/* v21 part1 */
(function () {
  'use strict';
  if (window.__mobV21) return;
  window.__mobV21 = true;
  function $(id) { return document.getElementById(id); }
  /* 撤销 v20 对 #login-form-container 的强制显示/隐藏干预：
     登录 UI 由 login-register-enhanced-component(组件版) 自行管理，
     避免双登录叠放。仅保留：游客模式 + 注册登录走 8001(真库)。 */
  var GUEST = 'v20_guest';
  function guestOn() {
    try { localStorage.setItem(GUEST, '1'); } catch (e) {}
    guestBar();
    var lc = $('login-form-container');
    if (lc && lc.style.display === 'flex') lc.style.display = 'none';
    var gl = document.querySelector('[id*="loginSection"],[id*="login-form-section"]');
    if (gl) { var p = gl.closest('[style*="flex"],.overlay,[class*="modal"],[class*="overlay"]'); if (p && p.style) p.style.display = 'none'; }
    location.reload();
  }
  function guestBar() {
    try {
      if ($('v21Bar')) return;
      var d = document.createElement('div');
      d.id = 'v21Bar';
      d.style.cssText = 'position:fixed;top:0;left:0;right:0;z-index:29000;background:#f1f5f9;color:#475569;font-size:12px;padding:6px 10px;display:flex;align-items:center;gap:8px;';
      d.innerHTML = '<span style="flex:1">👀 游客预览模式（只读体验）</span><a href="javascript:void(0)" id="v21GoLogin" style="color:#334155;text-decoration:underline">登录</a>';
      document.body.appendChild(d);
      var hd = document.querySelector('.mobile-header');
      if (hd) hd.style.marginTop = '32px';
      var gl = $('v21GoLogin');
      if (gl) gl.onclick = function () {
        try { localStorage.removeItem(GUEST); } catch (e) {}
        location.reload();
      };
    } catch (e) {}
  }
  function floatBtn() {
    if ($('v21Fab')) return;
    var fab = document.createElement('div');
    fab.id = 'v21Fab';
    fab.style.cssText = 'position:fixed;right:14px;bottom:76px;z-index:28000;font-size:12px;color:#334155;background:#fff;border:1px solid #cbd5e1;border-radius:18px;padding:7px 12px;box-shadow:0 2px 8px rgba(0,0,0,.12);cursor:pointer;';
    fab.textContent = localStorage.getItem(GUEST) === '1' ? '返回登录' : '👀 游客体验';
    fab.onclick = function () {
      if (localStorage.getItem(GUEST) === '1') {
        try { localStorage.removeItem(GUEST); } catch (e) {}
        location.reload();
      } else { guestOn(); }
    };
    document.body.appendChild(fab);
  }
  /* 自动：游客态显示顶条；底部悬浮按钮已废弃（v20260909：会遮住发送按钮，登录入口已改由顶部 header 登录钮/游客顶条承担） */
  function boot21() {
    try {
      if (localStorage.getItem(GUEST) === '1') { guestBar(); }
      console.log('[MobV21] ready');
    } catch (e) {}
  }
  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', boot21);
  else boot21();
  setTimeout(boot21, 1200);
  setTimeout(boot21, 3000);
})();