html {
    height: 100%;
  }
  .category_big {
    margin-top: 20px;
    margin-bottom: 50px;
  }
  .category_big .list_content li{
      position: relative;
      height: 40px;
      width: 200px;
      margin-bottom: 10px;
  }
  .category_big .list_content li img {
      position: absolute;
      top:0px;
      bottom:0px;
      left:-130px;
      right:0;
      margin: auto;
  }
  .category_big .list_content li a {
    color: #333;
    display: inline-block;
    padding-left: 57px;
    width: 200px;
    height: 40px;
    line-height: 40px;
    border-radius: 3px;
    background-color: #f5f5f5;
    box-sizing: border-box;
  }
  .category_big .list_content li a:hover {
    background: #ff6600;
    color: #fff;
  }
  
  /*小分类*/
  .category_big .small_category {
      width: 950px;
      margin-left: 50px;
  }
  .category_big .small_category>li {
    margin-bottom: 40px;
  }
  .category_big .small_category li .category_small {
    padding-bottom: 12px;
    border-bottom: 1px solid #E1E1E1;
    color: #333;
  }
  .category_big .small_category li .category_small p {
    font-size: 18px;
    float: left;
  }
  .category_big .small_category li .category_small span {
    display: inline-block;
    margin: 5px 0 0 10px;
   }
  .category_big .small_category li .category_small span i {
    color: #df0000;
  }
  .category_big .small_category li .small_list li {
    float: left;
    width: 170px;
    white-space: nowrap;
    margin-right: 25px;
    margin-top: 15px;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .category_big .small_category li .small_list li:nth-child(5n){
      margin-right: 0;
  }
  .category_big .small_category li .small_list li a {
      color: #616161;
  }
  .category_big .small_category li .small_list li a:hover {
    color: #FF9900;
  }
  .category_big .small_category .category_small a:hover {
      color: #FF9900;
  }