naver_nav_css.css

.more {
  display:block;
  width: 55px;
  height: 16px;
  background-image:url('https://s.pstatic.net/static/www/img/2017/sp_nav_v170523.png');
  background-position: 0 -78px;
}

.blind {
  position: absolute;
  overflow: hidden;
  clip: rect(0 0 0 0);
  margin: -1px;
  width: 1px;
  height: 1px;
}