span.blink_paragraph {
  animation: blinkEffect 2s ease infinite;
}


@keyframes blinkEffect {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

/*  <p class="blink_paragraph bold">10型サイズで20型並みの高性能！</p>  */


.red { font-color:red; }