// 广告位logo
.adversing {
  width: 1200px;
  height: 90px;
  margin:0 auto;
  margin-top: 20px;
  margin-bottom: 20px;
  overflow: hidden;
  a {
      display: block;
  }
  img {
      width: 100%;
      height: 90px;
  }  
}