v3.26.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of disaggregated revenue by types (Detail)
¥ in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Disaggregation of Revenue [Line Items]        
Revenues ¥ 6,146,772 $ 878,977 ¥ 4,553,556 ¥ 2,960,813
Learning Services        
Disaggregation of Revenue [Line Items]        
Revenues 6,039,033   4,419,964 2,872,901
Educational Content and Digitalized Learning Products        
Disaggregation of Revenue [Line Items]        
Revenues 77,089   83,930 55,980
Other Revenue        
Disaggregation of Revenue [Line Items]        
Revenues ¥ 30,650   ¥ 49,662 ¥ 31,932