1px border / 1 pixel border / solution movement end 1px

Vue from the mobile terminal ui reference library vux

The core content follows

.setLine(@c: #C7C7C7) {
  content: " ";
  position: absolute;
  left: 0;
  top: 0;
  width: 200%;
  border: 1px solid @c;
  color: @c;
  height: 200%;
  transform-origin: left top;
  transform: scale(0.5);
}
.vux-1px {
  &:before {
    .setLine();
  }
}