.navigationBar {
    border-bottom: 1px solid #EAEAEA;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 68px;
    background: #FFFFFF;
  }
  .tab-container {
    width: auto;
    height: 100%;
    display: flex;
    justify-content: space-around;
  }
  .tab {
    width:fit-content;
    width:-webkit-fit-content;
    width:-moz-fit-content;
    font-family: PingFangSC-Medium;
    font-size: 16px;
    color: #343434;
    letter-spacing: 0;
    text-align: right;
    font-weight: 500;
    text-align: center;
    height: 100%;
    line-height: 68px;
    cursor: pointer;
    margin:0 30px;
  }
  .tab-container .tab.active {
    border-bottom: 2px solid #F7BD2C;
  }
  .lesson1{
    width: 100%;
    height: auto;
    background: #F2F2F2;
    display: flex;
    align-items: center;
    flex-direction: column;
  }
  .lesson1 div:nth-child(1){
    width: fit-content;
    height: 50px;
    font-size: 36px;
    color: #222222;
    letter-spacing: 0;
    text-align: center;
    font-weight: 700;
    margin-top: 56px;
  }
  .lesson1 div:nth-child(2){
    width: 296px;
    height: 25px;
    font-size: 18px;
    color: #818284;
    letter-spacing: 0;
    text-align: center;
    font-weight: 400;
    margin-top: 2px;
    letter-spacing: 1px;
  }
  .lesson1 div:nth-child(3){
    width: 930px;
    height: auto;
    font-size: 16px;
    color: #343434;
    letter-spacing: 1px;
    line-height: 26px;
    font-weight: 200;
    margin-top: 37px;
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .lesson1Pic{
    width: 1366px;
    height: 650px;
    overflow: hidden;
    margin-top: 37px;
    margin-bottom: 80px;
  }
  .lesson1Pic img,.lesson1Pic video{
    width: 100%;
    height: 100%;
    object-fit: cover;
  }
  .lesson2{
    width: 100%;
    height:auto;
    background: #FFFFFF;
    border: 2px solid rgba(242,242,242,1);
    display: flex;
    flex-direction: column;
    align-items: center
  }

  .lesson2Card{
    display: flex;
    align-items: center;
    margin: 0 50px;
  }
  .lessonTitle{
    width:145px;
    height: 50px;
    font-size: 36px;
    color: #282828;
    letter-spacing: 0;
    text-align: center;
    font-weight: 700;
    margin-top: 68px;
  }
  .lesson2CardList{
    display: flex;
    margin-top: 68px;
    flex-wrap: wrap;
  }
  .lesson2CardImg{
    width: 56px;
    height: 56px;
    overflow: hidden;
  }
  .lesson2CardImg img{
    width: 100%;
    height: 100%;
    object-fit: contain;
  }
  .lesson2CardText{
    margin-left: 20px;
    display: flex;
    flex-direction: column;
    width:fit-content;
  }
  .lesson2CardText div{
    width: fit-content;
    white-space: normal;
    text-align: left;
  }
  .lesson2CardList>.lesson2CardList01:last-child{
    margin-bottom:100px;
  }
  .lesson2CardText div:nth-child(1){

    font-size: 18px;
    color: #282828;
    letter-spacing: 0;
    line-height: 22px;
    font-weight: 600;
    height: auto;
  }
  .lesson2CardText div:nth-child(2){
    margin-top: 4px;
    font-size: 14px;
    color: #B1B1B1;
    letter-spacing: 0;
    line-height: 22px;
    font-weight: 400;
    max-width:368px;
    min-width: 288px;
  }
  .lesson2CardList{
    display:flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    height: 100%;
  }
  .lesson2CardList01,.lesson2CardList02{
    width:auto;
    margin-bottom: 52px;
    display:grid;
    grid-template-columns: repeat(2,1fr);
    grid-gap: 52px;
  }



  .lesson3{
    width: 100%;
    height:auto;
    background: #F2F2F2;
    display: flex;
    flex-direction: column;
    align-items: center
  }
  .lesson3Table{
    margin-top: 71px;
    width: 985px;
    height:auto;
    overflow: hidden;
    margin-bottom: 64px;
  }
  .lesson3Table img{
    width: 100%;
    height: 100%;
    object-fit: contain;
  }
  .lesson4{
    width: 100%;
    height: auto;
    background: #FFFFFF;
    display: flex;
    flex-direction: column;
    align-items: center
  }
  .lesson5{
    width: 100%;
    height: 339px;
    background-color: #F2F2F2;
    display: flex;
    flex-direction: column;
    align-items: center
  }
  .lesson5>div:nth-child(2){
    display:flex;
    align-items: center;
    justify-content: center;
    width: auto;
    height: auto;
    margin-top: 66px;
    font-family: PingFangSC-Regular;
    font-size: 18px;
    color: #282828;
    letter-spacing: 0;
    text-align: left;
    line-height: 22px;
    font-weight: 400;
    margin-bottom:130px;
  }
  .lesson6{
    width: 100%;
    display: flex;
    align-items: center;
    flex-direction: column;
    height: 536px;
  }
  .lesson6>div:nth-child(2){
    width: 272px;
    height: 22px;
    margin-top: 16px;
    font-family: PingFangSC-Regular;
    font-size: 16px;
    color: #B1B1B1;
    letter-spacing: 0;
    text-align: center;
    font-weight: 400;
  }
  .lesson6Form{
    margin-top: 34px;
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom:95px;
  }
  .lesson6FormName,.lesson6FormCode{
    background: #FFFFFF;
    border: 1px solid #D8D8D8;
    border-radius: 2px;
    width: 308px;
    height: 46px;
    padding-left:13.4px;
  }
  .lesson6FormPhone{
    /* width: 190px; */
    width:308px;
    height: 46px;
    background: #FFFFFF;
    border: 1px solid #D8D8D8;
    border-radius: 2px;
    /* margin-right: 8px; */
    padding-left:13.4px;
  }
  .lesson6Form>div{
    margin-bottom: 16px;
  }
  .lesson6FormSendCode{
    width: 108px;
    height: 46px;
    background: #E8E8E8;
    border-radius: 2px;
  }
  .lesson6FormSubmit{
    width: 152px;
    height: 45px;
    border: 1px solid #59595C;
    border-radius: 2px;
    font-family: PingFangSC-Medium;
    font-size: 16px;
    color: #59595C;
    background-color: #fff;
    margin-top: 21px;
  }
  @media(max-width:1500px){
    .lesson1Pic{
      width:1024px;
      height:500px;
    }
  }
  @media(max-width:1200px){
    .lesson1Pic{
      width:768px;
      height:400px;
    }
  }
  @media(max-width:1024px){
    .lesson2Card{width:auto}
    .lesson2CardList01{width:100%}
    .lesson2CardText div:nth-child(1){white-space: normal;}
    .lesson2CardText,.lesson2CardText div:nth-child(2){width:100%;}
    .lesson2CardText div:nth-child(2){min-width:0;}
  }
  @media(max-width:990px){
    .header ul{display:none;}
    .lesson2CardList01{width:100%}
    .navigationBar{height:auto;}
    .tab-container{flex-wrap:wrap;}
    .lesson1 div:nth-child(3),.lesson5>div:nth-child(2){width: 100%;padding: 0 20px;}
    .lesson2CardList01,.lesson2CardList02{
      grid-template-columns:repeat(1,1fr);
      grid-auto-flow: row;
    }
    .lesson1Pic {width:360px;height:210px}
    .lesson3Table{width:360px;}
    .lesson2Card{justify-content:center;}
    .lesson2CardList01{padding:0 20px;}
    
    .lesson2Card{width:100%;margin:0}
  }