diff --git a/docs/01-why-tokens-matter.zh-TW.md b/docs/01-why-tokens-matter.zh-TW.md
index 0acce69..244c568 100644
--- a/docs/01-why-tokens-matter.zh-TW.md
+++ b/docs/01-why-tokens-matter.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](01-why-tokens-matter.md) | [繁體中文（台灣）](01-why-tokens-matter.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
diff --git a/docs/02-prompt-compression.zh-TW.md b/docs/02-prompt-compression.zh-TW.md
index 21d888f..e56a2ff 100644
--- a/docs/02-prompt-compression.zh-TW.md
+++ b/docs/02-prompt-compression.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](02-prompt-compression.md) | [繁體中文（台灣）](02-prompt-compression.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
diff --git a/docs/03-language-comparison.zh-TW.md b/docs/03-language-comparison.zh-TW.md
index 259bfd5..83971d0 100644
--- a/docs/03-language-comparison.zh-TW.md
+++ b/docs/03-language-comparison.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](03-language-comparison.md) | [繁體中文（台灣）](03-language-comparison.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
diff --git a/docs/04-context-management.zh-TW.md b/docs/04-context-management.zh-TW.md
index 54f2780..469694c 100644
--- a/docs/04-context-management.zh-TW.md
+++ b/docs/04-context-management.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](04-context-management.md) | [繁體中文（台灣）](04-context-management.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
diff --git a/docs/05-output-control.zh-TW.md b/docs/05-output-control.zh-TW.md
index ad6d374..cfbd946 100644
--- a/docs/05-output-control.zh-TW.md
+++ b/docs/05-output-control.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](05-output-control.md) | [繁體中文（台灣）](05-output-control.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 > **為什麼這章對成本最重要：** 在 Anthropic／Copilot UBB 的定價邏輯下，輸出 token 的單價約是輸入的 **5 倍**。即使回應長度通常小於總輸入，這個價差仍讓輸出控制成為全指南中 ROI 最高的手段之一。只要在 `copilot-instructions.md` 放上一句 `Code only, no explanation.`，許多程式任務的輸出成本就能永久減少 40–70%。
 
diff --git a/docs/06-workflow-optimization.zh-TW.md b/docs/06-workflow-optimization.zh-TW.md
index 392b857..f01ba04 100644
--- a/docs/06-workflow-optimization.zh-TW.md
+++ b/docs/06-workflow-optimization.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](06-workflow-optimization.md) | [繁體中文（台灣）](06-workflow-optimization.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
diff --git a/docs/07-agents-md-problem.zh-TW.md b/docs/07-agents-md-problem.zh-TW.md
index 3716a14..921ee5c 100644
--- a/docs/07-agents-md-problem.zh-TW.md
+++ b/docs/07-agents-md-problem.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](07-agents-md-problem.md) | [繁體中文（台灣）](07-agents-md-problem.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
diff --git a/docs/08-mcp-tool-costs.zh-TW.md b/docs/08-mcp-tool-costs.zh-TW.md
index a1afdc4..eb46273 100644
--- a/docs/08-mcp-tool-costs.zh-TW.md
+++ b/docs/08-mcp-tool-costs.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](08-mcp-tool-costs.md) | [繁體中文（台灣）](08-mcp-tool-costs.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
diff --git a/docs/09-comparisons-data.zh-TW.md b/docs/09-comparisons-data.zh-TW.md
index f75cda4..b7c7035 100644
--- a/docs/09-comparisons-data.zh-TW.md
+++ b/docs/09-comparisons-data.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](09-comparisons-data.md) | [繁體中文（台灣）](09-comparisons-data.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
diff --git a/docs/10-practical-setup.zh-TW.md b/docs/10-practical-setup.zh-TW.md
index cf89398..641abfa 100644
--- a/docs/10-practical-setup.zh-TW.md
+++ b/docs/10-practical-setup.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](10-practical-setup.md) | [繁體中文（台灣）](10-practical-setup.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
diff --git a/docs/11-models-and-pricing.zh-TW.md b/docs/11-models-and-pricing.zh-TW.md
index 352c794..eae7c54 100644
--- a/docs/11-models-and-pricing.zh-TW.md
+++ b/docs/11-models-and-pricing.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](11-models-and-pricing.md) | [繁體中文（台灣）](11-models-and-pricing.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---
 
@@ -127,7 +127,7 @@ GitHub 目前沒有公開各 Copilot 模型的「輸入 token 單價 vs 輸出 t
 - [Practical Setup](10-practical-setup.zh-TW.md)
 - [Workflow Optimization](06-workflow-optimization.zh-TW.md)
 - [Enterprise Governance](12-enterprise-governance.zh-TW.md)
-- [Guide Home](index.zh-TW.md)
+- [Guide Home](index.md)
 
 ---
 
diff --git a/docs/12-enterprise-governance.zh-TW.md b/docs/12-enterprise-governance.zh-TW.md
index 1e27fed..474839c 100644
--- a/docs/12-enterprise-governance.zh-TW.md
+++ b/docs/12-enterprise-governance.zh-TW.md
@@ -2,7 +2,7 @@
 
 [English](12-enterprise-governance.md) | [繁體中文（台灣）](12-enterprise-governance.zh-TW.md)
 
-[← 返回指南](index.zh-TW.md)
+[← 返回指南](index.md)
 
 ---