/* /assets/css/custom.css */


.accordion-button:not(.collapsed) {
  background-color: rgb(255, 123, 0);
  color: white;
  box-shadow: none;
}

.accordion-button:focus {
  box-shadow: none;
}


<!-- in _layouts/default.html or specific page -->
<style>
  ::-webkit-scrollbar {
    width: 16px;
  }

  ::-webkit-scrollbar-thumb {
    background: #999;
    border-radius: 6px;
  }
</style>