使用<accordion>将向上/向下箭头添加到引导手风琴

<div class="accordion">
  <div class="accordion-item">
    <div class="accordion-header">Section 1</div>
    <div class="accordion-content">Content 1</div>
  </div>
  <div class="accordion-item">
    <div class="accordion-header">Section 2</div>
    <div class="accordion-content">Content 2</div>
  </div>
  <div class="accordion-item">
    <div class="accordion-header">Section 3</div>
    <div class="accordion-content">Content 3</div>
  </div>
</div>

.accordion {
  width: 100%;
}

.accordion-item {
  border: 1px solid #ccc;
  margin-bottom: 10px;
}

.accordion-header {
  background-color: #f5f5f5;
  padding: 10px;
  cursor: pointer;
}

.accordion-content {
  padding: 10px;
  display: none;
}

.accordion-item.active .accordion-content {
  display: block;
}

.accordion-header::after {
  content: '\25BC';
  float: right;
}

.accordion-item.active .accordion-header::after {
  content: '\25B2';
}

$(document).ready(function() {
  $('.accordion-header').click(function() {
    $(this).parent().toggleClass('active');
  });
});