.ul-download {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: left;
}

.ul-download > li {
  padding: 5px 0;
}

.file-down {
  display: inline-block;
  position: relative;
  padding-left: 16px;
  font-weight: 500;
  font-size: 15px;
  line-height: 24px;
  color: #000e2d;
  text-decoration: none;
  background-image: url('/_res/unist/chemistry/img/content/icon_down.png'); 
  background-repeat: no-repeat;
  background-position: left center;
  background-size: 10px;
  transition: all 0.3s;
}

.file-down:hover {
  text-decoration: underline;
  color: #004bae;
}