.post-announce {
  text-align: center;
  width: 85%;
  border-bottom: solid 1px #ebebeb;

  margin: 1em auto;
}
.post-announce:last-of-type { border-bottom: none; }

.post-announce > a > img { max-width: 100%; }


@media (min-width: 950px) {

  .post-announce { width: 50em; }
}