可打开的手风琴并排都会在单击手风琴时展开，如何只打开被单击的手风琴？

// 获取所有手风琴元素
var accordions = document.querySelectorAll('.accordion');

// 为每个手风琴设置点击事件监听器
accordions.forEach(function(accordion) {
  accordion.addEventListener('click', function() {
    // 判断当前手风琴是否已经展开
    var isExpanded = this.getAttribute('aria-expanded') === 'true';

    // 关闭所有已展开的手风琴
    accordions.forEach(function(acc) {
      acc.setAttribute('aria-expanded', 'false');
      acc.nextElementSibling.style.maxHeight = null;
    });

    // 如果当前手风琴尚未展开，则展开它
    if (!isExpanded) {
      this.setAttribute('aria-expanded', 'true');
      this.nextElementSibling.style.maxHeight = this.nextElementSibling.scrollHeight + 'px';
    }
  });
});

<div class="accordion" aria-expanded="false">
  <div class="accordion-header">手风琴标题</div>
  <div class="accordion-content">
    手风琴内容
  </div>
</div>