body,
html,
p,
h1,
h2,
h3,
h4,
h5,
h6,
input,
span,
ul,
li,
ol {
  margin: 0;
  padding: 0;
}
a {
  text-decoration: none;
}
.kelan_head .itema {
  color: #fff;
}
.kelan_head2 {
  background-color: rgba(1, 18, 60, 0.48);
  box-shadow: 0 0 6px 0 rgba(0, 0, 0, 0.3);
}
.kelan_head2 .itema {
  color: #000;
}
.kelan_head,
.kelan_head2 {
  width: 100%;
  height: 60px;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 100;
}
.kelan_head .head_content,
.kelan_head2 .head_content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 1200px;
  margin: 0 auto;
  height: 60px;
}
.kelan_head .head_content .logo,
.kelan_head2 .head_content .logo {
  width: 170px;
}
.kelan_head .head_content .logo img,
.kelan_head2 .head_content .logo img {
  width: 100%;
}
.kelan_head .head_content .head_nav .nav,
.kelan_head2 .head_content .head_nav .nav {
  padding: 0 10px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_head .head_content .head_nav .nav .item,
.kelan_head2 .head_content .head_nav .nav .item {
  height: 60px;
  padding: 0 25px;
  cursor: pointer;
  position: relative;
}
.kelan_head .head_content .head_nav .nav .item .itema,
.kelan_head2 .head_content .head_nav .nav .item .itema {
  width: 100%;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
  font-size: 14px;
  color: #fff;
}
.kelan_head .head_content .head_nav .nav .item .itema:hover,
.kelan_head2 .head_content .head_nav .nav .item .itema:hover {
  color: #1861d7;
}
.kelan_head .head_content .head_nav .nav .item .list,
.kelan_head2 .head_content .head_nav .nav .item .list {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 140px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  display: none;
  background-color: rgba(1, 18, 60, 0.48);
}
.kelan_head .head_content .head_nav .nav .item .list .item2,
.kelan_head2 .head_content .head_nav .nav .item .list .item2 {
  width: 100%;
  height: 30px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 14px;
  color: #fff;
  text-decoration: none;
}
.kelan_head .head_content .head_nav .nav .item .list .item2:hover,
.kelan_head2 .head_content .head_nav .nav .item .list .item2:hover {
  background-color: #3072d8;
}
.kelan_head .head_content .head_nav .nav .item .list .item2:last-child,
.kelan_head2 .head_content .head_nav .nav .item .list .item2:last-child {
  border-bottom: 0;
}
.swiper-container {
	width: 100%;
	height: 100%;
	position: relative;
	right: 0px;
}
.swiper-container .mark_p {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 100;
  color: #fff;
  font-size: 40px;
  font-family: "黑体";
}
.kelan_banner {
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_banner .swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: -webkit-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  -webkit-justify-content: center;
  justify-content: flex-start;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
  overflow: hidden;
  transition: all 2s;
  position: relative;
}
.kelan_banner .swiper-slide img {
 
  width: 1100px;
  position: relative;
  left: 50%;
  transform: translate(-50%);
	    height: 383px;
}
.kelan_banner .jt_icon {
  opacity: 0;
  transition: opacity 1s;
}
.kelan_banner:hover .jt_icon {
  opacity: 1;
}
.footer_nav {
  width: 100%;
  height: 270px;
  background-color: #eeeff4;
  margin-top: 0px;
}
.footer_nav .footer_content {
  width: 1050px;
  margin: 0 auto 0;
  padding: 45px 0;
  display: flex;
  justify-content: space-between;
  align-items: stretch;
}
.footer_nav .footer_content .left_nav {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
}
.footer_nav .footer_content .left_nav .item {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-direction: column;
}
.footer_nav .footer_content .left_nav .item .atitle {
  height: 40px;
  border-bottom: 1px solid #dcdde2;
  width: 100%;
  font-size: 16px;
  color: #404040;
}
.footer_nav .footer_content .left_nav .item .atitle p {
  width: calc(100%);
  height: calc(100%);
  position: relative;
}
.footer_nav .footer_content .left_nav .item .atitle p::after {
  content: ' ';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 15px;
  height: 2px;
  background-color: #70b0f5;
}
.footer_nav .footer_content .left_nav .item .item_nav {
  padding-top: 25px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-direction: column;
  padding-right: 43px;
}
.footer_nav .footer_content .left_nav .item .item_nav .item_li {
  font-size: 14px;
  color: #676767;
     margin-top: 9px;
  cursor: pointer;
  text-decoration: none;
}
.footer_nav .footer_content .left_nav .item .item_nav .item_li:hover {
  color: #70b0f5;
}
.footer_nav .footer_content .qrcode {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  flex-direction: column;
}
.footer_nav .footer_content .qrcode img {
  width: 80px;
  height: 80px;
}
.footer_nav .footer_content .qrcode p {
  font-size: 11px;
  color: #999;
  text-align: center;
  margin-top: 15px;
}
.footer {
  width: 100%;
  height: 34px;
  background-color: #0a263e;
  display: flex;
  justify-content: center;
  align-items: center;
}
.footer .foot_center {
  width: 1050px;
  color: #78808a;
  font-size: 11px;
	    text-align: center;
}
.kelan_index .product {
        width: 100%;
    height: 0;
    margin: 0 auto 0;
    display: flex;
    justify-content: center;
    align-items: center;
}
.kelan_index .product .pro_content {
/*  width: 801px;
  height: 610px;*/
	    position: absolute;
    top: 161px;
	    height: 67%;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
  display: none;
}
.kelan_index .product .pro_content .item {
  width: calc(100% / 3);
  height: calc(100% / 2);
  background-color: #eeeff4;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  position: relative;
  cursor: pointer;
}
.kelan_index .product .pro_content .item img {
  width: 100%;
  height: 100%;
}
.kelan_index .product .pro_content .item p {
  font-size: 16px;
  color: #404040;
  margin-top: 5px;
}
.kelan_index .product .pro_content .item .mask {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 30;
  width: calc(100% - 60px);
  height: 100%;
  background-color: rgba(25, 101, 193, 0.8);
  padding: 0 30px;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  display: none;
  transition: all 1s;
}
.kelan_index .product .pro_content .item .mask p {
  font-size: 16px;
  color: #fff;
  width: 100%;
}
.kelan_index .product .pro_content .item .mask span {
  font-size: 16px;
  color: #fff;
  margin-top: 40px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  width: 100%;
}
.kelan_index .product .pro_content .item:hover .mask {
  display: flex;
}
.kelan_index .product .pro_nav {
    width: 120px;
    height: calc(127%/2);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    position: absolute;
    right: 0px;
    z-index: 9999;
}
.kelan_index .product .pro_nav .item {
    width: 100%;
    height: calc(100% / 4);
    background-color: #a0a2a4;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    cursor: pointer;
}
.kelan_index .product .pro_nav .item img {
  width: 100%;
  height: 100%;
}
.kelan_index .product .pro_nav .item p {
  font-size: 16px;
  color: #f0f5fb;
  margin-top: 5px;
}
.kelan_index .product .pro_nav .item:last-child {
  border-bottom: 0;
}
.kelan_index .product .pro_nav .active {
  background: rgba(2, 135, 211, 0.6);
}
.kelan_index .case {
  width: 100%;
  height: 730px;
  background: url(../images/kl_1.jpg) no-repeat center top;
  background-color: #eeeff4;
 
}
.kelan_index .case .case_title {
  width: 100%;
     font-size: 38px;
  color: #ffffff;
  line-height: 30px;
  letter-spacing: 5px;
  font-weight: 500;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 60px;
}
.kelan_index .case .case_desc {
  width: 100%;
  font-size: 11px;
  color: #ffffff;
  line-height: 30px;
  letter-spacing: 5px;
  font-weight: 500;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 20px;
}
.kelan_index .case .case_content {
 width: calc(1200px - 30px);
    height: calc(523px - 30px);
  padding: 15px;
  background-color: #fff;
  margin: 67px auto 0;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
}
.kelan_index .case .case_content img {
  width: 100%;
}
.kelan_index .case .case_content .item {
  width: calc(100% / 3);
  height: calc(100% / 2);
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_index .case .case_content .item .img {
  width: 100%;
}
.kelan_index .case .case_content .item .img img {
  width: 100%;
  height: 100%;
}
.kelan_index .case .case_content .item .txt {
  font-size: 18px;
  position: relative;
  line-height: 28px;
}
.kelan_index .case .case_content .item .txt::after {
  content: ' ';
  position: absolute;
  left: 50%;
  bottom: -15px;
  transform: translateX(-50%);
  width: 40px;
  height: 2px;
  background-color: #aacbf3;
}
.kelan_index .case .more_case {
  font-size: 18px;
  display: flex;
  justify-content: center;
  margin-top: 50px;
  align-items: center;
}
.kelan_index .case .more_case a {
  color: #70b0f5;
  cursor: pointer;
  text-decoration: none;
}
.kelan_index .video {
  width: 100%;
  height: 545px;
}
.kelan_index .video .video_nav {
  width: 850px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 30px auto 0;
}
.kelan_index .video .video_nav .item {
  display: flex;
  justify-content: center;
  align-items: center;
  line-height: 30px;
  position: relative;
  margin-right: 50px;
  cursor: pointer;
  text-decoration: none;
	font-size: 16px;color: #333d42;
	
}
.kelan_index .video .video_nav .item a {
  text-decoration: none;
}
.kelan_index .video .video_nav .item:last-child {
  margin-right: 0;
}
.kelan_index .video .video_nav .item::after {
  content: ' ';
  background-color: #85868d;
  width: 30px;
  height: 2px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -8px;
  transition: all 1s;
}
.kelan_index .video .video_nav .active::after {
  content: ' ';
  background-color: #70b0f5;
  width: 100%;
  height: 2px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: -8px;
  transition: all 1s;
}
.kelan_index .video .video_content .swiper-slide {
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: -webkit-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
  transition: 300ms;
}
.kelan_index .video .video_content .swiper-slide:not(.swiper-slide-active) {
  transform: scale(0.8);
}
.kelan_index .video .video_content .video_list {
  width: 1200px;
  margin-top: 50px;
}
.kelan_index .video .video_content .video_list img {
  width: 50px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  cursor: pointer;
}
.kelan_index .video .video_content .video_list video {
  width: 100%;
  cursor: pointer;
}
.kelan_index .video .video_content2 {
  margin: 80px auto 0;
}
.kelan_index .video .video_content2 .video_list {
  position: relative;
  display: flex;
  margin: 0 auto 0;
  width: 940px;
  justify-content: center;
  align-items: center;
  height: 270px;
}
.kelan_index .video .video_content2 .video_list .item {
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  transition: all 1s;
}
.kelan_index .video .video_content2 .video_list .item .img {
  width: 100%;
}
.kelan_index .video .video_content2 .video_list .item .play_icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  cursor: pointer;
}
.kelan_index .video .video_content2 .video_list .video_1 {
  width: 540px;
  height: 310px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 10;
}
.kelan_index .video .video_content2 .video_list .video_2 {
  width: 470px;
  height: 270px;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 8;
}
.kelan_index .video .video_content2 .video_list .video_3 {
  width: 470px;
  height: 270px;
  position: absolute;
  top: 0;
  left: 470px;
  z-index: 6;
}
.kelan_index .video .video_play {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #fff;
  z-index: 100;
  display: none;
}
.kelan_index .video .video_play .play_content {
  width: 100%;
  height: calc(100%);
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_index .video .video_play .play_content .video_content {
  display: inline-block;
  height: calc(100%);
  position: relative;
}
.kelan_index .video .video_play .play_content .video_content video {
  height: calc(100%);
}
.kelan_index .video .video_play .play_content .video_content .play_head {
  width: calc(100% - 40px);
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 0 20px;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 100;
  color: #fff;
  height: 60px;
}
.kelan_index .video .video_play .play_content .video_content .play_head .ctitle {
  font-size: 14px;
  height: 30px;
  padding: 0 30px;
  border-radius: 20px;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.kelan_index .video .video_play .play_content .video_content .play_head .del {
  cursor: pointer;
  font-size: 14px;
  height: 30px;
  padding: 0 15px;
  border-radius: 20px;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  margin-left: 20px;
}
.kelan_index .video .video_play .play_content .video_content .play_head .del img {
  width: 30px;
  height: 30px;
  cursor: pointer;
}
.kelan_index .video .video_play .play_content .video_content .play_operation {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 60px;
  background-color: rgba(0, 0, 0, 0.45);
  display: flex;
  justify-content: flex-start;
  align-items: center;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .play,
.kelan_index .video .video_play .play_content .video_content .play_operation .stop {
  width: 60px;
  height: 60px;
  min-width: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .play img,
.kelan_index .video .video_play .play_content .video_content .play_operation .stop img {
  width: 45px;
  cursor: pointer;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .stop {
  display: none;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .time {
  color: #fff;
  font-size: 14px;
  min-width: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .progres {
  flex-grow: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .progres input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  border-radius: 10px;
  /*这个属性设置使填充进度条时的图形为圆角*/
  position: relative;
  z-index: 10;
  margin: 0;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .progres input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .progres input[type=range]:focus {
  outline: none;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .progres input[type=range]::-webkit-slider-runnable-track {
  height: 10px;
  background-color: #b2b2b2;
}
.kelan_index .video .video_play .play_content .video_content .play_operation .progres input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 5px;
  height: 10px;
  margin-top: 0;
  /*使滑块超出轨道部分的偏移量相等*/
  background: #009aef;
  border-radius: 0;
  /*外观设置为圆形*/
}
.kelan_index .video .more_case {
  font-size: 18px;
  display: flex;
  justify-content: center;
 
  align-items: center;
}
.kelan_index .video .more_case a {
  color: #70b0f5;
  cursor: pointer;
  text-decoration: none;
}
.kelan_index .map {
  width: 100%;
  height: 670px;
  background-color: #5b9dee;
  margin-top: 40px;
}
.kelan_index .map .map_title {
  width: 100%;
  font-size: 36px;
  color: #ffffff;
  line-height: 30px;
  letter-spacing: 5px;
  font-weight: 500;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 80px;
  letter-spacing: 3px;
}
.kelan_index .map .map_desc {
  width: 100%;
  font-size: 11px;
  color: #ffffff;
  line-height: 30px;
  letter-spacing: 5px;
  font-weight: 500;
  display: flex;
  justify-content: center;
  align-items: center;
  padding-top: 20px;
  letter-spacing: 2px;
}
.kelan_index .map .map_content {
  width: 850px;
  margin: 40px auto 0;
  position: relative;
}
.kelan_index .map .map_content .map_img {
  width: 100%;
}
.kelan_index .map .map_content .item {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  position: absolute;
}
.kelan_index .map .map_content .item p {
  font-size: 14px;
  color: #fff;
  padding-bottom: 6px;
}
.kelan_index .map .map_content .map1 {
  top: 50px;
  left: 165px;
}
.kelan_index .map .map_content .map2 {
  top: 130px;
  left: 240px;
}
.kelan_index .map .map_content .map3 {
  top: 100px;
  left: 400px;
}
.kelan_index .map .map_content .map4 {
  top: 50px;
  left: 450px;
}
.kelan_index .map .map_content .map5 {
  top: 55px;
  left: 580px;
}
.kelan_index .map .map_content .map6 {
  top: 75px;
  left: 640px;
}
.kelan_index .map .map_content .map7 {
  top: 150px;
  left: 700px;
}
.kelan_index .map .marquee {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 30px;
}
.kelan_index .map .marquee marquee {
  width: 600px;
  color: #fff;
  font-size: 20px;
}
.kelan_index .introduce {
  background-color: #eeeff4;
  padding: 105px 0 77px 0;
}
.kelan_index .introduce .int_content {
  width: 850px;
  margin: 0 auto 0;
  display: flex;
  justify-content: center;
  align-items: stretch;
}
.kelan_index .introduce .int_content .int_txt {
	width: 360px;
	margin-right: 10px;
	position: relative;
	right: 50px;
}
.kelan_index .introduce .int_content .int_txt .atitle {
  color: #333e43;
  font-size: 36px;
}
.kelan_index .introduce .int_content .int_txt .adesc {
  margin-top: 20px;
  font-size: 11px;
  color: #999;
}
.kelan_index .introduce .int_content .int_txt p {
  font-size: 11px;
     color: #696969;
  margin-top: 40px;
  line-height: 24px;
}
.kelan_index .introduce .int_content .int_txt .more {
  font-size: 18px;
  display: flex;
  justify-content: flex-start;
  margin-top: 50px;
  align-items: center;
}
.kelan_index .introduce .int_content .int_txt .more a {
  color: #70b0f5;
  cursor: pointer;
  text-decoration: none;
}
.kelan_index .introduce .int_content .int_banner {
	width: 475px;
	position: relative;
	right: -20px;
}
.kelan_index .introduce .int_content .int_banner img {
  width: 100%;
}
.kelan_index .introduce .int_content .int_banner .int_banner_bg {
  position: absolute;
  top: -20px;
  right: -23px;
  border: 2px solid #70b0f5;
  width: 100%;
  height: 100%;
}
.kelan_index .modular {
  width: 1050px;
  height: 295px;
  margin: 0 auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 0 5px 0;
}
.kelan_index .modular .item {
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  position: relative;
  text-decoration: none;
}
.kelan_index .modular .item .img {
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_index .modular .item .img img {
  width: 48px;
}
.kelan_index .modular .item .txt {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-direction: column;
  padding-left: 8px;
}
.kelan_index .modular .item .txt p {
	font-size: 25px;
	color: #1a1c26;
	font-family: "黑体";
}
.kelan_index .modular .item .txt span {
  font-size: 11px;
  color: #13161a;
  margin-top: 2px;
}
.kelan_index .modular .item::after {
	position: absolute;
	left: 56px;
	bottom: -20px;
	content: ' ';
	width: 45px;
	height: 2px;
	background-color: #85868d;
	transition: all 1s;
}
.kelan_index .modular .active::after {
	position: absolute;
	left: 0;
	bottom: -20px;
	content: ' ';
	width: 100%;
	height: 2px;
	background-color: #70b0f5;
	transition: all 1s;
}
.kelan_index .development {
  background-color: #5b9dee;
  padding-bottom: 125px;
}
.kelan_index .development .dev_content {
  width: 900px;
  margin: 0 auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.kelan_index .development .dev_content .img {
  width: 265px;
}
.kelan_index .development .dev_content .img img {
  width: 100%;
}
.kelan_index .development .dev_content .txt {
  width: 500px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-direction: column;
}
.kelan_index .development .dev_content .txt time {
  font-size: 36px;
  color: #fff;
}
.kelan_index .development .dev_content .txt time strong {
  font-size: 152px;
  margin-right: 6px;
}
.kelan_index .development .dev_content .txt p {
  font-size: 20px;
  margin-top: 22px;
  color: #fff;
}
.kelan_index .development .dev_node {
  width: 100%;
  height: 2px;
  background-color: #fff;
  margin: 74px auto 0;
  position: relative;
}
.kelan_index .development .dev_node .node_nav {
  width: 800px;
  height: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.kelan_index .development .dev_node .node_nav .item {
  width: 18px;
  height: 18px;
  border: 2px solid #fff;
  border-radius: 50%;
  background-color: #70b0f5;
  position: relative;
  margin-right: 65px;
  cursor: pointer;
}
.kelan_index .development .dev_node .node_nav .item p {
  position: absolute;
  bottom: -35px;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  font-size: 16px;
  white-space: nowrap;
}
.kelan_index .development .dev_node .node_nav .item:last-child {
  margin-right: 0;
}
.kelan_index .development .dev_node .node_nav .item::after {
  content: ' ';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all 1s;
}
.kelan_index .development .dev_node .node_nav .active::after {
  content: ' ';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #0000ff;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all 1s;
}
.kelan_index .news {
  width: 100%;
      height: 530px;
  background: url(../images/news1_2.jpg) no-repeat center center;
  position: relative;
  padding-bottom: 0;
  margin-bottom: 60px;
}
.kelan_index .news .news_content {
  position: absolute;
      top: 28px;
  right: 0;
  bottom: 0;
  left: calc(50% - 120px);
  background-color: #fff;
  padding: 45px 60px;
}
.kelan_index .news .news_content .news_nav {
  display: flex;
  justify-content: flex-start;
  align-items: center;
}
.kelan_index .news .news_content .news_nav .item {
  width: 185px;
  height: 40px;
  border: 1px solid #ddd;
  border-radius: 2px;
  margin-right: 6px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 18px;
  color: #404040;
  cursor: pointer;
}
.kelan_index .news .news_content .news_nav .active {
  background-color: #70b0f5;
  color: #fff;
  border: 1px solid #70b0f5;
}
.kelan_index .news .news_content .news_main {
  margin-top: 28px;
  width: 620px;
  display: none;
}
.kelan_index .news .news_content .news_main .item {
    padding-bottom: 25px;
    border-bottom: 1px dashed #808080;
    /* margin-top: 25px; */
    text-decoration: none;
    display: block;
    padding: 12px;
	
}
.kelan_index .news .news_content .news_main .item h3 {

  color: #404040;
  font-weight: 300;
  font-family: '黑体';
  cursor: pointer;
}
.kelan_index .news .news_content .news_main .item h3:hover {
  color: #70b0f5;
}
.kelan_index .news .news_content .news_main .item .news_desc {
  font-size: 11px;
  color: #999;
  margin-top: 10px;
}
.kelan_index .news .news_content .news_main .item .news_desc span {
  margin-right: 40px;
}
.kelan_index .news .news_content .news_main .item p {
  font-size: 11px;
  color: #404040;
  margin-top: 10px;
  color: #999;
line-height: 20px;
}
.kelan_index .news .news_content .news_more {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-top: 25px;
}
.kelan_index .news .news_content .news_more .item {
  width: 100px;
  height: 40px;
  border: 1px solid #ddd;
  border-radius: 2px;
  margin-right: 6px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 15px;
  color: #404040;
  cursor: pointer;
  text-decoration: none;
}
.kelan_index .news .news_content .news_more .item:hover {
  background-color: #70b0f5;
  color: #fff;
  border: 1px solid #70b0f5;
}
.product .product_nav {
  width: 100%;
  border-bottom: 1px solid #ddd;
}
.product .product_nav .nav_list {
  width: 1200px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin: 30px auto 0;
}
.product .product_nav .nav_list .item {
  color: #000000;
  font-size: 18px;
  font-family: "黑体";
  margin-right: 60px;
  cursor: pointer;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}
.product .product_nav .nav_list .item a {
  text-decoration: none;
}
.product .product_nav .nav_list .active {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.product .product_nav .nav_list .active a {
  color: #1568ff;
}
.product .product_nav .nav_list .item:last-child {
  margin-right: 0;
}
.product .product_nav .nav_list .item:hover {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.product .product_nav .nav_list .item:hover a {
  color: #1568ff;
}
.product .product_content {
  margin-top: 50px;
}
.product .product_content .content_list {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
}
.product .product_content .content_list .item {
  width: 382px;
  height: 306px;
  border: 1px solid #ddd;
  margin-right: 24px;
  margin-bottom: 24px;
  position: relative;
  cursor: pointer;
}
.product .product_content .content_list .item .img {
  width: 380px;
  height: 304px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}
.product .product_content .content_list .item .img img {
  width: 100%;
}
.product .product_content .content_list .item .jiao {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 20;
  display: none;
}
.product .product_content .content_list .item .txt {
  padding: 0 20px;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-direction: column;
}
.product .product_content .content_list .item .txt p {
  font-size: 16px;
}
.product .product_content .content_list .item .txt span {
  font-size: 11px;
  color: #999;
  padding: 5px 0;
}
.product .product_content .content_list .item .txt a {
  font-size: 12px;
  color: #70b0f5;
}
.product .product_content .content_list .item:nth-child(3n) {
  margin-right: 0;
}
.product .product_content .content_list .item:hover {
  border: 1px solid #70b0f5;
}
.product .product_content .content_list .item:hover .jiao {
  display: block;
}
.product .product_content .content_nav {
  border-top: 1px solid #ddd;
  margin-top: 40px;
}
.product .product_content .content_nav .nav_center {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.product .product_content .content_nav .nav_center img {
  width: 100%;
}
.product2 .product_nav {
  width: 100%;
  border-bottom: 1px solid #ddd;
}
.product2 .product_nav .nav_list {
  width: 1200px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin: 30px auto 0;
}
.product2 .product_nav .nav_list .item {
  color: #000000;
  font-size: 18px;
  font-family: "黑体";
  margin-right: 60px;
  cursor: pointer;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}
.product2 .product_nav .nav_list .item a {
  text-decoration: none;
}
.product2 .product_nav .nav_list .active {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.product2 .product_nav .nav_list .active a {
  color: #1568ff;
}
.product2 .product_nav .nav_list .item:last-child {
  margin-right: 0;
}
.product2 .product_nav .nav_list .item:hover {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.product2 .product_nav .nav_list .item:hover a {
  color: #1568ff;
}
.product2 .product_content {
  width: 100%;
  overflow: hidden;
}
.product2 .product_content .product_jr {
  margin-top: 50px;
  text-align: center;
  font-size: 18px;
  background: #fff;
  /* Center slide text vertically */
  display: -webkit-box;
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  -webkit-justify-content: flex-start;
  justify-content: flex-start;
  -webkit-box-align: center;
  -ms-flex-align: center;
  -webkit-align-items: center;
  align-items: center;
  overflow: hidden;
  transition: all 2s;
  position: relative;
  width: 1920px;
  left: 50%;
  transform: translate(-50%);
}
.product2 .product_content .product_jr .content_list {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
  width: 1920px;
  position: relative;
  left: 50%;
  transform: translate(-50%);
}
.product2 .product_content .product_jr .content_list img {
  max-width: 1920px;
  width: 1920px;
}
.product2 .product_content .product_jr .content_list .item {
  width: 382px;
  height: 306px;
  border: 1px solid #ddd;
  margin-right: 24px;
  margin-bottom: 24px;
  position: relative;
  cursor: pointer;
}
.product2 .product_content .product_jr .content_list .item .img {
  width: 380px;
  height: 304px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}
.product2 .product_content .product_jr .content_list .item .img img {
  width: 100%;
}
.product2 .product_content .product_jr .content_list .item .jiao {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 20;
  display: none;
}
.product2 .product_content .product_jr .content_list .item .txt {
  padding: 0 20px;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-direction: column;
}
.product2 .product_content .product_jr .content_list .item .txt p {
  font-size: 16px;
}
.product2 .product_content .product_jr .content_list .item .txt span {
  font-size: 11px;
  color: #999;
  padding: 5px 0;
}
.product2 .product_content .product_jr .content_list .item .txt a {
  font-size: 12px;
  color: #70b0f5;
}
.product2 .product_content .product_jr .content_list .item:nth-child(3n) {
  margin-right: 0;
}
.product2 .product_content .product_jr .content_list .item:hover {
  border: 1px solid #70b0f5;
}
.product2 .product_content .product_jr .content_list .item:hover .jiao {
  display: block;
}
.product2 .product_content .content_nav {
  border-top: 1px solid #ddd;
  margin-top: 40px;
}
.product2 .product_content .content_nav .nav_center {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.product3 .product_nav {
  width: 100%;
  border-bottom: 1px solid #ddd;
}
.product3 .product_nav .nav_list {
  width: 1200px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin: 30px auto 0;
}
.product3 .product_nav .nav_list .item {
  color: #000000;
  font-size: 18px;
  font-family: "黑体";
  margin-right: 60px;
  cursor: pointer;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}
.product3 .product_nav .nav_list .item a {
  text-decoration: none;
}
.product3 .product_nav .nav_list .active {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.product3 .product_nav .nav_list .active a {
  color: #1568ff;
}
.product3 .product_nav .nav_list .item:last-child {
  margin-right: 0;
}
.product3 .product_nav .nav_list .item:hover {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.product3 .product_nav .nav_list .item:hover a {
  color: #1568ff;
}
.product3 .product_content {
  margin-top: 50px;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}
.product3 .product_content img {
  width: 1920px;
}
.product3 .product_content .content_list {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
}
.product3 .product_content .content_list .item {
  width: 382px;
  height: 306px;
  border: 1px solid #ddd;
  margin-right: 24px;
  margin-bottom: 24px;
  position: relative;
  cursor: pointer;
}
.product3 .product_content .content_list .item .img {
  width: 380px;
  height: 304px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}
.product3 .product_content .content_list .item .img img {
  width: 100%;
}
.product3 .product_content .content_list .item .jiao {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 20;
  display: none;
}
.product3 .product_content .content_list .item .txt {
  padding: 0 20px;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-direction: column;
}
.product3 .product_content .content_list .item .txt p {
  font-size: 16px;
}
.product3 .product_content .content_list .item .txt span {
  font-size: 11px;
  color: #999;
  padding: 5px 0;
}
.product3 .product_content .content_list .item .txt a {
  font-size: 12px;
  color: #70b0f5;
}
.product3 .product_content .content_list .item:nth-child(3n) {
  margin-right: 0;
}
.product3 .product_content .content_list .item:hover {
  border: 1px solid #70b0f5;
}
.product3 .product_content .content_list .item:hover .jiao {
  display: block;
}
.product3 .product_content .content_nav {
  border-top: 1px solid #ddd;
  margin-top: 40px;
}
.product3 .product_content .content_nav .nav_center {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.product3 .product_content .content_nav .nav_center img {
  width: 100%;
}
.kelan_case .case_nav {
  width: 100%;
  border-bottom: 1px solid #ddd;
}
.kelan_case .case_nav .nav_list {
  width: 1200px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin: 30px auto 0;
}
.kelan_case .case_nav .nav_list .item {
  color: #000000;
  font-size: 18px;
  font-family: "黑体";
  margin-right: 60px;
  cursor: pointer;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}
.kelan_case .case_nav .nav_list .item a {
  text-decoration: none;
}
.kelan_case .case_nav .nav_list .active {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.kelan_case .case_nav .nav_list .active a {
  color: #1568ff;
}
.kelan_case .case_nav .nav_list .item:last-child {
  margin-right: 0;
}
.kelan_case .case_nav .nav_list .item:hover {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.kelan_case .case_nav .nav_list .item:hover a {
  color: #1568ff;
}
.kelan_case .case_content {
  margin-top: 50px;
}
.kelan_case .case_content .content_list {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
}
.kelan_case .case_content .content_list .item {
  width: 382px;
  height: 436px;
  border: 1px solid #ddd;
  margin-right: 24px;
  margin-bottom: 24px;
  padding: 30px;
  position: relative;
  cursor: pointer;
}
.kelan_case .case_content .content_list .item .img {
  width: 380px;
  height: 434px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_case .case_content .content_list .item .img img {
  width: 100%;
}
.kelan_case .case_content .content_list .item .jiao {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 20;
  display: none;
}
.kelan_case .case_content .content_list .item .txt {
  padding: 0 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  margin-top: 30px;
}
.kelan_case .case_content .content_list .item .txt p {
  font-size: 16px;
}
.kelan_case .case_content .content_list .item .txt span {
  font-size: 11px;
  color: #999;
  margin-top: 15px;
}
.kelan_case .case_content .content_list .item:nth-child(3n) {
  margin-right: 0;
}
.kelan_case .case_content .content_list .item:hover {
  border: 1px solid #70b0f5;
}
.kelan_case .case_content .content_list .item:hover .jiao {
  display: block;
}
.kelan_case .case_content .content_nav {
  border-top: 1px solid #ddd;
  margin-top: 40px;
}
.kelan_case .case_content .content_nav .nav_center {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.kelan_advantage .case_nav {
  width: 100%;
  border-bottom: 1px solid #ddd;
}
.kelan_advantage .case_nav .nav_list {
  width: 1200px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin: 30px auto 0;
}
.kelan_advantage .case_nav .nav_list .item {
  color: #000000;
  font-size: 18px;
  font-family: "黑体";
  margin-right: 60px;
  cursor: pointer;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}
.kelan_advantage .case_nav .nav_list .active {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.kelan_advantage .case_nav .nav_list .active a {
  color: #1568ff;
}
.kelan_advantage .case_nav .nav_list .item:last-child {
  margin-right: 0;
}
.kelan_advantage .case_nav .nav_list .item:hover {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.kelan_advantage .case_nav .nav_list .item:hover a {
  color: #1568ff;
}
.kelan_advantage .case_content {
  margin-top: 50px;
}
.kelan_advantage .case_content .content_list {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
}
.kelan_introduce .case_nav {
  width: 100%;
  border-bottom: 1px solid #ddd;
}
.kelan_introduce .case_nav .nav_list {
  width: 1200px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin: 30px auto 0;
}
.kelan_introduce .case_nav .nav_list .item {
  color: #000000;
  font-size: 18px;
  font-family: "黑体";
  margin-right: 60px;
  cursor: pointer;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}
.kelan_introduce .case_nav .nav_list .item a {
  text-decoration: none;
  color: #000000;
}
.kelan_introduce .case_nav .nav_list .active {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.kelan_introduce .case_nav .nav_list .active a {
  color: #1568ff;
}
.kelan_introduce .case_nav .nav_list .item:last-child {
  margin-right: 0;
}
.kelan_introduce .case_nav .nav_list .item:hover {
  color: #1568ff;
  border-bottom: 2px solid #1568ff;
}
.kelan_introduce .case_nav .nav_list .item:hover a {
  color: #1568ff;
}
.kelan_introduce .case_content {
  margin-top: 50px;
}
.kelan_introduce .case_content .content_list {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
}
.kelan_introduce .case_content .content_list .item {
  width: 380px;
  height: 340px;
  border: 1px solid #ddd;
  margin-right: 24px;
  margin-bottom: 24px;
  text-decoration: none;
  position: relative;
}
.kelan_introduce .case_content .content_list .item .img {
  width: 100%;
  height: calc(100%);
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_introduce .case_content .content_list .item .img img {
  width: 100%;
  height: 100%;
}
.kelan_introduce .case_content .content_list .item .jiao {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 20;
  display: none;
}
.kelan_introduce .case_content .content_list .item .txt {
  padding: 0 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  margin-top: 30px;
}
.kelan_introduce .case_content .content_list .item .txt p {
  font-size: 16px;
  text-decoration: none;
}
.kelan_introduce .case_content .content_list .item .txt span {
  font-size: 11px;
  color: #999;
  margin-top: 15px;
  text-decoration: none;
}
.kelan_introduce .case_content .content_list .item:nth-child(3n) {
  margin-right: 0;
}
.kelan_introduce .case_content .content_list .item:hover {
  border: 1px solid #70b0f5;
}
.kelan_introduce .case_content .content_list .item:hover .jiao {
  display: block;
}
.kelan_introduce .case_content .content_nav {
  border-top: 1px solid #ddd;
  margin-top: 40px;
}
.kelan_introduce .case_content .content_nav .nav_center {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
.kelan_contact .contact_us {
  width: 1200px;
  margin: 50px auto 0;
  height: 704px;
  box-shadow: 0 0 10px 0 rgba(0, 0, 0, 0.2);
  display: flex;
  justify-content: center;
  align-items: stretch;
}
.kelan_contact .contact_us .us_left {
  width: 552px;
  height: 704px;
  position: relative;
}
.kelan_contact .contact_us .us_left .us_left_content {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  padding: 52px 75px;
}
.kelan_contact .contact_us .us_left .us_left_content .content_list {
  margin-bottom: 50px;
}
.kelan_contact .contact_us .us_left .us_left_content .content_list .item {
  font-size: 16px;
  color: #ffffff;
  font-family: "黑体";
  margin-bottom: 15px;
}
.kelan_contact .contact_us .us_left .us_left_content .allmap {
  width: 100%;
  height: 230px;
  border-radius: 10px;
}
.kelan_contact .contact_us .us_right {
  flex-grow: 1;
  padding: 0 75px;
}
.kelan_contact .contact_us .us_right .us_title {
  font-size: 30px;
  color: #1e1e1e;
  height: 140px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_contact .contact_us .us_right .alist {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 20px;
}
.kelan_contact .contact_us .us_right .alist .item {
  width: 235px;
  margin-right: 20px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-direction: column;
}
.kelan_contact .contact_us .us_right .alist .item p {
  font-size: 17px;
  color: #1e1e1e;
}
.kelan_contact .contact_us .us_right .alist .item p span {
  color: #ff0000;
}
.kelan_contact .contact_us .us_right .alist .item input {
  width: 100%;
  height: 30px;
  margin-top: 4px;
  outline: none;
}
.kelan_contact .contact_us .us_right .blist {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin-bottom: 20px;
}
.kelan_contact .contact_us .us_right .blist .item {
  width: 490px;
  margin-right: 20px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-direction: column;
}
.kelan_contact .contact_us .us_right .blist .item p {
  font-size: 17px;
  color: #1e1e1e;
}
.kelan_contact .contact_us .us_right .blist .item p span {
  color: #ff0000;
}
.kelan_contact .contact_us .us_right .blist .item input {
  width: 100%;
  height: 30px;
  margin-top: 4px;
  outline: none;
}
.kelan_contact .contact_us .us_right .blist .item textarea {
  width: 100%;
  height: 85px;
  margin-top: 4px;
  outline: none;
}
.kelan_contact .contact_us .us_right .clist {
  margin-top: 90px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_contact .contact_us .us_right .clist input {
  width: 135px;
  height: 35px;
  background-color: #70b0f5;
  outline: none;
  border: 0;
  color: #fff;
}
.video_list .case_nav {
  width: 100%;
  border-bottom: 1px solid #ddd;
}
.video_list .case_nav .nav_list {
  width: 1200px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin: 30px auto 0;
}
.video_list .case_nav .nav_list .item {
  color: #000000;
  font-size: 18px;
  font-family: "黑体";
  margin-right: 60px;
  cursor: pointer;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}
.video_list .case_nav .nav_list .item a {
  text-decoration: none;
}
.video_list .case_nav .nav_list .active {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.video_list .case_nav .nav_list .active a {
  color: #1568ff;
}
.video_list .case_nav .nav_list .item:last-child {
  margin-right: 0;
}
.video_list .case_nav .nav_list .item:hover {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.video_list .case_nav .nav_list .item:hover a {
  color: #1568ff;
}
.video_list .video_content {
  margin-top: 50px;
}
.video_list .video_content .content_list {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
}
.video_list .video_content .content_list .item {
  position: relative;
  width: 380px;
  height: 260px;
  display: flex;
  justify-content: center;
  align-items: center;
  margin-right: 20px;
  margin-bottom: 10px;
}
.video_list .video_content .content_list .item .img {
  width: 100%;
  height: 100%;
}
.video_list .video_content .content_list .item .play_icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  cursor: pointer;
}
.video_list .video_content .content_list .item:nth-child(3n) {
  margin-right: 0;
}
.video_list .video_content .video_play {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #fff;
  z-index: 100;
  display: none;
}
.video_list .video_content .video_play .play_content {
  width: 100%;
  height: calc(100%);
  display: flex;
  justify-content: center;
  align-items: center;
}
.video_list .video_content .video_play .play_content .video_content {
  display: inline-block;
  height: calc(100%);
  position: relative;
}
.video_list .video_content .video_play .play_content .video_content video {
  height: calc(100%);
}
.video_list .video_content .video_play .play_content .video_content .play_head {
  width: calc(100% - 40px);
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 0 20px;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 100;
  color: #fff;
  height: 60px;
}
.video_list .video_content .video_play .play_content .video_content .play_head .ctitle {
  font-size: 14px;
  height: 30px;
  padding: 0 30px;
  border-radius: 20px;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.video_list .video_content .video_play .play_content .video_content .play_head .del {
  cursor: pointer;
  font-size: 14px;
  height: 30px;
  padding: 0 15px;
  border-radius: 20px;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  margin-left: 20px;
}
.video_list .video_content .video_play .play_content .video_content .play_head .del img {
  width: 30px;
  height: 30px;
  cursor: pointer;
}
.video_list .video_content .video_play .play_content .video_content .play_operation {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 60px;
  background-color: rgba(0, 0, 0, 0.45);
  display: flex;
  justify-content: flex-start;
  align-items: center;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .play,
.video_list .video_content .video_play .play_content .video_content .play_operation .stop {
  width: 60px;
  height: 60px;
  min-width: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .play img,
.video_list .video_content .video_play .play_content .video_content .play_operation .stop img {
  width: 45px;
  cursor: pointer;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .stop {
  display: none;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .time {
  color: #fff;
  font-size: 14px;
  min-width: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .progres {
  flex-grow: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .progres input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  border-radius: 10px;
  /*这个属性设置使填充进度条时的图形为圆角*/
  position: relative;
  z-index: 10;
  margin: 0;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .progres input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .progres input[type=range]:focus {
  outline: none;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .progres input[type=range]::-webkit-slider-runnable-track {
  height: 10px;
  background-color: #b2b2b2;
}
.video_list .video_content .video_play .play_content .video_content .play_operation .progres input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 5px;
  height: 10px;
  margin-top: 0;
  /*使滑块超出轨道部分的偏移量相等*/
  background: #009aef;
  border-radius: 0;
  /*外观设置为圆形*/
}
.kelan_news .case_nav {
  width: 100%;
  border-bottom: 1px solid #ddd;
}
.kelan_news .case_nav .nav_list {
  width: 1200px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  margin: 30px auto 0;
}
.kelan_news .case_nav .nav_list .item {
  color: #000000;
  font-size: 18px;
  font-family: "黑体";
  margin-right: 60px;
  cursor: pointer;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  text-decoration: none;
}
.kelan_news .case_nav .nav_list .item a {
  text-decoration: none;
}
.kelan_news .case_nav .nav_list .active {
  color: #1568ff;
  border-bottom: 2px solid #3e7afe;
}
.kelan_news .case_nav .nav_list .active a {
  color: #1568ff;
}
.kelan_news .case_nav .nav_list .item:last-child {
  margin-right: 0;
}
.kelan_news .case_nav .nav_list .item:hover {
  color: #1568ff;
  border-bottom: 2px solid #1568ff;
}
.kelan_news .case_nav .nav_list .item:hover a {
  color: #1568ff;
}
.kelan_news .news_content {
  margin-top: 50px;
}
.kelan_news .news_content .content_list {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
  flex-wrap: wrap;
}
.kelan_news .news_content .content_list .item {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
  cursor: pointer;
}
.kelan_news .news_content .content_list .item .img {
  width: 300px;
  height: 190px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
}
.kelan_news .news_content .content_list .item .img img {
  width: 100%;
}
.kelan_news .news_content .content_list .item .txt {
  width: 850px;
}
.kelan_news .news_content .content_list .item .txt .ctitle {
  font-size: 18px;
  color: #404040;
  font-family: "黑体";
  margin: 0;
}
.kelan_news .news_content .content_list .item .txt .ctime {
  font-size: 12px;
  font-family: "黑体";
  color: #999;
  line-height: 28px;
  margin-top: 5px;
}
.kelan_news .news_content .content_list .item .txt .ctime span {
  margin-right: 30px;
}
.kelan_news .news_content .content_list .item .txt .cdesc {
  font-size: 12px;
  font-family: "黑体";
  color: #999;
  line-height: 28px;
  margin-top: 5px;
}
.kelan_news .news_content .content_list .item .txt a {
  font-size: 12px;
  font-family: "黑体";
  color: #999;
  line-height: 28px;
  text-decoration: none;
  display: flex;
  cursor: pointer;
  margin-top: 15px;
}
.kelan_news .news_content .content_list .item .txt a:hover {
  color: #1568ff;
}
.kelan_news .news_content .content_nav {
  border-top: 1px solid #ddd;
  margin-top: 40px;
}
.kelan_news .news_content .content_nav .nav_center {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: flex-end;
  align-items: center;
}
@media screen and (max-width: 1920px) {


  .kelan_index .product .pro_content .item {
    width: calc(100% / 3);
    height: calc(100% / 2);
    background-color: #eeeff4;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    position: relative;
    cursor: pointer;
  }
  .kelan_index .product .pro_content .item img {
    width: 100%;
    height: 100%;
  }
  .kelan_index .product .pro_content .item p {
    font-size: 16px;
    color: #404040;
    margin-top: 5px;
  }
  .kelan_index .product .pro_content .item .mask {
    position: absolute;
    width: calc(100% - 60px);
    height: 100%;
    background-color: rgba(25, 101, 193, 0);
    padding: 0 30px;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    display: none;
    transition: all 1s;
  }
  .kelan_index .product .pro_content .item .mask p {
    font-size: 16px;
    color: #fff;
  }
  .kelan_index .product .pro_content .item .mask span {
    font-size: 16px;
    color: #fff;
    margin-top: 40px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    width: 100%;
  }
  .kelan_index .product .pro_content .item:hover .mask {
    display: flex;
  }
  .kelan_index .product .pro_nav {
     width: 120px;
      height: calc(127%/2);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    position: absolute;
    right: 0px;
	      z-index: 9999;
	  top: 14px;
  }
  .kelan_index .product .pro_nav .item {
    width: 100%;
    height: calc(100% /5);
    background-color: #a0a2a4;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    cursor: pointer;
  }
  .kelan_index .product .pro_nav .item img {
    width: 100%;
    height: 100%;
  }
  .kelan_index .product .pro_nav .item p {
    font-size: 16px;
    color: #f0f5fb;
    margin-top: 5px;
  }
  .kelan_index .product .pro_nav .item:last-child {
    border-bottom: 0;
  }
  .kelan_index .product .pro_nav .active {
    background: rgba(62, 129, 210, 1);
  }
}