message: fix(theme): fix blog hero slidedown button
diff: display: none;
  position: absolute;
  - left: calc(50vw - 40px);
  + left: calc(50vw - 30px);
  bottom: 0;
  width: 60px;
  padding: 10px;
  .icon {
  - width: 25px;
  - margin: -10px 10px;
  + width: 30px;
  + margin: -15px 0px;
  animation-name: bounce-down;
  animation-duration: 1.5s;
  animation-timing-function: linear;
  