.sitemap {
  list-style: none;
  padding: 0 30px;
}

.sitemap li a {
  display: block;
  padding: 5px 10px 5px 20px;
  background-repeat: no-repeat;
  background-position: left;
  background-image: url("../img/sitemap/arrow.png");
}

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 2dppx) {
  .sitemap li a {
    background-image: url("../img/sitemap/arrow@2x.png");
    background-size: 4px auto;
  }
}