(function () {
  'use strict';
  var mobile = document.getElementById('mobileMenuBtn');
  var navMenu = document.querySelector('.nav-menu');
  var navRight = document.querySelector('.nav-right');
  var mobileViewport = window.matchMedia('(max-width: 768px)');
  var navItems = [];
  function setNavOpen(item, open) {
    if (open) navItems.forEach(function (other) { if (other !== item) setNavOpen(other, false); });
    item.dropdown.classList.toggle('active', open);
    item.link.setAttribute('aria-expanded', String(open));
  }
  function closeNavMenus() { navItems.forEach(function (item) { setNavOpen(item, false); }); }
  function setMobileOpen(open) {
    if (navMenu) navMenu.classList.toggle('active', open);
    if (navRight) navRight.classList.toggle('active', open);
    if (mobile) mobile.setAttribute('aria-expanded', String(open));
    if (!open) closeNavMenus();
  }
  document.querySelectorAll('.nav-menu > div > a').forEach(function (link) {
    var dropdown = link.parentElement.querySelector('.nav-cont');
    if (!dropdown) return;
    var item = { link: link, dropdown: dropdown, parent: link.parentElement };
    navItems.push(item);
    dropdown.id = 'static-nav-dropdown-' + navItems.length;
    link.setAttribute('aria-controls', dropdown.id);
    setNavOpen(item, false);
    link.addEventListener('click', function (event) {
      event.preventDefault();
      var toggle = mobileViewport.matches || event.detail === 0;
      setNavOpen(item, !toggle || link.getAttribute('aria-expanded') !== 'true');
    });
    link.addEventListener('keydown', function (event) {
      if (event.key === ' ' || event.key === 'ArrowDown') {
        event.preventDefault();
        setNavOpen(item, event.key === 'ArrowDown' || link.getAttribute('aria-expanded') !== 'true');
        var first = dropdown.querySelector('a[href]');
        if (event.key === 'ArrowDown' && first) first.focus();
      }
    });
    item.parent.addEventListener('mouseenter', function () { if (!mobileViewport.matches) setNavOpen(item, true); });
    item.parent.addEventListener('mouseleave', function () { if (!mobileViewport.matches && !item.parent.contains(document.activeElement)) setNavOpen(item, false); });
    item.parent.addEventListener('focusout', function (event) {
      var next = event.relatedTarget;
      if (!item.parent.contains(next) && (!mobileViewport.matches || !navMenu.contains(next))) setNavOpen(item, false);
    });
  });
  if (mobile) {
    mobile.setAttribute('role', 'button'); mobile.tabIndex = 0;
    mobile.setAttribute('aria-expanded', 'false');
    if (navMenu) { navMenu.id = 'static-nav-menu'; mobile.setAttribute('aria-controls', navMenu.id); }
    mobile.addEventListener('click', function () { setMobileOpen(!navMenu.classList.contains('active')); });
    mobile.addEventListener('keydown', function (event) {
      if (event.key === 'Enter' || event.key === ' ') { event.preventDefault(); mobile.click(); }
    });
  }
  document.addEventListener('click', function (event) { if (navMenu && !navMenu.contains(event.target) && !mobile?.contains(event.target)) closeNavMenus(); });
  document.addEventListener('keydown', function (event) {
    if (event.key !== 'Escape') return;
    var open = navItems.find(function (item) { return item.link.getAttribute('aria-expanded') === 'true'; });
    if (open) { closeNavMenus(); open.link.focus(); }
    else if (mobileViewport.matches && navMenu?.classList.contains('active')) { setMobileOpen(false); mobile?.focus(); }
  });
  mobileViewport.addEventListener('change', function () { setMobileOpen(false); });
  document.querySelectorAll('.language-selected').forEach(function (button) {
    button.setAttribute('role', 'button'); button.tabIndex = 0; button.setAttribute('aria-haspopup', 'true');
    function toggle(event) { event.stopPropagation(); button.closest('.language-selector').classList.toggle('active'); }
    button.addEventListener('click', toggle);
    button.addEventListener('keydown', function (event) { if (event.key === 'Enter' || event.key === ' ') { event.preventDefault(); toggle(event); } });
  });
  document.addEventListener('click', function () { document.querySelectorAll('.language-selector.active').forEach(function (element) { element.classList.remove('active'); }); });

  if (window.Swiper) document.querySelectorAll('.swiper, .swiper-container').forEach(function (element) {
    if (element.swiper || !element.querySelector('.swiper-wrapper')) return;
    var count = element.querySelectorAll('.swiper-slide').length;
    new window.Swiper(element, { loop: count > 1, speed: 550, autoplay: count > 1 ? { delay: 6000, disableOnInteraction: false } : false, pagination: { el: element.querySelector('.swiper-pagination'), clickable: true }, navigation: { nextEl: element.querySelector('.swiper-button-next'), prevEl: element.querySelector('.swiper-button-prev') } });
  });
  document.querySelectorAll('.country-item').forEach(function (item) {
    item.addEventListener('click', function () {
      var siblings = Array.from(item.parentElement.children); var index = siblings.indexOf(item);
      siblings.forEach(function (sibling) { sibling.classList.toggle('active', sibling === item); });
      item.parentElement.parentElement.querySelectorAll('.hot-list').forEach(function (list, i) { list.classList.toggle('active', i === index); });
    });
  });
  document.querySelectorAll('[data-local-filter]').forEach(function (input) {
    input.addEventListener('input', function () {
      var query = input.value.toLowerCase().trim();
      document.querySelectorAll('[data-filter-row]').forEach(function (row) { row.hidden = query && !row.textContent.toLowerCase().includes(query); });
    });
  });
  var search = document.getElementById('document-input');
  var searchButton = document.querySelector('.input-search .search-btn');
  if (search && searchButton) {
    function navigateSearch() { var target = new URL(search.dataset.results || 'document-result.html', location.href); target.searchParams.set('search', search.value.trim()); location.href = target.href; }
    searchButton.setAttribute('role', 'button'); searchButton.tabIndex = 0;
    searchButton.addEventListener('click', navigateSearch);
    search.addEventListener('keydown', function (event) { if (event.key === 'Enter') { event.preventDefault(); navigateSearch(); } });
  }
  var searchData = document.getElementById('static-search-data');
  var results = document.getElementById('static-search-results');
  var queryInput = document.getElementById('static-search-query');
  if (searchData && results && queryInput) {
    var data = JSON.parse(searchData.textContent); var params = new URLSearchParams(location.search); queryInput.value = params.get('search') || '';
    function renderSearch() {
      var query = queryInput.value.trim().toLowerCase(); results.replaceChildren();
      var found = data.items.filter(function (item) { return !query || (item.title + ' ' + item.text).toLowerCase().includes(query); });
      found.forEach(function (item) { var li = document.createElement('li'); var link = document.createElement('a'); link.href = item.href; link.textContent = item.title; li.append(link); results.append(li); });
      if (!found.length) { var li = document.createElement('li'); li.textContent = data.empty; results.append(li); }
    }
    document.getElementById('static-search-form').addEventListener('submit', function (event) { event.preventDefault(); var url = new URL(location.href); url.searchParams.set('search', queryInput.value.trim()); history.replaceState(null, '', url); renderSearch(); });
    queryInput.addEventListener('input', renderSearch); renderSearch();
  }
  document.querySelectorAll('.static-article img, .practice img').forEach(function (img) {
    img.style.cursor = 'zoom-in'; img.addEventListener('click', function () {
      var dialog = document.createElement('dialog'); dialog.className = 'static-lightbox';
      var close = document.createElement('button'); close.type = 'button'; close.setAttribute('aria-label', document.documentElement.lang === 'en' ? 'Close' : '关闭'); close.textContent = '\u00d7';
      var picture = document.createElement('img'); picture.src = img.src; picture.alt = img.alt;
      dialog.append(close, picture); document.body.append(dialog); close.addEventListener('click', function () { dialog.close(); });
      dialog.addEventListener('click', function (event) { if (event.target === dialog) dialog.close(); });
      dialog.addEventListener('close', function () { dialog.remove(); }); dialog.showModal();
    });
  });
})();