@media screen and (max-width: 450px){
    body{
        font-size: 10px;
    }
    #banner{
        height: 4rem;
    }
    #banner .title{
        font-size: 0.4rem;
        padding: 0.1rem;
    }
    #contact-section{
        width: 100vw;
        padding: 0.2rem;
        margin-top: 0;
    }
    .top-list .left{
        display: none;
    }
    #contact-section .head{
        margin-bottom: 0.5rem;
    }
    .top-list .right .item{
        display: block;
        width: 100%;
    }
    .top-list .right .item .content span{
        font-size: 0.25rem;
        color: #999;
    }
    .top-list .right .item .content h3{
        margin-bottom: 0.1rem;
        font-size: 0.3rem;
    }
    .top-list .right .item .img{
        width: 100%;
        margin-bottom: 0.2rem;
    }
    .bottom-list{
        display: none;
    }
}