body main #top_bn ul li,
      body main #bottom_bn ul li {
        width: 190px !important;
        margin: 0px 0px 20px 10px !important;
      }

      body main #top_bn .bn_wrapper,
      body main #bottom_bn .bn_wrapper {
        width: 1000px;
        margin: 0 auto;
        padding-top: 50px;
      }

      body main #top_bn .big_bn,
      body main #bottom_bn .big_bn {
        display: block;
        width: 400px;
        float: left;
      }

      body main #top_bn .big_bn img,
      body main #bottom_bn .big_bn img {
        width: 400px;
        border-radius: 4px;
        border: #000 solid 1px;
      }

      body main #top_bn ul,
      body main #bottom_bn ul {
        float: right;
        width: 1000px;
        margin: 0 auto;
        display: flex;
        flex-wrap: wrap;
        justify-content: flex-start;
        align-items: baseline;
        align-content: flex-start;
        padding: 0px 0;
      }

      body main #top_bn ul li,
      body main #bottom_bn ul li {
        width: 0px;
        margin: 0px 5px 20px 5px;
      }

      body main #top_bn ul li img,
      body main #bottom_bn ul li img {
        border-radius: 4px;
        border: #000 solid 1px;
      }