v3.26.1
Fair Value - Schedule of Assets Measured at Fair Value on Recurring Basis (Detail)
¥ in Thousands, $ in Thousands
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Short-term investment ¥ 124,713 $ 17,834 ¥ 0
Fair Value, Measurements, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash and cash equivalents 5,320,022   4,122,659
Short-term investment 124,713    
Debt Securities, Available-for-Sale 664,345    
Total 6,109,080   4,122,659
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Market for Identical Assets (Level 1) [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash and cash equivalents 5,320,022   4,122,659
Short-term investment 23,305    
Total 5,343,327   ¥ 4,122,659
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Short-term investment 101,408    
Debt Securities, Available-for-Sale 664,345    
Total ¥ 765,753