ul.contact > li::after,
  ul li.contact::after      { mask-image: url(https://ketri.al/pub/file/0a28f080/d2e621ae/icon-contact-form.svg);  }

  ul.slider > li::after,
  ul li.slider::after       { mask-image: url(https://ketri.al/pub/file/0a28f080/b717c90f/icon-layout.svg);   }

  ul.gallery > li::after,
  ul li.gallery::after      { mask-image: url(https://ketri.al/pub/file/0a28f080/8de4cc3b/icon-gallery.svg);  }