body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  width: 100vw;
  height: 100vh;
}

iframe {
  width: 100%;
  height: 100vh;
  max-width: 100vw;
  max-height: 100vh;
  margin: 0;
  padding: 0;
  border: none;
  box-sizing: border-box;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1; /* 添加较低的 z-index */
}

/* 在较窄的屏幕上额外保证全屏显示 */
@media screen and (max-width: 900px) {
  iframe {
    width: 100vw;
    height: 100vh;
    min-height: 100vh;
  }
}