html, body{
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}


body{
  display: flex;
  justify-content: center;
  align-items: center;

  background: #eee;        
  overflow: hidden;
}


.poster{
  position: relative;

  width: 100%;
  height: 100%;

  max-width: 430px;        
  max-height: 932px;       

  overflow: hidden;
  border-radius: 3px;     

  background-image: url("../image/mobile-bg-1k5RLkhD.jpg");
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center top;
}

#tubiao{
  position: absolute;
  top: 15px;
  left: 15px;
  width: 250px;
}

#title{
  position: absolute;
  left: 50%;
  bottom: 85px;
  width: min(95vw,350px);
  transform: translateX(-50%);
}

.download{
  position: absolute;
  left: 50%;
  bottom: 10px;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
}

.download .btn{
  width: min(45vw,180px);
  display: block;
}