事件基督教12041204
第四次十字军与君士坦丁堡陷落（1204）Fourth Crusade and Sack of Constantinople (1204)
十字军转向攻陷拜占庭首都。H 轨：威尼斯利益与东西方裂痕加深；T 轨：东正巨大创伤记忆。Crusade diverted to sack Byzantine capital. H-track: Venetian interests and deepened East–West rupture; T-track: major Orthodox trauma memory.