arXiv：自动展开折叠区块

// Auto-expand collapsed sections (Comments, MSC class, ACM class)
(function () {
  function expand() {
    document.querySelectorAll('details:not([open])').forEach(function (d) {
      d.open = true;
    });
    document.querySelectorAll('.comments, .msc-classes, .acm-classes, .keywords').forEach(function (el) {
      el.style.display = 'block';
      el.removeAttribute('hidden');
    });
    document.querySelectorAll('a, button').forEach(function (el) {
      if (el.dataset.jzArxExp) { return; }
      var t = (el.textContent || '').toLowerCase().trim();
      if (/^(show|expand|view|more) (comments|details|metadata)/.test(t)) {
        el.dataset.jzArxExp = '1';
        el.click();
      }
    });
  }
  expand();
  new MutationObserver(function () {
    clearTimeout(window.__jzArxExp);
    window.__jzArxExp = setTimeout(expand, 350);
  }).observe(document.body, { childList: true, subtree: true });
})();