* {
  padding: 0px;
  margin: 0px;
}
.dev {
  position: fixed;
  top: 0px;
  left: 0px;
}
body {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.ctn {
  max-width: 1180px;
  margin: 0 auto;
}
.nav-bar {
  width: 100%;
  height: 80px;
  background-color: #ffffff;
  position: sticky;
  z-index: 10;
  left: 0px;
  top: 0px;
}
.nav-bar .logo {
  height: 80px;
  display: flex;
  align-items: center;
}
.nav-bar .logo > img {
  width: 68px;
  height: 68px;
}
.nav-bar .logo .name {
  font-size: 22px;
  font-weight: bold;
  margin-left: 10px;
}
.banner {
  width: 100%;
  height: 580px;
  background-color: #47CA02;
  overflow: hidden;
}
.banner .ctn {
  width: 100%;
  display: flex;
  position: relative;
}
.banner .ctn .title {
  margin-top: 260px;
}
.banner .ctn .title .t1 {
  white-space: nowrap;
  font-size: 52px;
  font-weight: bold;
  color: #ffffff;
}
.banner .ctn .title .t2 {
  font-size: 28px;
  color: #ffffff;
}
.banner img {
  position: absolute;
  right: -60px;
  transform: scale(0.8) translateX(16vw) rotate(-8deg) translateY(-3vw);
}
.platform-bar {
  display: flex;
  justify-content: space-between;
  max-width: 1180px;
  margin-top: 80px;
  margin-left: auto;
  margin-right: auto;
  flex-wrap: wrap;
}
.platform-bar .item {
  border-radius: 8px;
  width: 23%;
  min-width: 200px;
  height: 320px;
  box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;
  overflow: hidden;
}
.platform-bar .item .icon {
  width: 50%;
  height: 70%;
  display: flex;
  justify-content: center;
  align-items: center;
}
.platform-bar .item .icon > svg {
  width: 100%;
}
.platform-bar .item .ewm {
  border-radius: 8px;
  position: absolute;
  left: 0px;
  top: 100%;
  width: 100%;
  height: 100%;
  background-color: #FFFFFF;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: top 0.2s ease;
}
.platform-bar .item .ewm img {
  width: 94%;
}
.platform-bar .item:hover .ewm {
  top: 0px;
}
.platform-bar .item:active .ewm {
  top: 0px;
}
.m-info {
  background-color: #FFFFFF;
  width: 100%;
  display: flex;
  justify-content: center;
  position: relative;
}
.m-info > img {
  width: 100vw;
  height: calc(100vw / 1243 * 1531);
}
.m-info .app-info {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: calc(70 / 414 * 100vw);
}
.m-info .app-info .icon {
  width: calc(100 / 414 * 100vw);
}
.m-info .app-info .name {
  margin-top: calc(18 / 414 * 100vw);
  font-size: calc(24 / 414 * 100vw);
}
.m-p1 > img {
  width: calc(222 / 414 * 100vw);
  position: relative;
  top: calc(-100 / 414 * 100vw);
  z-index: 2;
}
.bottom-float-bar {
  position: fixed;
  z-index: 5;
  left: 0px;
  bottom: 0px;
  width: 100%;
  height: calc(80 / 414 * 100vw);
  background-color: #ffffff;
  justify-content: center;
  align-items: center;
  box-shadow: 0px -0.2em 0.2em rgba(0, 0, 0, 0.03);
}
.bottom-float-bar .btn {
  border-radius: 100rem;
  background-color: #ffd123;
  width: 80%;
  height: calc(52 / 414 * 100vw);
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: calc(20 / 414 * 100vw);
  font-weight: bold;
}
.tip {
  position: fixed;
  z-index: 10;
  left: 0px;
  top: 0px;
  width: 100%;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.8);
}
footer {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
}
footer a {
  text-decoration: none;
  color: #000000;
}

/* 手机 */
@media screen and (max-width: 480px) {
  :root {
    --sw: 480;
  }
  .dev2,
  .dev3 {
    display: none;
  }
  .dev1 {
    display: block;
  }
  .nav-bar {
    display: none;
  }
  .banner {
    display: none;
  }
  .platform-bar {
    display: none;
  }
  .bottom-float-bar {
    display: flex;
    height: calc(80 / var(--sw) * 100vw);
  }
  .bottom-float-bar .btn {
    height: calc(52 / var(--sw) * 100vw);
    font-size: calc(20 / var(--sw) * 100vw);
  }
  .bottom-float-bar-h {
    height: calc(80 / var(--sw) * 100vw);
  }
  footer {
    font-size: calc(14 / var(--sw) * 100vw);
  }
}

/* ipad */
@media screen and (min-width: 481px) and (max-width: 768px) {
  :root {
    --sw: 768;
  }
  .dev1,
  .dev3 {
    display: none;
  }
  .dev2 {
    display: block;
  }
  .nav-bar {
    display: none;
  }
  .banner {
    display: none;
  }
  .platform-bar {
    display: none;
  }
  .m-info > img {
    width: 100%;
  }
  .bottom-float-bar {
    display: flex;
    height: calc(80 / var(--sw) * 100vw);
  }
  .bottom-float-bar .btn {
    height: calc(52 / var(--sw) * 100vw);
    font-size: calc(20 / var(--sw) * 100vw);
  }
  .bottom-float-bar-h {
    height: calc(80 / var(--sw) * 100vw);
  }
  footer {
    font-size: calc(14 / var(--sw) * 100vw);
  }
}

/* pc */
@media screen and (min-width: 769px) {
  .dev1,
  .dev2 {
    display: none;
  }
  .dev3 {
    display: block;
  }
  .nav-bar {
    height: 80px;
  }
  .m-info {
    display: none;
  }
  .m-p1 {
    display: none;
  }
  .bottom-float-bar {
    display: none;
  }
  footer {
    margin-top: 120px;
    width: 100%;
    height: 240px;
    background-color: #282828;
    color: #cccccc;
    font-size: 14px;
  }
  footer a {
    text-decoration: none;
    color: #cccccc;
  }
}