* {
  padding: 0;
  margin: 0;
}

ul,
li {
  list-style: none;
}

a {
  text-decoration: none;
}

.center {
  width: 1200px;
  margin: 0 auto;
}

.banner {
  width: 100%;
  position: relative;
}

.header {
  /* background: hsla(0, 0%, 100%, .4); */
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(5px);
  background-clip: padding-box;
  width: calc(100% - 64px);
  padding-left: 32px;
  padding-right: 32px;
  height: 64px;
  position: fixed;
  left: 0;
  top: 0;
  cursor: pointer;
  transition: 0.5s all;
  z-index: 999;
}

.technical {
  width: 100%;
  height: 274px;
  background: #FBFCFF;
}

.technicalcen {
  height: 100%;
}

.technicalcen ul {
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.technicalcen ul li {
  text-align: center;
}

.technicalcen ul li img {
  width: 72px;
  margin-bottom: 4px;
}

.technicalcen ul li p {
  font-family: PingFangSC-Regular;
  font-size: 18px;
  color: #1E1E1E;
  letter-spacing: -0.04px;
  font-weight: 600;
}

.banner img {
  width: 100%;
  display: block;
}

.bannertxt {
  width: 1200px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.bannertxt h4 {
  font-family: PingFangSC-Medium;
  font-size: 44px;
  color: #000000;
  letter-spacing: -0.09px;
  font-weight: 500;
  text-align: left;
  margin-bottom: 20px;
}

.bannertxt p {
  font-family: PingFangSC-Regular;
  font-size: 16px;
  color: #000000;
  letter-spacing: -0.03px;
  font-weight: 400;
  text-align: left;
  margin-left: 4px;
}

.banner video {
  width: 100%;
  display: block;
}


.device {
  width: 100%;
  height: 1323px;
  background-image: linear-gradient(90deg, rgba(220, 233, 255, 0.1) 0%, rgba(220, 233, 255, 0.4) 100%);
}

.devicecen h2 {
  font-family: PingFangSC-Regular;
  font-size: 40px;
  color: #1E1E1E;
  letter-spacing: -0.08px;
  font-weight: 400;
  text-align: center;
  padding-top: 80px;
  margin-bottom: 12px;
}

.devicecen p {
  font-family: PingFangSC-Regular;
  font-size: 18px;
  color: #5E636A;
  letter-spacing: -0.04px;
  font-weight: 400;
  text-align: center;
  margin-bottom: 34px;
}

.devicecen ul {
  width: 100%;
  display: flex;
  /* opacity: 0; */
  display: grid;
  justify-content: space-between;
  grid-template-columns: repeat(auto-fill, 285px);
}

.devicecen ul li {
  width: 285px;
  height: 318px;
  background: #F3F8FF;
  margin-bottom: 21px;
  box-shadow: 0px 2px 24px 0px rgba(230, 235, 243, 1);
  transition: 1s all;
  cursor: pointer;
}

.devicecen ul li:hover img {
  transform: scale(1.1);
}

.devicecen ul li img {
  width: 100%;
  transition: 0.5s all;
}

.modelecosystem {
  width: 100%;
  height: 720px;
  background-image: linear-gradient(90deg, rgba(220, 233, 255, 0.1) 0%, rgba(220, 233, 255, 0.4) 100%);
}

.modelecosystem h2 {
  font-family: PingFangSC-Regular;
  font-size: 40px;
  color: #1E1E1E;
  letter-spacing: -0.08px;
  font-weight: 400;
  text-align: center;
  padding-top: 88px;
  margin-bottom: 12px
}

.modelecosystem p {
  font-family: PingFangSC-Regular;
  font-size: 18px;
  color: #5E636A;
  letter-spacing: -0.04px;
  font-weight: 400;
  text-align: center;
  margin-bottom: 44px;
}

.modelecosystem_main {
  display: flex;
  margin-top: 60px;
}

.modelecosystem_item {
  width: 285px;
  height: 315px;
  background: #F4F8FE;
  box-shadow: 0px 2px 24px 0px rgba(230, 235, 243, 1);
  border-radius: 8px;
  margin-right: 20px;
  text-align: center;
  cursor: pointer;
}

.modelecosystem_item:hover{
  transform: scale(1.05);
  transition: 0.5s all;
}

.modelecosystem_item img {
  width: 140px;
  margin-top: 60px;
}

.modelecosystem_item p {
  text-align: center;
  margin-top: 16px;
  font-size: 18px;
  color: #696F7A;
  letter-spacing: -0.04px;
  font-weight: 400;
}

/* .modelecosystem_item:hover{

} */

.developingapis {
  width: 100%;
  height: 920px;
  background-image: linear-gradient(90deg, rgba(220, 233, 255, 0.4) 0%, rgba(220, 233, 255, 0.1) 100%);
}

.developingapis h2 {
  font-family: PingFangSC-Regular;
  font-size: 40px;
  color: #1E1E1E;
  letter-spacing: -0.08px;
  font-weight: 400;
  text-align: center;
  padding-top: 88px;
  margin-bottom: 36px
}

.developingapis p {
  font-family: PingFangSC-Regular;
  font-size: 18px;
  color: #5E636A;
  letter-spacing: -0.04px;
  font-weight: 400;
  text-align: left;
  margin-bottom: 44px;
}

.developingapiscen img {
  width: 100%;
  height: 490px;
}

.seekadvicefrom {
  width: 100%;
  height: 100px;
  padding-top: 60px;
  background: url("https://expo.3g2.cn/expo3dstore/images/abseekadvicefrom.png") no-repeat;
  background-size: 100% 100%;
  clear: both;
}

.seekadvicefrombtn {
  width: 120px;
  height: 44px;
  background-size: 100% 100%;
  background-image: linear-gradient(230deg, #3ECBFF 0%, #7282FF 50%, #CF6FFF 100%);
  border-radius: 4px;
  color: #fff;
  text-align: center;
  line-height: 44px;
  cursor: pointer;
  margin: 0px auto;
  font-family: PingFangSC-Regular;
}

.black li a {
  color: #000000 !important;
  font-weight: normal !important;
}

.msg h5 {
  color: #000000 !important;
  background: url(https://expo.3g2.cn/expo3dstore/images/p_b.png) no-repeat !important;
  background-size: 16px 16px !important;
  background-position: left 24px !important;
  font-weight: normal !important;
}

.msg span {
  color: #000000 !important;
  font-weight: normal !important;
}

.msg h6 {
  color: #000000 !important;
  font-weight: normal !important;
}

.msg h6 a {
  color: #000000 !important;
}