.course-crumb {
  padding: 25px 0;
  line-height: 24px;
  font-size: 14px;
  color: #999999;
}

.course-crumb a {
  color: #999999;
}

.course-crumb a:hover {
  color: #4860D3;
}

.course-left {
  width: 835px;
  float: left;
}

.course-right {
  width: 325px;
  float: right;
}

.course-left-top {
  height: 217px;
}

.course-detail-pic {
  width: 350px;
  height: 217px;
  float: left;
}
.course-detail-pic img {
  display: block;
  width: 350px;
  height: 217px;
}

.course-detail-info {
  float: left;
  width: 300px;
  margin-left: 20px;
}
.course-detail-info h5 {
  font-size: 24px;
  font-weight: bold;
  line-height: 30px;
  padding-top: 15px;
}
.course-detail-info .tags {
  font-size: 0;
  margin-top: 15px;
  height: 20px;
  overflow: hidden;
}
.course-detail-info .tags span {
  display: inline-block;
  font-size: 12px;
  color: #8C9BB9;
  padding: 0 8px;
  background: #F1F3F6;
  margin-right: 10px;
  height: 20px;
  line-height: 20px;
}
.course-detail-info .course-detail-price {
  padding-top: 40px;
  font-size: 14px;
  color: #FF4F51;
  line-height: 24px;
}
.course-detail-info .course-detail-price span {
  font-size: 18px;
  font-weight: bold;
}
.course-detail-info section {
  font-size: 12px;
  color: #999999;
  line-height: 20px;
  margin-top: 30px;
}
.course-detail-info section span {
  margin-left: 24px;
}

.course-detail-code {
  width: 156px;
  float: right;
  padding-top: 98px;
}
.course-detail-code .course_code {
  margin: auto;
  margin-bottom: 10px;
  display: block;
}
.course-detail-code p {
  text-align: center;
  font-size: 14px;
  color: #B2B2B2;
  line-height: 20px;
}

.course-syllabus {
  margin-top: 45px;
}

.course-title {
  font-size: 20px;
  font-weight: bold;
  line-height: 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.course-title .icon-sort {
  display: block;
  width: 24px;
  height: 18px;
  background: url(../images/icon_sort.png);
  cursor: pointer;
}

.course-introduce {
  margin-top: 50px;
}
.course-introduce .introduce-item {
  padding: 30px 0 50px;
}
.course-introduce .introduce-item .introduce-title {
  width: 138px;
  height: 27px;
  margin: 0 auto;
  background: url(../images/course/course_title.png);
  text-align: center;
  font-size: 20px;
  color: #4860D3;
  line-height: 27px;
  font-weight: bold;
}
.course-introduce .introduce-item .introduce-content {
  font-size: 16px;
  line-height: 36px;
  padding-top: 30px;
}

.course-cnxh .course-title a {
  float: right;
  font-size: 14px;
  color: #666;
  font-weight: normal;
}
.course-cnxh .course-title a:hover {
  color: #4860D3;
}
.course-cnxh .course-cnxh-list {
  margin-top: 25px;
}
.course-cnxh .course-cnxh-list li {
  width: 266px;
  float: left;
  margin-right: 18px;
}
.course-cnxh .course-cnxh-list li:nth-child(3n) {
  margin-right: 0;
}

.course-right-title {
  font-size: 20px;
  height: 24px;
  display: flex;
  align-items: center;
}
.course-right-title i {
  display: block;
  width: 4px;
  height: 16px;
  background: #4860D3;
  margin-right: 10px;
}

.lecturer-info {
  margin-top: 30px;
}
.lecturer-info section {
  padding-left: 110px;
  height: 90px;
}
.lecturer-info section img {
  display: block;
  width: 90px;
  height: 90px;
  margin-left: -110px;
  float: left;
  border-radius: 50%;
}
.lecturer-info section h5 {
  font-size: 18px;
  line-height: 24px;
}
.lecturer-info section p {
  font-size: 14px;
  line-height: 24px;
  color: #000;
  margin-top: 10px;
}
.lecturer-info article {
  font-size: 14px;
  color: #666666;
  line-height: 24px;
  padding-top: 15px;
}

.course-right-pic {
  padding: 35px 0;
}
.course-right-pic img {
  display: block;
}

.hot-course {
  padding-top: 30px;
}
.hot-course .course-cnxh-item {
  margin-bottom: 15px;
}
.hot-course .course-cnxh-item .cnxh-pic {
  width: 326px;
  height: 202px;
  position: relative;
}
.hot-course .course-cnxh-item .cnxh-pic img {
  display: block;
  width: 326px;
  height: 202px;
}

.course-no-01, .course-no-02, .course-no-03 {
  position: absolute;
  width: 47px;
  height: 52px;
  top: 0;
  left: 15px;
}

.course-no-01 {
  background: url(../images/course/course_number_1.png);
}

.course-no-02 {
  background: url(../images/course/course_number_2.png);
}

.course-no-03 {
  background: url(../images/course/course_number_3.png);
}

.course-no {
  position: absolute;
  top: 0;
  left: 0;
  width: 28px;
  height: 28px;
  background: rgba(0, 0, 0, 0.6);
  font-size: 16px;
  color: #fff;
  text-align: center;
  line-height: 28px;
}

.wrapper {
  width: 640px;
  margin: 60px auto;
}

.button-group {
  text-align: center;
}

.button-group button {
  display: inline-block;
  height: 36px;
  line-height: 20px;
  padding: 8px 16px;
  min-width: 100px;
  text-align: center;
  border: 1px solid #ccc;
  cursor: pointer;
  font: inherit;
}

.button-group button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.gitbtns {
  margin: 20px;
  text-align: center;
}

.gitbtns iframe {
  display: inline;
  width: auto;
  max-width: 120px;
}

#smusic {
  padding-top: 10px;
}

.smusic-container {
  width: 500px;
}

.smusic-container > .smusic-main > .smusic-panel {
  width: 100%;
}

.smusic-container > .smusic-aside > .smusic-ctrl.smusic-ctrl--left {
  width: 40px;
}

.smusic-container > .smusic-aside > .smusic-ctrl.smusic-ctrl--right {
  width: 75px;
}

.musicLawer {
  position: fixed;
  z-index: 100000;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
}

.musicLawer-bg {
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  position: absolute;
  background-color: rgba(35, 46, 76, 0.6);
}

.musicLawer-content {
  position: absolute;
  padding: 28px 30px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  min-width: 400px;
  min-height: 160px;
  background-color: #fff;
  box-shadow: 0 10px 20px 0 rgba(0, 0, 0, 0.05);
}

.closeBtn {
  position: absolute;
  right: 29px;
  top: 32px;
  display: inline-block;
  font-size: 18px;
  cursor: pointer;
  z-index: 9;
}