.news-bg>img{
    width: 100%;
    height: auto;
}
.about-cont{
    width: 1200px;
    margin: 0 auto;
}
.us-title{
    text-align: center;
    font-size: 40px;
    color: #333;
    /* font-weight: bold; */
    margin: 40px 0 60px;
}
.us-cont{
    color: #666;
    font-size: 16px;
}