v3.26.1
ORGANIZATION AND PRINCIPAL ACTIVITIES - Summary of financial information of VIE and VIE's subsidiaries after elimination of inter-company transactions and balances (Detail)
¥ in Thousands, $ in Thousands
 12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Dec. 31, 2025
USD ($)
Variable Interest Entity [Line Items]          
Cash and cash equivalents ¥ 596,195   ¥ 1,321,118   $ 85,255
Restricted cash 115,828   5,222   16,563
Short-Term Investments 2,708,788   1,845,242   387,352
Inventory, net 54,950   36,401   7,858
Prepaid expenses and other current assets, net 504,779   431,829   72,182
Total current assets 3,980,540   3,639,812   569,210
Operating lease right-of-use assets 476,705   503,601   68,168
Property, equipment and software, net 1,009,132   670,237   144,304
Intangible assets, net 42,388   17,984   6,061
Land use rights, net 78,105   25,762   11,169
Long-Term Investments 551,641   922,740   78,884
Goodwill 11,060   331 ¥ 331 1,582
Rental deposit 49,199   45,834   7,035
Other non-current assets 916   1,776   131
TOTAL ASSETS 6,199,686   5,828,077   886,544
Short-term borrowings 100,000   0   14,300
Accrued expenses and other current liabilities 1,537,477   1,245,207   219,856
Amount due to related party 181,757   0   25,991
Deferred revenue, current portion 2,289,322   1,867,096   327,369
Operating lease liabilities, current portion 136,709   147,635   19,549
Income tax payable 222   665   32
Total current liabilities 4,245,487   3,260,603   607,097
Deferred revenue, non-current portion 276,620   218,797   39,556
Operating lease liabilities, non-current portion 316,703   344,609   45,288
Deferred tax liabilities 75,248   70,604   10,760
Long-term borrowings 31,883   0   4,559
TOTAL LIABILITIES 4,945,941   3,894,613   $ 707,260
Net revenues 6,146,772 $ 878,977 4,553,556 2,960,813  
Net Income (Loss) (323,307) (46,232) (1,048,954) (7,298)  
Net cash generated from operating activities 416,094 59,501 258,007 353,697  
Net cash (used in)/generated from investing activities (818,783) (117,084) 620,821 (423,978)  
Net cash generated from financing activities (214,140) $ (30,622) (205,302) (90,480)  
Variable Interest Entity, Primary Beneficiary [Member]          
Variable Interest Entity [Line Items]          
Cash and cash equivalents 514,955   496,489    
Restricted cash 115,828   5,222    
Short-Term Investments 2,083,401   593,393    
Inventory, net 54,950   36,401    
Prepaid expenses and other current assets, net 399,829   392,016    
Total current assets 3,168,963   1,523,521    
Operating lease right-of-use assets 448,837   460,193    
Property, equipment and software, net 960,856   622,641    
Intangible assets, net 16,697   17,984    
Land use rights, net 78,105   25,762    
Long-Term Investments 64,393   727,571    
Goodwill 331   331    
Rental deposit 36,297   33,688    
Other non-current assets 742   1,424    
Total non-current assets 1,606,258   1,889,594    
TOTAL ASSETS 4,775,221   3,413,115    
Short-term borrowings 100,000   0    
Accrued expenses and other current liabilities 1,131,781   811,879    
Amount due to related party 181,757        
Deferred revenue, current portion 2,288,255   1,867,096    
Operating lease liabilities, current portion 129,258   114,471    
Income tax payable 171   606    
Total current liabilities 3,831,222   2,794,052    
Deferred revenue, non-current portion 276,620   218,797    
Operating lease liabilities, non-current portion 309,940   337,258    
Deferred tax liabilities 75,248   70,316    
Long-term borrowings 31,883   0    
Total non-current liabilities 693,691   626,371    
TOTAL LIABILITIES 4,524,913   3,420,423    
Net revenues 6,126,081   4,552,921 2,960,813  
Net Income (Loss) 717,230   39,838 598,211  
Net cash generated from operating activities 1,450,232   1,227,747 919,990  
Net cash (used in)/generated from investing activities (1,075,743)   896,344 (1,157,633)  
Net cash generated from financing activities ¥ 129,220   ¥ 0 ¥ 0