/**app.wxss**/
.container {
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  padding: 200rpx 0;
  box-sizing: border-box;
} 
page {
  display: flex;
  flex-direction: column;
  height: 100vh;          /* 限制最高为屏幕高度 */
  overflow: hidden;
}