.banner {
    position: relative;
  }
  .banner .w1600 {
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
  }
  .banner .txt p {
    color: #fff;
  }
  .banner .txt p.t1{
  font-weight: 600;
  }
  
  .ctn1 {
    background-color: #f2f3f5;
    padding: 5% 0;
    width: 100%;
    overflow: hidden;
  }
  .ctn1 .details {
    width: 100%;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  .ctn1 .details .txt {
    width: 47%;
  }
  .ctn1 .details .txt p {
    color: #333;
    font-weight: 600;
  }
  .ctn1 .details .txt span {
    display: inline-block;
    color: #000;
    margin-top: 5%;
  }
  .ctn1 .details .txt .des {
    display: inline-block;
    color: #000;
    margin-top: 0%; 
  }
  .ctn1 .details .img {
    width: 44.44%;
    overflow: hidden;
  }
  .ctn1 .details .img img {
    transition: all .5s;
  }
  .ctn1 .details .img:hover img {
    transform: scale(1.05);
  }
  .ctn1 ul {
    width: 100%;
    display: flex;
    justify-content: space-between;
    margin-top: 5%;
  }
  .ctn1 ul li {
    width: 20%;
  }
  .ctn1 ul li div {
    color: #439d72;
  }
  .ctn1 ul li div p,
  .ctn1 ul li div span {
    display: inline-block;
  }
  .ctn1 ul li div p {
    font-weight: 600;
  }
  .ctn1 ul li i {
    display: inline-block;
    color: #555;
    font-style: normal;
  }
  .ctn2 {
    width: 100%;
    overflow: hidden;
    padding: 6% 0;
  }
  .ctn2 .concept {
    width: 100%;
    --swiper-navigation-color: #333;
    /* 单独设置按钮颜色 */
    --swiper-navigation-size: 20px;
    /* 设置按钮大小 */
  }
  .ctn2 .concept .swiper-slide {
    border-right: 1px solid #e8e8e8;
    height: auto;
    padding-bottom: 2.5%;
    
    width: 25%;
  }
  .ctn2 .concept .swiper-slide::after {
    content: '';
    width: 50px;
    height: 3px;
    background-color: #ccc;
    position: absolute;
    bottom: 0;
    left: 7%;
  }
  .ctn2 .concept .swiper-slide > div {
    width: 86%;
    margin: 0 auto;
  }
  .ctn2 .concept .tit p,
  .ctn2 .concept .tit span {
    display: inline-block;
    color: #222;
    width:100%
  }
  .ctn2 .concept .tit p {
    font-weight: bold;
  }
  .ctn2 .concept .pic {
    position: relative;
    margin: 15% 0;
  }
  .ctn2 .concept .pic .num_code {
    position: absolute;
    top: 0;
    left: 0;
  }
  .ctn2 .concept .pic .img {
    width: 90%;
    margin: 0 auto;
    border-radius: 100%;
    overflow: hidden;
  }
  .ctn2 .concept .pic .img img {
    transition: all 1s;
  }
  .ctn2 .concept .pic .img:hover img {
    transform: scale(1.05);
  }
  .ctn2 .concept .des {
    color: #222;
  }
  .ctn2 .concept .swiper-button-next,
  .ctn2 .concept .swiper-button-prev {
    width: 60px;
    height: 60px;
    border-radius: 100%;
    background-color: #fff;
    margin-top: -60px;
    transition: all 0.5s;
    
    display:none
  }
  .ctn2 .concept .swiper-button-next:hover,
  .ctn2 .concept .swiper-button-prev:hover {
    --swiper-navigation-color: #fff;
    background-color: #1e4b99;
  }
  .ctn3 {
    width: 100%;
    overflow: hidden;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  .ctn3 .course_l {
    width:100%;
    /*
    padding-left: 12.5%;
    background: url('../images/f63ff3cd-5103-41d5-9ef9-8b25071eba74.jpg') no-repeat center center;
    background-size: 100%;
    */
  }
  .ctn3 .course_l > div {
   
    height: 100%;
    position: relative;
  }
.ctn3 .course_l > div .swiper-scrollbar{
width: 100%;
    height: 3px;
    position: absolute;
    bottom: 0;
    left: 0;
}
  /*
.ctn3 .course_l > div .swiper-scrollbar {
    position: absolute;
    left: 0;
    top: 10%;
    bottom: 10%;
    width: 1px;
  }
  .ctn3 .course_l > div .swiper-scrollbar-drag {
    background: #000;
    width: 2px;
  }
*/
 .ctn3 .course_l > div .swiper-scrollbar-drag {
    background: #2e3f8e;
}
  .ctn3 .course_l .tit {
    color: #333;
        font-weight: 600;
  }
/*
  .ctn3 .course_l .course {
    position: absolute;
    height: auto;
    bottom: 20%;
    left: 20%;
    right: 11%;
    top: 20%;
  }
*/
  .ctn3 .course_l .course .swiper-slide {
    display: flex;
    flex-direction: column;
  }
.ctn3 .course_l .course .swiper-slide .year{padding: 40px 0 20px;
    border-bottom: 2px solid #d8d9dc;color:#020202;font-size:24px;}
.ctn3 .course_l .course .swiper-slide .des{
	margin-top:45px;
}
.ctn3 .course_l .course .swiper-slide .des p{display: flex;margin-bottom: 40px;}
.ctn3 .course_l .course .swiper-slide .des p span:nth-child(1){font-size: 20px;
    width: 90px;
    color: #333333;}
.ctn3 .course_l .course .swiper-slide .des p span:nth-child(2){font-size: 16px;
    color: #333333;    width: calc(100% - 90px);}
  .ctn3 .course_r {
    width: 100%;position: relative;
  }
.ctn3 .course_r .tit{
position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    z-index: 5;
    color: #fff;
}
  .ctn3 .course_r .img {
    overflow: hidden;
  }
  .ctn3 .course_r .img img {
    transition: all 1s;
  }
  .ctn3 .course_r .img:hover img {
    transform: scale(1.05);
  }
  .ctn4 {
    width: 100%;
    overflow: hidden;
    padding: 8% 0 6%;
  }
  .ctn4 .w1600 {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  .ctn4 .w1600 .img {
    width: 42.91%;
    overflow: hidden;
  }
  .ctn4 .w1600 .img img {
    transition: all 1s;
  }
  .ctn4 .w1600 .img:hover img {
    transform: scale(1.05);
  }
  .ctn4 .w1600 .txt {
    width: 100%;
    color: #333;
  }
  .ctn4 .w1600 .txt .tit {
    margin-bottom: 2%;
    font-weight: 600;
  }
  .ctn4 .w1600 .txt ul {
    width: 100%;
    display: flex;
    justify-content: space-between;
    margin-top: 4%;flex-wrap: wrap;
  }
.ctn4 .w1600 .txt ul li:nth-child(1){
    /*width:100%;*/
 
   margin-bottom: 30px;
}
.ctn4 .w1600 .txt ul li:nth-child(1) hr{width: 90%;}
.ctn4 .w1600 .txt ul li:nth-child(1) span{ margin-top: 10px;}
  .ctn4 .w1600 .txt ul li {
    width:50%;
    position: relative;
  }
  .ctn4 .w1600 .txt ul li::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    bottom: 20%;
    width: 1px solid #ccc;
  }
  .ctn4 .w1600 .txt ul li:nth-last-child(1)::after {
    display: none;
  }
  .ctn4 .w1600 .txt ul li p {
    font-weight: 600;
  }
.ctn4 .w1600 .txt ul li hr{
width:80%;
  margin-left:0
}
  .ctn4 .w1600 .txt ul li span {
    display: inline-block;
    width: 99%;
    margin-top:10px;
    line-height: 1.8;
    color:#888888;
  }
  .ctn4 .w1600 .txt a {
    display: inline-block;
    color: #fff;
        background-color: #284093;
    border-radius: 5px;
    margin-top: 5%;
    padding: 8px 25px;
  }
  .ctn4 .w1600 .txt a .icon{width: 30px;
      height: 30px;
      margin-right: 7px;}
.ctn3 .course_l .course .swiper-slide:hover p{color: #82d806;}
.ctn3 .course_l .course .swiper-slide:hover span{color: #82d806;}
  @media screen and (max-width: 1600px) {
 
  }
  @media screen and (max-width: 1440px) {
 
  }
  @media screen and (max-width: 1366px) {
    .ctn2 .concept .swiper-button-next,
    .ctn2 .concept .swiper-button-prev {
      width: 40px;
      height: 40px;
      --swiper-navigation-size: 15px;
    }
    .ctn3 .course_l .course .swiper-slide .year{
    font-size: 20px;
    }
    .ctn3 .course_l .course .swiper-slide .des p span:nth-child(1){
        font-size: 18px;width: 80px;
    }
    .ctn3 .course_l .course .swiper-slide .des p span:nth-child(2){
    	font-size: 14px;width: calc(100% - 80px);
    }
  }

  @media screen and (max-width: 1200px) {
  
  }
  @media screen and (max-width: 998px) {
    .ctn3 .course_r .img img{width: 200%;}
    .ctn2 .concept .swiper-wrapper{flex-wrap: wrap;}
    .ctn2 .concept .swiper-slide{width: 100%;border: 0;margin-bottom: 40px;}
    .ctn2 .concept .pic{margin: 5% 0;}
    .ctn4 .w1600 .txt ul{flex-wrap: wrap;}
    .ctn4 .w1600 .txt ul li {
        width: 100%;
    margin-bottom: 30px;
  }
    .ctn4 .w1600 .txt ul li:nth-child(1) hr{width: 80%;}
    .ctn4 .w1600 .txt ul li span{margin-top:0!important}
    .ctn2 .concept .tit p,
    .ctn2 .concept .tit span {
      width: 100%;
    }
    .ctn1 .details .txt span {
      margin-top: 3%;
    }
    .ctn1 .details .txt,
    .ctn1 .details .img {
      width: 100%;
    }
    .ctn1 .details .img {
      margin-top: 3%;
    }
    .ctn1 ul {
      flex-wrap: wrap;
      justify-content: flex-start;
    }
    .ctn1 ul li {
      width: 33.333%;
    }
    .ctn2 .concept .swiper-button-next,
    .ctn2 .concept .swiper-button-prev {
      width: 20px;
      height: 20px;
      --swiper-navigation-size: 10px;
      margin-top: -30px;
    }
    .ctn3 {
      flex-wrap: wrap;
    }
    .ctn3 .course_l,
    .ctn3 .course_r {
      width: 100%;
    }
 


    .ctn4 .w1600 .img,
    .ctn4 .w1600 .txt {
      width: 100%;
    }
    .ctn4 .w1600 .txt {
      margin-top: 3%;
    }
  }