.development{
  position: relative;
  width: 100%;
  height: 911px;
  overflow: hidden;
  background: url(https://www.chtf.com/public/images/course-bg.jpg) center center no-repeat;
}
.development .title{
  position: absolute;
  left: 0;
  top: 72px;
  width: 100%;
  color: #fff;
}
.course{
  position: relative;
  width: 1320px;
  height: 100%;
  margin: auto;
  z-index: 2;
}
.course-box{
  width: 100%;
}
.course-num{
  position: absolute;
  font-size: 16px;
  line-height: 36px;
  color: #fff;
  cursor: pointer;
}
.num1{
  left: 66px;
  bottom: 225px;
}
.num2{
  left: 28px;
  bottom: 314px;
}
.num3{
  left: 45px;
  bottom: 395px;
}
.num4{
  left: 98px;
  bottom: 463px;
}
.num5{
  left: 160px;
  bottom: 516px;
}
.num6{
  left: 235px;
  bottom: 564px;
}
.num7{
  left: 312px;
  bottom: 602px;
}
.num8{
  left: 395px;
  bottom: 630px;
}
.num9{
  top: 223px;
  left: 470px;
}
.num10{
  top: 203px;
  left: 558px;
}
.num11{
  top: 190px;
  left: 645px;
}
.num12{
  top: 180px;
  left: 745px;
}
.num13{
  top: 180px;
  right: 391px;
}
.num14{
  top: 189px;
  right: 298px;
}
.num15{
  top: 200px;
  right: 200px;
}
.num16{
  top: 222px;
  right: 120px;
}
.num17{
  top: 259px;
  right: 44px;
}
.num18{
  top: 305px;
  right: -16px;
}
.num19{
  top: 382px;
  right: -54px;
}
.num20{
  top: 460px;
  right: -35px;
}
.num21{
  top: 520px;
  right: -12px;
}
.num22{
  bottom: 309px;
  right: 30px;
}
.num23{
  bottom: 263px;
  right: 82px;
}
.num24{
  bottom: 219px;
  right: 139px;
}
.num25{
  bottom: 169px;
  right: 169px;
}
.num26{
  bottom: 129px;
  right: 199px;
}


.course .course-boxs .course-tbox{
  display: none;
  position: absolute;
  left: 292px;
  bottom: 61px;
  padding: 67px 0 0;
  width: 727px;
  height: 359px;
  background: #fff;
  border-radius: 7px;
  box-sizing: border-box;
}
.course .course-boxs .course-tbox.on{
  display: block;
}
.course .course-boxs .course-tbox .close{
  width: 37px;
  height: 37px;
  position: absolute;
  background: url(https://www.chtf.com/public/images/fw_icon3.png) center center no-repeat;
  right: 21px;
  top: 19px;
  cursor: pointer;
}
.course .course-boxs .course-tbox .course-name{
  width: 187px;
  height: 257px;
  border-right: 1px solid #ebe4e4;
  text-align: center;
  font-size: 20px;
  line-height: 32px;
  color: #033c72;
  float: left;
}
.course .course-boxs .course-tbox .course-name span{
  width: 60px;
  height: 66px;
  display: block;
  margin: auto;
  background: #2d53a7;
  line-height: 66px;
  font-size: 52px;
  color: #fff;
  margin-bottom: 32px;
}
.course .course-boxs .course-tbox .txt{
  padding-right: 5px;
  width: 425px;
  height: 256px;
  overflow: hidden;
  overflow-y: auto;
  float: left;
  margin-left: 32px;
  font-size: 16px;
  line-height: 32px;
  color: #7c7979;
}