@charset "UTF-8";
/* 定义flex布局 */
/* 定义flex布局 是横向还是纵向布局 */
/*定义flex 超出换行*/
.course-title {
  width: var(--n);
}
.course-title .course-title-center {
  width: 1200px;
  height: 53px;
  background-color: #f5f5f5;
  margin: 0 auto;
  font-size: 15px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.course-title .course-title-center .course-title-center-text {
  margin-left: 20px;
}

.course {
  width: var(--n);
}
.course .course-center {
  width: 1200px;
  margin: 0 auto;
  padding-bottom: 25px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
}
.course .course-center .course-center-lists {
  width: 180px;
  height: 226px;
  background-color: #fff;
  --n: 6;
  --gap: calc((1200px - 180px * var(--n)) / var(--n) / 2);
  margin: 0 var(--gap);
  margin-top: 20px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
      -ms-flex-direction: column;
          flex-direction: column;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
}
.course .course-center .course-center-lists:nth-child(6n+1) {
  margin-left: 0;
}
.course .course-center .course-center-lists:nth-child(6n+6) {
  margin-right: 0;
}
.course .course-center .course-center-lists:hover {
  background-color: #00a09f;
}
.course .course-center .course-center-lists:hover .course-center-lists-title {
  color: #fff;
}
.course .course-center .course-center-lists:hover .course-center-lists-text {
  width: 120px;
  height: 32px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  background-color: #fff;
  border-radius: 50px;
  color: #00a09f;
}
.course .course-center .course-center-lists .course-center-lists-image {
  width: 80px;
  height: 80px;
}
.course .course-center .course-center-lists .course-center-lists-title {
  margin-top: 30px;
  font-size: 16px;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
}
.course .course-center .course-center-lists .course-center-lists-text {
  margin-top: 25px;
  font-size: 14px;
  color: #00a09f;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
}

.free {
  width: var(--n);
}
.free .free-center {
  width: 1200px;
  padding-top: 60px;
  padding-bottom: 20px;
  margin: 0 auto;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.free .free-center .free-center-left {
  width: 200px;
}
.free .free-center .free-center-left .free-center-left-title {
  font-size: 24px;
}
.free .free-center .free-center-left .free-center-left-text {
  margin-top: 60px;
  font-size: 18px;
}
.free .free-center .free-center-left .free-center-left-text .free-center-left-text-name {
  margin-bottom: 46px;
}
.free .free-center .free-center-left .free-center-left-text .free-center-left-text-color {
  color: #00a09f;
}
.free .free-center .free-center-right {
  margin-left: 25px;
  width: 975px;
  height: 825px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  -ms-flex-line-pack: start;
      align-content: flex-start;
}
.free .free-center .free-center-right .free-center-right-lists {
  width: 310px;
  height: 250px;
  background-color: #fff;
  -webkit-box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
          box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
  border-radius: 10px;
  --n: 3;
  --gap: calc((975px - 303px * var(--n)) / var(--n) / 2);
  margin: 0 var(--gap);
  margin-bottom: 20px;
}
.free .free-center .free-center-right .free-center-right-lists:nth-child(3n+1) {
  margin-left: 0;
}
.free .free-center .free-center-right .free-center-right-lists:nth-child(3n+3) {
  margin-right: 0;
}
.free .free-center .free-center-right .free-center-right-lists .free-center-right-lists-image {
  width: 310px;
  height: 175px;
  border-radius: 10px 10px 0 0;
}
.free .free-center .free-center-right .free-center-right-lists .free-center-right-lists-title {
  padding: 10px 15px;
}
.free .free-center .free-center-right .free-center-right-lists .free-center-right-lists-title .free-center-right-lists-title-text {
  font-size: 16px;
}
.free .free-center .free-center-right .free-center-right-lists .free-center-right-lists-title .free-center-right-lists-title-bottom {
  margin-top: 10px;
  font-size: 14px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
}
.free .free-center .free-center-right .free-center-right-lists .free-center-right-lists-title .free-center-right-lists-title-bottom .free-center-right-lists-title-bottom-title {
  overflow: hidden; /*隐藏多出部分文字*/
  text-overflow: ellipsis; /*用省略号代替多出部分文字*/
  display: -webkit-box; /* 显示多行文本容器 */
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 1; /*显示行数*/
}
.free .free-center .free-center-right .free-center-right-lists .free-center-right-lists-title .free-center-right-lists-title-bottom .free-center-right-lists-title-bottom-image {
  width: 20px;
  height: 19px;
  margin-right: 5px;
}
.free .free-center .free-center-right .free-center-right-lists .free-center-right-lists-title .free-center-right-lists-title-bottom .free-center-right-lists-title-bottom-right-image {
  width: 19px;
  height: 15px;
  margin-left: 15px;
  margin-right: 5px;
}

.video {
  width: var(--n);
  margin-top: 60px;
  padding-bottom: 60px;
}
.video .video-left {
  width: 1200px;
  margin: 0 auto;
}
.video .video-lef-video {
  background-color: #000;
}

.video-title {
  width: var(--n);
}
.video-title .video-title-center {
  width: 1200px;
  margin: 0 auto;
}
.video-title .video-title-center .video-title-center-text {
  width: 1200px;
  border-bottom: 1px solid #eeeeee;
}
.video-title .video-title-center .video-title-center-text .video-title-center-text-title {
  font-size: 24px;
  font-weight: bold;
}
.video-title .video-title-center .video-title-center-text .video-title-center-text-text {
  margin-top: 40px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  font-size: 14px;
}
.video-title .video-title-center .video-title-center-text .video-title-center-text-text .video-title-center-text-text-name {
  width: 33.33%;
  margin-bottom: 25px;
}
.video-title .video-title-center .video-conten {
  margin-top: 30px;
  padding-bottom: 50px;
}
.video-title .video-title-center .video-conten .video-conten-title {
  font-size: 16px;
}
.video-title .video-title-center .video-conten .video-conten-text {
  margin-top: 15px;
  font-size: 14px;
}

.subject {
  width: var(--n);
}
.subject .subject-center {
  margin: 50px auto;
  width: 1200px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.subject .subject-center .subject-center-lists {
  width: 150px;
  height: 50px;
  background-color: #FFF;
  border: 1px solid #00a09f;
  color: #00a09f;
  border-radius: 5px;
  font-size: 16px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
  margin-left: 10px;
}
.subject .subject-center .subject-center-lists:hover {
  background-color: #00a09f;
  color: #FFF;
}
.subject .subject-center .subject-center-lists-color {
  background-color: #00a09f !important;
  color: #FFF !important;
}