FRTB (Fundamental Review of the Trading Book) significantly redefined the boundary between the trading book and banking book as a core component of market risk capital reform. Walk me through the key changes FRTB introduced to this boundary definition and the underlying regulatory logic. How do these changes impact banks' market risk capital requirements and their day-to-day risk management practices?

FRTB (Fundamental Review of the Trading Book) 对银行的交易账簿边界重新定义，是市场风险资本计量改革的核心之一。请你详细阐述FRTB框架下交易账簿边界划分的主要变化及其背后的监管逻辑，并分析这些变化将如何影响银行的市场风险资本要求和日常风险管理实践。