html,
body {
  width: 100%;
  background: #f0f1f5;
  font-size: calc(10/1920*100vw);
}
.course {
  width: 100%;
  background: #f0f1f5;
  margin-top: 10rem;
}
.course .course-width {
  width: 140rem;
  height: auto;
  overflow: hidden;
  margin: 0 auto;
}
.course .course-width .common {
  height: 4.6rem;
  line-height: 4.6rem;
  font-size: 1.6rem;
  font-weight: 400;
}
.course .course-width .common a {
  cursor: pointer;
  color: #777c84;
}
.course .course-width .common span {
  cursor: pointer;
  color: #777c84;
}
.course .course-width .common .dot {
  margin: 0 0.5rem;
}
.course .course-width .content {
  padding: 3.2rem;
  background: #fff;
  border-radius: 1.6rem;
}
.course .course-width .content .top {
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
}
.course .course-width .content .top .left {
  width: 94.7rem;
}
.course .course-width .content .top .left .title {
  margin-bottom: 1.4rem;
}
.course .course-width .content .top .left .title .titles {
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  overflow: hidden;
  -webkit-box-orient: vertical;
  max-width: 100%;
  font-size: 3.2rem;
  font-weight: 500;
  color: #191919;
}
.course .course-width .technical {
  height: 2.2rem;
  line-height: 2.2rem;
  font-size: 1.6rem;
  color: #777c84;
}
.course .course-width .content .top .right {
  width: 38.9rem;
  display: flex;
}
.course .course-width .content .top .right .headers {
  margin-right: 1.6rem;
}
.course .course-width .content .top .right .headers .header-avaror {
  width: 6.6rem;
  height: 6.6rem;
  background-color: #53b77f;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  font-size: 4.2rem;
}
.course .course-width .content .top .right .mes {
  padding-top: 1rem;
}
.course .course-width .content .top .right .mes .name {
  font-size: 1.8rem;
  font-weight: bold;
  color: #191919;
}
.course .course-width .content .top .right .mes .from {
  width: 100%;
  margin: 0.5rem 0 0.8rem 0;
  font-size: 1.4rem;
  color: #777c84;
  white-space: nowrap;
  text-overflow: ellipsis;
  overflow: hidden;
}
.course .course-width .content .top .right .use-btn {
  width: 14rem;
  height: 3rem;
  line-height: 3rem;
  text-align: center;
  display: block;
  cursor: pointer;
  border-radius: 0.4rem;
  border: 0.1rem solid #53b77f;
  color: #53b77f;
  font-size: 1.2rem;
}
.course .course-width .video {
  display: flex;
  justify-content: space-between;
}
.course .course-width .video .videoBox {
  width: 94.7rem;
  height: 52.3rem;
  overflow: hidden;
  border-radius: 0.8rem;
  position: relative;
}
.course .course-width .video .videoBox .videoLayer {
  position: absolute;
  top: 0;
  left: 0;
  bottom: 12%;
  right: 0;
  background: rgba(0, 0, 0, 0.01);
  display: none;
}
.course .course-width .video .videoBox .videoLayer span {
  width: 4.8rem;
  height: 4.8rem;
  background: rgba(0, 0, 0, 0.5) url(../images/pause.png) no-repeat center center;
  border-radius: 50%;
  cursor: pointer;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.course .course-width .video .videoBox .videoLayer span.play {
  background: rgba(0, 0, 0, 0.5) url(../images/play.png) no-repeat center center;
}
.course .course-width .video .videoBox .videoLayer span.pause {
  background: rgba(0, 0, 0, 0.5) url(../images/pause.png) no-repeat center center;
}
.course .course-width .video .videoBox img {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  filter: blur(3rem);
  opacity: 0.8;
}
.course .course-width .video .videoBox video {
  width: 100%;
  height: 100%;
  /* object-fit: cover; */
  outline: none;
  position: absolute;
  z-index: 1;
}
.course .course-width .video .videoMenu {
  width: 36.9rem;
  height: 52.3rem;
  background: #f6f7f8;
  border-radius: 0.8rem 0.8rem 0 0;
}
.course .course-width .video .videoMenu .videoTitle {
  padding-left: 2.2rem;
  height: 5.8rem;
  line-height: 5.8rem;
  background: #53b77f;
  color: #fff;
  font-size: 1.8rem;
  border-radius: 0.8rem 0.8rem 0 0;
}
.course .course-width .video .videoMenu .videoMenuList {
  background: #f6f7f8;
  padding: 0rem 2.4rem;
  max-height: 46rem;
  overflow: auto;
}
.course .course-width .video .videoMenu .videoMenuList::-webkit-scrollbar {
  width: 0.4rem;
  height: 1rem;
}

.course .course-width .video .videoMenu .videoMenuList::-webkit-scrollbar-corner {
  background: #f6f7f8;
}

.course .course-width .video .videoMenu .videoMenuList::-webkit-scrollbar-thumb {
  background: rgb(193, 193, 193);
  border-radius: 0.6rem;
}

.course .course-width .video .videoMenu .videoMenuList::-webkit-scrollbar-track {
  background: none;
  border-radius: 0.2rem;
}
.course .course-width .video .videoMenu .videoMenuList .item {
  margin: 2rem 0;
  font-size: 1.4rem;
  font-weight: 400;
  display: flex;
  color: #767676;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
}
.course .course-width .video .videoMenu .videoMenuList .item a {
  color: #767676;
}
.course .course-width .video .videoMenu .videoMenuList .item.active a {
  color: #53b77f;
}
.course .course-width .video .videoMenu .videoMenuList .item .div1 {
  display: flex;
}
.course .course-width .video .videoMenu .videoMenuList .item .div1 .span1 {
  margin-right: 1.6rem;
}
.course .course-width .video .videoMenu .videoMenuList .item .div1 .span2 {
  width: 24rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.course .course-width .video .videoMenu .videoMenuList .isActives {
  color: #53b77f;
}
.course .course-width .introduction {
  width: 140rem;
  height: auto;
  overflow: hidden;
  display: flex;
  justify-content: space-between;
  margin: 2rem auto;
}
.course .course-width .description {
  width: 45.2rem;
  height: 39rem;
  padding: 2.5rem 3rem 6.2rem 3rem;
  box-sizing: border-box;
  background: #fff;
  border-radius: 1.6rem;
}
.course .course-width .description .desc {
  max-height: 15rem;
  font-size: 1.6rem;
  color: #777c84;
  margin-top: 3.4rem;
  margin-bottom: 3.2rem;
  overflow-y: auto;
}
.course .course-width .description .desc::-webkit-scrollbar {
  width: 0.4rem;
  height: 1rem;
}
.course .course-width .description .desc::-webkit-scrollbar-corner {
  background: #f6f7f8;
}
.course .course-width .description .desc::-webkit-scrollbar-thumb {
  background: rgb(193, 193, 193);
  border-radius: 0.6rem;
}
.course .course-width .description .desc::-webkit-scrollbar-track {
  background: none;
  border-radius: 0.2rem;
}
.course .course-width .description button {
  width: 16rem;
  height: 4.8rem;
  line-height: 4.8rem;
  border-radius: 2.4rem;
  font-size: 1.6rem;
  cursor: pointer;
  background: #53b77f;
  border: 0.1rem solid #53b77f;
  text-align: center;
  box-sizing: border-box;
  color: #fff;
}
.course .course-width .description button.on {
  background: rgb(247, 249, 249);
  border: 0.1rem solid rgb(240, 240, 241);
  color: rgb(119, 124, 132);
}
.course .course-width .recommended {
  width: 92.8rem;
  height: 39rem;
  background: #fff;
  padding: 2.5rem 3rem 6.2rem 3rem;
  box-sizing: border-box;
  border-radius: 1.6rem;
  overflow: hidden;
}
.course .course-width .recommended .title {
  /* margin-bottom: 3.2rem; */
  display: flex;
  flex-flow: row nowrap;
  align-items: center;
  justify-content: space-between;
}
.course .course-width .recommended .tjList .item {
  width: 40.4rem;
  height: 7.2rem;
  cursor: pointer;
  margin-bottom: 2.4rem;
  margin-right: 4.5rem;
  float: left;
}
.course .course-width .recommended .tjList .item:nth-child(2n) {
  margin-right: 0;
}
.course .course-width .recommended .tjList .item a {
  display: flex;
  justify-content: space-between;
}
.course .course-width .recommended .tjList .item .tj-img {
  width: 13rem;
  height: 7.2rem;
  border-radius: 0.8rem;
  position: relative;
}
.course .course-width .recommended .tjList .item img {
  width: 13rem;
  height: 7.2rem;
  border-radius: 0.8rem;
  object-fit: cover;
}
.tj-img .news-layer {
  position: absolute;
  inset: 0rem;
  background: rgba(0, 0, 0, 0.1);
}
.tj-img .body-play {
  width: 3rem;
  height: 3rem;
  background: url(../images/smallPlay.png) center center no-repeat rgba(0, 0, 0, 0.5);
  border-radius: 50%;
  cursor: pointer;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.course .course-width .recommended .tjList .item .divs {
  width: 25.8rem;
  height: 7.2rem;
}
.course .course-width .recommended .tjList .item .div1 {
  width: 100%;
  height: 2.4rem;
  line-height: 2.4rem;
  margin-bottom: 0.8rem;
  font-size: 1.6rem;
  font-weight: bold;
  color: #191f26;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  overflow: hidden;
  -webkit-box-orient: vertical;
}
.course .course-width .recommended .tjList .item .div2 {
  width: 100%;
  height: 2.2rem;
  line-height: 2.2rem;
  font-size: 1.4rem;
  color: #777c84;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  overflow: hidden;
  -webkit-box-orient: vertical;
}
@media (max-width: 768px) {
  html,
  body {
    font-size: calc(10/750*100vw);
  }
  .mobile {
    display: block;
  }
  .course {
    width: 100%;
    padding: 0 3.2rem;
    box-sizing: border-box;
    margin-top: 3.2rem;
  }
  .course .course-width {
    width: 100%;
  }
  .course .course-width .common {
    display: none;
  }
  body[data-lang="EN"] .course .course-width .common.en {
    display: none !important;
  }
  .course .course-width .content .top {
    display: block;
  }
  .course .course-width .content .top .left {
    width: 100%;
    margin-bottom: 3.2rem;
  }
  .course .course-width .content .top .left .title .titles {
    font-size: 4rem;
  }
  .course .course-width .technical {
    height: 3.2rem;
    line-height: 150%;
    font-size: 2.4rem;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    overflow: hidden;
    -webkit-box-orient: vertical;
  }
  body[data-lang="EN"] .course .course-width .technical.en {
    display: -webkit-box !important;
    line-height: 3.2rem;
  }
  .course .course-width .content {
    border-radius: 2.4rem;
  }
  .course .course-width .video {
    display: block;
  }
  .course .course-width .headers-con {
    width: 100%;
    height: 22rem;
    background: #fff;
    border-radius: 2.4rem;
    padding: 3.2rem;
    box-sizing: border-box;
    display: flex;
    margin-top: 3.2rem;
  }
  .course .course-width .headers-con .headers {
    width: 8rem;
    height: 8rem;
    border-radius: 4rem;
    background: #53b77f;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #fff;
    font-size: 5rem;
    margin-right: 2.4rem;
  }
  body[data-lang="EN"] .course .course-width .headers-con .headers.en {
    display: flex !important;
  }
  .course .course-width .headers-con .mes .name {
    color: #191919;
    font-size: 2.8rem;
    height: 4rem;
    line-height: 4rem;
    font-weight: bold;
  }
  .course .course-width .headers-con .mes .from {
    width: 48rem;
    height: 3.2rem;
    line-height: 3.2rem;
    font-size: 2.4rem;
    color: #777c84;
    white-space: nowrap;
    text-overflow: ellipsis;
    overflow: hidden;
    margin-bottom: 2rem;
    margin-top: 0.4rem;
  }
  .course .course-width .headers-con .mes .use-btn {
    width: 28rem;
    height: 6rem;
    line-height: 6rem;
    text-align: center;
    display: block;
    cursor: pointer;
    border-radius: 0.8rem;
    border: 0.2rem solid #53b77f;
    color: #53b77f;
    font-size: 2.1rem;
  }
  body[data-lang="EN"] .course .course-width .headers-con .mes .use-btn {
    width: 100%;
  }
  .course .course-width .video .videoBox {
    width: 100%;
    height: 34.2rem;
  }
  .course .course-width .introduction {
    width: 100%;
    display: block;
  }
  .course .course-width .introduction .courseIntroduction {
    width: 100%;
    height: auto;
    background: #fff;
    padding: 1rem 3.2rem 4.8rem;
    box-sizing: border-box;
    border-radius: 2.4rem;
  }
  .course .course-width .courseIntroduction .courseTitle {
    width: auto;
    height: 6.4rem;
    line-height: 6.4rem;
    font-size: 2.8rem;
    color: #191919;
    border-bottom: 0.2rem solid #f0f1f5;
    overflow-x: scroll;
    overflow-y: hidden;
    display: -webkit-box;
    white-space: nowrap;
  }
  .course .course-width .courseIntroduction .courseTitle::-webkit-scrollbar {
    width: 0.1rem;
    height: 0.1rem;
  }

  .course .course-width .courseIntroduction .courseTitle::-webkit-scrollbar-corner {
    background: #53b77f;
  }

  .course .course-width .courseIntroduction .courseTitle::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.4);
    border-radius: 0.1rem;
  }
  .course .course-width .courseIntroduction .courseTitle .title {
    display: inline-block;
    margin-right: 4.8rem;
  }
  .course .course-width .courseIntroduction .courseTitle .title.on {
    color: #53b77f;
    font-weight: bold;
    border-bottom: 0.4rem solid #53b77f;
  }
  .course .course-width .courseIntroduction .courseTitle .title:last-child {
    margin-right: 0;
  }
  .course .course-width .courseIntroduction .courseCon {
    margin: 3.2rem 0;
  }
  .course .course-width .courseIntroduction .courseCon .desc {
    width: 100%;
    height: 28rem;
    overflow-y: auto;
    font-size: 2.8rem;
    color: #777c84;
    line-height: 200%;
    text-align: justify;
  }
  .course .courseIntroduction .courseCon .desc::-webkit-scrollbar {
    width: 0.4rem;
    height: 1rem;
  }
  .course .courseIntroduction .courseCon .desc::-webkit-scrollbar-corner {
    background: #f6f7f8;
  }
  .course .courseIntroduction .courseCon .desc::-webkit-scrollbar-thumb {
    background: rgb(193, 193, 193);
    border-radius: 0.6rem;
  }
  .course .courseIntroduction .courseCon .desc::-webkit-scrollbar-track {
    background: none;
    border-radius: 0.2rem;
  }
  .course .courseIntroduction .courseCon button {
    width: 26.8rem;
    height: 8rem;
    line-height: 8rem;
    display: block;
    border-radius: 4rem;
    font-size: 2.8rem;
    cursor: pointer;
    background: #53b77f;
    text-align: center;
    box-sizing: border-box;
    color: #fff;
    margin: 0 auto;
  }
  .course .courseIntroduction .videoMenu .videoMenuList {
    width: 100%;
    height: 50rem;
    overflow-y: auto;
    padding-right: 1rem;
    box-sizing: border-box;
  }
  .course .courseIntroduction .videoMenu .videoMenuList::-webkit-scrollbar {
    width: 0.4rem;
    height: 1rem;
  }

  .course .courseIntroduction .videoMenu .videoMenuList::-webkit-scrollbar-corner {
    background: #f6f7f8;
  }

  .course .courseIntroduction .videoMenu .videoMenuList::-webkit-scrollbar-thumb {
    background: rgb(193, 193, 193);
    border-radius: 0.6rem;
  }

  .course .courseIntroduction .videoMenu .videoMenuList::-webkit-scrollbar-track {
    background: none;
    border-radius: 0.2rem;
  }
  .course .courseIntroduction .videoMenu .videoMenuList .item {
    width: 100%;
    height: 10rem;
    line-height: 10rem;
    border-bottom: 0.2rem solid #f0f1f5;
    font-size: 2.8rem;
    font-weight: 400;
    display: flex;
    color: #767676;
    flex-flow: row nowrap;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
  }
  .course .courseIntroduction .videoMenu .videoMenuList .item a {
    color: #767676;
  }
  .course .courseIntroduction .videoMenu .videoMenuList .item .div1 {
    display: flex;
  }
  .course .courseIntroduction .videoMenu .videoMenuList .item .div1 .span1 {
    margin-right: 2.4rem;
  }
  .course .courseIntroduction .videoMenu .videoMenuList .item .div1 .span2 {
    width: 40.8rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .course .course-width .introduction .courseCon .videoMenu {
    display: none;
  }
  .course .course-width .description {
    width: 100%;
    height: 56.8rem;
    margin-bottom: 3.2rem;
  }
  .course .course-width .recommended {
    width: 100%;
    height: auto;
    padding: 4.8rem 3.2rem;
    margin-top: 3.2rem;
  }
  .course .course-width .recommended .title {
    margin-bottom: 4rem;
  }
  .course .course-width .recommended .title .publicSmallTitle {
    font-size: 5.2rem;
    padding-left: 3.2rem;
  }
  .course .course-width .recommended .title .publicSmallTitle:after {
    width: 0.8rem;
    height: 6rem;
    left: 0.8rem;
  }
  .course .course-width .recommended .title .publicSmallTitle:before {
    width: 0.2rem;
    height: 6rem;
  }
  .course .course-width .recommended .tjList .item {
    width: 100%;
    height: 11rem;
  }
  .course .course-width .recommended .tjList .item .tj-img {
    width: 20rem;
    height: 11rem;
    border-radius: 1.6rem;
  }
  .course .course-width .recommended .tjList .item img {
    width: 20rem;
    height: 11rem;
  }
  .course .course-width .recommended .tjList .item .divs {
    width: 40.4rem;
    margin-left: 1.5rem;
  }
  .course .course-width .recommended .tjList .item .div1 {
    font-size: 3.2rem;
    height: 7.4rem;
    line-height: 120%;
    -webkit-line-clamp: 2;
    margin-bottom: 0.8rem;
  }
  .course .course-width .recommended .tjList .item .div2 {
    font-size: 2.8rem;
    height: 2.8rem;
    line-height: 100%;
  }
}