.product_service_wrap {
  padding-bottom: 120px;
}
.product_service_wrap .picture,
.product_service_wrap .introduction {
  width: 50%;
  float: left;
  position: relative;
}
.product_service_wrap .above {
  margin-bottom: 50px;
}
.product_service_wrap .above::after,
.product_service_wrap .below::after {
  content: ""; 
  display: block; 
  height: 0; 
  clear: both; 
  visibility: hidden;  
}
.product_service_wrap .picture img {
  width: 100%;
  object-fit: cover;
}
.product_service_wrap .introduction .title {
  margin-bottom: 16px;
}
.product_service_wrap .introduction .title .title_txt {
  vertical-align: text-bottom;
  border-bottom: 2px solid #ebebeb;
  padding-bottom: 10px;
}
.product_service_wrap .introduction .title .title_txt,
.product_service_wrap .introduction .title .title_txt h4 {
  display: inline-block;
  color: #000;
}
.product_service_wrap .introduction .title img {
  vertical-align: text-bottom;
  margin-right: 37px;
  width: 95px;
}
.product_service_wrap .introduction .title .title_txt h4 {
  font-size: 22px;
  font-weight: bold;
  margin-right: 23px;
  position: relative;
}
.product_service_wrap .introduction .title .title_txt h4::after {
  content: "";
  position: absolute;
  width: 58px;
  height: 2px;
  background: #e62f17;
  bottom: -13px;
  left: 0;
}
.product_service_wrap .introduction .title .title_txt span {
  font-size: 18px;
}
.product_service_wrap .introduction .content {
  font-size: 14px;
  line-height: 26px;
}
.product_service_wrap .above .picture img {
  height: 320px;
}
.product_service_wrap .below .picture img {
  height: 250px;
}
.product_service_wrap .above .picture img.material {
  width: auto;
  height: auto;
  position: absolute;
  right: 150px;
  top: 160px;
}
.product_service_wrap .above .introduction {
  padding-left: 60px;
}
.product_service_wrap .below .introduction {
  padding-right: 60px;
}
.product_service_wrap .introduction .block {
  width: 506px;
  height: 124px;
  overflow: hidden;
}
.product_service_wrap .introduction .block.first {
  margin-bottom: 70px;
}
.product_service_wrap .below .introduction .block {
  float: right;
}


@media screen and (max-width: 640px){
	.product_service_wrap .picture,
  .product_service_wrap .introduction {
    width: 100%;
  }
  .product_service_wrap .picture img {
    height: auto;
  }
  .product_service_wrap .above .picture img.material {
    display: none;
  }
  .product_service_wrap .above .introduction {
    padding-left: 0;
  }

  .product_service_wrap .introduction .block {
    width: auto;
    height: auto;
    padding: 10px;
  }
  .product_service_wrap .above {
    margin-bottom: 0;
  }
  .product_service_wrap .introduction .block.first {
    margin-bottom: 20px;
  }
}