Share-based Compensation - Summary of Share-based Compensation Expenses Relating to RSUs Recognized (Detail) ¥ in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2025 CNY (¥)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 CNY (¥)	Dec. 31, 2023 CNY (¥)
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expenses	¥ 246,158	$ 35,200	¥ 273,124	¥ 151,485
Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expenses	246,158	35,200	273,124	151,485
Cost of revenues [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expenses	416	59	0	0
Sales and marketing expenses [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expenses	45,537	6,512	65,597	18,958
General and administrative expenses [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expenses	154,838	22,142	134,984	79,327
Research and development expenses [Member] \| Restricted Stock Units (RSUs) [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based compensation expenses	¥ 45,367	$ 6,487	¥ 72,543	¥ 53,200