ul,li{
    list-style: none;
}
.body img {
  width: 100%;
}
.design_text {
  text-align: center;
  margin: 76px auto 117px;
}
.design_text h4 {
  width: 814px;
  height: 82px;
  line-height: 82px;
  background-color: #0dd1e1;
  font-family: SourceHanSansCN-Medium;
  font-size: 48px;
  color: #fff;
  margin: 50px auto;
}
.design_text p {
  font-family: SourceHanSansCN-Light;
  font-size: 24px;
  color: #444444;
}
.design_text p:nth-child(4) {
  width: 936px;
  margin: 0 auto;
}
.client_case .client_case_tiltle {
  width: 100%;
  height: 124px;
  text-align: center;
  border-top: 1px solid #d8d8d8;
  border-bottom: 1px solid #d8d8d8;
  font-family: SourceHanSansCN-Light;
  color: #484848;
  margin-bottom: 32px;
}
.client_case .client_case_tiltle h4 {
  font-size: 48px;
}
.client_case .client_case_tiltle p {
  font-size: 18px;
}
.client_case .client_case_img {
  display: flex;
  flex-wrap: wrap;
}
.client_case .client_case_img li {
  position: relative;
  width: 33.3%;
  transition: 3.5s linear;
}
.client_case .client_case_img li img {
  width: 100%;
  vertical-align: top;
}
.client_case .client_case_img li::after {
  position: absolute;
  content: "";
  opacity: 0;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.3);
  transition: all 0.3s linear;
}
.client_case .client_case_img li:hover::after {
  width: 100%;
  height: 100%;
  opacity: 1;
}
.tactics {
  font-family: SourceHanSansCN-Light;
  text-align: center;
  padding: 94px 0 98px;
  background-color: #f3f3f3;
}
.tactics h4 {
  font-size: 48px;
  color: #2e2e2e;
}
.tactics p {
  font-size: 18px;
  color: #444343;
}
.tactics .tactics_img {
  margin-top: 50px;
  display: flex;
  justify-content: space-between;
}
.tactics .tactics_img img {
  width: 23%;
  vertical-align: top;
}
.sever {
  text-align: center;
  padding: 66px 0 100px;
  background-color: #fff;
}
.sever p:nth-child(1) {
  font-family: SourceHanSansCN-Light;
  font-size: 48px;
  color: #2e2e2e;
  margin-bottom: 120px;
}
.sever .flow {
  height: 150px;
  background: url(../images/picture_albumBack.png) no-repeat;
  background-size: 100%;
  display: flex;
  justify-content: space-around;
  align-items: center;
}
.sever .flow li {
  font-family: SourceHanSansCN-Medium;
  font-size: 30px;
  color: #ffffff;
}
.sever p:nth-child(3) {
  font-family: SourceHanSansCN-Medium;
  font-size: 48px;
  color: #101010;
  margin: 110px auto 10px;
}
.sever p:nth-child(4) {
  font-family: SourceHanSansCN-Light;
  font-size: 24px;
  color: #101010;
}