.topbg {
  height: 482px;
  position: relative;
  overflow: hidden;
}
.topbg img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  min-width: 100%;
  min-height: 100%;
}
.toptitle {
  margin-top: 70px;
  text-align: center;
}
.toptitle h4 {
  font-size: 30px;
  font-weight: 600;
  color: #444;
  line-height: 30px;
}
.toptitle p {
  margin-top: 15px;
  font-size: 14px;
  color: #5f6464;
  line-height: 20px;
  max-width: 100%!important;
  width: 100%!important;
}
.botcontent {
  margin-top: 78px;
  display: flex;
  justify-content: space-between;
}
.botcontent .imgstyle1 {
  width: 47%;
  overflow: hidden;
}
.botcontent .imgstyle1 p {
  font-size: 14px;
  color: #5f6464;
  line-height: 25px;
  margin-top: 28px;
}
.botcontent .videobox {
  width: 100%;
  /* height: 277px; */
  overflow: hidden;
  position: relative;
}
.botcontent .videobox img {
  width: 100%;
}
.botcontent .txt {
  width: 46%;
  position: relative;
}
.botcontent .txt p {
  font-size: 14px;
  color: #5f6464;
  line-height: 25px;
}
.botcontent .txt img {
  height: 13px;
  position: absolute;
  bottom: 70px;
  left: 0;
}
.botcontent .btn_more{
  position: absolute;
  bottom: 0;
  left: 0;
}
.btn_more {
  display: block;
  width: 108px;
  height: 32px;
  border: 1px solid #213478;
  position: relative;
  text-align: center;
  line-height: 32px;
  font-size: 16px;
  font-weight: 500;
  color: #223579;
}
.btn_more span {
  transition: 0.4s all ease;
  position: absolute;
  opacity: 0;
}
.btn_more span:first-child {
  position: relative;
  opacity: 1;
  top: 0;
}
.btn_more:hover{
  border: 1px solid #213478;
}
.btn_more:hover span:first-child {
  margin-right: 30px;
}
.btn_more span:nth-child(2) {
  right: 50px;
  opacity: 0;
}
.btn_more:hover span:nth-child(2) {
  right: 30px;
  opacity: 1;
}
.btn_more span:nth-child(3) {
  right: 40px;
  transition: 0.3s all ease-in;
  opacity: 0;
}
.btn_more:hover span:nth-child(3) {
  right: 20px;
  opacity: 1;
}
.content li {
  padding-bottom: 78px;
}
.content li .wrap > .btn_more{
  margin: 60px auto 0;
}
.content li:nth-child(2n){
  background: #FBFBFB;
}
.imgstyle2 {
  width: 298px;
  
  text-align: center;
}
.imgstyle2 > img{
  text-align: center;
  margin-top: 24px;
}
.botcontent .imgstyle2 .videobox{
  height: 333px;
}
.videobox{
  position: relative;
}
.videobox a {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  left: 50%;
  width: 68px;
  opacity: 1;
  transition: 0.3s ease-in-out;
}
.videobox a img {
  width: 100%;
}
.videolist {
  margin-top: 50px;
  display: flex;
  justify-content: space-between;
}
.videolist .videobox{
  width: 24%;
}
.videolist .videobox img{
  width: 100%;
}
/* 适配 */
@media screen and (max-width: 1440px) {
  .content li {
    padding: 0 20px 50px;
  }
}
@media screen and (max-width: 900px) {
  .mobile .botcontent .imgstyle1{
    width: 100%;
  }
  .mobile .content li{
    padding: 30px 0;
  }
  .mobile .botcontent{
    margin-top: 30px;
    display: block;
  }
  .mobile .wrap{
    width: 90%;
  }
  .mobile .botcontent .txt{
    width: 100%;
    padding: 20px 0 50px;
    margin-bottom: 10px;
  }
  .mobile .botcontent .txt img {
    display: none;
  }
  .mobile .videolist{
    display: block;
  }
  .mobile .videolist .videobox{
    width: 100%;
    display: inline-block;
    margin-bottom: 10px;
  }
  .mobile .toptitle{
    margin-top: 30px;
  }
  .mobile .imgstyle1 {
    margin-top: 40px;
  }
}