// ref: http://post.simplie.jp/posts/107
.sans-serif(@fz; @lh) {
  font: @fz/@lh -apple-system, BlinkMacSystemFont, 'Helvetica Neue', 'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
}

.sans(@fz; @lh) {
  font: @fz/@lh Georgia, 'Hiragino Mincho ProN', 'Yu Mincho', serif;
}