body {
  background-color: #666;
  display: flex;
  align-items: center;
  justify-content: center;
}

div {
  position: fixed;
  bottom: 0;
  z-index: 1000;
  display: flex;
  width: 100%;
  height: 30vh;
  pointer-events: none;
  background-image: linear-gradient(to bottom,rgba(255, 255, 255, 0),rgba(0, 0, 0, 0.9));
  justify-content: center;
}

a {
  pointer-events: all;
  border-radius: 4px;
  box-shadow: 0 0 0 0 rgba(255, 134, 37, 0.7);
  width: 140px;
  height: 40px;
  background: #ff8625;
  color: #fff;
  display: block;
  line-height: 40px;
  text-align: center;
  font-size: 16px;
  margin-top: 30px;
  text-decoration: none;
  animation-name: pulse;
  animation-duration: 1.25s;
  animation-timing-function: ease-in;
  animation-iteration-count: 3;
  animation-delay: 2s;
}

@keyframes pulse {
  100% {
    box-shadow: 0 0 10px 35px rgba(255, 255, 255, 0);
  }
}