bottom fade css

ol {
  border: 1px #d8d8d8  dashed;
  font: 2em/1.6em Arial;
  position: relative;
}

ol:after {
  content: "";
  position: absolute;
  z-index: 1;
  bottom: 0;
  left: 0;
  pointer-events: none;
  background-image: linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255, 1) 90%);
  width: 100%;
  height: 4em;
}

<ol>
  <li>item1</li>
  <li>item2</li>
  <li>item3</li>
  <li>item4</li>
  <li>item5</li>
</ol>