sogou_site_verification: sogou-verification-code-here

<!-- TC_SOURCE_PERSO -->
<script>
(function(){
  // Detect traffic source: utm_source param > referrer
  function detectSource(){
    try{
      var p = new URLSearchParams(window.location.search);
      var utm = p.get('utm_source') || p.get('utm_medium');
      if(utm) return String(utm).toLowerCase();
    }catch(e){}
    try{
      var r = document.referrer || '';
      if(!r) return 'direct';
      if(r.indexOf('google.')>-1) return 'google';
      if(r.indexOf('bing.')>-1) return 'bing';
      if(r.indexOf('baidu.')>-1) return 'baidu';
      if(r.indexOf('weixin.')>-1 || r.indexOf('wechat')>-1 || r.indexOf('qq.com')>-1) return 'wechat';
      if(r.indexOf('twitter.')>-1 || r.indexOf('x.com')>-1) return 'twitter';
      if(r.indexOf('facebook.')>-1) return 'facebook';
      if(r.indexOf('zhihu.')>-1) return 'zhihu';
      if(r.indexOf('xiaohongshu')>-1 || r.indexOf('xiaohongshu.com')>-1) return 'xiaohongshu';
      var host = r.replace(/^https?:\/\//,'').split('/')[0];
      return host || 'referral';
    }catch(e){ return 'direct'; }
  }

  // Source -> CTA + headline message map (message match)
  var MESSAGES = {
    google:     { cta: '查看深度解析', sub: '来自搜索引擎的专业内容库' },
    bing:       { cta: '了解完整方案', sub: '系统化的专业知识集合' },
    baidu:      { cta: '立即阅读', sub: '权威可靠的中文内容资源' },
    wechat:     { cta: '收藏并分享', sub: '微信用户都在看的专业内容' },
    weixin:     { cta: '收藏并分享', sub: '微信用户都在看的专业内容' },
    twitter:    { cta: '深度阅读', sub: '高质量深度内容精选' },
    facebook:   { cta: '阅读全文', sub: '值得分享的专业知识' },
    zhihu:      { cta: '继续深入了解', sub: '专业社区认可的内容' },
    xiaohongshu:{ cta: '去了解', sub: '好物与知识分享' },
    direct:     { cta: '立即体验', sub: '欢迎访问数字枢纽' },
    referral:   { cta: '立即体验', sub: '经推荐访问数字枢纽' }
  };

  function apply(){
    var src = detectSource();
    var m = MESSAGES[src] || MESSAGES.direct;
    // 1. Update primary CTA buttons
    var ctas = document.querySelectorAll('.cta-btn, .btn-primary, [data-cta], a[href*="free-trial"], a[href*="conversions"]');
    for(var i=0;i<ctas.length;i++){
      var el = ctas[i];
      var original = el.getAttribute('data-orig-text') || el.textContent;
      el.setAttribute('data-orig-text', original);
      if(el.getAttribute('data-personalized')!=='1'){
        el.textContent = m.cta;
        el.setAttribute('data-personalized','1');
        el.setAttribute('data-source', src);
      }
    }
    // 2. Update hero/lead subtext if present
    var hero = document.querySelector('.hero-sub, .lead-text, [data-hero-sub]');
    if(hero && hero.getAttribute('data-personalized')!=='1'){
      hero.textContent = m.sub;
      hero.setAttribute('data-personalized','1');
    }
    // 3. Track source
    try{ navigator.sendBeacon('/api/track', JSON.stringify({type:'source_visitor', source:src, url:location.href, ts:Date.now()})); }catch(e){}
  }

  if(document.readyState==='complete'){ apply(); }
  else { window.addEventListener('load', apply); }
})();
</script>
<!-- TC_SOURCE_PERSO_END -->