/* 全站装饰框：叠在内容之上、闪光之下；素材 assets/frame.png
 * 以视口高度为准等比缩放、上下顶满，避免 contain 在宽屏/窄屏上产生留边、卷轴“断层”感 */

.page-frame {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: auto;
  max-width: none;
  height: 100vh;
  min-height: 100vh;
  min-height: 100dvh;
  height: 100dvh;
  pointer-events: none;
  z-index: 150;
  box-sizing: border-box;
}