.news-bg>img{
    width: 100%;
    height: auto;
}
.about-cont{
    width: 1200px;
    margin: 80px auto;
    overflow: hidden;
}
.partner-list{
    border: 1px solid #ddd;
    margin: 10px;
    float: left;
    width: calc((100% - 110px) / 5);
}
.partner-list>img{
    width: 100%;
    height: auto;
}