// 移动端导航开关
(function () {
  var toggle = document.getElementById('navToggle');
  var nav = document.getElementById('topNav');
  if (toggle && nav) {
    toggle.addEventListener('click', function () {
      nav.classList.toggle('open');
    });
    nav.querySelectorAll('a').forEach(function (a) {
      a.addEventListener('click', function () {
        nav.classList.remove('open');
      });
    });
  }
})();