* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  min-width: 1200px;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: #333;
  background: #edf4f8;
}

img {
  display: block;
  max-width: 100%;
}

a {
  text-decoration: none;
}

.site-header {
  width: 100%;
  background: #fff;
  position: relative;
  z-index: 5;
}

.home-header {
  height: 66px;
}

.page-header {
  height: 90px;
}

.header-inner {
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
}

.home-header-inner {
  width: 800px;
}

.page-header-inner,
.page-container {
  width: 1100px;
}

.logo {
  color: #1297f4;
  font-weight: 700;
  letter-spacing: 1px;
  white-space: nowrap;
}

.home .logo {
  font-size: 30px;
  line-height: 66px;
}

.product .logo,
.about .logo {
  font-size: 34px;
  line-height: 90px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 44px;
  white-space: nowrap;
}

.home .nav {
  margin-left: 250px;
}

.product .nav,
.about .nav {
  margin-left: 360px;
}

.nav a {
  color: #333;
  font-size: 13px;
  line-height: 1;
}

.nav a.active,
.nav a:hover {
  color: #0b95f5;
}

.home-hero {
  height: 547px;
  background: url("../images/home-hero.png") center top / cover no-repeat;
}

.home-features {
  background: #edf4f8;
  padding: 84px 0 88px;
}

.home-container {
  width: 800px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  font-size: 18px;
  line-height: 24px;
  font-weight: 400;
  color: #333;
  margin-bottom: 62px;
}

.feature-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 54px;
}

.feature-row > img {
  width: 402px;
  height: auto;
}

.feature-row-reverse {
  margin-top: 14px;
  margin-bottom: 54px;
}

.last-row {
  margin-bottom: 0;
}

.feature-copy {
  width: 330px;
  color: #8c939a;
  font-size: 14px;
  line-height: 2;
}

.feature-copy h2 {
  color: #3f4449;
  font-size: 18px;
  line-height: 1;
  font-weight: 400;
  margin-bottom: 14px;
}

.blue-line {
  display: block;
  width: 22px;
  height: 2px;
  background: #168ff0;
  margin-bottom: 17px;
}

.site-footer {
  background: #333;
  color: #fff;
  font-size: 12px;
  line-height: 22px;
}

.footer-home {
  height: 282px;
}

.footer-large {
  height: 387px;
}

.footer-inner {
  margin: 0 auto;
  opacity: 0.96;
}

.footer-record-link {
  color: #fff;
}

.footer-record-link:hover {
  color: #7bc8ff;
}

.footer-home .footer-inner {
  padding-top: 63px;
}

.footer-large .footer-inner {
  padding-top: 103px;
}

.product-main {
  height: 1278px;
  background: #fff;
  position: relative;
  overflow: hidden;
}

.product-main::before {
  content: "";
  position: absolute;
  inset: 0;
  background: #edf4f8;
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
}

.product-inner {
  position: relative;
  height: 100%;
  margin: 0 auto;
}

.product-copy {
  position: absolute;
  left: 18px;
  top: 205px;
  width: 540px;
  z-index: 2;
}

.product-copy h1 {
  font-size: 22px;
  line-height: 1;
  font-weight: 400;
  color: #333;
  margin-bottom: 44px;
}

.product-copy p {
  position: relative;
  padding-left: 24px;
  margin-bottom: 22px;
  color: #333;
  font-size: 14px;
  line-height: 31px;
}

.product-copy p span {
  position: absolute;
  left: 0;
  top: 11px;
  width: 9px;
  height: 9px;
  background: #0b95f5;
}

.product-icons {
  position: absolute;
  left: -5px;
  top: 485px;
  width: 500px;
  z-index: 2;
}

.product-devices {
  position: absolute;
  left: 548px;
  top: 264px;
  width: 624px;
  z-index: 2;
}

.about-hero {
  height: 551px;
  background: url("../images/about-hero.png") center top / cover no-repeat;
}

.about-intro {
  height: 504px;
  background: #fff;
}

.about-intro-inner {
  position: relative;
  height: 100%;
  margin: 0 auto;
}

.about-intro img {
  position: absolute;
  left: 0;
  top: 65px;
  width: 513px;
}

.about-copy {
  position: absolute;
  left: 565px;
  top: 151px;
  width: 520px;
  color: #979797;
  font-size: 15px;
  line-height: 29px;
}

.about-copy h1 {
  color: #333;
  font-size: 26px;
  line-height: 1;
  font-weight: 400;
  margin-bottom: 30px;
}

.about-contact {
  height: 301px;
  background: url("../images/about-contact.png") center top / cover no-repeat;
}

@media (max-width: 1200px) {
  html,
  body {
    min-width: 0;
  }

  .home-header-inner,
  .home-container,
  .page-header-inner,
  .page-container {
    width: calc(100% - 48px);
  }

  .home .nav,
  .product .nav,
  .about .nav {
    margin-left: auto;
    gap: 24px;
  }

  .home-features {
    padding: 60px 0;
  }

  .feature-row,
  .feature-row-reverse {
    gap: 28px;
  }

  .feature-copy {
    width: calc(100% - 430px);
  }

  .product-copy {
    left: 0;
  }

  .product-icons {
    left: 0;
  }

  .product-devices {
    left: auto;
    right: 0;
    width: 52%;
  }

  .about-intro img {
    left: 0;
  }

  .about-copy {
    left: 54%;
    width: 42%;
  }
}

@media (max-width: 768px) {
  .site-header,
  .home-header,
  .page-header {
    height: auto;
  }

  .header-inner {
    flex-direction: column;
    gap: 14px;
    padding: 16px 0;
  }

  .logo,
  .home .logo,
  .product .logo,
  .about .logo {
    font-size: 28px;
    line-height: 1;
  }

  .nav {
    margin-left: 0 !important;
  }

  .home-hero,
  .about-hero,
  .about-contact {
    background-size: cover;
  }

  .feature-row,
  .feature-row-reverse {
    flex-direction: column;
    align-items: flex-start;
  }

  .feature-row-reverse {
    flex-direction: column-reverse;
  }

  .feature-copy,
  .feature-row > img {
    width: 100%;
  }

  .product-main {
    height: auto;
    padding: 80px 0 120px;
  }

  .product-inner {
    height: auto;
  }

  .product-copy,
  .product-icons,
  .product-devices {
    position: relative;
    left: auto;
    right: auto;
    top: auto;
    width: 100%;
    margin-bottom: 40px;
  }

  .about-intro {
    height: auto;
    padding: 60px 0;
  }

  .about-intro-inner {
    height: auto;
  }

  .about-intro img,
  .about-copy {
    position: relative;
    left: auto;
    top: auto;
    width: 100%;
  }

  .about-copy {
    margin-top: 32px;
  }

  .footer-home,
  .footer-large {
    height: auto;
  }

  .footer-inner,
  .footer-home .footer-inner,
  .footer-large .footer-inner {
    padding-top: 48px;
    padding-bottom: 48px;
  }
}