diff --git a/src/components/ExternalAIPanel.vue b/src/components/ExternalAIPanel.vue
new file mode 100644
index 0000000..316af26
--- /dev/null
+++ b/src/components/ExternalAIPanel.vue
@@ -0,0 +1,135 @@
+<template>
+  <div class="external-panel">
+    <div class="content-area">
+      <div class="field-label">提示词</div>
+      <n-input
+        v-model:value="promptText"
+        type="textarea"
+        :autosize="{ minRows: 3, maxRows: 8 }"
+        placeholder="粘贴你发给外部 AI 的提示词..."
+      />
+      <div class="field-label" style="margin-top: 12px">AI 代码</div>
+      <n-input
+        v-model:value="rawCode"
+        type="textarea"
+        :autosize="{ minRows: 6, maxRows: 16 }"
+        placeholder="粘贴外部 AI 返回的完整 HTML 代码..."
+      />
+      <div v-if="splitResult" class="split-result">
+        <n-tag size="small" type="success">HTML · {{ splitResult.html.length }} 字符</n-tag>
+        <n-tag size="small" type="info">CSS · {{ splitResult.css.length }} 字符</n-tag>
+        <n-tag size="small" type="warning">JS · {{ splitResult.js.length }} 字符</n-tag>
+      </div>
+    </div>
+    <div class="action-bar">
+      <n-button :disabled="!rawCode.trim()" @click="applyPreview">应用预览</n-button>
+      <n-button type="primary" :disabled="!splitResult" :loading="submitting" @click="submit">
+        提交
+      </n-button>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { ref } from "vue"
+import { useMessage } from "naive-ui"
+import { html, css, js } from "../store/editors"
+import { Submission } from "../api"
+
+const props = defineProps<{ taskId: number }>()
+const message = useMessage()
+
+const promptText = ref("")
+const rawCode = ref("")
+const splitResult = ref<{ html: string; css: string; js: string } | null>(null)
+const submitting = ref(false)
+
+function splitHtml(raw: string): { html: string; css: string; js: string } {
+  let result = raw
+  const cssBlocks: string[] = []
+  const jsBlocks: string[] = []
+
+  result = result.replace(/<style[^>]*>([\s\S]*?)<\/style>/gi, (_, content) => {
+    cssBlocks.push(content.trim())
+    return ""
+  })
+  result = result.replace(
+    /<script(?![^>]*\bsrc\b)[^>]*>([\s\S]*?)<\/script>/gi,
+    (_, content) => {
+      jsBlocks.push(content.trim())
+      return ""
+    },
+  )
+
+  return {
+    html: result.trim(),
+    css: cssBlocks.join("\n\n"),
+    js: jsBlocks.join("\n\n"),
+  }
+}
+
+function applyPreview() {
+  const result = splitHtml(rawCode.value)
+  splitResult.value = result
+  html.value = result.html
+  css.value = result.css
+  js.value = result.js
+}
+
+async function submit() {
+  if (!splitResult.value) return
+  submitting.value = true
+  try {
+    await Submission.create(props.taskId, {
+      html: splitResult.value.html,
+      css: splitResult.value.css,
+      js: splitResult.value.js,
+    })
+    message.success("提交成功")
+    promptText.value = ""
+    rawCode.value = ""
+    splitResult.value = null
+  } catch {
+    // 静默失败，保留表单内容以便重试
+  } finally {
+    submitting.value = false
+  }
+}
+</script>
+
+<style scoped>
+.external-panel {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  overflow: hidden;
+}
+
+.content-area {
+  flex: 1;
+  min-height: 0;
+  overflow-y: auto;
+  padding: 12px;
+}
+
+.field-label {
+  font-size: 12px;
+  font-weight: bold;
+  color: #666;
+  margin-bottom: 6px;
+}
+
+.split-result {
+  display: flex;
+  gap: 8px;
+  margin-top: 12px;
+  flex-wrap: wrap;
+}
+
+.action-bar {
+  padding: 12px;
+  border-top: 1px solid #e0e0e0;
+  display: flex;
+  justify-content: space-between;
+}
+</style>