.mainbox{
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
    font-size: 16px;
    color: #555;
}
.headbgbox {
    background: url('/images/newbg.jpg') #f8f8f9 top center no-repeat;
    height: 234px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btnlistbpx {
    margin-top: -40px;
    text-align: center;
}

    .btnlistbpx .titbtn {
        display: inline-block;
        color: #333;
        width: 170px;
        height: 42px;
        line-height: 42px;
        background: #fff;
        font-size: 14px;
        text-decoration: none;
        border-radius: 5px;
    }

        .btnlistbpx .titbtn.on {
            color: blue;
        }

.newsbody {
    padding: 20px 50px 50px;
}

.newslist {
    display: flex;
    margin: 20px auto;
}

.itemImg {
    width: 250px;
    height: 150px
}

.itemtxtbox {
    padding: 0px 20px;
    width: 800px;
    display: flex;
    flex-flow: column;
}