注意样式必须写在最外层，且前缀为"/deep/ "，后面有一个空格，但这种用法好像已经弃用了
现在是用 :deep(className)

<style lang='scss' scoped>
.container{
	.item{
	}
}
/deep/ uni-progress {
	width: 160upx;
	
	.uni-progress-bar {
		border-radius: 6upx;
		.uni-progress-inner-bar {
			border-radius: 6upx;
		}
	}
}

:deep(.uni-progress-bar){

}
</style>