.content-section {
  width: 1140px;
  margin: 0 auto;
  .left-aside {
    width: 140px;
    float: left;
    a {
      font-size: 20px;
      line-height: 30px;
      display: block;
      padding-left: 15px;
      border-left: 5px solid transparent;
      color: #888;
      margin-bottom: 30px;
    }
    .current {
      border-left: 5px solid #F6A623;
      color: #F6A623;
    }
  }

  .show-case-content {
    float: right;
    width: 990px;
    a {
      display: block;
      margin: 0 0 30px 30px;
      float: left;
      img {
        display: block;
        width: 300px;
        height: 200px;
      }
    }
  }
}