img{
  width:100%;
}
.w{
  width:1200px;
  margin:0 auto;
}
.case_content{
  margin-bottom:80px;
}
h3{
  margin-top:42px;
  margin-bottom:8px;
  font-size:20px;
  color:#323232;
}
h3 span{
  color:#00acad !important;
}
.english_text{
  color:#999;
}
.item_imgs{
  margin-top:40px;

}
.case_logo{
  height:160px;
  width:340px;
  background:#434354;
}
.case_logo .logo_img{
  width: 260px;
  height: 80px;
  margin: 0px auto;
  padding-top: 54px;
}
.case_logo .logo_img img{
  width: 80%;
  margin-left:10%;
}

.case_bg {
  width:340px;
  height:340px;
  position: relative;
}
.img_right {
  width:860px;
  height:500px;
}
.all_text{
  position: absolute;
  color:#fff;
  font-size:14px;
  top:36px;
  left:30px;
  width:300px;
}
.text_desc{
  margin-top:18px;
  /* height:24px; */
}
.text_desc span{
  color:#0074ad;
  display:inline-block;
  position: relative;
  background:#fff;
  line-height:24px;
  padding: 0px 8px;
  margin-bottom:10px;
}
.span1::after{
  content:"";
  background:url("../img/about_sd/arrow.png") no-repeat;
  position: absolute;
  width:18px;
  height:24px;
  right:-18px;
  top:0px;
}
.span2::after{
  content:"";
  background:url("../img/about_sd/arrow.png") no-repeat;
  position: absolute;
  width:18px;
  height:24px;
  right:-18px;
  top:0px;
}
.span3::after{
  content:"";
  background:url("../img/about_sd/arrow.png") no-repeat;
  position: absolute;
  width:18px;
  height:24px;
  right:-18px;
  top:0px;
}
.span4::after{
  content:"";
  background:url("../img/about_sd/arrow.png") no-repeat;
  position: absolute;
  width:18px;
  height:24px;
  right:-18px;
  top:0px;
}
.text_desc span:nth-child(1){
  margin-right:36px;
}
.case_introduce{
  margin-top:32px;
}
.case_introduce p{
  /* margin-bottom:15px; */
  margin-top:12px;
}
.sec_img{
  background:#e7f6ee !important;
}
.sec_all_text{
  top:20px !important;
}
.sec_text_desc,.forth_text_desc{
  width:270px;
}
.sec_text_desc span{
  color:#42b542 !important;
  
}
.sec_case_introduce{
  margin-top:14px !important;
}
.span4{
  margin-left: 36px;
}
.third_case_logo{
  background:#aacfef;
}
.third_case_introduce{
  margin-top:14px;
}
.third_all_text{
  top:20px;
}
.forth_text_desc{
  margin-top:15px;
}
.forth_text_desc span{
  color:#c84126 ;
  
}
.forth_case_bg{
  background:#fef07c;
}
.forth_case_introduce p{
  margin-top:5px;
}