.section-four ul{
  padding-bottom: 0 !important;
}
.course  ul li .con{
  line-height: 0;
  position: relative;
}
.course ul li{
  margin-bottom: 30px;
}
.comprehensive{
  position: absolute;
    width: 100%;
    bottom: 0;
    background-color: rgba(0,0,0,.2);
}
.comprehensive p{
  color: #fff;
  padding-left: 30px;
  line-height: 50px;
}
.banner_center {
    width: 80%;
    margin: 0 auto;
  }

.section-six li .hover-con {
  width: 100%;
  height: 330px;
  padding-top: 30px;
  border-radius: 4px;
}
.hover-con {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.section-six .detail {
  padding-top: 8px;
  line-height: 20px;
  width: 80%;
  margin: 0 auto;
  color: #999;
}
.detail.pnew {
  width: 80%;
  margin: 0 auto;
  margin-top: 20px;
  height: 100px;
  text-align: center;
}
.icon-img {
  width: 128px;
  height: 128px;
  object-fit: contain;
  margin-bottom: 15px;
}

.comprehensive-hover{
  position: absolute;
    top: 0;
    height: 100%;
    width: 100%;
    left: 0;
    line-height: 24px !important;
    font-size: 15px;
    color: #fff;
    transition: transform 0.6s;
    transform: translateY(1000px);
}
.comprehensive-hover .course-title{
  padding: 20px 20px 0 27px;
  color: #fff;
  font-size: 18px;
  font-weight: 600;
}
.comprehensive-hover .course-context{
  padding: 10px 20px 0 27px;
  text-align: left;
}
.hovers{
  position: absolute;
  top: 0;
  height: 100%;
  width: 100%;
  left: 0;
  opacity: 0;
  background: linear-gradient(
      to bottom,
      rgba(0,0,0,.7) 0%,
      rgba(0,0,0,0.6) 10%,
      rgba(0,0,0,.4) 20%,
      rgba(0,0,0,.4) 30%,
      rgba(0,0,0,.4) 40%,
      rgba(0,0,0,.4) 50%,
      rgba(0,0,0,.4) 60%,
      rgba(0,0,0,.4) 70%,
      rgba(0,0,0,.4) 80%,
      rgba(0,0,0,.6) 90%,
      rgba(0,0,0,.7) 100%);
      transition: opacity 0.5s;
}
.section-four ul li .con{
  box-shadow: none;
}
.col_4:hover .comprehensive{
  opacity: 0;
}
.col_4:hover .hovers{
  opacity: 1;
}
.col_4:hover .comprehensive-hover{
  transform: translateY(0);
}
.col_3:hover .comprehensive{
  opacity: 0;
}
.col_3:hover .hovers{
  opacity: 1;
}
.col_3:hover .comprehensive-hover{
  transform: translateY(0);
}

.mb_0{
  margin-bottom: 0 !important;
}
.mt_0{
  margin-top: 0 !important;
}
.col_2{
  width: 20%;
}