a {
    text-decoration: none;
  }
  html {
    font-size: 50px;
  }
  p {
    margin: 0;
    padding: 0;
  }
  @media screen and (min-width: 320px) {
    html {
      font-size: 21.33333333px;
    }
  }
  @media screen and (min-width: 360px) {
    html {
      font-size: 24px;
    }
  }
  @media screen and (min-width: 375px) {
    html {
      font-size: 25px;
    }
  }
  @media screen and (min-width: 384px) {
    html {
      font-size: 25.6px;
    }
  }
  @media screen and (min-width: 400px) {
    html {
      font-size: 26.66666667px;
    }
  }
  @media screen and (min-width: 414px) {
    html {
      font-size: 27.6px;
    }
  }
  @media screen and (min-width: 424px) {
    html {
      font-size: 28.26666667px;
    }
  }
  @media screen and (min-width: 480px) {
    html {
      font-size: 32px;
    }
  }
  @media screen and (min-width: 540px) {
    html {
      font-size: 36px;
    }
  }
  @media screen and (min-width: 720px) {
    html {
      font-size: 48px;
    }
  }
  @media screen and (min-width: 750px) {
    html {
      font-size: 50px;
    }
  }
  
  html,
  body {
    height: 100%;
    min-height: 30.28rem;
    /* max-height: 30.28rem; */
  }
  
  body {
    min-width: 320px;
    width: 15rem;
    margin: 0 auto;
    line-height: 1.5;
    font-family: Arial, Helvetica;
    background: #fff;
  }
  
  .warp {
    position: relative;
    width: 15rem;
    height: 100%;
    margin: 0 auto;
    background: url("../img/bg.jpg") no-repeat;
    background-size: 100% auto;
  }
  
  .main {
    padding: 0.5rem;
  }
  
  .logo {
    width: 3.5rem;
    height: 3.5rem;
  }
  
  .footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 0.4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background-color: #fff;
  }
  
  .small-logo {
    width: 2.5rem;
    height: 2.5rem;
  }
  
  .dowmload-button {
    position: absolute;
    top: 16.0rem;
    left: 50%;
    margin-left: -3.96rem;
    width: 7.92rem;
    height: 3rem;
    animation: myBreath 1s linear infinite;
  }
  
  .dowmload-button3 {
    position: absolute;
    top: 3.5rem;
    left: 50%;
    margin-left: 4.26rem;
    width: 2.92rem;
    height: 3rem;
    animation: myBreath 1s linear infinite;
  }
  
  @keyframes myBreath {
    0% {
      transform: scale(0.88);
    }
    50% {
      transform: scale(100%);
    }
    100% {
      transform: scale(0.88);
    }
  }
  
  .tip {
    display: flex;
  }
  
  .tip-content {
    margin-left: 0.3rem;
   
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }
  
  .bit-game {
    font-size: 0.8rem;
  }
  
  .subtitle {
    font-size: 0.36rem;
    line-height: 0.6rem;
  }
  
  .dowmload {
    text-align: center;
    padding: 0.4rem;
    margin-right: 5px;
    font-size: 0.6rem;
    color: #fff;
    background: url("../img/btn_down2.png") no-repeat;
    background-size: 100% 100%;
  }
  
  /* @media only screen and (device-width: 375px) and (-webkit-device-pixel-ratio: 3) {
    .dowmload-button {
      top: 14.2rem;
    }
  } */
  
  /* @media screen and (min-width: 393px) {
    .dowmload-button {
      top: 14.8rem;
    }
  } */
  .logo,
  .small-logo {
    border-radius: 15px;
  }
  
  .dowmload-button2 {
    position: absolute;
    top: 0.5rem;
    left: 45%;
    margin-left: 4.26rem;
    width: 2.92rem;
    height: 3rem;
    animation: myBreath 1s linear infinite;
  }
  
  .dowmload-button2
  {
      width:80px;
      height:80px;
      line-height:36px;
      float:left;
      cursor:pointer;
      position:fixed;
      bottom:0;
      right:10px;
  }