有人能帮我修复一个响应式的HTML手风琴吗？

<div class="accordion">
  <div class="accordion-item">
    <div class="accordion-header">标题1</div>
    <div class="accordion-content">内容1</div>
  </div>
  <div class="accordion-item">
    <div class="accordion-header">标题2</div>
    <div class="accordion-content">内容2</div>
  </div>
  <div class="accordion-item">
    <div class="accordion-header">标题3</div>
    <div class="accordion-content">内容3</div>
  </div>
</div>

.accordion {
  width: 100%;
}

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

.accordion-header {
  background-color: #f1f1f1;
  padding: 10px;
  cursor: pointer;
}

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

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

var accordionItems = document.querySelectorAll('.accordion-item');

accordionItems.forEach(function(item) {
  var header = item.querySelector('.accordion-header');
  var content = item.querySelector('.accordion-content');

  header.addEventListener('click', function() {
    item.classList.toggle('active');
  });
});