.h1-preguntas {
    background: url("https://images.unsplash.com/photo-1465146633011-14f8e0781093?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=3450&q=80");
    background: url("../images/fondo-3.png");
    background-color: #BCE4FA;
    width: 100%;
    height: 220px;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 100px;
    perspective-origin: 100% 100%;
    animation: animation 125s linear infinite;
    margin-bottom: 1.3em;
    border: 0px;
  }

  .accordion-button {
    font-weight: 600;
  }