.article-box .pic-list li{
    padding-bottom: 10px;
}
.article-box .pic-list li .pic{
    border:none;
}
.article-box .pic-list li .pic i{
    display: block;
    width: 85%;
    height: 300px;
    margin: 10px auto;
}

@media screen and (max-width: 750px){
    .article-box .pic-list li{
        padding-bottom: .5rem;
    }
    .article-box .pic-list li .pic i{
        width: 85%;
        height: 17rem;
        margin: 0.5rem auto;
    }
    .article-box .pic-list li p{
        font-size: .8rem;
    }
}