.border-1px {  position: relative;}.border-1px:after {  position: absolute;  content: '';  top: -50%;  bottom: -50%;  left: -50%;  right: -50%;  -webkit-transform: scale(0.5);  transform: scale(0.5);  border-top: 1px solid #666;}@media (-webkit-min-device-pixel-radio: 1.5), (min-device-pixel-radio: 1.5) {  border-1px::after {    -webkit-transform: scaleY(0.7);    transform: scaleY(0.7);   }}@media (-webkit-min-device-pixel-radio: 2), (min-device-pixel-radio: 2) {  border-1px::after {    -webkit-transform: scaleY(0.5);    transform: scaleY(0.5);  }}