.course_index .course-warp {
  margin: 0 auto 15px;
}
.course_index .filter-box {
  margin: 0 auto;
}
.course_index .filter-box .item_filter {
  overflow: hidden;
  line-height: 45px;
  height: 45px;
  background-color: #fff;
  display: flex;
  margin-bottom: 2px;
}
.course_index .filter-box .item_filter.autoheight {
  height: auto;
}
.course_index .filter-box .item_filter .title {
  background-color: #fafafa;
  font-size: 14px;
  text-align: left;
  width: 108px;
  padding-left: 12px;
  line-height: 45px;
}
.course_index .filter-box .item_filter .items {
  flex: 1;
  overflow: hidden;
}
.course_index .filter-box .item_filter .items li {
  display: inline-block;
  line-height: 45px;
  font-size: 12px;
  float: left;
  width: 101px;
  text-align: center;
}
.course_index .filter-box .item_filter .items li a {
  color: #666666;
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0px 10px;
}
.course_index .filter-box .item_filter .items li a:hover {
  background: #f3f3f3;
}
.course_index .filter-box .item_filter .items li a.on {
  color: #ff6700;
}
.course_index .filter-box .item_filter .more {
  line-height: 45px;
  font-size: 12px;
  width: 50px;
  display: none;
}
.course_index .filter-box .item_filter .more a {
  color: #999999;
}
.course_index .goods-sort {
  margin-top: 10px;
  height: 47px;
  line-height: 47px;
}
.course_index .goods-sort .goods-sort-left {
  float: left;
  height: 25px;
  margin-left: 12px;
  overflow: hidden;
  margin-top: 10px;
}
.course_index .goods-sort .goods-sort-left a {
  display: inline-block;
  width: 80px;
  height: 25px;
  line-height: 25px;
  text-align: center;
  background-size: 9px 12px;
  background-repeat: no-repeat;
  background-position: 43px 5px;
  float: left;
  position: relative;
}
.course_index .goods-sort .goods-sort-left a:hover {
  color: #ff6700;
}
.course_index .goods-sort .goods-sort-left a:hover i {
  color: #ff6700;
}
.course_index .goods-sort .goods-sort-left a + a:before {
  content: '';
  display: block;
  width: 1px;
  height: 18px;
  border-left: 1px solid #ddd;
  left: 0;
  top: 50%;
  margin-top: -9px;
  position: absolute;
}
.course_index .goods-sort .goods-sort-left a i {
  position: absolute;
  right: 10px;
  top: 0px;
  display: block;
}
.course_index .goods-sort .goods-sort-right {
  float: right;
}
.course_index .goods-sort .goods-sort-right .checkbox {
  margin-left: 20px;
}
.course_index .goods-sort .goods-sort-right .checkbox:hover {
  color: #ff6700;
}
.course_index .goods-sort .goods-sort-right .checkbox:hover i {
  color: #ff6700;
}
.course_index .goods-sort .goods-sort-right .checkbox span {
  display: inline-block;
  width: 18px;
  height: 18px;
  margin-right: 8px;
  border: 1px solid #e0e0e0;
  background-color: #fff;
  vertical-align: -2px;
  font-size: 16px;
  line-height: 18px;
  text-align: center;
  color: #fff;
}
.course_index .goods-sort .goods-sort-right .checkbox.checkbox-checked span {
  border-color: #ff6700;
  background-color: #ff6700;
}
.course_index .course-box {
 
}
.course_index .item_course {
  display: block;
  width: 32.333333%;
  height: 250px;
  float: left;
  margin-right: 1.5%;
  -webkit-transition: border-color 0.2s;
  -moz-transition: border-color 0.2s;
  -o-transition: border-color 0.2s;
  transition: border-color 0.2s;
  background: #fff;
  margin-top: 14px;
  padding-bottom: 10px;
  transition: box-shadow 0.5s linear;
  position: relative;
  overflow: hidden;
}
.course_index .item_course:nth-of-type(3n) {
  margin-right: 0px;
}
.course_index .item_course a:hover {
  color: #ff6700;
}
.course_index .item_course:hover {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}
.course_index .item_course:hover .pic-box .mask {
  filter: alpha(opacity=60);
  opacity: 0.6;
}
.course_index .item_course:hover .info-box {
  top: 85px;
}
.course_index .item_course:hover .brief {
  color: #999;
  border-left: 2px solid #999;
}
.course_index .item_course .pic-box {
  width: 1920px;
  height: 163px;
  display: table-cell;
  vertical-align: middle;
  text-align: center;
}
.course_index .item_course .pic-box img {
  max-width: 100%;
  display: block;
  margin: 0 auto;
}
.course_index .item_course .pic-box .mask {
  position: absolute;
  top: 0px;
  bottom: 0px;
  left: 0px;
  right: 0px;
  width: 100%;
  height: 163px;
  background: #000;
  filter: alpha(opacity=0);
  opacity: 0;
  transition: all .4s ease;
  overflow: hidden;
  text-indent: 2em;
  color: #eee;
  line-height: 25px;
}
.course_index .item_course .title {
  color: #282828;
  font-size: 15px;
  padding: 0px 15px;
  line-height: 35px;
}
.course_index .item_course .title a {
  line-height: 20px;
  height: 50px;
  /* white-space: nowrap; */
  overflow: hidden;
  text-overflow: ellipsis;
  display: block;
  padding: 9px 0px 0px;
}
.course_index .item_course .info-box {
  color: #605f5f;width: 100%;
  position: absolute;
  top: 163px;
  left: 0;bottom: 0px;
  background: #fff;
  z-index: 5;
  transition: all .4s ease;
}
.course_index .item_course .info-box span {
  display: block;
  float: left;
  width: 50%;
  line-height: 25px;
  font-size: 13px;
}
.course_index .item_course .info-box span.times {
  padding-left: 15px;
}
.course_index .item_course .info-box span.price {
  text-align: right;
  padding-right: 15px;
}
.course_index .item_course .info-box span.price b {
  color: #ff6700;
  font-weight: 500;
}
.course_index .item_course .info-box span.num {
  padding-left: 15px;
}
.course_index .item_course .info-box span.get {
  color: #ff6700;
  text-align: right;
  padding-right: 15px;
}
.course_index .item_course .brief {
  max-height: 72px;
  font-size: 12px;
  color: transparent;
  line-height: 18px;
  border-left: 2px solid transparent;
  margin-top: 10px;
  padding: 0 5px 0 10px;
  transition: all .8s ease;
  overflow: hidden;
}