body {
  background: #170B46;
}

@-webkit-keyframes bounceInDown {
  from,
  60%,
  75%,
  90%,
  to {
    -webkit-animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    visibility:visible;
  }

  0% {
    opacity: 0;
    -webkit-transform: translate3d(0, -20rem, 0);
    transform: translate3d(0, -20rem, 0);
    visibility:visible;
  }

  60% {
    opacity: 1;
    -webkit-transform: translate3d(0, 0.5rem, 0);
    transform: translate3d(0, 0.5rem, 0);
    visibility:visible;
  }

  75% {
    -webkit-transform: translate3d(0, -0.2rem, 0);
    transform: translate3d(0,  -0.2rem, 0);
    visibility:visible;
  }

  90% {
    -webkit-transform: translate3d(0, 0.1rem, 0);
    transform: translate3d(0, 0.1rem, 0);
    visibility:visible;
  }

  to {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
    visibility:visible;
  }
}

@keyframes bounceInDown {
  from,
  60%,
  75%,
  90%,
  to {
    -webkit-animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1);
    visibility:visible;
  }

  0% {
    opacity: 0;
    -webkit-transform: translate3d(0, -20rem, 0);
    transform: translate3d(0, -20rem, 0);
    visibility:visible;
  }

  60% {
    opacity: 1;
    -webkit-transform: translate3d(0, 0.5rem, 0);
    transform: translate3d(0, 0.5rem, 0);
    visibility:visible;
  }

  75% {
    -webkit-transform: translate3d(0, -0.2rem, 0);
    transform: translate3d(0,  -0.2rem, 0);
    visibility:visible;
  }

  90% {
    -webkit-transform: translate3d(0, 0.1rem, 0);
    transform: translate3d(0, 0.1rem, 0);
    visibility:visible;
  }

  to {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
    visibility:visible;
  }
}

@keyframes opc {
  0% {
    opacity: 1;
  }
  20% {
    opacity: 0;
  }
  40% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}

@-webkit-keyframes opc {
  0% {
    opacity: 1;
  }
  20% {
    opacity: 0;
  }
  40% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}

.index{
  // min-height: 100%;
  position: relative;
  width: 10rem;
  margin: 0 auto;
  .obs-bg {
    display: block;
    width: 10rem;
    margin: 0 auto;
    height: 17.8rem;
    position: absolute;
    top: -0.7rem;
    left: 0;
  }
  .obs-tit {
    display: block;
    width: 4.95rem;
    position: absolute;
    top: 0.5rem;
    left: 50%;
    transform: translate(-50%,0%);
    -webkit-transform: translate(-50%,0%);
  }
  .star1 {
    display: block;
    width: 0.4rem;
    position: absolute;
    top: 2.3rem;
    left: 2.65rem;
    animation: opc 2s linear infinite;
    -webkit-animation: opc 2s linear infinite;
  }
  .star2 {
    display: block;
    width: 0.25rem;
    position: absolute;
    top: 2.7rem;
    left: 3rem;
    animation: opc 2s linear infinite;
    -webkit-animation: opc 2s linear infinite;
  }
  .star3 {
    display: block;
    width: 0.4rem;
    position: absolute;
    top:2.5rem;
    right: 2.8rem;
    animation: opc 2s linear infinite;
    -webkit-animation: opc 2s linear infinite;
  }
  .star4 {
    display: block;
    width: 0.25rem;
    position: absolute;
    top:2.25rem;
    right: 2.5rem;
    animation: opc 2s linear infinite;
    -webkit-animation: opc 2s linear infinite;
  }
  .btn {
    display: block;
    width: 7.8rem;
    position: absolute;
    left: 50%;
    margin-left: -3.9rem;
    visibility: hidden;
  }
  .btn1 {
    top: 5.6rem;
    animation: bounceInDown 1.4s;
    -webkit-animation: bounceInDown 1.4s;
    animation-fill-mode: forwards;
    -webkit-animation-fill-mode: forwards;
  }
  .btn2 {
    top: 8.2rem;
    animation: bounceInDown 1.4s;
    -webkit-animation: bounceInDown 1.4s;
    animation-delay: 0.3s;
    -webkit-animation-delay: 0.3s;
    animation-fill-mode: forwards;
    -webkit-animation-fill-mode: forwards;
  }
  .btn3 {
    top: 10.8rem;
    -webkit-animation: bounceInDown 1.4s;
    animation: bounceInDown 1.4s;
    -webkit-animation-delay: 0.6s;
    animation-delay: 0.6s;
    -webkit-animation-fill-mode: forwards;
    animation-fill-mode: forwards;
  }
  .logo {
    display: block;
    width: 2.15rem;
    position: absolute;
    top: 14rem;
    left: 50%;
    margin-left: -1.075rem;
  }
}

.index1 {
  padding: 0 0.32rem;
  .white-tit{
    color: #FFFFFF;
    font-size: 0.45rem;
    margin-top: 0.35rem;
  }
  .s-tit {
    color: #B3B3B3;
    font-size: 0.45rem;
  }
  .obs-line-txt{
    color: #B3B3B3;
    font-size: 0.37rem;
    padding: 0.2rem 0rem;
  }
  .white {
    color:#fff;
    font-weight: bold;
  }
  .green {
    color: #2BE1B0;
  }
  .obg-btn {
    display: block;
    width: 7.8rem;
    margin: 0 auto;
  }
  .index1-btn1 {
    margin-top: 0.7rem;
    position: relative;
    top: 0.1rem;
  }
  .gif {
    display: block;
    width: 9.07rem;
    margin: 0 auto;
    border-radius: 0.21rem;
    margin: 0.3rem 0;
  }
}

.index2 {
  padding: 0 0.32rem 1.2rem 0.32rem;
  .white-tit{
    color: #FFFFFF;
    font-size: 0.45rem;
    margin-top: 0.35rem;
  }
  .s-tit {
    color: #B3B3B3;
    font-size: 0.45rem;
    padding: 0.4rem 0 0.2rem 0;
  }
  .obs-line-txt{
    color: #B3B3B3;
    font-size: 0.37rem;
    padding: 0.2rem 0rem;
  }
  .white {
    color:#fff;
    font-weight: bold;
  }
  .green {
    color: #2BE1B0;
  }
  .obg-btn {
    display: block;
    width: 7.8rem;
    margin: 0 auto;
  }
  .index1-btn1 {
    margin-top: 0.7rem;
    position: relative;
    top: 0.1rem;
  }
  .gif {
    display: block;
    width: 9.07rem;
    margin: 0 auto;
    border-radius: 0.21rem;
    margin: 0.3rem 0;
  }
}

.index3 {
  padding: 0 0.32rem 1.2rem 0.32rem;
  .white-tit{
    color: #FFFFFF;
    font-size: 0.45rem;
    margin-top: 0.35rem;
  }
  .s-tit {
    color: #B3B3B3;
    font-size: 0.45rem;
    padding: 0.4rem 0 0.2rem 0;
  }
  .obs-line-txt{
    color: #B3B3B3;
    font-size: 0.37rem;
    padding: 0.2rem 0rem;
  }
  .white {
    color:#fff;
    font-weight: bold;
  }
  .green {
    color: #2BE1B0;
  }
  .green2 {
    color: #2BE1B0;
    line-height: 0.7rem;
    font-size: 0.32rem;
  }
  .obg-btn {
    display: block;
    width: 7.8rem;
    margin: 0 auto;
  }
  .index1-btn1 {
    margin-top: 0.7rem;
    position: relative;
    top: 0.1rem;
  }
  .gif {
    display: block;
    width: 9.07rem;
    margin: 0 auto;
    border-radius: 0.21rem;
    margin: 0.3rem 0;
  }
}