一覧、フィードのアイコン

<span class="dli-feed"></span>

.dli-feed {
  display: inline-block;
  vertical-align: middle;
  color: #333;
  line-height: 1;
  position: relative;
  width: 0.9em;
  height: 1em;
  border: 0.1em solid currentColor;
  border-radius: 0.1em;
  box-sizing: content-box;
}

.dli-feed::before, .dli-feed::after {
  content: '';
  position: absolute;
  top: 20%;
  left: 15%;
  height: 0.1em;
  background: currentColor;
  border-radius: 0.1em;
}

.dli-feed::before {
  width: 70%;
  box-shadow: 0 0.25em 0 0 currentColor;
}

.dli-feed::after {
  margin-top: 0.5em;
  width: 45%;
}