/**app.wxss**/
.container {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20rpx 0;
  box-sizing: border-box;
  opacity: 0.78;
} 

page {
  height: 100%;
}

.bg-img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}