body {
  background: #F4F4F4;
}
.nei_banner_box {
  width: 100%;
  height: calc(40px + 10rem);
}
.nei_banner_box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about_nav {
  background: #EDEFEE;
  display: flex;
  justify-content: center;
}
.about_nav .about_nav_item {
  width: calc(40px + 10rem);
  height: calc(10px + 3rem);
  background: #EDEFEE;
}
.about_nav .about_nav_item a {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-family: DM_Sans-regular;
  font-weight: 400;
  font-size: calc(6px + 0.5rem);
  color: #333333;
}
.about_nav .about_nav_item_act {
  background-color: #009944;
}
.about_nav .about_nav_item_act a {
  color: #ffffff;
}
.about_cer_box {
  width: 100%;
  padding: calc(20px + 3rem) 0;
}
.about_cer_box .about_cer {
  max-width: 1430px;
  width: 85%;
  margin: auto;
}
.about_cer_box .about_cer .about_history_title p:nth-of-type(1) {
  font-family: DM_Sans-bold;
  font-weight: bold;
  font-size: calc(8px + 2rem);
  color: #333333;
  letter-spacing: calc(0px + 0.1rem);
  text-align: center;
}
.about_cer_box .about_cer .about_history_title p:nth-of-type(1) span {
  color: #009944;
}
.about_cer_box .about_cer .about_history_title p:nth-of-type(2) {
  text-align: center;
  font-family: DM_Sans-medium;
  font-weight: 500;
  font-size: calc(6px + 0.5rem);
  color: #666666;
  line-height: calc(10px + 3rem);
}
.about_cer_box .about_cer .about_cer_list {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  row-gap: calc(10px + 1rem);
  margin-top: calc(5px + 2rem);
}
.about_cer_box .about_cer .about_cer_list .about_cer_item {
  padding: calc(10px + 0.5rem);
  width: 22.3777%;
  background: #FFFFFF;
  box-shadow: 0px calc(2px + 0.1rem) calc(2px + 0.1rem) 0px rgba(0, 0, 0, 0.1);
  border-radius: calc(2px + 0.1rem);
}
.about_cer_box .about_cer .about_cer_list .about_cer_item .about_cer_item_pic {
  width: 100%;
  height: calc(25px + 10rem);
}
.about_cer_box .about_cer .about_cer_list .about_cer_item .about_cer_item_pic img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about_cer_box .about_cer .about_cer_list .about_cer_item p {
  margin-top: calc(10px + 0.5rem);
  font-family: DM_Sans-regular;
  font-weight: 400;
  font-size: calc(6px + 0.5rem);
  color: #666666;
  line-height: calc(10px + 0.5rem);
  text-align: center;
}
@media (max-width: 1100px) {
  .about_nav {
    flex-direction: column;
    justify-content: flex-start;
  }
  .about_nav .about_nav_item {
    width: 100%;
    padding: calc(10px + 2rem) 0;
  }
  .about_nav .about_nav_item a {
    font-size: calc(12px + 1rem);
  }
  .about_cer_box .about_cer .about_history_title p:nth-of-type(1) {
    font-size: calc(16px + 1rem);
  }
  .about_cer_box .about_cer .about_history_title p:nth-of-type(2) {
    font-size: calc(12px + 1rem);
  }
  .about_cer_box .about_cer .about_cer_list .about_cer_item {
    width: 48.5%;
  }
  .about_cer_box .about_cer .about_cer_list .about_cer_item .about_cer_item_pic {
    height: calc(25px + 20rem);
  }
  .about_cer_box .about_cer .about_cer_list .about_cer_item p {
    font-size: calc(10px + 1rem);
    line-height: 1.5;
  }
}