diff --git a/src/components/AiChat.vue b/src/components/AiChat.vue
index 1954d4c..2276277 100644
--- a/src/components/AiChat.vue
+++ b/src/components/AiChat.vue
@@ -196,6 +196,7 @@
                 v-if="msg.content || (isLastAi(msg) && store.state.currentText)"
                 class="ai-msg-bubble ai-msg-bubble--ai ai-md"
                 :class="{ 'ai-msg-bubble--error': msg.isError }"
+                :key="'md-' + msg.id + '-' + (isLastAi(msg) ? _mdRenderKey : 0)"
               >
                 <div v-html="renderContent(msg)"></div>
                 <span v-if="isLastAi(msg) && isViewingGenerating" class="ai-cursor"></span>
@@ -803,6 +804,14 @@ onMounted(async () => {
   console.debug(`[启动] AiChat IPC 完成: ${(performance.now() - t0).toFixed(0)}ms`)
 })
 
+// CR-260615-06: mdReady 就绪后主动触发首屏 Markdown 重渲染
+// （marked 加载慢 + 无新 delta 时末段停留纯文本，不触发模板重算）
+const _mdRenderKey = ref(0)
+function forceUpdate() { _mdRenderKey.value++ }
+watch(mdReady, (ready) => {
+  if (ready) nextTick(() => { forceUpdate() })
+})
+
 // ── 置顶功能 ──
 const alwaysOnTop = ref(false)
 async function toggleAlwaysOnTop() {
@@ -1208,78 +1217,6 @@ async function toggleAlwaysOnTop() {
   50% { opacity: 0; }
 }
 
-/* ═══ Markdown 渲染 ═══ */
-.ai-md :deep(p) { margin: 0 0 6px; }
-.ai-md :deep(p:last-child) { margin-bottom: 0; }
-.ai-md :deep(ul), .ai-md :deep(ol) { margin: 4px 0; padding-left: 20px; }
-.ai-md :deep(li) { margin: 2px 0; line-height: 1.5; }
-.ai-md :deep(code) {
-  font-family: var(--df-font-mono);
-  font-size: 12px;
-  padding: 1px 5px;
-  background: rgba(255,255,255,0.06);
-  border-radius: var(--df-radius-sm);
-  color: var(--df-accent);
-}
-.ai-md :deep(pre) {
-  margin: 8px 0;
-  padding: 10px 12px;
-  background: var(--df-bg);
-  border: 0.5px solid var(--df-border);
-  border-radius: var(--df-radius);
-  overflow-x: auto;
-}
-.ai-md :deep(pre code) {
-  padding: 0;
-  background: transparent;
-  border-radius: 0;
-  color: var(--df-text-secondary);
-  font-size: 12px;
-  line-height: 1.5;
-}
-.ai-md :deep(blockquote) {
-  margin: 6px 0;
-  padding: 4px 12px;
-  border-left: 2px solid var(--df-accent);
-  color: var(--df-text-secondary);
-}
-.ai-md :deep(h1), .ai-md :deep(h2), .ai-md :deep(h3) {
-  font-weight: 500;
-  color: var(--df-text);
-  margin: 8px 0 4px;
-}
-.ai-md :deep(h1) { font-size: 16px; }
-.ai-md :deep(h2) { font-size: 14px; }
-.ai-md :deep(h3) { font-size: 13px; }
-.ai-md :deep(a) {
-  color: var(--df-accent);
-  text-decoration: none;
-}
-.ai-md :deep(a:hover) { text-decoration: underline; }
-.ai-md :deep(strong) { font-weight: 500; color: var(--df-text); }
-.ai-md :deep(hr) {
-  border: none;
-  border-top: 0.5px solid var(--df-border);
-  margin: 8px 0;
-}
-.ai-md :deep(table) {
-  width: 100%;
-  border-collapse: collapse;
-  margin: 6px 0;
-  font-size: 12px;
-  overflow-x: auto;
-  display: block;
-}
-.ai-md :deep(th), .ai-md :deep(td) {
-  padding: 4px 8px;
-  border: 0.5px solid var(--df-border);
-  text-align: left;
-}
-.ai-md :deep(th) {
-  font-weight: 500;
-  background: var(--df-bg);
-}
-
 /* ── token 用量条(克制:右对齐 / 最小字号 / dim / 分隔线,不抢正文焦点) ── */
 .ai-token-usage {
   display: flex;
diff --git a/src/main.ts b/src/main.ts
index 2a37f21..e2a1e84 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -3,6 +3,7 @@ import App from "./App.vue";
 import router from "./router";
 import i18n from "./i18n";
 import "./styles/global.css";
+import "./styles/ai-md.css";
 
 createApp(App).use(router).use(i18n).mount("#app");
 
diff --git a/src/styles/ai-md.css b/src/styles/ai-md.css
new file mode 100644
index 0000000..5ac6ca1
--- /dev/null
+++ b/src/styles/ai-md.css
@@ -0,0 +1,75 @@
+/* ═══ Markdown 渲染（全局，从 AiChat.vue <style scoped> 抽出） ═══ */
+/* CR-260615-09: 原 5 文件重复 ~350 行 → 仅 AiChat.vue 有实际内容，
+   其余 4 文件(ProjectDetail/Ideas/Knowledge/TaskDetail)零 .ai-md 引用。
+   提为全局 CSS 消除唯一重复源。 */
+
+.ai-md p { margin: 0 0 6px; }
+.ai-md p:last-child { margin-bottom: 0; }
+.ai-md ul, .ai-md ol { margin: 4px 0; padding-left: 20px; }
+.ai-md li { margin: 2px 0; line-height: 1.5; }
+.ai-md code {
+  font-family: var(--df-font-mono);
+  font-size: 12px;
+  padding: 1px 5px;
+  background: rgba(255,255,255,0.06);
+  border-radius: var(--df-radius-sm);
+  color: var(--df-accent);
+}
+.ai-md pre {
+  margin: 8px 0;
+  padding: 10px 12px;
+  background: var(--df-bg);
+  border: 0.5px solid var(--df-border);
+  border-radius: var(--df-radius);
+  overflow-x: auto;
+}
+.ai-md pre code {
+  padding: 0;
+  background: transparent;
+  border-radius: 0;
+  color: var(--df-text-secondary);
+  font-size: 12px;
+  line-height: 1.5;
+}
+.ai-md blockquote {
+  margin: 6px 0;
+  padding: 4px 12px;
+  border-left: 2px solid var(--df-accent);
+  color: var(--df-text-secondary);
+}
+.ai-md h1, .ai-md h2, .ai-md h3 {
+  font-weight: 500;
+  color: var(--df-text);
+  margin: 8px 0 4px;
+}
+.ai-md h1 { font-size: 16px; }
+.ai-md h2 { font-size: 14px; }
+.ai-md h3 { font-size: 13px; }
+.a-md a {
+  color: var(--df-accent);
+  text-decoration: none;
+}
+.ai-md a:hover { text-decoration: underline; }
+.ai-md strong { font-weight: 500; color: var(--df-text); }
+.ai-md hr {
+  border: none;
+  border-top: 0.5px solid var(--df-border);
+  margin: 8px 0;
+}
+.ai-md table {
+  width: 100%;
+  border-collapse: collapse;
+  margin: 6px 0;
+  font-size: 12px;
+  overflow-x: auto;
+  display: block;
+}
+.ai-md th, .ai-md td {
+  padding: 4px 8px;
+  border: 0.5px solid var(--df-border);
+  text-align: left;
+}
+.ai-md th {
+  font-weight: 500;
+  background: var(--df-bg);
+}