.start-content { text-align: center; left: 0; right: 0; position: fixed; bottom: 45%; .images { padding-bottom: 50rpx; width: 200rpx; height: 200rpx; } .app-name { font-weight: bold; font-size: 55rpx; color: #666666; } } .load-class { position: fixed; bottom: 30rpx; width: 100%; }