diff --git a/components/aigc/course-generate/CGTaskCard.vue b/components/aigc/course-generate/CGTaskCard.vue
index aba9a24..b553c20 100644
--- a/components/aigc/course-generate/CGTaskCard.vue
+++ b/components/aigc/course-generate/CGTaskCard.vue
@@ -37,9 +37,9 @@ defineShortcuts({
     },
   },
   'meta_s': {
-    handler: () => {
+    handler: async () => {
       if (isDropdownOpen.value && isDownloadable.value) {
-        startDownload(props.course.subtitle_url, `眩生花微课_${ props.course.title }_${ props.course.task_id }.srt`)
+        await startDownload(await fetchCourseSubtitleUrl(props.course), `眩生花微课_${ props.course.title }_${ props.course.task_id }.srt`)
       }
     },
   },
@@ -220,7 +220,7 @@ const copyTaskId = (extraMessage?: string) => {
                 disabled: !isDownloadable,
                 click: () => isPreviewModalOpen = true,
               }, {
-                label: '查看字幕',
+                label: '编辑字幕',
                 icon: 'i-solar-subtitles-linear',
                 shortcuts: [metaSymbol, 'D'],
                 disabled: !isDownloadable,
@@ -233,8 +233,8 @@ const copyTaskId = (extraMessage?: string) => {
                 icon: 'i-tabler-file-download',
                 shortcuts: [metaSymbol, 'S'],
                 disabled: !isDownloadable,
-                click: () => {
-                  startDownload(course.subtitle_url, `眩生花微课_${ props.course.title }_${ props.course.task_id }.srt`)
+                click: async () => {
+                  await startDownload(await fetchCourseSubtitleUrl(course), `眩生花微课_${ props.course.title }_${ props.course.task_id }.srt`)
                 }
               }], [{
                 label: '删除记录',
diff --git a/components/aigc/course-generate/SRTEditor.vue b/components/aigc/course-generate/SRTEditor.vue
index 8705c80..cfe74b3 100644
--- a/components/aigc/course-generate/SRTEditor.vue
+++ b/components/aigc/course-generate/SRTEditor.vue
@@ -1,5 +1,6 @@
 <script setup lang="ts">
 import type { PropType } from 'vue'
+import { encode } from '@monosky/base64'
 
 interface Subtitle {
   start: string;
@@ -17,18 +18,22 @@ const props = defineProps({
 
 const dayjs = useDayjs()
 const toast = useToast()
+const loginState = useLoginState()
 
 const isDrawerActive = ref(false)
 const isLoading = ref(true)
+const isSaving = ref(false)
 const rawSrt = ref<string | null>(null)
 const subtitles = ref<Subtitle[]>([])
+const modified = ref(false)
 
 const videoElement = ref<HTMLVideoElement | null>(null)
 
 const loadSrt = async () => {
   isLoading.value = true
   try {
-    const response = await fetch(props.course.subtitle_url)
+    // const response = await fetch(props.course.subtitle_url)
+    const response = await fetch(await fetchCourseSubtitleUrl(props.course))
     const text = await response.text()
     rawSrt.value = text
     parseSrt(text)
@@ -129,6 +134,30 @@ const onSubtitleInputClick = (subtitle: Subtitle) => {
   videoElement.value.pause()
 }
 
+const saveNewSubtitle = () => {
+  isSaving.value = true
+  const encodedSubtitle = encode(generateSrt())
+  useFetchWrapped<
+    req.gen.CourseSubtitleCreate & AuthedRequest,
+    BaseResponse<resp.gen.CourseSubtitleCreate>
+  >('App.Digital_VideoSubtitle.CreateFile', {
+    token: loginState.token!,
+    user_id: loginState.user.id,
+    sub_type: 1,
+    sub_content: encodedSubtitle,
+    task_id: props.course?.task_id,
+  }).then(_ => {
+    modified.value = false
+    toast.add({
+      color: 'green',
+      title: '字幕已保存',
+      description: '修改后的字幕文件已保存',
+    })
+  }).finally(() => {
+    isSaving.value = false
+  })
+}
+
 onMounted(() => {
   if (rawSrt.value) {
     parseSrt(rawSrt.value)
@@ -240,6 +269,7 @@ defineExpose({
                   :autofocus="false"
                   :color="subtitle.active ? 'primary' : undefined"
                   @click="onSubtitleInputClick(subtitle)"
+                  @input="() => { if(!modified) modified = true }"
                 >
                   <template #trailing>
                     <Icon v-if="subtitle.active" name="tabler:keyframe-align-vertical-filled"/>
@@ -252,11 +282,12 @@ defineExpose({
 
         <template #footer>
           <!-- TODO: 24/07/02 Modified subtitles upload -->
-          <UButton @click="() => {
-            console.log(generateSrt())
-          }">
-            Generate
-          </UButton>
+          <div class="flex justify-end items-center gap-2">
+            <span v-if="modified" class="text-sm text-yellow-500 font-medium">已更改但未保存</span>
+            <UButton :disabled="!modified" :loading="isSaving" @click="saveNewSubtitle">
+              保存{{ isSaving ? '中' : '' }}
+            </UButton>
+          </div>
         </template>
       </UCard>
     </USlideover>
diff --git a/composables/fetchCourseSubtitleUrl.ts b/composables/fetchCourseSubtitleUrl.ts
new file mode 100644
index 0000000..185757e
--- /dev/null
+++ b/composables/fetchCourseSubtitleUrl.ts
@@ -0,0 +1,24 @@
+export const fetchCourseSubtitleUrl = async (course: resp.gen.CourseGenItem) => {
+  const loginState = useLoginState()
+
+  const subtitleRecord = await useFetchWrapped<
+    {
+      page?: number
+      perpage?: number
+      task_id: string
+    } & AuthedRequest,
+    BaseResponse<PagedData<resp.gen.CourseSubtitleCreate>>
+  >('App.Digital_VideoSubtitle.GetList', {
+    token: loginState.token!,
+    user_id: loginState.user.id,
+    task_id: course.task_id,
+    page: 1,
+    perpage: 1,
+  })
+
+  if (subtitleRecord.data.items.length !== 1) {
+    return course.subtitle_url
+  }
+
+  return subtitleRecord.data.items[0].url
+}
\ No newline at end of file
diff --git a/nuxt.config.ts b/nuxt.config.ts
index dafa407..9bbf53b 100644
--- a/nuxt.config.ts
+++ b/nuxt.config.ts
@@ -27,7 +27,7 @@ export default defineNuxtConfig({
     icons: ['tabler', 'solar', 'line-md', 'svg-spinners'],
   },
   colorMode: {
-    preference: 'dark',
+    preference: 'light',
   },
   dayjs: {
     locales: ['zh', 'en'],
diff --git a/package.json b/package.json
index 5277c92..604a2a6 100644
--- a/package.json
+++ b/package.json
@@ -14,6 +14,7 @@
     "@iconify-json/solar": "^1.1.9",
     "@iconify-json/svg-spinners": "^1.1.2",
     "@iconify-json/tabler": "^1.1.105",
+    "@monosky/base64": "^0.0.3",
     "@nuxt/image": "^1.7.0",
     "@nuxt/ui": "^2.14.1",
     "@uniiem/object-trim": "^0.2.0",
diff --git a/typings/types.d.ts b/typings/types.d.ts
index 73086ce..05503d5 100644
--- a/typings/types.d.ts
+++ b/typings/types.d.ts
@@ -85,6 +85,18 @@ namespace req {
       to_user_id: number
       task_id: string
     }
+
+    /**
+     * @param sub_type    0为绿幕生成，1为PPT生成
+     * @param sub_content BASE64后的ass字幕字符串
+     * @param sub_ver optional 字幕版本
+     */
+    interface CourseSubtitleCreate {
+      sub_type: 0 | 1
+      task_id: string
+      sub_content: string
+      sub_ver?: number
+    }
   }
 
   interface AssistantTemplateList {
@@ -152,6 +164,15 @@ namespace resp {
     interface CourseGenDelete {
       code: 0 | 1
     }
+
+    /**
+     * @param video_sub_id  字幕记录 ID
+     * @param url           已上传的ass文件URL(文件存放于OSS)
+     */
+    interface CourseSubtitleCreate {
+      video_sub_id: number
+      url: string
+    }
   }
 }
 
diff --git a/yarn.lock b/yarn.lock
index 8281091..59301c8 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1541,6 +1541,11 @@
     semver "^7.3.5"
     tar "^6.1.11"
 
+"@monosky/base64@^0.0.3":
+  version "0.0.3"
+  resolved "https://registry.yarnpkg.com/@monosky/base64/-/base64-0.0.3.tgz#32f512911df482df9f5bce208c9eff3a13a94589"
+  integrity sha512-PNNOPniUyjY725FvPjfRZ++Bbufjy3sy2YH7HdvpmwexuZSSdJ1UDkZx03gnWAbhM3hIhBTWbF49/9xMSbNRgg==
+
 "@netlify/functions@^2.8.0":
   version "2.8.0"
   resolved "https://registry.yarnpkg.com/@netlify/functions/-/functions-2.8.0.tgz#245f4be789891159d95391c171263ded8ee1ee3a"
@@ -7647,16 +7652,7 @@ streamx@^2.15.0, streamx@^2.18.0:
   optionalDependencies:
     bare-events "^2.2.0"
 
-"string-width-cjs@npm:string-width@^4.2.0":
-  version "4.2.3"
-  resolved "https://registry.yarnpkg.com/string-width/-/string-width-4.2.3.tgz#269c7117d27b05ad2e536830a8ec895ef9c6d010"
-  integrity sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==
-  dependencies:
-    emoji-regex "^8.0.0"
-    is-fullwidth-code-point "^3.0.0"
-    strip-ansi "^6.0.1"
-
-"string-width@^1.0.2 || 2 || 3 || 4", string-width@^4.1.0, string-width@^4.2.0, string-width@^4.2.3:
+"string-width-cjs@npm:string-width@^4.2.0", "string-width@^1.0.2 || 2 || 3 || 4", string-width@^4.1.0, string-width@^4.2.0, string-width@^4.2.3:
   version "4.2.3"
   resolved "https://registry.yarnpkg.com/string-width/-/string-width-4.2.3.tgz#269c7117d27b05ad2e536830a8ec895ef9c6d010"
   integrity sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==
@@ -7743,14 +7739,7 @@ stringify-object@^3.3.0:
     is-obj "^1.0.1"
     is-regexp "^1.0.0"
 
-"strip-ansi-cjs@npm:strip-ansi@^6.0.1":
-  version "6.0.1"
-  resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-6.0.1.tgz#9e26c63d30f53443e9489495b2105d37b67a85d9"
-  integrity sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==
-  dependencies:
-    ansi-regex "^5.0.1"
-
-strip-ansi@^6.0.0, strip-ansi@^6.0.1:
+"strip-ansi-cjs@npm:strip-ansi@^6.0.1", strip-ansi@^6.0.0, strip-ansi@^6.0.1:
   version "6.0.1"
   resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-6.0.1.tgz#9e26c63d30f53443e9489495b2105d37b67a85d9"
   integrity sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==
@@ -8838,16 +8827,7 @@ workbox-window@7.1.0, workbox-window@^7.1.0:
     "@types/trusted-types" "^2.0.2"
     workbox-core "7.1.0"
 
-"wrap-ansi-cjs@npm:wrap-ansi@^7.0.0":
-  version "7.0.0"
-  resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-7.0.0.tgz#67e145cff510a6a6984bdf1152911d69d2eb9e43"
-  integrity sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==
-  dependencies:
-    ansi-styles "^4.0.0"
-    string-width "^4.1.0"
-    strip-ansi "^6.0.0"
-
-wrap-ansi@^7.0.0:
+"wrap-ansi-cjs@npm:wrap-ansi@^7.0.0", wrap-ansi@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-7.0.0.tgz#67e145cff510a6a6984bdf1152911d69d2eb9e43"
   integrity sha512-YVGIj2kamLSTxw6NsZjoBxfSwsn0ycdesmc4p+Q21c5zPuZ1pl+NfxVdxPtdHvmNVOQ6XSYG4AUtyt/Fi7D16Q==