app/node_modules/ng-zorro-antd/qr-code/style/index.css

/* stylelint-disable at-rule-empty-line-before,at-rule-name-space-after,at-rule-no-unknown */
/* stylelint-disable no-duplicate-selectors */
.ant-qrcode {
  position: relative;
  display: inline-block;
  padding: 12px;
}
.ant-qrcode > canvas {
  display: block;
}
.ant-qrcode-border {
  border: 1px solid #f0f0f0;
  border-radius: 2px;
}
.ant-qrcode-mask {
  position: absolute;
  top: 0;
  right: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  text-align: center;
  background-color: rgba(255, 255, 255, 0.96);
}
.ant-qrcode-expired {
  color: rgba(0, 0, 0, 0.85);
}