comment/src/components/CommentList/index.css

.showMore {
  color: #4a90e2;
  text-align: center;
  width: 100%;
  background-color: #f8f8f8;
  cursor: pointer;
  padding: 10px;
  margin: 40px auto;
  transition: all 0.3s;
}
.showMore:hover {
  background-color: #f5f5f5;
  color: #1890ff;
}