* {
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: Microsoft YaHei;
  text-decoration: none;
  letter-spacing: 0.75px;
  font-weight: 400;
}
body {
  background: #fff;
}
.banner {
  width: 100%;
  height: 627px;
  position: relative;
  background: #2560b3 url('/images/frontend/img/product/banner.jpg') center center/ cover no-repeat;
}
.banner .desc_box{
  position: absolute;
  left: 12%;
  top:35%;
  display: flex;
  flex-direction: column;
  color: #fff;
}
.banner .desc_box b{
  font-size: 45px;
  padding-bottom: 30px;
}
.banner .desc_box span{
  font-size: 24px;
  letter-spacing: 2.5px;
  text-align: center;
}
section .preponderance {
  margin-bottom: 59px;
}
section .preponderance .center h3 {
  font-size: 28px;
  color: #2E2E2E;
  text-align: center;
  letter-spacing: 1px;
  margin-top: 60px;
}
section .preponderance .center > p {
  font-size: 16px;
  color: #2E2E2E;
  text-align: center;
  letter-spacing: 0.75px;
  line-height: 26px;
  margin: 16px auto;
  margin-bottom: 49px;
}
section .preponderance .center ul {
  justify-content: space-between;
  margin: auto;
}
section .preponderance .center ul li div {
  height: 170px;
  background: rgba(255, 255, 255, 1);
  margin-right: 20px;
  margin-bottom: 20px;
  display: flex;
  justify-content: space-around;
}
section .preponderance .center ul li p:first-child span {
  display: block;
  height: 72px;
  margin: 30px 0px 10px 0px;
  background-repeat: no-repeat;
  background-position: center top;
  text-align: center;
}
section .preponderance .center .frist li:first-of-type p:first-child span {
  background-image: url(/images/frontend/img/product/uwbL.png);
}
section .preponderance .center .frist li:nth-of-type(2) p:first-child span {
  background-image: url(/images/frontend/img/product/bluetoothL.png);
}
section .preponderance .center .frist li:nth-of-type(3) p:first-child span {
  background-image: url(/images/frontend/img/product/indoorL.png);
}
section .preponderance .center .frist li:nth-of-type(4) p:first-child span {
  background-image: url(/images/frontend/img/product/satelliteL.png);
}
section .preponderance .center .frist li:nth-of-type(5) p:first-child span {
  background-image: url(/images/frontend/img/product/three-dimensionalL.png);
}
section .preponderance .center .frist li:nth-of-type(6) p:first-child span {
  background-image: url(/images/frontend/img/product/openL.png);
}
section .preponderance .center .frist li:nth-of-type(7) p:first-child span {
  background-image: url(/images/frontend/img/product/constructionL.png);
}
section .preponderance .center .frist li:nth-of-type(8) p:first-child span {
  background-image: url(/images/frontend/img/product/intelligentL.png);
}
section .preponderance .center ul li p:first-child {
  font-size: 16px;
  color: rgba(46, 46, 46, 1);
  text-align: center;
  line-height: 24px;
  /* width: 46%; */
  min-width: 105px;
}
section .preponderance .center ul li p:nth-of-type(2) {
  height: 130px;
  background: rgba(226, 226, 226, 1);
  margin-top: 20px;
  margin-right: 10px;
  border-right: 1px solid rgba(226, 226, 226, 1);
}
section .preponderance .center ul li p:last-child {
  font-size: 14px;
  color: rgba(102, 102, 102, 1);
  margin: 20px 0px 20px 0px;
  letter-spacing: 0.2px;
  line-height: 25px;
  min-width: 150px;
}
section .Oli {
  background: url(/images/frontend/img/product/oilBgL.png) center center no-repeat;
}
section .Oli .width {
  height: 776px;
  position: relative;
}
section .Oli .postion {
  position: absolute;
  top: 182px;
  left: 0px;
}
section .Oli .rectangleBg {
  margin-bottom: 114px;
  width: 709px;
  background-image: url(/images/frontend/img/product/rectangleL.png);
}
section .Oli .rectangleBg h3 {
  font-size: 40px;
  color: rgba(0, 0, 0, 1);
  height: 73px;
  text-align: center;
  line-height: 73px;
  margin-top: 0px;
  margin-bottom: 0px;
}
section .Oli .rectangleBg p {
  font-size: 30px;
  color: rgba(0, 0, 0, 1);
  height: 73px;
  line-height: 73px;
  text-align: center;
  letter-spacing: 1.2px;
}
section .Oli .postion > p {
  font-size: 30px;
  color: rgba(255, 255, 255, 1);
  margin-bottom: 41px;
}
section .Oli .postion ul {
  display: flex;
}
section .Oli .postion ul li {
  margin-right: 20px;
}
section .Oli .postion ul li span:first-of-type {
  width: 52px;
  height: 52px;
  background: rgba(255, 255, 255, 1);
  border-radius: 50%;
  display: block;
  background-repeat: no-repeat;
  background-position: center center;
  margin-bottom: 10px;
}
section .Oli .postion ul li span:last-of-type {
  font-size: 16px;
  color: rgba(20, 20, 20, 1);
  display: block;
  min-width: 70px;
}
section .Oli .postion ul li:first-of-type span:first-of-type {
  background-image: url(/images/frontend/img/product/wirelessL.png);
}
section .Oli .postion ul li:nth-of-type(2) span:first-of-type {
  background-image: url(/images/frontend/img/product/powerL.png);
}
section .Oli .postion ul li:nth-of-type(3) span:first-of-type {
  background-image: url(/images/frontend/img/product/batteryL.png);
}
section .Oli .postion ul li:nth-of-type(4) span:first-of-type {
  background-image: url(/images/frontend/img/product/costL.png);
}
section .Oli .postion ul li:nth-of-type(5) span:first-of-type {
  background-image: url(/images/frontend/img/product/disturbL.png);
}
section .Oli .postion ul li:nth-of-type(6) span:first-of-type {
  background-image: url(/images/frontend/img/product/anti-explosionL.png);
}
section .Oli .postion ul li:nth-of-type(7) span:first-of-type {
  background-image: url(/images/frontend/img/product/roadworkL.png);
}
section .Oli .postion ul li:nth-of-type(8) span:first-of-type {
  background-image: url(/images/frontend/img/product/maintainL.png);
}
section .bgp {
  background: rgba(255, 255, 255, 1);
}
section .bgp .width {
  position: relative;
  width: 70%;
  margin:0 auto;
}
section .bgp .width .frist li {
  display: flex;
  margin-bottom: 30px;
}
section .bgp .width .frist li img {
  width: 40px;
  height: 40px;
}
section .bgp .width .frist li div p:first-of-type {
  font-size: 30px;
  color: rgba(86, 86, 86, 1);
  letter-spacing: -0.25px;
  margin-left: 18px;
  margin-bottom: 10px;
}
section .bgp .width .frist li div p:last-of-type {
  font-size: 18px;
  color: rgba(136, 143, 147, 1);
  margin-left: 18px;
  margin-bottom: 20px;
}
section .bgp .width .frist li div span {
  height: 1px;
  background: rgba(229, 241, 245, 1);
  display: block;
}
section .bgp .width .position {
  position: relative;
  top: 120px;
  left: 106px;
}
section .bgp .width .position > a {
  width: 217px;
  height: 47px;
  background: rgba(255, 153, 0, 1);
  border-radius: 2px;
  display: inline-block;
  font-size: 15px;
  color: rgba(5, 19, 38, 1);
  text-align: center;
  line-height: 47px;
  margin-top: 68px;
  margin-left: 30px;
}
section .bgp .width .showBg {
  background: url(/images/frontend/img/product/showBgL.png) 100% 100% no-repeat;
  height: 593px;
  position: relative;
  margin: 55px auto 70px;
}
section .bgp .width .showBg ul li span {
  width: 11px;
  height: 11px;
  background: rgba(255, 153, 0, 1);
  border: 1px solid rgba(255, 90, NaN, 1);
  border-radius: 50%;
  display: inline-block;
  margin-right: 5px;
}
section .bgp .width .showBg ul li {
  max-width: 225px;
  margin-bottom:7px;
  color: rgba(0, 0, 0, 1);
  line-height: 1.3;
  font-size: 16px;
  letter-spacing: 2px;
}
section .bgp .width .showBg ul:first-of-type {
  position: absolute;
  left: 52px;
  top: 180px;
}
section .bgp .width .showBg ul:nth-of-type(2) {
  position: absolute;
  left: 528px;
  top: 26px;
}
section .bgp .width .showBg ul:nth-of-type(2) li{
  margin-bottom: 16px;
}
section .bgp .width .showBg ul:nth-of-type(3) {
  position: absolute;
  left: 665px;
  top: 250px;
}
section .bgp .width .showBg ul:nth-of-type(3) li{
  margin-bottom: 16px;
}
.distance {
  width: 1280px;
  padding: 0px;
}
@media (max-width: 1700px) {
  section .bgp .width{
    width: 83%;
  }
  section .bgp .width .showBg ul{
    display: none;
  }
  section .bgp .width .showBg {
    height: 610px;
    top: 0px;
    background: url(/images/frontend/img/product/showBgS.png) center center/100% no-repeat;
  }
  section .bgp .width .showBg ul li {
    font-size: 10px;
    margin-bottom: 0px;
    line-height: 14px;
  }
}
@media (max-width: 1500px) {
  section .bgp .width{
    width: 95%;
  }
  .banner .desc_box b{
    font-size: 32px;
  }
  .banner .desc_box span{
    font-size: 18px;
  }
}
@media (max-width: 1200px) {
  section .bgp .width{
    width: 100%;
  }
  section .bgp .width .showBg{
    background:url(/images/frontend/img/product/showBgS.png) center center/80% no-repeat
  }
  .center-align {
    width: 84%;
    margin: auto;
  }
}
@media (max-width: 1170px) {
  .distance {
    width: auto;
    padding: 0 15px;
  }
}
@media (max-width: 1024px) {
  section .Oli .postion {
    left: 5%;
  }
  section .bgp .width .frist li div p:first-of-type {
    font-size: 25px;
  }
  section .bgp .width .frist li div p:last-of-type {
    font-size: 16px;
  }
  
}
@media (max-width: 991px) {
  .banner .desc_box b{
    font-size: 28px;
    padding-bottom: 10px;
  }
  .banner .desc_box span{
    font-size: 16px;
  }
  section .preponderance .center ul {
    display: block;
    width: 100%;
    margin: auto;
  }
  section .preponderance .center ul li:nth-child(even) {
    margin-right: 0px;
  }
  section .Oli {
    margin-top: 50px;
    padding-left: 20px;
    height: 100%;
    padding-bottom: 90px;
  }
  section .Oli .postion {
    position: relative;
    top: 52px;
    left: 0px;
  }
  section .Oli .width {
    height: auto;
  }
  section .Oli .rectangleBg {
    margin-bottom: 50px;
  }
  .b-list {
    padding-top: 220px;
  }
  section .bgp{
    padding-top: 10px;
  }
  section .bgp .width {
    height: auto;
  }
  section .bgp .width .showBg{
    width: 100%;
    height: 593px;
    background: url(/images/frontend/img/product/showBgS.png) center center/92% no-repeat;
    margin: 0 auto 30px;
  }
  section .bgp .width .position > a {
    margin: 23px auto 40px;
    display: block;
  }
  section .Oli .rectangleBg {
    margin-bottom: 114px;
    background-image: url(/images/frontend/img/product/rectangleL.png);
  }
  section .Oli .postion {
    width: 80%;
    position: relative;
    top: 52px;
    left: 0px;
    margin: auto;
  }
  section .Oli .rectangleBg {
    width: 100%;
  }
  section .Oli .postion ul {
    width: 100%;
    display: flex;
  }
  section .Oli .rectangleBg {
    background: url(/images/frontend/img/product/rectangleL.png) top center/100% no-repeat;
    margin-bottom: 74px;
  }
  section .Oli .rectangleBg h3 {
    font-size: 24px;
    height: 32px;
    line-height: 32px;
  }
  section .Oli .rectangleBg p {
    font-size: 21px;
    height: 63px;
    line-height: 63px;
  }
  section .Oli .postion > p {
    font-size: 18px;
    color: rgba(255, 255, 255, 1);
    margin-bottom: 41px;
  }
  section .Oli .postion ul li span:first-of-type {
    width: 42px;
    height: 42px;
    background-color: rgba(255, 255, 255, 1);
    border-radius: 50%;
    background-position: center center;
    background-repeat: no-repeat;
    margin-bottom: 10px;
    background-size: 64%;
  }
  section .Oli .postion ul li span:last-of-type {
    display: block;
    font-size: 12px;
    width: 55px;
    min-width: 0px;
  }
  section .Oli .postion ul li {
    margin-right: 20px;
  }
  section .bgp .width .position {
    position: relative;
    bottom: 70%;
    left: 0;
    top: 0;
    width: 90%;
    margin: auto;
  }
  section .bgp .width {
    align-items: flex-end;
  }
  ul.frist {
    display: flex;
    width: 100%;
    justify-content: space-between;
    padding-left: 20px;
  }
  section .bgp .width .frist li div {
    margin-right: 5px;
  }
  section .bgp .width .frist li div p:first-of-type {
    font-size: 16px;
    margin-left: 14px;
  }
  section .bgp .width .frist li div p:last-of-type {
    font-size: 14px;
    margin-left: 14px;
  }
  section .bgp .width .frist li img {
    width: 32px;
    height: 32px;
  }
  .more {
    display: block;
    padding: 5px 35px;
    width: 5%;
    border: 1px rgb(86, 82, 94) solid;
    border-radius: 20px;
    color: rgb(165, 162, 167);
    margin: auto;
    margin-top: 30px;
  }
}
@media (max-width: 600px) {
  .banner .desc_box{
    left: 10px;
  }
  .banner .desc_box b{
    font-size: 22px;
  }
  .banner .desc_box span{
    font-size: 14px;
  }
  section .preponderance .center ul li{
    width: 100%;
  }
  section .preponderance .center ul li div{
    margin-right:0;
    height: auto;
  }
  section .preponderance .center ul li p:last-child{
    width: 50%;
  }
  section .bgp .width .showBg{
    height:400px;
  }
}
@media (max-width:520px) {
  .banner{
    height: 190px;
  }
  .banner .desc_box b{
    font-size: 18px;
  }
  .banner .desc_box span{
    font-size: 12px;
  }
  section .preponderance .center h3 {
    font-size: 18px;
    margin-top: 50px;
    margin-left: 15px;
    margin-right: 15px;
  }
  section .Oli .rectangleBg h3 {
    font-size: 18px;
    height: 53px;
    line-height: 53px;
  }
  section .Oli .rectangleBg p {
    font-size: 16px;
  }
  section .Oli .postion > p {
    font-size: 16px;
    line-height: 1.8;
    text-align: center;
  }
}
@media (max-width: 470px) {
  section .preponderance .center > p {
    font-size: 14px;
    padding-right: 15px;
    padding-left: 15px;
    margin-bottom: 30px;
  }
  section .preponderance .center ul {
    width: auto;
  }
  section .Oli {
    padding-left: 0px;
  }
  ul.frist {
    padding-left: 0px;
    margin: auto;
    width: 100%;
  }
  section .bgp .width .frist li div {
    margin-right: 0px;
  }
  section .Oli .postion {
    width: auto;
  }
  section .Oli .rectangleBg {
    background: url(/images/frontend/img/product/rectangleL.png) top center/cover no-repeat;
    margin-bottom: 54px;
  }
  section .Oli .postion ul {
    display: block;
    margin-left: 0px;
    max-width: 318px;
    margin: auto;
  }
  section .Oli .postion ul li {
    display: inline-block;
    margin-right: 10px;
    margin-left: 10px;
    margin-bottom: 10px;
  }
  section .Oli .postion ul li span:first-of-type {
    margin: auto;
    margin-bottom: 10px;
  }
  section .Oli .postion ul li span:last-of-type {
    text-align: center;
    color: #fff;
  }
  section .bgp .width .position {
    left: 0%;
    width: 100%;
  }
  section .preponderance .center ul li p:first-child span {
    display: block;
    height: 65px;
    margin: 20px 0px 8px 0px;
    background-position: center center;
    background-size: contain;
  }
  section .preponderance .center ul li p:first-child {
    font-size: 12px;
    color: rgba(46, 46, 46, 1);
    line-height: 20px;
    width: 60%;
  }
  section .preponderance .center ul li div {
    display: flex;
    border-bottom: 1px rgb(243, 243, 243) solid;
    margin-right: 0px;
    margin-bottom: 0px;
  }
  section .bgp .width .position > a {
    width: 137px;
    height: 37px;
    display: block;
    font-size: 12px;
    line-height: 37px;
    margin-left: 0px;
    margin: 0 auto 13px;
  }
  section .bgp .width .frist li div p:first-of-type {
    margin-bottom: 5px;
    font-size: 12px;
    margin-left: 5px;
    max-height: 34px;
    margin-right: 2px;
  }
  section .bgp .width .frist li div p:last-of-type {
    font-size: 11px;
    margin-left: 5px;
  }
  section .bgp .width .position {
    top: 0px;
  }
  .more {
    width: 35px;
    margin-top: 10px;
  }
  .center-align {
    width: 100%;
  }
  section .bgp .width .frist li {
    margin-right: 5px;
    border-right: 1px #ebecec solid;
    padding-top: 5px;
  }
  section .bgp .width .frist li:last-of-type {
    margin-right: 0px;
    border-right: none;
  }
  section .bgp .width .frist li div span{
    display: none;
  }
  section .bgp .width .frist li{
    margin-bottom: 16px;
  }
  section .bgp .width .frist li div p:last-of-type{
    margin-bottom: 12px;
  }
}
@media (max-width: 380px) {
  .banner .desc_box b{
    font-size: 16px;
  }
  .banner .desc_box span{
    font-size: 11px;
  }
}
@media (max-width: 320px) {
  ul.frist {
    padding-left: 10px;
  }
  section .Oli .rectangleBg h3 {
    font-size: 16px;
  }
  section .Oli .rectangleBg p {
    font-size: 14px;
  }
  section .Oli .postion ul {
    max-width: 280px;
  }
  section .Oli .postion ul li {
    margin-right: 5px;
    margin-left: 5px;
  }
}
.one,
.two,
.three {
  display: none;
}
.show111 {
  display: block !important;
}
.hide111 {
  display: none !important;
}