swiper {
  width: 100vw;
  height: 100vh;
}
swiper-item {
  width: 100vw;
  height: 100vh;
}
image {
  width: 100vw;
  height: 100vh;
}
.btn {  
  position: absolute;  
  left: 0;  
  right: 0;  
  bottom: 50rpx;  
  display: flex;  
  justify-content: center;  
}