#yingyong {
  width: 100%;
  overflow: hidden;
  padding-bottom: 134px ;
  box-sizing: border-box;
}
#yingyong .yingyong {
  width: 1200px ;
  margin: 0px auto;
}
#yingyong .yingyong ul li {
  padding-top: 40px;
  box-sizing: border-box;
  overflow: hidden;
}
#yingyong .yingyong ul li > div {
  width: 492px;
  margin-top: 138px;
}
#yingyong .yingyong ul li > div h3 {
  font-size: 36px;
  font-family: Microsoft YaHei;
  font-weight: bold;
  color: #202020;
}
#yingyong .yingyong ul li > div span {
  display: block;
  margin-top: 25px;
  font-size: 16px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: #787878;
  line-height: 36px;
}
#yingyong .yingyong ul li:nth-child(1) img,
#yingyong .yingyong ul li:nth-child(3) img,
#yingyong .yingyong ul li:nth-child(5) img {
  float: left;
}
#yingyong .yingyong ul li:nth-child(1) > div,
#yingyong .yingyong ul li:nth-child(3) > div,
#yingyong .yingyong ul li:nth-child(5) > div {
  float: right;
}
#yingyong .yingyong ul li:nth-child(2) img,
#yingyong .yingyong ul li:nth-child(4) img,
#yingyong .yingyong ul li:nth-child(6) img {
  float: right;
}
#yingyong .yingyong ul li:nth-child(2) > div,
#yingyong .yingyong ul li:nth-child(4) > div,
#yingyong .yingyong ul li:nth-child(6) > div {
  float: left;
}
#yingyong .yingyong .yy_case {
  margin-top: 134px;
}
#yingyong .yingyong .yy_case h3 {
  text-align: center;
  font-size: 48px;
  font-family: Microsoft YaHei;
  font-weight: 400;
  color: #202020;
}
#yingyong .yingyong .yy_case ul {
  display: flex;
  justify-content: space-around;
  margin-top: 77px;
}