Terms, short on purpose.条款，故意写短。

The PROOF pages are demos and explainers. They are not a promise that a solo round, a live split, or a receipt can already be run as a class. Class use follows the existing login.校样这些页面是演示和说明。它们不表示单人局、实时分派或底单已经可以拿来上课。上课仍走现有的登录。