page {
		height: 100%;
		background-image: url('https://onlinekc.a.hlidc.cn/uploads/20241115/350f94aaf493d05625a7ddbc86c7804e.png');
		background-repeat: repeat;
		background-size: contain;
	}

如果不要重复

把background-repeat: repeat;替换background-repeat: no-repeat;