fix(script): 修复从其他页面切入时，关于页无法正确获取主机名的问题

src/content/spec/about.md

@@ -115,6 +115,7 @@ the error log is like driving with your eyes closed.
 - <a href="/assets/carbon-config.json" target="_blank">/public/assets/carbon-config.json</a> ：[Carbon 官网](https://carbon.now.sh) 配置文件。
 
 <script>
+    function getHostname(){
         // 主机名解析
         const hostname = window.location.hostname;
         const siteType = document.getElementById('cdns');
@@ -181,4 +182,11 @@ the error log is like driving with your eyes closed.
         else {
             hName.textContent = "本地 HTML 文件";
         }
+    }
+
+    // 兼容 Astro 的客户端导航与首次加载
+    document.addEventListener('astro:page-load', getHostname);
+    document.addEventListener('astro:after-swap', getHostname);
+    if (document.readyState !== 'loading') getHostname();
+    document.addEventListener('DOMContentLoaded', getHostname);
 </script>