如何升级或降级套餐？

登录后进入「账户设置」>「订阅管理」，选择新的套餐即可。升级立即生效，降级将在当前计费周期结束后生效。

Log in and go to Account Settings > Subscription Management, then select a new plan. Upgrades take effect immediately, downgrades take effect at the end of the current billing cycle.