diff --git a/index.html b/index.html
index fa4c961..0d5436d 100644
--- a/index.html
+++ b/index.html
@@ -9,6 +9,16 @@
     <meta name="keywords" content="quarkd、quark design、web components、webcomponents、组件库、跨技术栈、跨技术栈组件库、customelement、custom element、移动端组件库">
     <meta name="description" content="基于 Quark Design 设计体系的跨技术栈移动端组件库。">
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/@docsearch/css@3" />
+
+    <!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-VPD45X3FFK"></script>
+<script>
+  window.dataLayer = window.dataLayer || [];
+  function gtag(){dataLayer.push(arguments);}
+  gtag('js', new Date());
+
+  gtag('config', 'G-VPD45X3FFK');
+</script>
   </head>
   <body>
     <div id="doc"></div>
