.aside_left {
  display: none;
  position: fixed;
  left: 18%;
  top: 30%;
  border: 1px solid #ccc;
}
.aside_left li {
  border-bottom: 1px solid #ccc;
}
.aside_left li:last-child {
  border-bottom: none;
}
.aside_left li a {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: #000;
  padding: 7px 6px;
}
.aside_left a:hover {
  color: #d22222;
}