.page1 {
    width: 100%;
    height: 14.36rem;
    position: relative;
    /* background: url(../image/section1/bg.png) no-repeat;
    background-size: 100%; */
}

.topic {
  position: relative;
  width: 100%;
  height: 100%;
}

.slogan2 {
  width: 7.2rem;
  height: 2.47rem;
  background: url(../image/section1/slogn.png) no-repeat;
  background-size: 100%;
  position: absolute;
  top: 8.8rem;
  left: 50%;
  margin-left: -3.6rem;
  z-index: 11;
}

.page1_change_video {
  width: 100%;
  height: 100%;
  position: absolute;
  top: -0.5rem;
  left: 0;
}
.title-page {
  width: 5.85rem;
  height: .91rem;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  top: 9rem;
  background:url(../image/section1/title.png) no-repeat;
  background-size: 100%;
}

.topic .btn-video {
  position: absolute;
  width: 1.36rem;
  height:  1.36rem;
  top: 5.9rem;
  left: 50%;
  transform: translateX(-50%);
  background:url(../image/section1/btn-play.png) no-repeat;
  background-size: 100%;
}

.topic .down-gp ,
.topic .down-iOS ,
.topic .down-one ,
.topic .down-gs {
  width: 2.78rem;
  height: 0.83rem;
  position: absolute;
}

.topic .down-gp a,
.topic .down-iOS a,
.topic .down-one a,
.topic .down-gs a{
  display: block;
  width: 100%;
  height: 100%;
}

.topic .down-gp  {
    background: url(../image/section1/google_store.png) no-repeat;
    background-size: 100%;
    top: 11.2rem;
    left: 0.6rem;
}

.topic .down-iOS  {
    background: url(../image/section1/app_store.png) no-repeat;
    background-size: 100%;
  top: 11.2rem;
    right: 0.6rem;
}

.topic .down-one  {
    background: url(../image/section1/one_store.png) no-repeat;
    background-size: 100%;
    top: 12.3rem;
    left: 0.6rem;
}

.topic .down-gs  {
    background: url(../image/section1/galaxy_store.png) no-repeat;
    background-size: 100%;
  top: 12.3rem;
    right: 0.6rem;
}

.header-select {
  width: .38rem;
  height: .78rem;
  position: absolute;
  left: 48%;
  bottom: 0.1rem;
  animation: bounce-inSS 2s infinite;
  background: url(../image/section1/header-select1.png) no-repeat;
  background-size: 100%;
}

.pc-slogan-countdown {
  display: none;
}

/* ========== PC 首屏定制（暂关，需要时去掉注释即可） ==========
html.pc-device .page1 {
  width: 100vw;
  height: 100vh;
  min-height: 562.5px;
  margin-left: calc((7.2rem - 100vw) / 2);
  overflow: hidden;
}

html.pc-device .page1 .topic {
  background: url(../../image/section1/bg.jpg) center top / cover no-repeat;
}

html.pc-device .page1_change_video,
html.pc-device .page1 .slogan2,
html.pc-device .page1 .header-select {
  display: none;
}

html.pc-device .page1 .pc-slogan-countdown {
  display: block;
  position: absolute;
  top: 46.7%;
  left: 50%;
  width: min(39.27vw, 754px);
  aspect-ratio: 754 / 143;
  background: url(../../image/section1/slogan-countdown.png) center / contain no-repeat;
  transform: translateX(-50%);
  z-index: 2;
}

html.pc-device .page1 .down-gp,
html.pc-device .page1 .down-iOS,
html.pc-device .page1 .down-one,
html.pc-device .page1 .down-gs {
  top: auto;
  right: auto;
  bottom: 7.17%;
  width: min(12.55vw, 241px);
  aspect-ratio: 241 / 71;
  height: auto;
  z-index: 2;
  display: none;
}

html.pc-device .page1 .down-gp {
  left: calc(50% - min(26.15vw, 502px));
  background: url(../../image/section1/google_store.png) center / contain no-repeat;
}

html.pc-device .page1 .down-iOS {
  left: calc(50% - min(13.07vw, 251px));
  background: url(../../image/section1/ios-store.png) center / contain no-repeat;
}

html.pc-device .page1 .down-one {
  left: 50%;
  background: url(../../image/section1/one-store.png) center / contain no-repeat;
}

html.pc-device .page1 .down-gs {
  left: calc(50% + min(13.07vw, 251px));
  background: url(../../image/section1/galaxy-store.png) center / contain no-repeat;
}
========== PC 首屏定制 end ========== */

.nav-close{
  width: .42rem;
  height: .42rem;
  position: absolute;
  top: .36rem;
  right: 0.6rem;
  background: url(../image/section1/nav-close.png) no-repeat;
  background-size: 100%;
  cursor: pointer;
}

@keyframes bounce-inSS {

    0%,
    20%,
    50%,
    80%,
    100% {
      transform: translateY(0);
    }
  
    40% {
      transform: translateY(-.3rem);
    }
  
    60% {
      transform: translateY(-.15rem);
    }
  }