.product_params_main {
  padding: 40px 0 0;
  /* background: url('../images/1346.png') no-repeat right center; */
}
.product_params_main h3 .img {
  width: 390px;
  height: 28px;
  background: url('../images/logo_title.png') no-repeat center;
  margin-top: 12px;
}
.product_params_main h3 {
  font-size: 30px;
  font-weight: 400;
  margin: 0 0 45px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.product_params_center {
  width: 1200px;
  margin: 0 auto;
  /* box-shadow: 0 5px 5px #ace2ff; */
  display: flex;
  justify-content: space-between;
  box-sizing: border-box;
  margin-top: 20px;
  margin-bottom: 40px;
  position: relative;
  border: 1px solid #E5E5E5;
}
.product_params_center .introduce {
  background: #E9F3FF url('../images/75b4f16c3.png') no-repeat right 80% / auto;
  padding: 40px 20px;
  line-height: 2;
  font-size: 16px;
  width: 35%;
  box-sizing: border-box;
}
.product_params_center .params_list{
  display: flex;
  flex-wrap: wrap;
  box-sizing: border-box;
  width: 75%;
  margin-right: -3px;
}
.product_params_center .params_list .params_it{
  display: flex;
  width: 33.33333%;
  padding: 12px 20px 12px 8px;
  box-sizing: border-box;
  font-size: 16px;
  text-align: left;
  border-color: #E5E5E5;
  border-style: solid;
  border-width: 0;
  border-right-width: 1px;
  border-bottom-width: 1px;
}
.product_params_center .params_list .params_it:nth-last-child(1),
.product_params_center .params_list .params_it:nth-last-child(2){
  border-bottom: 0;
}
.product_params_center .params_list .params_it:nth-last-child(3n){
  border-right: 0;
}
.product_params_center .params_list .params_it.col2 {
  width: 66.66666%;
  border-right: 0;
}
.product_params_center .params_list .params_it .params_icon_box {
  width: 40px;
  margin: 0 12px 0 12px;
  flex-shrink: 0;
}
.product_params_center .params_list .params_it .it_con {
  display: flex;
  flex-direction: column;
}
.product_params_center .params_list .params_it .it_con .title {
  font-size: 20px;
  font-weight: 600;
}
.product_params_center .params_list .params_it .it_con .desc {
  line-height: 2;
  margin: 12px 0;
  font-size: 16px;
  text-align: justify;
}