Goodwill - Summary of goodwill (Parenthetical) (Details) - 12 months ended Dec. 31, 2025 ¥ in Thousands, $ in Thousands	USD ($)	CNY (¥)
Goodwill and Intangible Assets Disclosure [Abstract]
Business combination, acquired amount	$ 2,900	¥ 12,000

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 805
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration