@media only screen and (max-width: 750px) {
  body {
    width: 100%;
    height: auto;
  }

  .banner {
    width: 100%;
    height: 28rem;
    background-size: 100% 100%;
  }
  .nav {
    width: 1100px;
    height: 45px;
    background-size: 100% 100%;
  }
  .nav ul {
    height: 45px;
    line-height: 45px;
  }
  .maincontent {
    width: 100%;
  }

  .fl,
  .fr {
    float: none;
  }

  .pic-news {
    display: block;
    width: 100%;
    height: auto;
  }
  .pic-news li {
    float: none;
    display: block;
    width: 96%;
    padding: 0 2%;
    height: auto;
  }
  .pic-news li img {
    width: 100%;
    height: auto;
  }
  .titbox1 {
    width: 100%;
    height: 5rem;
  }
  .titbox1 i {
    width: 100%;
    height: 5rem;
  }
  .tit_txt1 {
    width: 100%;
    font-size: 1.6rem;
    line-height: 5rem;
  }
  .tit_txt1 a {
    font-size: 1.6rem;
    line-height: 5rem;
  }
  .news_list ul li {
    font-size: 1.8rem;
    line-height: 4rem;
    width: 100%;
    background-position: 2.2rem 4.8rem;
    text-indent: 5.5rem;
  }

  .news_box01 {
    width: 100%;
  }
  .news_list01 ul li {
    overflow: hidden;
    height: 40px;
  }
  .news_list01 ul li a {
    overflow: hidden;
    display: block;
    height: 40px;
    white-space: nowrap;
    text-overflow: ellipsis;
  }
}