diff --git a/public/robots.txt b/public/robots.txt
index c2aab7e..b733401 100644
--- a/public/robots.txt
+++ b/public/robots.txt
@@ -1,2 +1,14 @@
+# ConvertX-CN robots.txt
+# 允許所有搜尋引擎爬蟲抓取網站內容
+
User-agent: *
-Disallow: /
\ No newline at end of file
+Allow: /
+
+# 禁止抓取的路徑（API 端點與內部資源）
+Disallow: /api/
+Disallow: /data/
+Disallow: /uploads/
+Disallow: /output/
+
+# Sitemap 位置
+Sitemap: https://convertx-cn.bioailab.qzz.io/sitemap.xml
\ No newline at end of file
diff --git a/public/sitemap.xml b/public/sitemap.xml
new file mode 100644
index 0000000..7ca3fc9
--- /dev/null
+++ b/public/sitemap.xml
@@ -0,0 +1,31 @@
+
+
+
+
+
+ https://convertx-cn.bioailab.qzz.io/
+ 2026-01-25
+ weekly
+ 1.0
+
+
+
+
+
+
+ https://convertx-cn.bioailab.qzz.io/login
+ 2026-01-25
+ monthly
+ 0.8
+
+
+
+
+ https://convertx-cn.bioailab.qzz.io/register
+ 2026-01-25
+ monthly
+ 0.7
+
+
+
diff --git a/src/components/base.tsx b/src/components/base.tsx
index 60a8a57..a536b00 100644
--- a/src/components/base.tsx
+++ b/src/components/base.tsx
@@ -3,7 +3,7 @@ import { type SupportedLocale, defaultLocale, getTranslations } from "../i18n/in
export const BaseHtml = ({
children,
- title = "ConvertX-CN",
+ title = "ConvertX-CN - 免費線上檔案轉換工具 | 支援 PDF、Word、圖片等格式轉換",
webroot = "",
locale = defaultLocale,
}: {
@@ -16,13 +16,46 @@ export const BaseHtml = ({
+
+ {/* SEO 核心設定 - 允許搜尋引擎索引 */}
+
+
+
+
+
+ {/* Canonical URL */}
+
+
+ {/* 多語言替代連結 */}
+
+
+
+ {/* 應用程式資訊 */}
-
+
+ {/* SEO 描述與關鍵字 */}
+
+
+
+
+ {/* Open Graph / 社交媒體分享 */}
+
+
+
+
+
+
+
+ {/* Twitter Card */}
+
+
+
+
{title}
diff --git a/src/i18n/index.ts b/src/i18n/index.ts
index ed0642d..52f15d3 100644
--- a/src/i18n/index.ts
+++ b/src/i18n/index.ts
@@ -228,7 +228,7 @@ export const supportedLocales: LocaleConfig[] = [
];
// Default to zh-TW, fallback to en
-export const defaultLocale: SupportedLocale = "zh-TW";
+export const defaultLocale: SupportedLocale = "zh-CN";
export const fallbackLocale: SupportedLocale = "en";
// Type definitions for translation keys