LiDa_Search/css/collapsemod.css

 @charset "UTF-8";
/* custom.css   */ 

  .module {
    position: relative;
  }

  .module .collapse, .module .collapsing {
    height: 4.5rem; /* By default 5 */
  }

  .module .collapse {
    display: block; /* By default the bootstrap collapse has a display: none*/
    overflow: hidden;
  }

  .module .collapse.show {
    height: auto;
  }

  .read-more {
    position: absolute;
    top: 1.6rem;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1;

    /* 60% is where it should start the transition from transparent to white, increase it if you want to show more of your text*/
    background-image: linear-gradient(to bottom, transparent 5%, white);

    /* The opacity and transition is just to smooth out the effect */
    opacity: 1;
    transition: all .3s linear;
  }

  .read-more:not(.collapsed) {
    opacity: 0;
	/*  you want to make the clickable area disapear once it is open, change the visibility to hidden:*/
    /* visibility: hidden; */
  }