diff --git a/public/index.html b/public/index.html
index f86eeb1..ad6e9be 100644
--- a/public/index.html
+++ b/public/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="en" class="dark">
+<html lang="zh-CN" class="light">
 <head>
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
@@ -143,7 +143,7 @@
           <path id="themeIconPath" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M20.354 15.354A9 9 0 018.646 3.646 9.003 9.003 0 0012 21a9.003 9.003 0 008.354-5.646z"></path>
         </svg>
       </button>
-      <a href="https://github.com/journey-ad/gemini-watermark-remover" target="_blank" class="hover:text-primary transition-colors">GitHub</a>
+      <a href="http://git.unissense.tech/mula/gemini_watermark_cleaner" target="_blank" class="hover:text-primary transition-colors">GitHub</a>
       <button id="langSwitch" class="px-3 py-1 border border-border rounded hover:bg-surface text-primary transition-colors">EN</button>
     </nav>
   </header>
@@ -260,7 +260,7 @@
       </div>
       <div class="flex gap-6">
         <a href="terms.html" class="hover:text-primary transition-colors" data-i18n="footer.terms">Terms</a>
-        <a href="https://github.com/journey-ad/gemini-watermark-remover" target="_blank" class="hover:text-primary transition-colors">GitHub</a>
+        <a href="http://git.unissense.tech/mula/gemini_watermark_cleaner" target="_blank" class="hover:text-primary transition-colors">GitHub</a>
       </div>
     </div>
   </footer>
diff --git a/src/app.js b/src/app.js
index 0680169..4e65b6c 100644
--- a/src/app.js
+++ b/src/app.js
@@ -90,10 +90,10 @@ function setupThemeToggle() {
 
     // Load from storage
     const savedTheme = localStorage.getItem('theme');
-    if (savedTheme === 'light') {
-        html.classList.remove('dark');
-        html.classList.add('light');
-        iconPath.setAttribute('d', moonPath);
+    if (savedTheme === 'dark') {
+        html.classList.remove('light');
+        html.classList.add('dark');
+        iconPath.setAttribute('d', sunPath);
     }
 }
 
diff --git a/src/i18n.js b/src/i18n.js
index 4667abb..365e825 100644
--- a/src/i18n.js
+++ b/src/i18n.js
@@ -1,5 +1,5 @@
 const i18n = {
-  locale: localStorage.getItem('locale') || (navigator.language.startsWith('zh') ? 'zh-CN' : 'en-US'),
+  locale: localStorage.getItem('locale') || 'zh-CN',
   translations: {},
 
   async init() {
