Make rectangle away from title

Store Design
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2 
@media only screen and (max-width: 749px) {
  .banner__heading::after {
    content: '';
    position: absolute;
    bottom: 50%;
    left: 50%;
    transform: translate(-50%, 50%);
    width: 62%;
    height: 10px;
    background-color: rgba(255, 255, 255, 0.35);
    box-shadow: 0 10px 60px rgba(255, 255, 255, 1), 0 10px 60px rgba(255, 255, 255, 1), 0 10px 60px rgba(255, 255, 255, 1), 0 10px 60px rgba(255, 255, 255, 1);
    transition: 0.4s ease;
  }
  .banner__buttons .button--secondary {
    box-shadow: 0 0 8px 4px rgba(255, 255, 255, 0.46);
  }