.banner {
    position: relative;
    margin: 0 auto;
    width: 100%;
    height: 300px;
    overflow: hidden;
  }
  
  .banner ul,
  ol {
    padding: 0;
    margin: 0
  }
  
  .banner li {
    width: 100%;
    list-style: none
  }
  
  .banner li p {
    position: absolute;
    margin: 0;
    padding: 0;
    left: 0;
    top: 50%;
    text-align: center;
    font-size: 28px;
    height: 38px;
    color: #fff;
    margin-top: -19px
  }
  
  .banner li a {
    text-decoration: none;
    color: #fff
  }
  
  #banner ol {
    width: 42px;
    position: absolute;
    left: 50%;
    bottom: 10px;
    z-index: 1000;
    margin-left: -21px;
    overflow: hidden
  }
  
  #banner ol li {
    float: left;
    background-color: #fff;
    color: #000;
    margin: 2px;
    width: 10px;
    height: 10px;
    display: block;
    text-align: center;
    cursor: pointer;
    border-radius: 50%;
    font-size: 14px;
    text-indent: -999em;
    list-style: none
  }
  
  #banner ol li.active {
    background-color: orange;
    color: #fff
  }
  h1 { margin:150px auto 30px auto; text-align:center;}