.main-wrap {
  padding-top: 70px;
  padding-bottom: 60px;
}

.index-title {
  margin-bottom: 50px;
}

.containers {
  width: 100% !important;
  text-align: center;
  background: #FAFAFA;
}

.containers .index-title {
  margin-bottom: 50px;
}

.main-content video {
  width: 960px;
  height: 542px;
  background-color: #000;
  border-radius: 5px;
}

.main-content .select-wrap {
  margin-left: 20px;
  display: inline-block;
  vertical-align: top;
}

.main-content .select-wrap li {
  cursor: pointer;
}

.main-content .select-wrap li + li {
  margin-top: 35px;
}

.main-content .select-wrap img {
  height: 160px;
}

.main-content .videoMenu2 li + li {
  margin-top: 0;
}

.main-content .videoMenu2 img {
  height: 130px;
}

.teacher-show .index-title {
  margin-bottom: 40px !important;
}

.teacher-show > section {
  position: relative;
  width: 1200px;
  text-align: center;
  background: #FAFAFA;
  margin: auto;
}

.teacher-show > section .index-title {
  margin-bottom: 50px;
}

.teacher-show > section > i {
  position: absolute;
  width: 58px;
  font-size: 55px;
  color: #dedede;
  top: 40%;
  cursor: pointer;
  transition: color .2s linear;
}

.teacher-show > section > i:hover {
  color: #999;
}

.teacher-show > section > .icon-zuoqiehuanjiantou {
  left: -4%;
}

.teacher-show > section > .icon-youqiehuanjiantou {
  right: -4%;
}

.slider-wrap {
  width: 1140px;
  overflow: hidden;
  height: 305px;
  position: relative;
}

.slider-wrap .swiper-wrapper {
  margin-left: -20px;
}

.slider-wrap .swiper-slide {
  width: 150px !important;
  margin-left: 40px;
  box-sizing: border-box;
  height: auto !important;
}

.slider-wrap .swiper-slide > div {
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  position: relative;
  top: 10px;
  transition: top .2s linear;
}

.slider-wrap .swiper-slide > div > div:first-of-type {
  width: 150px !important;
  height: 148px;
  overflow: hidden;
  border-radius: 51%;
}

.slider-wrap .swiper-slide > div > div:first-of-type > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.slider-wrap .slider-text {
  height: 153px;
  box-sizing: border-box;
  position: relative;
  margin-top: 0;
  transition: margin-top .2s linear;
}

.slider-wrap .slider-text > p {
  font-size: 14px;
  color: #666;
  overflow: hidden;
  line-height: 24px;
  max-height: 72px;
}

.slider-wrap .slider-text .btn-style-nb {
  width: 150px;
  height: 40px;
  bottom: 20px;
  display: none;
  line-height: 40px;
  font-size: 18px;
  color: #FFFFFF !important;
  background: #00A0E9;
  border: 1px solid #00A0E9;
}

.slider-wrap .slider-title {
  text-align: center;
  font-weight: bold;
  font-size: 18px !important;
  color: #333333 !important;
  text-align: center;
  margin-bottom: 10px;
  margin-top: 20px;
}

.btn-box {
  text-align: center;
  margin-top: 40px;
}

.btn-box .btn-style-nb {
  position: static;
}

.stu-list {
  overflow: hidden;
  width: 100%;
  margin: auto;
  display: flex;
  justify-content: center;
}

.stu-list > li {
  float: left;
  width: 250px;
  text-align: center;
  cursor: pointer;
}

.stu-list > li + li {
  margin-left: 40px;
}

.stu-list > li img {
  width: 100%;
  border-radius: 100%;
}

.stu-list > li:hover img {
  box-shadow: 0 10px 20px 0 rgba(0, 0, 0, 0.1);
}

.stu-content {
  padding: 20px 20px 10px 20px;
  text-align: left;
  font-size: 14px;
  color: #666;
}

.stu-content p {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: normal;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

.stu-content .stu-title {
  text-align: center !important;
  color: #333;
  font-weight: bold;
  margin-bottom: 10px;
}

.self-education .index-title {
  margin-bottom: 36px;
}

.self-education .teaching-material {
  margin-bottom: 20px;
  text-align: center;
}

.self-education .teaching-material:last-of-type .stage > div p {
  width: 105px;
}

.self-education .teaching-material .stage-img {
  width: 578px;
  height: 286px;
  display: inline-block;
  margin-right: 61px;
}

.self-education .teaching-material .stage-img img {
  width: 100%;
  height: 100%;
}

.self-education .teaching-material .stage {
  display: inline-block;
  width: 330px;
  vertical-align: middle;
}

.self-education .teaching-material .stage > div {
  height: 34px;
  margin-bottom: 20px;
  text-align: left;
}

.self-education .teaching-material .stage > div > span {
  display: inline-block;
  width: 4px;
  height: 100%;
  opacity: 0.5;
  background: #00A0E9;
  border-radius: 2px;
  vertical-align: top;
}

.self-education .teaching-material .stage > div > span:nth-of-type(2) {
  opacity: 0.75;
}

.self-education .teaching-material .stage > div > span:nth-of-type(3) {
  opacity: 0.75;
}

.self-education .teaching-material .stage > div > p {
  width: 66px;
  display: inline-block;
  line-height: 34px;
  background: #00A0E9;
  border-radius: 2px;
  font-size: 18px;
  color: #FFFFFF;
  text-align: center;
}

.self-education .teaching-material .stage > p {
  text-align: left;
  font-size: 14px;
  color: #2A2A2A;
  line-height: 24px;
}

.self-education .teaching-material .stage > p > span {
  font-weight: bold;
}

.main-content {
  overflow: hidden;
  padding: 0 40px;
}

.main-content > .poster-big,
.main-content .poster-small {
  float: left;
}

.main-content > .poster-big > li,
.main-content .poster-small > li {
  border-radius: 5px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  background-size: cover;
  background-repeat: no-repeat;
  text-align: center;
  color: #fff;
}

.main-content > .poster-big > li:hover .poster-cover,
.main-content .poster-small > li:hover .poster-cover {
  background-color: rgba(0, 0, 0, 0.5);
}

.main-content > .poster-big > li:hover .poster-text,
.main-content .poster-small > li:hover .poster-text {
  opacity: 1;
}

.main-content > .poster-big .poster-text,
.main-content .poster-small .poster-text {
  position: absolute;
  left: 0;
  right: 0;
  margin: auto;
  opacity: 0;
  transition: all .2s linear;
}

.main-content > .poster-big .poster-title,
.main-content .poster-small .poster-title {
  font-size: 18px;
  font-weight: bold;
}

.main-content > .poster-big .btn-style-nb,
.main-content .poster-small .btn-style-nb {
  width: 165px;
  height: 44px;
  line-height: 44px;
  color: #fff;
  border-color: #fff;
  background: rgba(255, 255, 0, 0);
}

.main-content > .poster-big .btn-style-nb:hover,
.main-content .poster-small .btn-style-nb:hover {
  background: #00A0E9;
  box-shadow: none;
  border: 0px solid #FFFFFF;
}

.content-width {
  width: 1200px;
  margin: auto;
}

.poster-big {
  width: 50%;
  height: 420px;
}

.poster-big > li {
  height: 100%;
}

.poster-big .poster-text {
  top: 156px;
}

.poster-small {
  width: 23%;
  height: 420px;
  margin-left: 2%;
}

.poster-small > li {
  width: 100%;
  height: 195px;
}

.poster-small > li + li {
  margin-top: 30px;
}

.poster-small .poster-text {
  top: 40px;
}

.poster-cover {
  position: absolute;
  width: 100%;
  height: 100%;
  transition: all .2s linear;
}

.adjunction_1 {
  padding-top: 0 !important;
}

.adjunction_1 .education {
  background: #FFFFFF;
  box-shadow: 0 10px 30px 0 rgba(0, 0, 0, 0.1);
  text-align: center;
}

.adjunction_1 .education .education-wrap {
  display: inline-block;
  width: 280px;
  height: 142px;
  margin: 40px auto 50px;
  box-shadow: inset -1px 0 0 0 #DEDEDE;
}

.adjunction_1 .education .education-wrap:last-of-type {
  box-shadow: inset 0px 0 0 0 #DEDEDE;
}

.adjunction_1 .education .education-wrap:last-of-type img {
  height: 44px;
  width: 43px;
}

.adjunction_1 .education .education-wrap:first-of-type img {
  width: 58px;
}

.adjunction_1 .education .education-wrap:nth-of-type(2) img {
  width: 42px;
}

.adjunction_1 .education .education-wrap img {
  display: block;
  width: 45px;
  height: 40px;
  margin: 0 auto 20px;
}

.adjunction_1 .education .education-wrap p {
  font-size: 14px;
  color: #666666;
  letter-spacing: 0;
  text-align: center;
  line-height: 24px;
}

.adjunction_1 .education .education-wrap p:first-of-type {
  margin-bottom: 10px;
  font-size: 18px;
  color: #333333;
  text-align: center;
  font-weight: bold;
}

.adjunction_1 .education .education-wrap2 {
  width: 373px;
}

.adjunction_1 .education .education-wrap2 > img {
  height: 40px;
}

.adjunction_1 .education .education-wrap2:first-of-type > img {
  width: 49px;
}

.adjunction_1 .education .education-wrap2:last-of-type > img {
  width: 48px;
  height: 40px;
}

.adjunction_1 .education .education-wrap2:nth-of-type(2) img {
  width: 40px;
}

.adjunction_1 .mode {
  margin-top: 60px;
  text-align: center;
  background: #fff;
}

.adjunction_1 .mode .mode-wrap {
  display: inline-block;
  width: 350px;
  height: 331px;
  margin-right: 30px;
  background: #FFFFFF;
  border-radius: 11px;
  box-shadow: 0 10px 30px 0 rgba(0, 0, 0, 0.1);
}

.adjunction_1 .mode .mode-wrap:last-of-type {
  margin-right: 0px;
}

.adjunction_1 .mode .mode-wrap img {
  width: 350px;
  height: 200px;
  display: block;
  margin-bottom: 20px;
}

.adjunction_1 .mode .mode-wrap p {
  font-size: 14px;
  color: #666666;
  text-align: center;
  line-height: 24px;
}

.adjunction_1 .mode .mode-wrap p:first-of-type {
  margin-bottom: 5px;
  font-size: 18px;
  color: #333333;
  font-weight: bold;
}

.adjunction_1 .mode .mode-wrap span {
  display: block;
  width: 20px;
  height: 4px;
  margin: 0 auto 10px;
  background: #00A0E9;
  border-radius: 5px;
}

.adjunction_1 .mode > a {
  width: 220px;
  height: 60px;
  display: block;
  margin: 0 auto;
  margin-top: 30px;
  background: #FFEB00;
  border-radius: 30px;
  text-align: center;
  line-height: 60px;
  font-size: 18px;
  color: #333333;
  cursor: pointer;
}

.adjunction_1 .mode > a:hover {
  background: #FFEF33;
  box-shadow: 0 5px 10px 0 rgba(255, 235, 0, 0.5);
}

.stage-promotion {
  padding-bottom: 0px !important;
}

.stage-promotion .index-title {
  margin-bottom: 50px;
}

.stage-promotion .stage-promotion-wrap {
  text-align: center;
}

.stage-promotion .stage-promotion-wrap > img {
  width: 600px;
  height: 690px;
  margin-right: 40px;
  display: inline-block;
  vertical-align: top;
}

.stage-promotion .stage-promotion-wrap .stage-step {
  display: inline-block;
}

.stage-promotion .stage-promotion-wrap .stage-step > img {
  width: 120px;
  height: 670px;
  margin-right: 10px;
  display: inline-block;
  vertical-align: top;
}

.stage-promotion .stage-promotion-wrap .stage-step > div {
  display: inline-block;
  margin-top: 15px;
}

.stage-promotion .stage-promotion-wrap .stage-step > div p:nth-of-type(odd) {
  margin-bottom: 5px;
  font-size: 18px;
  color: #333333;
  font-weight: bold;
  text-align: left;
}

.stage-promotion .stage-promotion-wrap .stage-step > div p:nth-of-type(even) {
  width: 280px;
  height: 48px;
  margin-bottom: 33px;
  font-size: 14px;
  color: #666666;
  line-height: 24px;
  text-align: left;
}

.stage-promotion .stage-promotion-wrap .stage-step > div p:nth-of-type(8) {
  margin-bottom: 35px;
}

.stage-promotion .stage-promotion-wrap2 > img {
  height: 580px;
  margin-right: 0px;
  margin-left: 60px;
}

.stage-promotion .stage-promotion-wrap2 .stage-step2 > img {
  height: 574px;
}

.stage-promotion .stage-promotion-wrap2 .stage-step2 > div {
  margin-top: 10px;
}

.stage-promotion .stage-promotion-wrap2 .stage-step2 > div p:nth-of-type(even) {
  margin-bottom: 38px;
}

.stage-promotion .stage-promotion-wrap2 .stage-step2 > div p:nth-of-type(8) {
  margin-bottom: 35px;
}

.doubts {
  padding-bottom: 40px !important;
}

.doubts .index-title {
  margin-bottom: 50px;
}

.doubts .doubt-content {
  width: 1140px;
  margin: 0 auto;
  overflow: hidden;
}

.doubts .doubt-content .btn-button {
  height: 90px;
  text-align: center;
}

.doubts .doubt-content .btn-button .button-style_1 {
  width: 220px;
  height: 60px;
  border-radius: 30px;
  background: #00A0E9;
  font-size: 18px;
  color: #FFFFFF;
  text-align: center;
  cursor: pointer;
}

.doubts .doubt-content .btn-button .button-style_1:hover {
  background: #21B6FA;
  box-shadow: 0 5px 20px 0 rgba(0, 160, 233, 0.5);
  border-radius: 30px;
}

.doubts .doubt-content .doubt_1 {
  width: 1030px;
  margin-bottom: 40px;
}

.doubts .doubt-content .doubt_1:nth-of-type(2) {
  float: right;
}

.doubts .doubt-content .doubt_1:last-of-type .problem:first-of-type > div {
  height: 72px;
}

.doubts .doubt-content .doubt_1:last-of-type .problem:first-of-type > div > p {
  height: 48px;
  margin-top: 12px;
  line-height: 24px;
}

.doubts .doubt-content .problem {
  display: inline-block;
  width: 280px;
  margin-right: 70px;
}

.doubts .doubt-content .problem:last-of-type {
  margin-right: 0px;
}

.doubts .doubt-content .problem img {
  width: 60px;
  height: 60px;
  vertical-align: top;
}

.doubts .doubt-content .problem > div {
  display: inline-block;
  width: 180px;
  height: 48px;
  margin-left: 15px;
  background: #FFFFFF;
  box-shadow: 0 10px 30px 0 rgba(0, 0, 0, 0.1);
  border-radius: 10px 10px 10px 10px / 0px 1px 0px;
}

.doubts .doubt-content .problem > div > p {
  display: inline-block;
  height: 100%;
  margin-left: 20px;
  font-size: 14px;
  color: #666666;
  line-height: 48px;
  text-align: left;
}

.doubts .doubt-content .problem > div > p span {
  color: #151515;
  font-weight: bold;
}

#videos .index-title {
  margin-bottom: 30px;
}

#videos #video-select {
  display: inline-block;
  padding-left: 0;
}

#videos #video-select video {
  display: block;
  width: 540px;
  height: 305px;
  margin: 0 auto;
  background-color: #000;
  border-radius: 5px;
}

#videos #video-select .select-wrap {
  margin-left: 20px;
  margin-bottom: 20px;
  vertical-align: top;
}

#videos #video-select .select-wrap li {
  cursor: pointer;
  display: inline-block;
  margin-right: 13px;
}

#videos #video-select .select-wrap li + li {
  margin-top: 35px;
}

#videos #video-select .select-wrap img {
  width: 100px;
  height: 95px;
}

#videos #video-select .videoMenu2 li + li {
  margin-top: 0;
}

#videos #video-select .button {
  width: 120px;
  height: 26px;
  margin: 20px auto 0;
  border: 1px solid #00A0E9;
  border-radius: 30px;
  line-height: 26px;
}

#videos #video-select .button p {
  font-size: 12px;
  color: #00A0E9;
}

#exclusive-textbook .containers {
  width: 1200px !important;
  margin-left: auto;
  margin-right: auto;
  background: #fff;
}

.course-lineOne > img {
  width: 45%;
  margin-top: 30px;
}

.course-lineOne > div {
  margin-left: 52px;
}

.course-lineTwo {
  margin-top: 80px;
}

.course-lineTwo > img {
  width: 43%;
}

.course-lineTwo > div {
  margin-top: 53px;
  margin-right: 106px;
}

.course-lineOne,
.course-lineTwo {
  padding: 0 40px;
  overflow: hidden;
}

.course-lineOne > img,
.course-lineTwo > img {
  float: left;
}

.course-lineOne > div,
.course-lineTwo > div {
  float: left;
}

.course-text {
  width: 45%;
}

.course-text > hr {
  width: 110px;
  height: 5px;
  background-color: #00a0e9;
  border-radius: 19px;
  border: none;
  margin-bottom: 20px;
}

.course-text p {
  color: #666;
  font-size: 14px;
  text-indent: 25px;
  line-height: 25px;
  text-align: left;
}

.course-text p span {
  font-weight: bold;
  color: #151515;
}

.course-text .info-underline {
  color: #151515;
  font-weight: bold;
}

.course-text .info-text {
  margin-top: 35px;
}

.info-title {
  color: #333 !important;
  font-size: 24px !important;
  margin-bottom: 20px;
  font-weight: bold;
  text-indent: 0 !important;
  text-align: left;
}