body,html{
  background: #FFFFFF;
}
a {
  color: #FFFFFF;
}
/*banner*/
.banner {
  display: block;
  width: 100vw;
  height: calc(100vh - 64px);
  background-image: url("../img/1_PC.jpg");
  background-position: center;
  background-size: auto;
  background-repeat: no-repeat;
}
.banner > section {
  width: 1140px;
  height: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}
.banner .title {
  width: 640px;
  font-style: normal;
  font-weight: 700;
  font-size: 64px;
  color: #333333;
  margin-top: 252px;
  text-align: left;
  line-height: 78px;
}
.banner .desc {
  color: #333333;
  font-family: Arial;
  font-size: 28px;
  font-style: normal;
  font-weight: 400;
  line-height: 40px;
  margin-top: 16px;
}
@media (min-width: 640px) and (max-width: 1139px) {
  .banner {
    height: calc(100vh - 56px);
    background-image: url("../img/1_pad.png");
    background-size: auto;
  }
  .banner > section {
    width: 100%;
    align-items: center;
  }
  .banner .title {
    width: 592px;
    margin-top: 32px;
    font-size: 40px;
    text-align: left;
    line-height: 54px;
  }
  .banner .desc {
    width: 592px;
    font-size: 28px;
  }
}
@media (min-width: 320px) and (max-width: 639px) {
  .banner {
    height: calc(100vh - 56px);
    background-image: url("../img/1_mobile.png");
    background-size: auto 100%;
  }
  .banner > section {
    width: 100%;
    align-items: center;
    padding: 0 24px;
  }
  .banner .title {
    width: 327px;
    margin-top: 24px;
    font-size: 40px;
    text-align: left;
    line-height: 54px;
  }
  .banner .desc {
    display: none;
  }
}
/*banner*/
/*choose*/
.choose {
  display: block;
  width: 100%;
  height: 122px;
  background: #FFFFFF;
}
.choose > section {
  padding-top: 64px;
}
.choose > section > p {
  color: #333333;
  text-align: center;
  font-size: 48px;
  font-style: normal;
  font-weight: 700;
  line-height: 58px;
}
@media (min-width: 320px) and (max-width: 639px) {
  .choose > section > p {
    font-size: 34px;
  }
}
/*choose*/
/*service*/
.service {
  display: block;
  width: 100%;
  height: 640px;
  background: #FFFFFF;
}
.service > section {
  width: 1140px;
  height: 100%;
  margin: 0 auto;
  opacity: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  top: -60px;
}
.service .textBox {
  width: 564px;
  display: flex;
  flex-direction: column;
}
.service .title {
  font-size: 48px;
  font-weight: 700;
  line-height: 58px;
  color: #131313;
  font-style: normal;
  margin-top: 24px;
}
.service .desc {
  font-style: normal;
  font-weight: 400;
  font-size: 18px;
  line-height: 24px;
  color: #7E7E7E;
  margin-top: 8px;
}
.service .desc .cu {
  color: #319CFF;
  cursor: pointer;
}
.service .imgBox {
  width: 480px;
  height: 480px;
}
.service .imgBoxPC {
  display: block;
}
.service .imgBoxPhone {
  display: none;
}
.service .imgBox img {
  width: 100%;
  height: 100%;
}
@media (min-width: 640px) and (max-width: 1139px) {
  .service {
    height: 640px;
  }
  .service > section {
    width: 100%;
    padding: 0 24px 0 48px;
  }
  .service .textBox {
    width: auto;
    flex: 1;
  }
  .service .textBox_left {
    margin-left: 28px;
  }
  .service .textBox_right {
    margin-right: 28px;
  }
  .service .imgBox {
    width: 270px;
    height: 270px;
  }
  .service .title {
    font-size: 32px;
    margin-top: 24px;
    font-weight: 400;
    line-height: normal;
  }
  .service .desc {
    font-size: 15px;
    margin-top: 8px;
  }
}
@media (min-width: 320px) and (max-width: 639px) {
  .service {
    width: 100vw;
    height: auto;
  }
  .service > section {
    width: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
  }
  .service .textBox {
    width: 100%;
    padding: 40px 24px 0;
    margin-bottom: 64px;
  }
  .service .imgBox {
    width: 375px;
    height: 375px;
    margin-bottom: 88px;
  }
  .service .imgBoxPC {
    display: none;
  }
  .service .imgBoxPhone {
    display: block;
  }
  .service .title {
    font-size: 32px;
    margin-top: 24px;
    line-height: normal;
  }
  .service .desc {
    font-size: 15px;
    margin-top: 8px;
  }
}
/*service*/
/*contact_us*/
.contact_us {
  display: block;
  width: 100%;
  height: 436px;
  background: #1A99FB;
}
.contact_us > section {
  width: 1140px;
  padding: 80px 0;
  margin: 0 auto;
}
.contact_us .title {
  color: #FFFFFF;
  text-align: center;
  font-size: 48px;
  font-style: normal;
  font-weight: 700;
  line-height: 58px;
  margin-bottom: 40px;
}
.contact_us .desc {
  color: #FFFFFF;
  text-align: center;
  font-size: 24px;
  font-style: normal;
  font-weight: 700;
  line-height: 40px;
}
.contact_us .desc .text-decoration {
  text-decoration: underline;
}
@media (min-width: 640px) and (max-width: 1139px) {
  .contact_us {
    width: 100vw;
    height: 655px;
  }
  .contact_us > section {
    width: 100%;
    padding: 40px 0;
  }
  .contact_us .title {
    width: 375px;
    font-size: 48px;
    text-align: center;
    margin: 0 auto 40px;
  }
  .contact_us .desc {
    width: 592px;
    font-size: 24px;
    margin: 0 auto;
  }
}
@media (min-width: 320px) and (max-width: 639px) {
  contact_us {
    width: 100vw;
    height: 428px;
  }
  .contact_us > section {
    width: 100%;
    padding: 40px 0;
  }
  .contact_us .title {
    width: 327px;
    margin: 0 auto 40px;
    text-align: center;
    font-size: 34px;
    line-height: 40px;
  }
  .contact_us .desc {
    width: 327px;
    font-size: 15px;
    margin: 0 auto;
    line-height: 24px;
    text-align: left;
  }
}
/*contact_us*/
/*footer*/
.footer {
  width: 100%;
  height: 72px;
  background: #1A99FB;
}
.footer > p {
  height: 100%;
  font-style: normal;
  font-weight: 400;
  font-size: 14px;
  color: #FFFFFF;
  text-align: center;
  line-height: 72px;
}
/*footer*/