.live_title {
      margin: 5% 0;
    }

    .live_box {
      font-size: 16px;
      /* overflow: hidden; */
      overflow-y: scroll;
      height: 500px;
    }

    .live_box li {
      display: block;
      height: 87px;
      position: relative;
    }

    .live_content_icon {
      float: left;
      position: absolute;
      margin-top: 2%;
    }

    .live_content_time {
      float: left;
      margin-left: 4%;
      padding: 2% 0;
      position: absolute;
    }

    .live_content {
      float: left;
      margin-left: 4%;
      padding: 2% 1%;
      position: absolute;
      left: 10%;
      width: 80%;
      border-bottom: 1px dashed #c8c8c8;
    }

    .live_y {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      border: 3px solid #deedf9;
    }

    .live_x {
      height: 70px;
      width: 3px;
      background: #deedf9;
      position: absolute;
      left: 9px;
      top: 20px;
    }

    .live_box li:hover .live_y {
      background: #51a3e1;
    }

    .live_box li:hover .live_content_time {
      color: #51a3e1;
      font-size: 20px;
    }

    .live_box li:hover .live_content {
      background: #51a3e1;
      color: #fff;
      font-size: 20px;
    }

    .img_line {
      border-left: 1px dashed #c8c8c8;
    }
    .aboutUs{
        padding-bottom: 2%;
    }

    .aboutUs_top {
      background: #fff;
      margin-top: 3%;
      padding: 6% 4% 8% 4%;
    }

    .aboutUs_footColor {
      background: #ecf0f5;
      width: 90%;
      height: 3rem;
      margin-left: 5%;
    }

    .aboutUs_img {
      /* padding-left: 15%; */
      display: flex;
      justify-content: center;
    }

    .course_img img {
      width: 43%;
      text-align: center;
    }

    .course_img {
      text-align: center;
    }

    .course_box {
      width: 100% ;
      background: #fff;
      padding-bottom: 4%;
    }

    /* 手机样式 */

    @media (max-width: 767px) {
      .live_content_time {
        font-size: 12px;
        margin-left: 7%;
      }
      .live_box {
        padding: 0 3%;
      }
      .live_content {
        font-size: 12px;
        padding-left: 9%;
      }
      .live_box li:hover .live_content_time {
        display: none;
      }
      .live_box li:hover .live_content {
        background: #51a3e1;
        color: #fff;
        font-size: 14px;
      }
      .live_title {
        font-size: 20px;
        font-weight: bold;
      }
    }