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Taxation - Schedule of Movement of valuation allowance (Detail) - CNY (¥)
¥ in Thousands
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax Disclosure [Abstract]      
Balance at beginning of the year ¥ (521,462) ¥ (476,022) ¥ (325,200)
Changes of valuation allowance 64,884 (45,440) (150,822)
Balance at end of the year ¥ (456,578) ¥ (521,462) ¥ (476,022)