.columnBg>img {
  display: block;
  width: auto;
  margin:0 auto;
}
.courseCont {
  width: 100%;
}
.both:after {
  display: block;
  content: "";
  clear: both;
}
.course_floor_first {
  width: 100%;
  padding: 0px 20px;
  box-sizing: border-box;
}
.course_floor_first_pic {
  width: 50%;
  box-sizing: border-box;
}
.course_common_pic {
  width: 30%;
  box-sizing: border-box;
  padding: 8px;
  border-radius: 5px;
  background-color: #ffffff;
  box-shadow: 0px 0px 5px 0px #d5cbcb;
  position: relative;
  z-index: 5;
}
.course_common_pic>img,
.course_floor_first_pic>img {
  display: block;
  width: 100%;
}
.course_floor_first_text {
  width: calc(100% - 55%) !important;
  margin-top: 100px;
}
.course_floor_text,
.course_common_text {
  width: calc(100% - 35%);
  box-sizing: border-box;
  padding: 20px 0px;
}
.course_floor_text>p {
  line-height: 32px;
  font-size: 18px;
  color: #000000;
}
.course_floor_sec,
.course_floor_thi,
.course_floor_four,
.course_floor_five {
  width:100%;
  margin-top: 50px;
  box-sizing: border-box;
  padding: 20px 0px;
}
.course_floor_background {
  width: 100%;
  position: relative;
}
.course_floor_background:after {
  display: block;
  content: '';
  position: absolute;
  width: 30%;
  z-index: 1;
  height: 300px;
  background-color: #ae0c2a;
  opacity: .2;
  top: 200px;
  left: 0px;
}
.course_floor_background+.course_floor_background:after {
  left: auto;
  right: 0px;
}
.course_floor_background .content {
  margin: 0px;
}
.course_common_text>h3 {
  display: block;
  width: 100%;
  font-size: 26px;
  line-height: 30px;
  color: #ae0c2a;
  padding-left: 25px;
  background: url(../images/icon_title.png) no-repeat 0px;
  background-size: 15px;
}
.course_floor_sec_tab_box {
  width: 100%;
  margin-top: 20px;
}
.course_floor_sec_tab_menu {
  width: 100%;
}
.course_floor_sec_tab_menu>a {
  display: inline-block;
  font-size: 18px;
  color: #000000;
  width:123px;
  height: 43px;
  box-sizing: border-box;
  border:1px solid #ebebeb;
  border-radius: 5px;
  text-align: center;
  line-height: 43px;
}
.course_floor_sec_tab_menu>a+a {
  margin-left: 20px;
}
.course_act {
  color: #ffffff !important !important;
  background: url(../images/icon_tab.png) no-repeat center center !important;
  border:0px solid #ae0c2a !important;
}
.course_floor_sec_tab_content {
  width: 100%;
  margin-top: 10px;
}
.course_floor_sec_tab_content>div>h2,
.course_common_text>h2 {
  display: block;
  width: 100%;
  margin-top: 30px;
  margin-bottom: 20px;
  font-size: 18px;
  color: #333333;
  line-height: 36px!important;
  border-bottom: 1px solid #e6e6e6;
  font-weight: bold;
  padding-bottom: 10px!important;
  position: relative;
  background: none !important;
  text-indent: 0!important;
}

.course_floor_sec_tab_content>div>h2:after,
.course_common_text>h2:after {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background-color: #333333;
  position: absolute;
  z-index: 5;
  left: 0px;
  bottom: 0;
}
.course_floor_sec_tab_content>div>p,
.course_common_text>p {
  font-size: 14px;
  color: #666666;
  line-height: 22px;
}

/* 学生活动 */

.student_act_box {
  width: 100%;
}
.student_act_item {
  width: 49%;
  height: auto;
  box-shadow: 0px 0px 5px 0px #d5cbcb;
  border-radius: 5px;
  overflow: hidden;
  background-color: #ffffff;
  box-sizing: border-box;
  padding: 30px 15px;
  margin-bottom: 50px;
  min-height: 477px;
}
.student_act_item:nth-child(2n){
  float: right;
}
.student_act_pic_cont {
  width: 49%;
  height: 162px;
  overflow: hidden;
}
.student_act_pic_cont + .student_act_pic_cont {
  float: right;
}
.student_act_pic_cont>img {
  display: block;
  width: 100%;
}
.student_act_text {
  clear: both;
  width: 100%;
  box-sizing: border-box;
  padding: 0px 10px;
  margin-top: 20px;
}
.student_act_text>h2 {
  display: block;
  text-align: center;
  font-size: 20px;
  color: #ae0c2a;
  line-height: 30px;
}
.student_act_text>p {
  font-size: 16px;
  margin-top: 5px;
  line-height: 25px;
  color: #333333;
}