:root {
  --ink: #171a20;
  --muted: #7b818b;
  --accent1: #12c8bc;
  --accent2: #00eb85
}

* {
  box-sizing: border-box
}

html {
  scroll-behavior: smooth
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: #fff
}

button {
  font: inherit
}

.hero {
  height: 650px;
  display: grid;
  place-items: center;
  text-align: center;
  background-image: url("images/hero-bg.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.hero__content {
  margin-top: -10px
}

.hero h1,
.cta h2 {
  margin: 0 0 18px;
  font-size: 56px;
  letter-spacing: 3px;
  text-shadow: 0 3px 3px rgba(0, 0, 0, .12)
}

.hero__lead {
  margin: 0;
  color: #303641;
  font-size: 22px
}

.hero__tags {
  margin: 17px 0 48px;
  color: #626b76;
  font-size: 15px
}

.hero__tags i {
  display: inline-block;
  width: 1px;
  height: 14px;
  margin: 0 10px;
  background: #9ba3ad;
  vertical-align: -2px
}

.download-btn {
  width: 305px;
  height: 90px;
  border: 0;
  border-radius: 7px;
  color: #fff;
  font-size: 29px;
  letter-spacing: 5px;
  cursor: pointer;
  background: linear-gradient(110deg, var(--accent1), var(--accent2));
  box-shadow: 0 12px 30px rgba(0, 214, 159, .15);
  transition: transform .2s, box-shadow .2s
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 34px rgba(0, 214, 159, .28)
}

.download-btn:active {
  transform: translateY(0)
}

.hero__system {
  margin-top: 34px;
  color: #8a919a;
  font-size: 14px
}

.section {
  padding: 90px 24px 75px
}

.section-heading {
  text-align: center
}

.section-heading h2,
.detail__copy h2 {
  margin: 0 0 13px;
  font-size: 28px;
  letter-spacing: 1px
}

.section-heading p {
  margin: 0;
  color: #a1a5aa;
  font-size: 13px
}

.feature-grid {
  max-width: 1080px;
  margin: 60px auto 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 95px
}

.feature-card {
  text-align: center
}

.feature-card img {
  object-fit: cover
}

.feature-card h3 {
  margin: 20px 0 15px;
  font-size: 20px
}

.feature-card p {
  max-width: 245px;
  margin: auto;
  color: #747a83;
  font-size: 12px;
  line-height: 2
}

.detail {
  display: flex;
  align-items: center;
  padding: 80px 0;
}

.detail--tinted {
  background-image: url("images/hero-bg.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.detail__inner {
  width: min(1240px, 88%);
  margin: auto;
  display: flex;
  align-items: center;
  gap: 13%
}

.detail__inner--reverse {
  flex-direction: row-reverse
}

.detail__visual {
  flex: 1
}

.detail__visual img {
  display: block;
}

.detail__copy {
  flex: 0 0 360px
}

.detail__copy h2 {
  font-size: 30px
}

.detail__copy p {
  margin: 25px 0 0;
  color: #858b94;
  font-size: 15px;
  line-height: 2.5
}

.cta {
  height: 730px;
  position: relative;
  display: grid;
  place-items: center;
  text-align: center;
  background-image: url("images/footer-bg.jpg");
  background-size: 100%;
  background-repeat: no-repeat;
  background-position: top center;
}

.cta__content {
  margin-top: 15px
}

.cta h2 {
  font-size: 56px
}

.cta p {
  margin: 22px 0 65px;
  color: #39414d;
  font-size: 22px
}

.cta footer {
  position: absolute;
  bottom: 45px;
  color: #8a929b;
  font-size: 12px
}

.cta footer a {
  text-decoration: none;
  color: #8a929b;
  font-size: 12px
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 35px;
  z-index: 5;
  padding: 14px 24px;
  border-radius: 8px;
  color: #fff;
  background: rgba(25, 32, 41, .92);
  opacity: 0;
  transform: translate(-50%, 15px);
  pointer-events: none;
  transition: .25s
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0)
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease
}

.reveal.visible {
  opacity: 1;
  transform: none
}

@media(max-width:780px) {
  .hero {
    height: 560px
  }

  .hero h1,
  .cta h2 {
    font-size: 36px
  }

  .hero__lead,
  .cta p {
    font-size: 16px
  }

  .hero__tags {
    line-height: 2
  }

  .download-btn {
    width: 230px;
    height: 68px;
    font-size: 22px
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 55px
  }

  .detail {
    min-height: auto;
    padding: 75px 24px
  }

  .detail__inner,
  .detail__inner--reverse {
    width: 100%;
    flex-direction: column;
    gap: 35px
  }

  .detail__copy {
    flex: auto;
    text-align: center
  }

  .detail__copy h2 {
    font-size: 26px
  }

  .detail__copy p {
    font-size: 14px;
    line-height: 2
  }

  .detail__visual img {
    max-width: 620px
  }

  .cta {
    height: 580px
  }

  .cta footer {
    width: 90%;
    line-height: 1.6
  }
}