width:500px){
    .phone-desc{
      display: none
    }
    .phone-pre-img2{
        display: none
    }
    .phone-pre-img1{
        display: none
    }
    .pc-w{
        width:46rem;
    }
}