antd-mobile/2x/es/components/mask/mask.css

<img src="https://gw.alipayobjects.com/mdn/rms_ee68a8/afts/img/A*hjjDS5Yy-ooAAAAAAAAAAAAAARQnAQ" alt="logo" width="100%" />

.adm-mask {
  --z-index: var(--adm-mask-z-index, 1000);
  position: fixed;
  top: 0;
  left: 0;
  z-index: var(--z-index);
  display: block;
  width: 100%;
  height: 100%;
}

.adm-mask-aria-button {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
}

.adm-mask-content {
  z-index: 1;
}