body {
  overflow-x: hidden;
}

.index-title {
  font-size: 34px;
  margin: 50px 0 40px;
}

.bk.one {
  height: 42vw;
  min-height: 500px;
  min-width: 1200px;
  position: relative;
  overflow: hidden;
}
.bk.one > div {
  position: absolute;
  transition-duration: 0.6s;
  -webkit-transition-duration: 0.6s;
  -moz-transition-duration: 0.6s;
  -ms-transition-duration: 0.6s;
  opacity: 0;
  transition-timing-function: ease-out;
  -webkit-transition-timing-function: ease-out;
  -moz-transition-timing-function: ease-out;
  -ms-transition-timing-function: ease-out;
}
.bk.one > div img {
  width: 100%;
}
.bk.one > div.bg1 {
  width: 10%;
  top: 0;
  left: 0;
  transform: translateY(-100%);
  -webkit-transform: translateY(-100%);
  -moz-transform: translateY(-100%);
  -ms-transform: translateY(-100%);
  transition-delay: 0.1s;
  -webkit-transition-delay: 0.1s;
  -moz-transition-delay: 0.1s;
  -ms-transition-delay: 0.1s;
}
.bk.one > div.bg2 {
  width: 36%;
  top: 0;
  right: 0;
  transform: translateX(100%);
  -webkit-transform: translateX(100%);
  -moz-transform: translateX(100%);
  -ms-transform: translateX(100%);
  transition-delay: 0.4s;
  -webkit-transition-delay: 0.4s;
  -moz-transition-delay: 0.4s;
  -ms-transition-delay: 0.4s;
}
.bk.one > div.bg3 {
  width: 40%;
  bottom: 0;
  left: 0;
  transform: translateX(-100%);
  -webkit-transform: translateX(-100%);
  -moz-transform: translateX(-100%);
  -ms-transform: translateX(-100%);
  transition-delay: 0.2s;
  -webkit-transition-delay: 0.2s;
  -moz-transition-delay: 0.2s;
  -ms-transition-delay: 0.2s;
}
.bk.one > div.bg4 {
  width: 54%;
  top: 30%;
  left: 10%;
  transition-delay: 1s;
  -webkit-transition-delay: 1s;
  -moz-transition-delay: 1s;
  -ms-transition-delay: 1s;
  transition-duration: 0.4s;
  -webkit-transition-duration: 0.4s;
  -moz-transition-duration: 0.4s;
  -ms-transition-duration: 0.4s;
}
.bk.one.run > .bg1 {
  transform: translateY(0);
  opacity: 1;
}
.bk.one.run > .bg2 {
  transform: translateX(0);
  opacity: 1;
}
.bk.one.run > .bg3 {
  transform: translateX(0);
  opacity: 1;
}
.bk.one.run > .bg4 {
  top: 25%;
  opacity: 1;
}
.bk.two {
  display: flex;
  flex-wrap: wrap;
  padding-top: 90px;
  min-width: 1200px;
}
.bk.two img {
  width: 100%;
}
.bk.two > .left {
  width: 57%;
}
.bk.two > .left > .iso {
  padding: 0 5% 0 10%;
  box-sizing: border-box;
}
.bk.two > .right {
  width: 43%;
  padding: 0 6% 0 4%;
  box-sizing: border-box;
  transform: translate(100%, -100px);
}
.bk.two .bg1 {
  transform: translateX(-100%);
  transition-duration: 0.5s;
  transition-delay: 0.2s;
  opacity: 0;
}
.bk.two .bg2 {
  transform: translateY(50%);
  transition-duration: 0.4s;
  transition-delay: 0.8s;
  opacity: 0;
}
.bk.two .bg3 {
  transition-duration: 0.5s;
  transition-delay: 0.4s;
  opacity: 0;
}
.bk.two.run .bg1 {
  transform: translateX(0);
  opacity: 1;
}
.bk.two.run .bg2 {
  transform: translateY(0);
  opacity: 1;
}
.bk.two.run .bg3 {
  transform: translate(0, -100px);
  opacity: 1;
}
.bk.three {
  display: flex;
  flex-wrap: wrap;
  padding-bottom: 90px;
  padding-top: 40px;
  min-width: 1200px;
}
.bk.three img {
  width: 100%;
}
.bk.three > .left {
  width: 60%;
  position: relative;
}
.bk.three > .left > .leaf {
  position: absolute;
  bottom: -10%;
  left: 0;
  width: 14%;
}
.bk.three > .right {
  width: 40%;
  padding: 15% 6% 0 4%;
  box-sizing: border-box;
}
.bk.three .bg1 {
  transform: translateX(-100%);
  transition-duration: 0.4s;
  transition-delay: 0.2s;
  opacity: 0;
}
.bk.three .bg2 {
  transform: translateX(-100%);
  transition-duration: 0.2s;
  transition-delay: 0.6s;
  opacity: 0;
}
.bk.three .bg3 {
  transform: translateY(100px);
  transition-duration: 0.2s;
  transition-delay: 0.6s;
  opacity: 0;
}
.bk.three.run .bg1 {
  transform: translateX(0);
  opacity: 1;
}
.bk.three.run .bg2 {
  transform: translateX(0);
  opacity: 1;
}
.bk.three.run .bg3 {
  transform: translateY(0);
  opacity: 1;
}
.bk.four {
  display: flex;
  flex-wrap: wrap;
  padding-bottom: 20px;
  min-width: 1200px;
  position: relative;
}
.bk.four img {
  width: 100%;
}
.bk.four > .center {
  background-color: #050919;
  height: 34.1vw;
  width: 100%;
  min-height: 412px;
  position: absolute;
  top: 0;
  left: 0;
}
.bk.four > .left {
  width: 50%;
  position: relative;
  z-index: 1;
}
.bk.four > .right {
  width: 50%;
  position: relative;
  box-sizing: border-box;
  padding: 9% 17% 0 7%;
  z-index: 1;
}
.bk.four > .right > .box > .title {
  margin-right: 10%;
}
.bk.four .bk1 {
  opacity: 0;
  transition-duration: 0.3s;
  transition-delay: 0.2s;
}
.bk.four .bk2 {
  transform: translateX(-100%);
  transition-duration: 0.4s;
  transition-delay: 0.5s;
  opacity: 0;
}
.bk.four .bk3 {
  transform: translateY(-70px);
  transition-duration: 0.3s;
  transition-delay: 0.9s;
  opacity: 0;
}
.bk.four .bk4 {
  transform: translateY(70px);
  transition-duration: 0.3s;
  transition-delay: 0.9s;
  opacity: 0;
}
.bk.four.run .bk1 {
  opacity: 1;
}
.bk.four.run .bk2 {
  transform: translateX(0);
  opacity: 1;
}
.bk.four.run .bk3 {
  transform: translateY(0);
  opacity: 1;
}
.bk.four.run .bk4 {
  transform: translateY(0);
  opacity: 1;
}

.product-center {
  background-color: #f9f9f9;
}
.product-center > .block {
  position: relative;
}
.product-center > .block > .index-title {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 10;
}
.product-center > .block > .box {
  padding-top: 150px;
  margin: 0 50px;
  padding-bottom: 80px;
}
.product-center > .block > .box > .more {
  font-size: 22px;
  position: absolute;
  top: 50px;
  line-height: 30px;
  right: 20px;
  display: inline-block;
  z-index: 20;
}
.product-center > .block > .box > .more > span {
  display: inline-block;
  vertical-align: bottom;
}
.product-center > .block > .box > .more > i {
  display: inline-block;
  vertical-align: bottom;
  height: 30px;
  width: 30px;
  background-position: center center;
  background-size: auto;
  background-repeat: no-repeat;
}
.product-center > .block > .box > .btn {
  position: absolute;
  top: 500px;
  cursor: pointer;
  transition-duration: 0.1s;
  -webkit-transition-duration: 0.1s;
  -moz-transition-duration: 0.1s;
  -ms-transition-duration: 0.1s;
  z-index: 10;
}
.product-center > .block > .box > .btn.prev-btn {
  left: 0;
  transform: rotate(180deg);
  -webkit-transform: rotate(180deg);
  -moz-transform: rotate(180deg);
  -ms-transform: rotate(180deg);
}
.product-center > .block > .box > .btn.prev-btn:hover {
  left: -6px;
}
.product-center > .block > .box > .btn.next-btn {
  right: 0;
}
.product-center > .block > .box > .btn.next-btn:hover {
  right: -6px;
}
.product-center > .block > .box .swiper-pagination {
  top: 60px;
  bottom: auto;
  text-align: right;
  box-sizing: border-box;
  padding-right: 130px;
  z-index: 10;
}
.product-center > .block > .box .swiper-pagination .swiper-pagination-bullet {
  height: 10px;
  width: 10px;
  border: 2px solid #616161;
  background-color: transparent;
  opacity: 1;
}
.product-center > .block > .box .swiper-pagination .swiper-pagination-bullet.swiper-pagination-bullet-active {
  background-color: #616161;
}
.product-center > .block > .box .swiper-slide {
  padding-top: 40px;
  padding-bottom: 10px;
}
.product-center > .block > .box .swiper-slide .slide {
  margin: 0 7.5px;
  display: block;
  transition-duration: 0.2s;
  -webkit-transition-duration: 0.2s;
  -moz-transition-duration: 0.2s;
  -ms-transition-duration: 0.2s;
}
.product-center > .block > .box .swiper-slide .slide:hover {
  transform: translateY(-6px);
  -webkit-transform: translateY(-6px);
  -moz-transform: translateY(-6px);
  -ms-transform: translateY(-6px);
}
.product-center > .block > .box .swiper-slide .slide > .img {
  background-color: #fff;
  box-shadow: 1px 1px 4px rgba(200, 200, 200, 0.2);
}
.product-center > .block > .box .swiper-slide .slide > .img img {
  width: 100%;
}
.product-center > .block > .box .swiper-slide .slide > .text {
  position: relative;
  margin-top: -10px;
  z-index: 1;
}
.product-center > .block > .box .swiper-slide .slide > .text > span {
  display: block;
  color: #fff;
  text-align: center;
  line-height: 50px;
  font-size: 16px;
  margin: 0 15px;
  box-shadow: 1px 0 4px rgba(29, 32, 137, 0.6);
}