.page1 {
    margin: 0 auto;
    position: relative;
    /* background: url(../image/section1/bg.jpg) no-repeat;
    background-size: 100%; */
    width: 100%;
    height: 12.8rem;
}

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

.slogan2 {
  width: 5.07rem;
  height: 2.34rem;
  background: url(../image/section1/slogn.png) no-repeat;
  background-size: 100%;
  position: absolute;
  top: 8rem;
  left: 50%;
  margin-left: -2.535rem;
  z-index: 1;
}

.page1_change_video {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  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: 3rem;
  height: 3rem;
  top: 6.4rem;
  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: 3.12rem;
  height: 0.86rem;
  position: absolute;
}

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

.topic .down-gp  {
    background: url(../image/section1/google_store.png) no-repeat;
    background-size: 100%;
    top: 11.2rem;
    left: 0.36rem;
}

.topic .down-iOS  {
    background: url(../image/section1/app_store.png) no-repeat;
    background-size: 100%;
    top: 11.2rem;
    right: 0.36rem;
}

.topic .down-one  {
    background: url(../image/section1/one_store.png) no-repeat;
    background-size: 100%;
    top: 10.1rem;
    left: 0.36rem;
}

.topic .down-gs  {
    background: url(../image/section1/galaxy_store.png) no-repeat;
    background-size: 100%;
    top: 10.1rem;
    right: 0.36rem;
}

.header-select {
  width: 1.34rem;
  height: 1.14rem;
  position: absolute;
  left: 50%;
  bottom: 0.2rem;
  margin-left:-0.67rem;
  animation: bounce-inSS 2s infinite;
  background: url(../image/section1/header-select.png) no-repeat;
  background-size: 100%;
}




.nav-close{
  width: .27rem;
  height: .32rem;
  position: absolute;
  top: .36rem;
  right: .16rem;
  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);
    }
  }