.natural .banner .banner_txt {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.natural .banner .banner_txt h6 {
  position: relative;
  left: auto;
  top: auto;
  transform: none;
  margin-bottom: 50px;
}
.natural .banner .banner_txt p {
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 20px;
}
.natural .natural_head {
  background: #FFFFFF;
  box-shadow: 0px 4px 16px 0px rgba(0, 0, 0, 0.1);
}
.natural .natural_head > div {
  height: 90px;
  overflow: hidden;
}
.natural .natural_head > div a {
  display: inline-block;
  padding: 0 25px;
  line-height: 90px;
  height: 100%;
  position: relative;
  color: var(--themeColor2);
}
.natural .natural_head > div a::before {
  content: "";
  position: absolute;
  height: 16px;
  width: 1px;
  background: rgba(0, 51, 102, 0.3);
  top: 50%;
  right: 0;
  transform: translateY(-50%);
}
.natural .natural_head > div a:first-of-type {
  padding-left: 0;
}
.natural .natural_head > div a:first-of-type.active::after {
  content: "";
  width: calc(100% - 25px);
  left: 0;
  transform: none;
}
.natural .natural_head > div a:last-of-type::before {
  content: "";
  width: 0;
}
.natural .natural_head > div a.active {
  font-family: Boldss;
  color: var(--themeColor);
}
.natural .natural_head > div a.active::after {
  content: "";
  width: calc(100% - 50px);
  height: 4px;
  background: var(--themeColor);
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
}
.natural_cantent {
  background: url('/image/natural_ul.svg') no-repeat;
  background-size: cover;
  padding: 100px 0;
}
.natural_cantent ul li {
  width: calc((100% - 40px) / 3);
  margin-right: 20px;
  margin-bottom: 20px;
  height: 200px;
  border-radius: 8px;
  overflow: hidden;
}
.natural_cantent ul li:nth-child(3n) {
  margin-right: 0;
}
.natural_cantent ul li:hover .natural_li {
  transform: rotateY(180deg);
  background: #f4f8ff;
  
}
.natural_cantent ul li .natural_li {
  height: 100%;
  width: 100%;
  background: var(--themeColor);
  position: relative;
  padding: 30px;
  transition: 0.2s ease;
  /*transition: all 2s ease;*/
}
.natural_cantent ul li .natural_li .lk {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotateY(180deg);
  color: transparent;
  font-weight: bold;
  -webkit-text-stroke: 1px #e4e7ee;
  font-size: 140px;
  font-family: Boldss;
}
.natural_cantent ul li .natural_li .zhengshu {
  display: block;
  height: 100%;
  object-fit: cover;
}
.natural_cantent ul li .natural_li .tex {
  display: none;
  width: 100%;
  position: relative;
  z-index: 10;
  text-align: center;
  transform: rotateY(-180deg);
}
.natural_cantent ul li .natural_li .tex > div {
  width: 100%;
}
.natural_cantent ul li .natural_li .tex > div > div {
  width: 80%;
}
.natural_cantent ul li .natural_li .tex p {
  font-weight: bold;
  font-family: Mediumss;
  line-height: 1.5;
  margin-bottom: 10px;
}
.natural_cantent ul li .natural_li .tex .hua2 {
  transform: rotate(180deg);
}
@media screen and (max-width: 1100px) {
  .natural_cantent ul li .natural_li .lk {
    font-size: 110px;
  }
}
@media screen and (max-width: 900px) {
  .natural_cantent ul li {
    width: calc(50% - 10px);
  }
  .natural_cantent ul li:nth-child(3n) {
    margin-right: 20px;
  }
  .natural_cantent ul li:nth-child(2n) {
    margin-right: 0;
  }
}
@media screen and (max-width: 600px) {
  .natural_cantent ul li {
    width: 100%;
    margin-right: 0 !important;
  }
}