body{margin:0;font-family: "微软雅黑","宋体",Arial, Helvetica, sans-serif;font-size:12px;
    /* line-height:1.5; */
    line-height:1;
}
    /* 
        逗号隔开，后退机制
    */
    h1,h2,h3,h4,h5,h6{margin:0;font-size:100%;font-weight:normal;}
    ul,ol{list-style:none;margin:0;padding:0;}
    p,dl,dd{margin:0;}
    img{vertical-align: bottom;border:none;}
    a{text-decoration: none;color:#333;}
    strong,b{font-weight: normal;}
    i,em{font-style:normal;}
    table{border-spacing: 0; border-collapse: collapse;
                             /* 边框合并（折叠） */
    }
    /* 根据实际情况添加 */
    th{font-weight: normal;text-align: left;vertical-align: top;}
    td{text-align: left;vertical-align: top;}

    input{margin:0;padding:0;border:none; font-family:inherit;}
    input,textarea{outline:none; /*轮廓线*/}
    textarea{
        resize:none;/* 禁止用户重置元素大小 */
        overflow:auto;
        font-family: inherit;
    }
    .clearfix:before,
.clearfix:after {
  content: "";
  display: table;
}

.clearfix:after {
  clear: both;
  content: "";
  display: block;
}

.clearfix {
  *zoom: 1;
  /*IE/7/6*/
}

.fl {
  float: left !important;
}

.fr {
  float: right !important;
}
.teacherWrap {
  padding: 0 0.3rem;
  margin-bottom: 0.6rem;
  line-height: .3rem;
}

.teacher {
  padding: 0.3rem;
  background: #fafafe;
  border-radius: 0.12rem;
  display: flex;
}

.teacherImg {
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  margin-right: 0.3rem;
  flex-shrink: 0;
}

.teachertxt {
  color: #9494af;
  font-size: 0.26rem;
  flex: auto;
  line-height: .36rem;;
}

.teacherName {
  line-height: 0.3rem;
  color: #444452;
  font-size: 0.3rem;
  font-weight: bold;
  margin-bottom: 0.17rem;
}
.iframe-video {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  }
  .iframe-video iframe,
  .iframe-video object,
  .iframe-video embed {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  }