.banc {
  background-image: url('/guide/image/IOTExhibition/bg.png');
  width: 100%;
  height: 5380px;
  background-repeat: no-repeat;
  position: relative;
  background-size: cover;
  background-position: center;
}
.banc .video-shade {
  background: rgba(0, 0, 0, 0.5);
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  width: 100vw;
  z-index: 10000;
  display: none;
}
.banc .video-shade .img {
  position: fixed;
  width: 960px;
  height: 540px;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  margin: auto;
  transition: all 0.3s ease-in;
}
.banc .video-shade .img img {
  width: 100%;
  height: auto;
  border: none;
}
.banc .video-shade .img .close-img {
  position: absolute;
  right: 0;
  top: -50px;
  width: 40px;
  height: 40px;
  cursor: pointer;
  z-index: 10000;
}
.banc .btn {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 40%;
  margin: auto;
}
.banc .btn .free-btn {
  width: 160px;
  height: 36px;
  line-height: 36px;
  text-align: center;
  background: #ff9e00;
  border: none;
  border-radius: 18px;
  color: #fff;
  margin: 4% 2%;
  cursor: pointer;
  font-size: 16px;
}
.banc .btn .free-btn:hover {
  color: #fff;
}
.banc .btn .demo-btn {
  width: 160px;
  height: 36px;
  background: #fff;
  border: 1px solid #ff9e00;
  border-radius: 18px;
  color: #ff9e00;
  margin: 4% 2%;
  cursor: pointer;
  font-size: 16px;
  line-height: 36px;
}
.banc .btn .demo-btn:hover {
  color: #ff9e00;
}
.banc .btn .special-btn {
  width: 220px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  background: #ff9e00;
  border: none;
  border-radius: 18px;
  color: #fff;
  margin: 4% 2%;
  cursor: pointer;
  font-size: 16px;
}
.banc .btn .special-btn:hover {
  color: #fff;
}
.banc .section1 {
  display: flex;
  justify-content: center;
  position: relative;
  top: 2.2%;
  margin: auto;
  align-items: center;
  flex-direction: column;
}
.banc .section1 img {
  width: 35.7%;
}
.banc .section1 .btn {
  margin-top: -0.8%;
}
.banc .section2 {
  max-width: 1450px;
  margin: auto;
  top: 10.6%;
  position: relative;
}
.banc .section2 .title {
  font-size: 36px;
  font-weight: 600;
  color: #181A39;
  line-height: 46px;
  text-align: center;
  margin-bottom: 42px;
}
.banc .section2 .text1 {
  font-size: 18px;
  font-weight: 400;
  color: #181A39;
  line-height: 26px;
  text-align: center;
  margin-bottom: 20px;
}
.banc .section2 .text2 {
  font-size: 18px;
  font-weight: 400;
  color: #181A39;
  line-height: 26px;
  text-align: center;
  margin-bottom: 60px;
}
.banc .section2 .shows {
  display: flex;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto 2%;
}
.banc .section2 .shows div {
  width: 33%;
}
.banc .section2 .shows div img {
  cursor: pointer;
  width: 100%;
  height: auto;
}
.banc .section2 .btn {
  margin-top: -40px;
}
.banc .section3 {
  max-width: 1280px;
  margin: auto;
  position: relative;
  top: 11.6%;
}
.banc .section3 .title {
  font-size: 36px;
  font-weight: 400;
  color: #181A39;
  line-height: 46px;
  text-align: center;
  margin-bottom: 70px;
}
.banc .section3 .line {
  position: absolute;
  left: 4%;
  z-index: 10;
  top: 10%;
}
.banc .section3 .part1 {
  display: flex;
  flex-direction: column;
  margin-top: -13%;
}
.banc .section3 .part1 div {
  margin-bottom: 10px;
  position: relative;
}
.banc .section3 .part1 div .title {
  width: 210px;
  height: 44px;
  background: #FF9E00;
  border-radius: 5px 5px 20px 5px;
  font-size: 20px;
  font-weight: 500;
  color: #FFFFFF;
  line-height: 44px;
  position: relative;
  text-align: center;
}
.banc .section3 .part1 div .des {
  font-size: 20px;
  font-weight: 600;
  color: #181A39;
  line-height: 26px;
  position: relative;
  text-align: left;
}
.banc .section3 .part1 div .text {
  font-size: 16px;
  font-weight: 400;
  color: #181A39;
  line-height: 45px;
  position: relative;
  text-align: left;
}
.banc .section3 .part1 div img {
  width: 100%;
}
.banc .section3 .part1 .div1 {
  height: 260px;
}
.banc .section3 .part1 .div1 .title {
  top: 81.3%;
  left: 6.6%;
}
.banc .section3 .part1 .div1 .des {
  top: 65%;
  left: 9.8%;
}
.banc .section3 .part1 .div1 .text {
  top: 71%;
  left: 9.8%;
}
.banc .section3 .part1 .div2 {
  height: 380px;
  margin-bottom: 31px;
  margin-top: -96px;
}
.banc .section3 .part1 .div2 .title {
  top: 79%;
  left: 6.6%;
}
.banc .section3 .part1 .div2 .des {
  top: 68%;
  left: 9.8%;
}
.banc .section3 .part1 .div2 .text {
  top: 74%;
  left: 9.8%;
}
.banc .section3 .part1 .div3 {
  height: 330px;
}
.banc .section3 .part1 .div3 .title {
  top: 78%;
  left: 6.6%;
}
.banc .section3 .part1 .div3 .des {
  top: 64.5%;
  left: 9.8%;
}
.banc .section3 .part1 .div3 .text {
  top: 70%;
  left: 9.8%;
}
.banc .section3 .part2 {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  margin-top: 18%;
}
.banc .section3 .part2 div {
  margin: 2.7% auto;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}
.banc .section3 .part2 div img {
  width: 542px;
  height: auto;
  z-index: 3;
}
.banc .section3 .part2 div .desc {
  background-color: #fff;
  height: 340px;
  width: 600px;
  z-index: 2;
  margin-top: -25%;
  border-radius: 15px;
}
.banc .section3 .part2 div .desc .title {
  font-size: 20px;
  font-weight: 500;
  color: #181A39;
  line-height: 26px;
  position: relative;
  text-align: justify;
  top: 31%;
  width: 100%;
  left: 5%;
}
.banc .section3 .part2 div .desc .text {
  font-size: 16px;
  font-weight: 400;
  color: #6B707A;
  line-height: 26px;
  max-width: 480px;
  position: relative;
  text-align: justify;
  top: 14%;
  left: -5%;
}
.banc .section3 .part2 .uniqueDiv .desc .title {
  top: 27%;
}
.banc .section3 .part2 .uniqueDiv .desc .text {
  top: 10%;
}
.banc .section3 .btn {
  margin-top: -2%;
}
.banc .section4 {
  max-width: 1280px;
  margin: auto;
  position: relative;
  top: 13%;
}
.banc .section4 .title {
  font-size: 36px;
  font-weight: 400;
  color: #181A39;
  line-height: 46px;
  text-align: center;
  margin-bottom: 80px;
}
.banc .section4 .info {
  display: flex;
  flex-direction: column;
  margin-top: -6%;
}
.banc .section4 .info div {
  margin-bottom: 5px;
  height: 270px;
}
.banc .section4 .info div .des {
  font-size: 20px;
  font-weight: 600;
  color: #181A39;
  line-height: 26px;
  position: relative;
  top: 47%;
  left: 9.8%;
  text-align: left;
}
.banc .section4 .info div .des::after {
  position: absolute;
  left: 0%;
  top: 165%;
  content: "";
  width: 40px;
  height: 2px;
  background: #ff8000;
  border-radius: 1px;
}
.banc .section4 .info div .text {
  font-size: 16px;
  font-weight: 400;
  color: #181A39;
  line-height: 26px;
  position: relative;
  top: 59%;
  left: 9.8%;
  text-align: left;
}
.banc .section4 .info div img {
  width: 100%;
}
.banc .section5 {
  max-width: 1280px;
  margin: auto;
  position: relative;
  top: 14%;
}
.banc .section5 .title {
  margin: 54px auto 85px;
  font-size: 36px;
  font-weight: 400;
  color: #181A39;
  line-height: 46px;
  text-align: center;
  margin-bottom: 85px;
}
.banc .section5 div img {
  width: 100%;
}
@media only screen and (max-width: 1560px) {
  .banc {
    height: 5380px;
  }
  .banc .btn {
    width: 40%;
  }
  .banc .btn .free-btn {
    width: 160px;
    height: 36px;
    line-height: 36px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .btn .demo-btn {
    width: 160px;
    height: 36px;
    margin: 4% 2%;
    font-size: 16px;
    line-height: 36px;
  }
  .banc .btn .special-btn {
    width: 220px;
    height: 40px;
    line-height: 40px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .section1 {
    top: 2.2%;
  }
  .banc .section1 img {
    width: 42.7%;
  }
  .banc .section2 {
    max-width: 1200px;
    top: 10%;
  }
  .banc .section2 .title {
    font-size: 36px;
    line-height: 46px;
    margin-bottom: 42px;
  }
  .banc .section2 .text1 {
    font-size: 18px;
    line-height: 26px;
    margin-bottom: 20px;
  }
  .banc .section2 .text2 {
    font-size: 18px;
    line-height: 26px;
    margin-bottom: 70px;
  }
  .banc .section2 .shows {
    display: flex;
    justify-content: space-between;
  }
  .banc .section2 .shows div {
    width: 33.3%;
  }
  .banc .section2 .shows div img {
    width: 100%;
  }
  .banc .section2 .btn {
    margin-top: -40px;
  }
  .banc .section3 {
    max-width: 1280px;
    top: 12%;
  }
  .banc .section3 .title {
    font-size: 36px;
    line-height: 46px;
    margin-bottom: 63px;
  }
  .banc .section3 .line {
    left: 4%;
    top: 11%;
  }
  .banc .section3 .part1 {
    margin-top: -14%;
  }
  .banc .section3 .part1 div {
    margin-bottom: 10px;
  }
  .banc .section3 .part1 div .title {
    width: 210px;
    height: 44px;
    border-radius: 5px 5px 20px 5px;
    font-size: 20px;
    line-height: 44px;
  }
  .banc .section3 .part1 div .des {
    font-size: 16px;
    font-weight: 600;
    line-height: 26px;
  }
  .banc .section3 .part1 div .text {
    font-size: 16px;
    font-weight: 400;
    line-height: 45px;
  }
  .banc .section3 .part1 div img {
    width: 100%;
  }
  .banc .section3 .part1 .div1 {
    height: 260px;
  }
  .banc .section3 .part1 .div1 .title {
    top: 80%;
    left: 6.6%;
  }
  .banc .section3 .part1 .div1 .des {
    top: 66%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div1 .text {
    top: 71%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div2 {
    height: 380px;
    margin-bottom: 39px;
    margin-top: -96px;
  }
  .banc .section3 .part1 .div2 .title {
    top: 79%;
    left: 6.6%;
  }
  .banc .section3 .part1 .div2 .des {
    top: 70%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div2 .text {
    top: 74%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div3 {
    height: 330px;
  }
  .banc .section3 .part1 .div3 .title {
    top: 81%;
    left: 6.6%;
  }
  .banc .section3 .part1 .div3 .des {
    top: 66.5%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div3 .text {
    top: 70%;
    left: 9.8%;
  }
  .banc .section3 .part2 {
    margin-top: 16%;
  }
  .banc .section3 .part2 div {
    margin: 3% auto;
    height: 470px;
  }
  .banc .section3 .part2 div .title {
    font-size: 20px;
    font-weight: 500;
    line-height: 26px;
    top: 101%;
    left: 9%;
  }
  .banc .section3 .part2 div .text {
    font-size: 16px;
    line-height: 26px;
    max-width: 480px;
    top: 92%;
    left: 9%;
  }
  .banc .section3 .btn {
    margin-top: -1%;
  }
  .banc .section4 {
    max-width: 1280px;
    top: 13%;
  }
  .banc .section4 .title {
    font-size: 36px;
    line-height: 46px;
    margin-bottom: 80px;
  }
  .banc .section4 .info {
    margin-top: -6%;
  }
  .banc .section4 .info div {
    margin-bottom: 5px;
    height: 270px;
  }
  .banc .section4 .info div .des {
    font-size: 16px;
    line-height: 26px;
    top: 47%;
    left: 9.8%;
  }
  .banc .section4 .info div .text {
    font-size: 16px;
    line-height: 26px;
    top: 59%;
    left: 9.8%;
  }
  .banc .section4 .info div img {
    width: 100%;
  }
  .banc .section5 {
    max-width: 1280px;
    top: 14.25%;
  }
  .banc .section5 .title {
    margin: 54px auto 85px;
    font-size: 36px;
    line-height: 46px;
    margin-bottom: 75px;
  }
  .banc .section5 div img {
    width: 100%;
  }
}
@media only screen and (max-width: 1280px) {
  .banc {
    height: 4630px;
  }
  .banc .btn {
    width: 40%;
  }
  .banc .btn .free-btn {
    width: 160px;
    height: 36px;
    line-height: 36px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .btn .demo-btn {
    width: 160px;
    height: 36px;
    margin: 4% 2%;
    font-size: 16px;
    line-height: 36px;
  }
  .banc .btn .special-btn {
    width: 220px;
    height: 40px;
    line-height: 40px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .section1 {
    top: 2.2%;
  }
  .banc .section1 img {
    width: 48.7%;
  }
  .banc .section2 {
    max-width: 1200px;
    top: 10%;
  }
  .banc .section2 .title {
    font-size: 36px;
    line-height: 46px;
    margin-bottom: 42px;
  }
  .banc .section2 .text1 {
    font-size: 18px;
    line-height: 26px;
    margin-bottom: 20px;
  }
  .banc .section2 .text2 {
    font-size: 18px;
    line-height: 26px;
    margin-bottom: 70px;
  }
  .banc .section2 .shows {
    display: flex;
    justify-content: space-between;
  }
  .banc .section2 .btn {
    margin-top: -40px;
  }
  .banc .section3 {
    max-width: 1000px;
    top: 12%;
  }
  .banc .section3 .title {
    font-size: 36px;
    line-height: 46px;
    margin-bottom: 63px;
  }
  .banc .section3 .line {
    left: 4%;
    top: 12%;
    height: 30%;
  }
  .banc .section3 .part1 {
    margin-top: -18%;
  }
  .banc .section3 .part1 div {
    margin-bottom: 10px;
  }
  .banc .section3 .part1 div .title {
    width: 210px;
    height: 44px;
    border-radius: 5px 5px 20px 5px;
    font-size: 20px;
    line-height: 44px;
  }
  .banc .section3 .part1 div .des {
    font-size: 16px;
    font-weight: 600;
    line-height: 26px;
  }
  .banc .section3 .part1 div .text {
    font-size: 16px;
    font-weight: 400;
    line-height: 27px;
  }
  .banc .section3 .part1 div img {
    width: 100%;
  }
  .banc .section3 .part1 .div1 {
    height: 260px;
  }
  .banc .section3 .part1 .div1 .title {
    top: 71%;
    left: 6.6%;
  }
  .banc .section3 .part1 .div1 .des {
    top: 54%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div1 .text {
    top: 58%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div2 {
    height: 380px;
    margin-bottom: -64px;
    margin-top: -121px;
  }
  .banc .section3 .part1 .div2 .title {
    top: 63.5%;
    left: 6.6%;
  }
  .banc .section3 .part1 .div2 .des {
    top: 55%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div2 .text {
    top: 59%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div3 {
    height: 330px;
  }
  .banc .section3 .part1 .div3 .title {
    top: 66%;
    left: 6.6%;
  }
  .banc .section3 .part1 .div3 .des {
    top: 53.5%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div3 .text {
    top: 57%;
    left: 9.8%;
  }
  .banc .section3 .part2 {
    margin-top: 9%;
  }
  .banc .section3 .part2 div {
    margin: 3% auto;
    height: 370px;
    width: 45%;
  }
  .banc .section3 .part2 div .desc {
    margin-left: -2%;
    width: 472px;
  }
  .banc .section3 .part2 div .desc .title {
    font-size: 20px;
    font-weight: 500;
    line-height: 26px;
    top: 28%;
    left: 5%;
  }
  .banc .section3 .part2 div .desc .text {
    font-size: 14px;
    line-height: 21px;
    max-width: 410px;
    top: 11%;
    left: -2%;
  }
  .banc .section3 .part2 div img {
    width: 100%;
  }
  .banc .section3 .btn {
    margin-top: -2%;
  }
  .banc .section4 {
    max-width: 1000px;
    top: 13%;
  }
  .banc .section4 .title {
    font-size: 36px;
    line-height: 46px;
    margin-bottom: 80px;
  }
  .banc .section4 .info {
    margin-top: -6%;
  }
  .banc .section4 .info div {
    margin-bottom: 5px;
    height: 240px;
  }
  .banc .section4 .info div .des {
    font-size: 16px;
    line-height: 26px;
    top: 47%;
    left: 9.8%;
  }
  .banc .section4 .info div .des::after {
    top: 131%;
  }
  .banc .section4 .info div .text {
    font-size: 16px;
    line-height: 26px;
    top: 53%;
    left: 9.8%;
  }
  .banc .section4 .info div img {
    width: 100%;
  }
  .banc .section5 {
    max-width: 1000px;
    top: 14.25%;
  }
  .banc .section5 .title {
    margin: 54px auto 85px;
    font-size: 36px;
    line-height: 46px;
    margin-bottom: 75px;
  }
  .banc .section5 div img {
    width: 100%;
  }
}
@media only screen and (max-width: 1024px) {
  .banc {
    height: 4300px;
  }
  .banc .btn {
    width: 40%;
  }
  .banc .btn .free-btn {
    width: 160px;
    height: 36px;
    line-height: 36px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .btn .demo-btn {
    width: 160px;
    height: 36px;
    margin: 4% 2%;
    font-size: 16px;
    line-height: 36px;
  }
  .banc .btn .special-btn {
    width: 220px;
    height: 40px;
    line-height: 40px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .section1 {
    top: 2.2%;
  }
  .banc .section1 img {
    width: 54.7%;
  }
  .banc .section2 {
    max-width: 1200px;
    top: 10%;
  }
  .banc .section2 .title {
    font-size: 32px;
    line-height: 46px;
    margin-bottom: 42px;
  }
  .banc .section2 .text1 {
    font-size: 15px;
    line-height: 26px;
    margin-bottom: 20px;
  }
  .banc .section2 .text2 {
    font-size: 15px;
    line-height: 26px;
    margin-bottom: 60px;
  }
  .banc .section2 .shows {
    display: flex;
    justify-content: space-between;
  }
  .banc .section2 .btn {
    margin-top: -40px;
  }
  .banc .section3 {
    max-width: 1000px;
    top: 12%;
  }
  .banc .section3 .title {
    font-size: 32px;
    line-height: 46px;
    margin-bottom: 63px;
  }
  .banc .section3 .line {
    left: 4%;
    top: 12%;
    height: 30%;
  }
  .banc .section3 .part1 {
    margin-top: -18%;
  }
  .banc .section3 .part1 div {
    margin-bottom: 10px;
  }
  .banc .section3 .part1 div .title {
    width: 210px;
    height: 44px;
    border-radius: 5px 5px 20px 5px;
    font-size: 20px;
    line-height: 44px;
  }
  .banc .section3 .part1 div .des {
    font-size: 16px;
    font-weight: 600;
    line-height: 26px;
  }
  .banc .section3 .part1 div .text {
    font-size: 16px;
    font-weight: 400;
    line-height: 27px;
  }
  .banc .section3 .part1 div img {
    width: 100%;
  }
  .banc .section3 .part1 .div1 {
    height: 260px;
  }
  .banc .section3 .part1 .div1 .title {
    top: 72%;
    left: 6.6%;
  }
  .banc .section3 .part1 .div1 .des {
    top: 54%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div1 .text {
    top: 58%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div2 {
    height: 380px;
    margin-bottom: -67px;
    margin-top: -121px;
  }
  .banc .section3 .part1 .div2 .title {
    top: 65%;
    left: 6.6%;
  }
  .banc .section3 .part1 .div2 .des {
    top: 55%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div2 .text {
    top: 59%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div3 {
    height: 330px;
  }
  .banc .section3 .part1 .div3 .title {
    top: 66%;
    left: 6.6%;
  }
  .banc .section3 .part1 .div3 .des {
    top: 54.5%;
    left: 9.8%;
  }
  .banc .section3 .part1 .div3 .text {
    top: 57%;
    left: 9.8%;
  }
  .banc .section3 .part2 {
    margin-top: 9%;
  }
  .banc .section3 .part2 div {
    margin: 3% auto;
    height: 370px;
    width: 45%;
  }
  .banc .section3 .part2 div .desc {
    margin-left: 0%;
    width: 100%;
  }
  .banc .section3 .part2 div .desc .title {
    font-size: 20px;
    font-weight: 500;
    line-height: 26px;
    top: 22%;
    left: 7%;
  }
  .banc .section3 .part2 div .desc .text {
    font-size: 14px;
    line-height: 21px;
    max-width: 410px;
    top: 6%;
    left: 0%;
  }
  .banc .section3 .part2 div img {
    width: 85%;
  }
  .banc .section3 .part2 .uniqueDiv .title {
    top: 95%;
  }
  .banc .section3 .part2 .uniqueDiv .text {
    top: 82%;
  }
  .banc .section3 .btn {
    margin-top: -2%;
  }
  .banc .section4 {
    max-width: 870px;
    top: 13%;
  }
  .banc .section4 .title {
    font-size: 32px;
    line-height: 46px;
    margin-bottom: 80px;
  }
  .banc .section4 .info {
    margin-top: -6%;
  }
  .banc .section4 .info div {
    margin-bottom: 5px;
    height: 185px;
  }
  .banc .section4 .info div .des {
    font-size: 16px;
    line-height: 26px;
    top: 63%;
    left: 9.8%;
  }
  .banc .section4 .info div .des::after {
    top: 110%;
  }
  .banc .section4 .info div .text {
    font-size: 16px;
    line-height: 26px;
    top: 66%;
    left: 9.8%;
  }
  .banc .section4 .info div img {
    width: 100%;
  }
  .banc .section5 {
    max-width: 870px;
    top: 14.25%;
  }
  .banc .section5 .title {
    margin: 54px auto 85px;
    font-size: 32px;
    line-height: 46px;
    margin-bottom: 75px;
  }
  .banc .section5 div img {
    width: 100%;
  }
}
@media only screen and (max-width: 870px) {
  .banc {
    height: 4600px;
  }
  .banc .btn {
    width: 40%;
  }
  .banc .btn .free-btn {
    width: 160px;
    height: 36px;
    line-height: 36px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .btn .demo-btn {
    width: 160px;
    height: 36px;
    margin: 4% 2%;
    font-size: 16px;
    line-height: 36px;
  }
  .banc .btn .special-btn {
    width: 220px;
    height: 40px;
    line-height: 40px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .section1 {
    top: 2.2%;
  }
  .banc .section1 img {
    width: 66.7%;
  }
  .banc .section2 {
    max-width: 690px;
    top: 10%;
  }
  .banc .section2 .title {
    font-size: 32px;
    line-height: 46px;
    margin-bottom: 42px;
  }
  .banc .section2 .text1 {
    font-size: 15px;
    line-height: 26px;
    margin-bottom: 20px;
  }
  .banc .section2 .text2 {
    font-size: 15px;
    line-height: 26px;
    margin-bottom: 60px;
  }
  .banc .section2 .shows {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
  }
  .banc .section2 .btn {
    margin-top: -40px;
  }
  .banc .section3 {
    max-width: 620px;
    top: 12%;
  }
  .banc .section3 .title {
    font-size: 27px;
    line-height: 46px;
    margin-bottom: 38px;
  }
  .banc .section3 .line {
    left: 3%;
    top: 7%;
    height: 15%;
  }
  .banc .section3 .part1 {
    margin-top: -24%;
  }
  .banc .section3 .part1 div {
    margin-bottom: 10px;
  }
  .banc .section3 .part1 div .title {
    width: 133px;
    height: 29px;
    border-radius: 5px 5px 20px 5px;
    font-size: 14px;
    line-height: 29px;
  }
  .banc .section3 .part1 div .des {
    font-size: 14px;
    font-weight: 600;
    line-height: 26px;
  }
  .banc .section3 .part1 div .text {
    font-size: 14px;
    font-weight: 400;
    line-height: 21px;
    max-width: 530px;
  }
  .banc .section3 .part1 div img {
    width: 100%;
  }
  .banc .section3 .part1 .div1 {
    height: 260px;
  }
  .banc .section3 .part1 .div1 .title {
    top: 58%;
    left: 5%;
  }
  .banc .section3 .part1 .div1 .des {
    top: 43%;
    left: 5%;
  }
  .banc .section3 .part1 .div1 .text {
    top: 41%;
    left: 5%;
  }
  .banc .section3 .part1 .div2 {
    height: 238px;
    margin-bottom: -49px;
    margin-top: -155px;
  }
  .banc .section3 .part1 .div2 .title {
    top: 70%;
    left: 5%;
  }
  .banc .section3 .part1 .div2 .des {
    top: 56%;
    left: 5%;
  }
  .banc .section3 .part1 .div2 .text {
    top: 56%;
    left: 5%;
  }
  .banc .section3 .part1 .div3 {
    height: 267px;
  }
  .banc .section3 .part1 .div3 .title {
    top: 63%;
    left: 5%;
  }
  .banc .section3 .part1 .div3 .des {
    top: 49.5%;
    left: 5%;
  }
  .banc .section3 .part1 .div3 .text {
    top: 49%;
    left: 5%;
  }
  .banc .section3 .part2 {
    margin-top: 6%;
  }
  .banc .section3 .part2 div {
    margin: 4% auto;
    height: 370px;
    width: 80%;
  }
  .banc .section3 .part2 div .desc {
    margin-left: 0;
    width: 489px;
  }
  .banc .section3 .part2 div .desc .title {
    font-size: 20px;
    font-weight: 500;
    line-height: 26px;
    top: 24%;
    left: 5%;
  }
  .banc .section3 .part2 div .desc .text {
    font-size: 14px;
    line-height: 21px;
    max-width: 410px;
    top: 17%;
    left: -3%;
  }
  .banc .section3 .part2 div img {
    width: 85%;
  }
  .banc .section3 .btn {
    margin-top: -5%;
  }
  .banc .section4 {
    max-width: 670px;
    top: 13%;
  }
  .banc .section4 .title {
    font-size: 27px;
    line-height: 46px;
    margin-bottom: 10px;
  }
  .banc .section4 .info {
    margin-top: -6%;
  }
  .banc .section4 .info div {
    margin-bottom: 5px;
    height: 140px;
  }
  .banc .section4 .info div .des {
    font-size: 16px;
    line-height: 26px;
    top: 67%;
    left: 9.8%;
  }
  .banc .section4 .info div .des::after {
    top: 116%;
  }
  .banc .section4 .info div .text {
    font-size: 14px;
    line-height: 26px;
    top: 72%;
    left: 9.8%;
  }
  .banc .section4 .info div img {
    width: 100%;
  }
  .banc .section5 {
    max-width: 670px;
    top: 14.25%;
  }
  .banc .section5 .title {
    margin: 54px auto 85px;
    font-size: 27px;
    line-height: 46px;
    margin-bottom: 75px;
  }
  .banc .section5 div img {
    width: 100%;
  }
}
@media only screen and (max-width: 769px) {
  .banc {
    height: 4600px;
  }
  .banc .video-shade .img {
    width: 400px;
    height: 300px;
  }
  .banc .btn {
    width: 57%;
  }
  .banc .btn .free-btn {
    width: 160px;
    height: 36px;
    line-height: 36px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .btn .demo-btn {
    width: 160px;
    height: 36px;
    margin: 4% 2%;
    font-size: 16px;
    line-height: 36px;
  }
  .banc .btn .special-btn {
    width: 220px;
    height: 40px;
    line-height: 40px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .section1 {
    top: 2.2%;
  }
  .banc .section1 img {
    width: 80%;
  }
  .banc .section2 {
    max-width: 500px;
    top: 10%;
  }
  .banc .section2 .title {
    font-size: 32px;
    line-height: 46px;
    margin-bottom: 42px;
  }
  .banc .section2 .text1 {
    font-size: 15px;
    line-height: 26px;
    margin-bottom: 20px;
  }
  .banc .section2 .text2 {
    font-size: 15px;
    line-height: 26px;
    margin-bottom: 60px;
  }
  .banc .section2 .shows {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
  }
  .banc .section2 .btn {
    margin-top: -40px;
  }
  .banc .section3 {
    max-width: 620px;
    top: 12%;
  }
  .banc .section3 .title {
    font-size: 27px;
    line-height: 46px;
    margin-bottom: 38px;
  }
  .banc .section3 .line {
    left: 3%;
    top: 7%;
    height: 15%;
  }
  .banc .section3 .part1 {
    margin-top: -24%;
  }
  .banc .section3 .part1 div {
    margin-bottom: 10px;
  }
  .banc .section3 .part1 div .title {
    width: 133px;
    height: 29px;
    border-radius: 5px 5px 20px 5px;
    font-size: 14px;
    line-height: 29px;
  }
  .banc .section3 .part1 div .des {
    font-size: 14px;
    font-weight: 600;
    line-height: 26px;
  }
  .banc .section3 .part1 div .text {
    font-size: 14px;
    font-weight: 400;
    line-height: 21px;
    max-width: 530px;
  }
  .banc .section3 .part1 div img {
    width: 100%;
  }
  .banc .section3 .part1 .div1 {
    height: 260px;
  }
  .banc .section3 .part1 .div1 .title {
    top: 55%;
    left: 5%;
  }
  .banc .section3 .part1 .div1 .des {
    top: 41%;
    left: 5%;
  }
  .banc .section3 .part1 .div1 .text {
    top: 40%;
    left: 5%;
  }
  .banc .section3 .part1 .div2 {
    height: 238px;
    margin-bottom: -52px;
    margin-top: -156px;
  }
  .banc .section3 .part1 .div2 .title {
    top: 70%;
    left: 5%;
  }
  .banc .section3 .part1 .div2 .des {
    top: 56%;
    left: 5%;
  }
  .banc .section3 .part1 .div2 .text {
    top: 56%;
    left: 5%;
  }
  .banc .section3 .part1 .div3 {
    height: 267px;
  }
  .banc .section3 .part1 .div3 .title {
    top: 63%;
    left: 5%;
  }
  .banc .section3 .part1 .div3 .des {
    top: 50.5%;
    left: 5%;
  }
  .banc .section3 .part1 .div3 .text {
    top: 49%;
    left: 5%;
  }
  .banc .section3 .part2 {
    margin-top: 8%;
  }
  .banc .section3 .part2 div {
    margin: 4% auto;
    height: 370px;
    width: 80%;
  }
  .banc .section3 .part2 div .desc {
    width: 98%;
  }
  .banc .section3 .part2 div .desc .title {
    font-size: 20px;
    font-weight: 500;
    line-height: 26px;
    top: 24%;
    left: 7%;
  }
  .banc .section3 .part2 div .desc .text {
    font-size: 14px;
    line-height: 21px;
    max-width: 410px;
    top: 12%;
    left: -1%;
  }
  .banc .section3 .part2 div img {
    width: 85%;
  }
  .banc .section3 .part2 .uniqueDiv .title {
    top: 95%;
  }
  .banc .section3 .part2 .uniqueDiv .text {
    top: 89%;
  }
  .banc .section3 .btn {
    margin-top: -2%;
  }
  .banc .section4 {
    max-width: 90%;
    top: 13%;
  }
  .banc .section4 .title {
    font-size: 27px;
    line-height: 46px;
    margin-bottom: 10px;
  }
  .banc .section4 .info {
    margin-top: -6%;
  }
  .banc .section4 .info div {
    margin-bottom: 5px;
    height: 140px;
  }
  .banc .section4 .info div .des {
    font-size: 14px;
    line-height: 26px;
    top: 67%;
    left: 7%;
  }
  .banc .section4 .info div .des::after {
    display: none;
  }
  .banc .section4 .info div .text {
    font-size: 14px;
    line-height: 19px;
    top: 65%;
    left: 7%;
    max-width: 450px;
  }
  .banc .section4 .info div img {
    width: 100%;
  }
  .banc .section5 {
    max-width: 90%;
    top: 14.25%;
  }
  .banc .section5 .title {
    margin: 54px auto 85px;
    font-size: 27px;
    line-height: 46px;
    margin-bottom: 75px;
  }
  .banc .section5 div img {
    width: 100%;
  }
}
@media only screen and (min-width: 320px) and (max-width: 420px) {
  .banc {
    height: 4800px;
  }
  .banc .video-shade .img {
    width: 300px;
    height: 200px;
  }
  .banc .btn {
    width: 70%;
  }
  .banc .btn .free-btn {
    width: 160px;
    height: 36px;
    line-height: 36px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .btn .demo-btn {
    width: 160px;
    height: 36px;
    margin: 4% 2%;
    font-size: 16px;
    line-height: 36px;
  }
  .banc .btn .special-btn {
    width: 220px;
    height: 40px;
    line-height: 40px;
    border-radius: 18px;
    margin: 4% 2%;
    font-size: 16px;
  }
  .banc .section1 {
    top: 3.2%;
  }
  .banc .section1 img {
    width: 90%;
  }
  .banc .section2 {
    max-width: 320px;
    top: 10%;
  }
  .banc .section2 .title {
    font-size: 32px;
    line-height: 46px;
    margin-bottom: 42px;
  }
  .banc .section2 .text1 {
    font-size: 15px;
    line-height: 26px;
    margin-bottom: 20px;
  }
  .banc .section2 .text2 {
    font-size: 15px;
    line-height: 26px;
    margin-bottom: 60px;
  }
  .banc .section2 .shows {
    display: flex;
    justify-content: space-between;
    margin-bottom: 20px;
    flex-direction: column;
  }
  .banc .section2 .shows div {
    width: 100%;
  }
  .banc .section2 .btn {
    margin-top: -40px;
    width: 90%;
  }
  .banc .section3 {
    max-width: 330px;
    top: 12%;
  }
  .banc .section3 .title {
    font-size: 21px;
    line-height: 46px;
    margin-bottom: 38px;
  }
  .banc .section3 .line {
    display: none;
  }
  .banc .section3 .part1 {
    margin-top: -3%;
  }
  .banc .section3 .part1 div {
    margin-bottom: 10px;
    background: linear-gradient(45deg, #fff, #cfeafb);
    border-radius: 11px;
  }
  .banc .section3 .part1 div .title {
    width: 133px;
    height: 29px;
    border-radius: 5px 5px 20px 5px;
    font-size: 14px;
    line-height: 29px;
  }
  .banc .section3 .part1 div .des {
    font-size: 14px;
    font-weight: 600;
    line-height: 21px;
    max-width: 300px;
  }
  .banc .section3 .part1 div .text {
    font-size: 14px;
    font-weight: 400;
    line-height: 21px;
    max-width: 530px;
    max-width: 300px;
  }
  .banc .section3 .part1 div img {
    display: none;
  }
  .banc .section3 .part1 .div1 {
    height: 200px;
  }
  .banc .section3 .part1 .div1 .title {
    top: 8%;
    left: 4%;
  }
  .banc .section3 .part1 .div1 .des {
    top: 0%;
    left: 6%;
  }
  .banc .section3 .part1 .div1 .text {
    top: 5%;
    left: 6%;
  }
  .banc .section3 .part1 .div2 {
    height: 238px;
    margin-bottom: 10px;
    margin-top: 0;
  }
  .banc .section3 .part1 .div2 .title {
    top: 8%;
    left: 4%;
  }
  .banc .section3 .part1 .div2 .des {
    top: 0%;
    left: 6%;
  }
  .banc .section3 .part1 .div2 .text {
    top: 5%;
    left: 6%;
  }
  .banc .section3 .part1 .div3 {
    height: 200px;
  }
  .banc .section3 .part1 .div3 .title {
    top: 8%;
    left: 4%;
  }
  .banc .section3 .part1 .div3 .des {
    top: 0%;
    left: 6%;
  }
  .banc .section3 .part1 .div3 .text {
    top: 5%;
    left: 6%;
  }
  .banc .section3 .part2 {
    margin-top: 1%;
  }
  .banc .section3 .part2 div {
    margin: 4% auto;
    height: 280px;
    width: 98%;
  }
  .banc .section3 .part2 div .desc {
    width: 100%;
  }
  .banc .section3 .part2 div .desc .title {
    font-size: 14px;
    font-weight: 500;
    line-height: 26px;
    top: 30%;
    left: 4%;
  }
  .banc .section3 .part2 div .desc .text {
    font-size: 12px;
    line-height: 18px;
    max-width: 300px;
    top: 10%;
    left: 0%;
  }
  .banc .section3 .part2 div img {
    width: 100%;
  }
  .banc .section3 .part2 .uniqueDiv .title {
    top: 97%;
  }
  .banc .section3 .part2 .uniqueDiv .text {
    top: 84%;
  }
  .banc .section3 .btn {
    margin-top: -4%;
  }
  .banc .section4 {
    max-width: 90%;
    top: 13%;
  }
  .banc .section4 .title {
    font-size: 21px;
    line-height: 46px;
    margin-bottom: 35px;
  }
  .banc .section4 .info {
    margin-top: -6%;
  }
  .banc .section4 .info div {
    margin-bottom: 5px;
    height: 140px;
    background: linear-gradient(45deg, #fff, #cfeafb);
    border-radius: 11px;
    margin-bottom: 10px;
  }
  .banc .section4 .info div .des {
    font-size: 14px;
    line-height: 26px;
    top: 14%;
    left: 7%;
  }
  .banc .section4 .info div .text {
    font-size: 14px;
    line-height: 19px;
    top: 20%;
    left: 7%;
    max-width: 310px;
  }
  .banc .section4 .info div img {
    display: none;
  }
  .banc .section5 {
    max-width: 90%;
    top: 13.25%;
  }
  .banc .section5 .title {
    margin: 0;
    font-size: 21px;
    line-height: 46px;
    margin-bottom: 30px;
  }
  .banc .section5 div img {
    width: 100%;
  }
}