From 8ac9f591a0558b52fcc1a29439ceb69243854f12 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=9D=8E=E7=90=A6?= <liqiworkers@gmail.com>
Date: Tue, 14 Jul 2026 09:37:13 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BC=98=E5=8C=96=E9=A1=B5=E9=9D=A2=E3=80=81?=
 =?UTF-8?q?=E4=BF=AE=E5=A4=8DBUG?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 client/src/components/admin/AdminLayout.vue   |   1 +
 client/src/components/ppt/PptSlideCanvas.vue  |  15 +-
 client/src/components/ppt/PptSlideViewer.vue  |  37 +-
 client/src/composables/usePptTemplate.ts      | 130 ++++++
 client/src/config/pptTemplateDefaults.ts      |  72 ++++
 client/src/pages/BlogPptPreview.vue           |  55 ++-
 client/src/pages/admin/PptTemplateForm.vue    | 395 ++++++++++++++++++
 client/src/pages/admin/PptTemplates.vue       | 202 +++++++++
 client/src/router.ts                          |   6 +-
 client/src/services/api.ts                    |  63 +++
 client/src/styles/pptPreview.css              | 136 +++++-
 client/src/types/pptTemplate.ts               |  69 +++
 client/src/utils/applyPptTemplate.ts          |  52 +++
 server/handlers/ppt_template.go               | 225 ++++++++++
 server/main.go                                |  11 +
 server/models/ppt_template.go                 |  58 +++
 server/repositories/migration.go              |  55 +++
 .../repositories/ppt_template_repository.go   | 170 ++++++++
 18 files changed, 1699 insertions(+), 53 deletions(-)
 create mode 100644 client/src/composables/usePptTemplate.ts
 create mode 100644 client/src/config/pptTemplateDefaults.ts
 create mode 100644 client/src/pages/admin/PptTemplateForm.vue
 create mode 100644 client/src/pages/admin/PptTemplates.vue
 create mode 100644 client/src/types/pptTemplate.ts
 create mode 100644 client/src/utils/applyPptTemplate.ts
 create mode 100644 server/handlers/ppt_template.go
 create mode 100644 server/models/ppt_template.go
 create mode 100644 server/repositories/ppt_template_repository.go

diff --git a/client/src/components/admin/AdminLayout.vue b/client/src/components/admin/AdminLayout.vue
index 18f8941..b4fc788 100644
--- a/client/src/components/admin/AdminLayout.vue
+++ b/client/src/components/admin/AdminLayout.vue
@@ -250,6 +250,7 @@ const menuItems = ref<MenuItemWithState[]>([
     isOpen: false,
     children: [
       { title: '全局配置', path: '/admin/settings', icon: '🛠️' },
+      { title: 'PPT 模板', path: '/admin/ppt-templates', icon: '📽️' },
       { title: '操作日志', path: '/admin/logs', icon: '📋' },
       { title: '访问日志', path: '/admin/access-logs', icon: '🌐' }
     ]
diff --git a/client/src/components/ppt/PptSlideCanvas.vue b/client/src/components/ppt/PptSlideCanvas.vue
index 47acca0..257415a 100644
--- a/client/src/components/ppt/PptSlideCanvas.vue
+++ b/client/src/components/ppt/PptSlideCanvas.vue
@@ -14,18 +14,20 @@ import '../../styles/pptPreview.css'
 
 interface Props {
   slide: PptSlide
-  theme?: 'light' | 'dark'
   compact?: boolean
   /** 分步揭示：0=仅标题居中；Infinity=显示全部（缩略图） */
   visibleStep?: number
   slideDirection?: SlideDirection
+  templateVars?: Record<string, string>
+  revealTransition?: string
 }
 
 const props = withDefaults(defineProps<Props>(), {
-  theme: 'dark',
   compact: false,
   visibleStep: Number.POSITIVE_INFINITY,
   slideDirection: 'none',
+  templateVars: () => ({}),
+  revealTransition: 'ppt-reveal',
 })
 
 type ImageLoadState = 'initial' | 'noReferrer' | 'failed'
@@ -33,7 +35,6 @@ type ImageLoadState = 'initial' | 'noReferrer' | 'failed'
 const imageLoadStates = ref<Map<string, ImageLoadState>>(new Map())
 const videoRefs = ref<Map<number, HTMLVideoElement>>(new Map())
 
-const themeClass = computed(() => `ppt-theme-${props.theme}`)
 const showFull = computed(() => !Number.isFinite(props.visibleStep))
 
 const titleMetaLines = computed(() => {
@@ -127,7 +128,7 @@ const stopMediaEvent = (e: Event) => {
 </script>
 
 <template>
-  <div class="ppt-preview-root" :class="themeClass">
+  <div class="ppt-preview-root" :style="templateVars">
     <!-- 封面 -->
     <div
       v-if="slide.kind === 'title'"
@@ -135,7 +136,7 @@ const stopMediaEvent = (e: Event) => {
       :class="{ 'ppt-slide-canvas--focus-title': isTitleFocus }"
     >
       <h1 class="ppt-slide-title-main">{{ slide.title }}</h1>
-      <Transition name="ppt-reveal">
+      <Transition :name="revealTransition">
         <div v-if="showTitleMeta && titleMetaLines.length" class="ppt-slide-title-meta">
           <div v-for="(line, idx) in titleMetaLines" :key="idx">{{ line }}</div>
         </div>
@@ -159,14 +160,14 @@ const stopMediaEvent = (e: Event) => {
           {{ sectionTitleParts.parent }}
         </p>
         <h2 class="ppt-slide-section-title">{{ sectionTitleParts.title }}</h2>
-        <Transition name="ppt-reveal">
+        <Transition :name="revealTransition">
           <div v-if="!isTitleFocus" class="ppt-slide-section-accent"></div>
         </Transition>
       </header>
 
       <div v-if="!isTitleFocus" class="ppt-slide-body">
         <template v-for="(unit, idx) in visibleUnits" :key="idx">
-          <Transition name="ppt-reveal">
+          <Transition :name="revealTransition">
             <div
               v-if="isUnitVisible(idx)"
               class="ppt-block-reveal"
diff --git a/client/src/components/ppt/PptSlideViewer.vue b/client/src/components/ppt/PptSlideViewer.vue
index f0dfd31..4453efc 100644
--- a/client/src/components/ppt/PptSlideViewer.vue
+++ b/client/src/components/ppt/PptSlideViewer.vue
@@ -12,21 +12,27 @@ import '../../styles/pptPreview.css'
 
 interface Props {
   slides: PptSlide[]
-  theme?: 'light' | 'dark'
   currentIndex: number
   currentStep: number
   slideDirection?: SlideDirection
   isFullscreen?: boolean
   showThumbnails?: boolean
   toolbarVisible?: boolean
+  templateVars?: Record<string, string>
+  slideTransitionForward?: string
+  slideTransitionBackward?: string
+  revealTransition?: string
 }
 
 const props = withDefaults(defineProps<Props>(), {
-  theme: 'dark',
   slideDirection: 'none',
   isFullscreen: false,
   showThumbnails: true,
   toolbarVisible: true,
+  templateVars: () => ({}),
+  slideTransitionForward: 'ppt-slide',
+  slideTransitionBackward: 'ppt-slide-back',
+  revealTransition: 'ppt-reveal',
 })
 
 const emit = defineEmits<{
@@ -60,6 +66,12 @@ const isEdgeToEdge = computed(() => props.isFullscreen && !props.toolbarVisible)
 
 const FULL_STEP = Number.POSITIVE_INFINITY
 
+const slideTransitionName = computed(() =>
+  props.slideDirection === 'backward'
+    ? props.slideTransitionBackward
+    : props.slideTransitionForward
+)
+
 const handleSlideClick = (e: MouseEvent) => {
   if (e.button !== 0) return
   if (isMediaInteractionTarget(e.target)) return
@@ -74,11 +86,9 @@ const handleSlideContextMenu = (e: MouseEvent) => {
 
 <template>
   <div
-    class="ppt-preview-root ppt-viewer flex flex-col flex-1 min-h-0 w-full bg-[#0a0a0a]"
-    :class="[
-      `ppt-theme-${theme}`,
-      { 'ppt-viewer--fullscreen': isEdgeToEdge },
-    ]"
+    class="ppt-preview-root ppt-viewer flex flex-col flex-1 min-h-0 w-full"
+    :class="{ 'ppt-viewer--fullscreen': isEdgeToEdge }"
+    :style="templateVars"
   >
     <div class="ppt-stage">
       <button
@@ -96,14 +106,15 @@ const handleSlideContextMenu = (e: MouseEvent) => {
         @click="handleSlideClick"
         @contextmenu="handleSlideContextMenu"
       >
-        <Transition :name="slideDirection === 'backward' ? 'ppt-slide-back' : 'ppt-slide'">
+        <Transition :name="slideTransitionName">
           <PptSlideCanvas
             v-if="currentSlide"
             :key="currentIndex"
             :slide="currentSlide"
-            :theme="theme"
             :visible-step="currentStep"
             :slide-direction="slideDirection"
+            :template-vars="templateVars"
+            :reveal-transition="revealTransition"
           />
         </Transition>
       </div>
@@ -142,7 +153,13 @@ const handleSlideContextMenu = (e: MouseEvent) => {
             @click="emit('goToSlide', idx)"
           >
             <div class="ppt-thumbnail-inner">
-              <PptSlideCanvas :slide="slide" :theme="theme" compact :visible-step="FULL_STEP" />
+              <PptSlideCanvas
+                :slide="slide"
+                compact
+                :visible-step="FULL_STEP"
+                :template-vars="templateVars"
+                :reveal-transition="revealTransition"
+              />
             </div>
           </button>
         </div>
diff --git a/client/src/composables/usePptTemplate.ts b/client/src/composables/usePptTemplate.ts
new file mode 100644
index 0000000..46b14cf
--- /dev/null
+++ b/client/src/composables/usePptTemplate.ts
@@ -0,0 +1,130 @@
+import { computed, ref } from 'vue'
+import { parsePptTemplateConfig, SYSTEM_DEFAULT_PPT_CONFIG } from '../config/pptTemplateDefaults'
+import { fetchPptTemplates, type PptTemplateApiItem } from '../services/api'
+import type { PptTemplate, PptTemplateConfig } from '../types/pptTemplate'
+import { applyPptTemplate } from '../utils/applyPptTemplate'
+
+const STORAGE_KEY = 'ppt_selected_template_id'
+
+function readStoredTemplateId(): number | null {
+  try {
+    const raw = localStorage.getItem(STORAGE_KEY)
+    if (!raw) return null
+    const id = Number.parseInt(raw, 10)
+    return Number.isFinite(id) && id > 0 ? id : null
+  } catch {
+    return null
+  }
+}
+
+function writeStoredTemplateId(id: number): void {
+  try {
+    localStorage.setItem(STORAGE_KEY, String(id))
+  } catch {
+    /* ignore */
+  }
+}
+
+function normalizeTemplate(raw: PptTemplateApiItem): PptTemplate {
+  return {
+    ...raw,
+    config: parsePptTemplateConfig(raw.config),
+  }
+}
+
+function buildFallbackTemplate(): PptTemplate {
+  return {
+    id: 0,
+    name: '默认模板',
+    slug: 'default',
+    description: '',
+    config: SYSTEM_DEFAULT_PPT_CONFIG,
+    isSystem: true,
+    isDefault: true,
+    sortOrder: 0,
+    isActive: true,
+  }
+}
+
+export function usePptTemplate() {
+  const templates = ref<PptTemplate[]>([])
+  const loading = ref(false)
+  const selectedTemplateId = ref<number | null>(readStoredTemplateId())
+
+  const loadTemplates = async () => {
+    loading.value = true
+    try {
+      const list = await fetchPptTemplates()
+      templates.value = list.map(normalizeTemplate)
+      if (!templates.value.length) {
+        templates.value = [buildFallbackTemplate()]
+        return
+      }
+
+      const storedId = selectedTemplateId.value
+      const storedExists = storedId != null && templates.value.some((t) => t.id === storedId)
+      if (!storedExists) {
+        const fallback =
+          templates.value.find((t) => t.isDefault) ??
+          templates.value.find((t) => t.isSystem) ??
+          templates.value[0]
+        if (fallback) {
+          selectedTemplateId.value = fallback.id
+          writeStoredTemplateId(fallback.id)
+        }
+      }
+    } catch (err) {
+      console.error('Failed to load PPT templates:', err)
+      templates.value = [buildFallbackTemplate()]
+      selectedTemplateId.value = 0
+    } finally {
+      loading.value = false
+    }
+  }
+
+  const activeTemplate = computed((): PptTemplate => {
+    if (!templates.value.length) return buildFallbackTemplate()
+    const id = selectedTemplateId.value
+    const found = id != null ? templates.value.find((t) => t.id === id) : undefined
+    if (found) return found
+    return (
+      templates.value.find((t) => t.isDefault) ??
+      templates.value.find((t) => t.isSystem) ??
+      templates.value[0] ??
+      buildFallbackTemplate()
+    )
+  })
+
+  const applied = computed(() => applyPptTemplate(activeTemplate.value.config))
+
+  const templateVars = computed(() => applied.value.templateVars)
+  const slideTransitionForward = computed(() => applied.value.slideTransitionForward)
+  const slideTransitionBackward = computed(() => applied.value.slideTransitionBackward)
+  const revealTransition = computed(() => applied.value.revealTransition)
+  const showThumbnailsDefault = computed(
+    () => activeTemplate.value.config.ui.showThumbnailsDefault
+  )
+
+  const setTemplate = (id: number) => {
+    if (!templates.value.some((t) => t.id === id)) return
+    selectedTemplateId.value = id
+    writeStoredTemplateId(id)
+  }
+
+  const applyConfigPreview = (config: PptTemplateConfig) => applyPptTemplate(config)
+
+  return {
+    templates,
+    loading,
+    selectedTemplateId,
+    activeTemplate,
+    templateVars,
+    slideTransitionForward,
+    slideTransitionBackward,
+    revealTransition,
+    showThumbnailsDefault,
+    loadTemplates,
+    setTemplate,
+    applyConfigPreview,
+  }
+}
diff --git a/client/src/config/pptTemplateDefaults.ts b/client/src/config/pptTemplateDefaults.ts
new file mode 100644
index 0000000..982eb72
--- /dev/null
+++ b/client/src/config/pptTemplateDefaults.ts
@@ -0,0 +1,72 @@
+import type { PptTemplateConfig } from '../types/pptTemplate'
+import type { PptSectionSlide } from '../utils/articlePptSlides'
+
+/** 后台/预览用示例幻灯片 */
+export const PPT_TEMPLATE_PREVIEW_SLIDE: PptSectionSlide = {
+  kind: 'section',
+  title: '示例章节 · 演示内容',
+  continued: false,
+  blocks: [
+    { type: 'h2', text: '小节标题' },
+    { type: 'paragraph', text: '这是模板预览示例段落，修改配色与动画可即时看到效果。' },
+    { type: 'list', ordered: true, items: ['步骤一：打开应用', '步骤二：完成操作'] },
+  ],
+}
+
+export const SYSTEM_DEFAULT_PPT_CONFIG: PptTemplateConfig = {
+  colors: {
+    bg: '#141414',
+    text: '#f5f5f5',
+    muted: '#a0a0a0',
+    accent: '#c9a962',
+    codeBg: '#1e1e1e',
+    codeText: '#eeeeee',
+    border: 'rgba(255, 255, 255, 0.1)',
+  },
+  animation: {
+    revealDuration: '0.95s',
+    revealLeaveDuration: '0.65s',
+    slideDuration: '0.85s',
+    layoutDuration: '0.75s',
+    revealOffset: '10px',
+    easing: 'cubic-bezier(0.22, 1, 0.36, 1)',
+  },
+  transitions: {
+    slide: 'crossfade',
+    reveal: 'fadeUp',
+  },
+  ui: {
+    showThumbnailsDefault: true,
+    canvasBorderRadius: '0.5rem',
+  },
+}
+
+export const SYSTEM_DEFAULT_PPT_CONFIG_JSON = JSON.stringify(SYSTEM_DEFAULT_PPT_CONFIG)
+
+export function clonePptTemplateConfig(config: PptTemplateConfig): PptTemplateConfig {
+  return JSON.parse(JSON.stringify(config)) as PptTemplateConfig
+}
+
+export function createEmptyPptTemplateForm() {
+  return {
+    name: '',
+    slug: '',
+    description: '',
+    config: clonePptTemplateConfig(SYSTEM_DEFAULT_PPT_CONFIG),
+    isDefault: false,
+    sortOrder: 0,
+    isActive: true,
+  }
+}
+
+export function parsePptTemplateConfig(raw: unknown): PptTemplateConfig {
+  const base = clonePptTemplateConfig(SYSTEM_DEFAULT_PPT_CONFIG)
+  if (!raw || typeof raw !== 'object') return base
+
+  const input = raw as Partial<PptTemplateConfig>
+  if (input.colors) Object.assign(base.colors, input.colors)
+  if (input.animation) Object.assign(base.animation, input.animation)
+  if (input.transitions) Object.assign(base.transitions, input.transitions)
+  if (input.ui) Object.assign(base.ui, input.ui)
+  return base
+}
diff --git a/client/src/pages/BlogPptPreview.vue b/client/src/pages/BlogPptPreview.vue
index bf76d36..5af1767 100644
--- a/client/src/pages/BlogPptPreview.vue
+++ b/client/src/pages/BlogPptPreview.vue
@@ -7,9 +7,10 @@ import { useRoute, useRouter } from 'vue-router'
 import Icon from '../components/Icon.vue'
 import PptSlideViewer from '../components/ppt/PptSlideViewer.vue'
 import { usePptPresentation } from '../composables/usePptPresentation'
+import { usePptTemplate } from '../composables/usePptTemplate'
 import { useToast } from '../composables/useToast'
 import { fetchPost, type Post } from '../services/api'
-import { exportAsPptStructured, type ExportTheme } from '../utils/articleExport'
+import { exportAsPptStructured } from '../utils/articleExport'
 import { buildPptSlides } from '../utils/articlePptSlides'
 import { getCachedSiteTitle } from '../router'
 
@@ -21,9 +22,22 @@ const postId = route.params.id as string
 const post = ref<Post | null>(null)
 const loading = ref(true)
 const error = ref('')
-const theme = ref<ExportTheme>('dark')
 const isExporting = ref(false)
 
+const {
+  templates,
+  selectedTemplateId,
+  templateVars,
+  slideTransitionForward,
+  slideTransitionBackward,
+  revealTransition,
+  showThumbnailsDefault,
+  loadTemplates,
+  setTemplate,
+} = usePptTemplate()
+
+const showThumbnails = ref(true)
+
 const containerRef = ref<HTMLElement | null>(null)
 const toolbarVisible = ref(true)
 let hideToolbarTimer: ReturnType<typeof setTimeout> | null = null
@@ -80,10 +94,6 @@ const goBack = () => {
   router.push(`/blog/${postId}`)
 }
 
-const toggleTheme = () => {
-  theme.value = theme.value === 'dark' ? 'light' : 'dark'
-}
-
 const handleExport = async () => {
   if (!post.value || isExporting.value) return
   isExporting.value = true
@@ -113,7 +123,14 @@ const handleMouseMove = () => {
   }, 3000)
 }
 
-onMounted(() => {
+const onTemplateChange = (e: Event) => {
+  const id = Number.parseInt((e.target as HTMLSelectElement).value, 10)
+  if (Number.isFinite(id)) setTemplate(id)
+}
+
+onMounted(async () => {
+  await loadTemplates()
+  showThumbnails.value = showThumbnailsDefault.value
   void fetchDetail()
 })
 </script>
@@ -146,14 +163,16 @@ onMounted(() => {
       </div>
 
       <div class="flex items-center gap-2">
-        <button
-          type="button"
-          class="flex items-center gap-1.5 rounded-full border border-white/10 bg-white/5 px-3 py-1.5 text-xs text-white/70 hover:text-white hover:bg-white/10 transition-colors"
-          @click="toggleTheme"
-        >
-          <Icon :name="theme === 'dark' ? 'sun' : 'moon'" :size="14" />
-          <span class="hidden sm:inline">{{ theme === 'dark' ? '浅色' : '深色' }}</span>
-        </button>
+        <label v-if="templates.length" class="flex items-center gap-1.5 text-xs text-white/70">
+          <span class="hidden sm:inline">模板</span>
+          <select
+            class="rounded-full border border-white/10 bg-white/5 px-2 py-1.5 text-xs text-white/90 outline-none"
+            :value="selectedTemplateId ?? ''"
+            @change="onTemplateChange"
+          >
+            <option v-for="t in templates" :key="t.id" :value="t.id">{{ t.name }}</option>
+          </select>
+        </label>
 
         <button
           type="button"
@@ -194,12 +213,16 @@ onMounted(() => {
     <PptSlideViewer
       v-else-if="slides.length"
       :slides="slides"
-      :theme="theme"
       :current-index="currentIndex"
       :current-step="currentStep"
       :slide-direction="slideDirection"
       :is-fullscreen="isFullscreen"
+      :show-thumbnails="showThumbnails"
       :toolbar-visible="toolbarVisible"
+      :template-vars="templateVars"
+      :slide-transition-forward="slideTransitionForward"
+      :slide-transition-backward="slideTransitionBackward"
+      :reveal-transition="revealTransition"
       class="flex-1 min-h-0 relative"
       @advance="advance"
       @retreat="retreat"
diff --git a/client/src/pages/admin/PptTemplateForm.vue b/client/src/pages/admin/PptTemplateForm.vue
new file mode 100644
index 0000000..ac085c2
--- /dev/null
+++ b/client/src/pages/admin/PptTemplateForm.vue
@@ -0,0 +1,395 @@
+<template>
+  <div class="form-container">
+    <h1 class="page-title">{{ isEdit ? '编辑 PPT 模板' : '新建 PPT 模板' }}</h1>
+
+    <div class="form-layout">
+      <div class="form-card">
+        <form @submit.prevent="submitForm">
+          <section class="form-section">
+            <h3>基础信息</h3>
+            <div class="form-group">
+              <label class="form-label">名称</label>
+              <input v-model="formData.name" type="text" class="form-input" required />
+            </div>
+            <div class="form-group">
+              <label class="form-label">Slug</label>
+              <input
+                v-model="formData.slug"
+                type="text"
+                class="form-input"
+                :readonly="isSystemEdit"
+                required
+              />
+            </div>
+            <div class="form-group">
+              <label class="form-label">描述</label>
+              <textarea v-model="formData.description" class="form-input" rows="2" />
+            </div>
+            <div class="form-row">
+              <label class="checkbox-label">
+                <input v-model="formData.isDefault" type="checkbox" />
+                设为演示默认模板
+              </label>
+              <label class="checkbox-label">
+                <input v-model="formData.isActive" type="checkbox" :disabled="isSystemEdit" />
+                启用
+              </label>
+            </div>
+            <div class="form-group">
+              <label class="form-label">排序</label>
+              <input v-model.number="formData.sortOrder" type="number" class="form-input" />
+            </div>
+          </section>
+
+          <section class="form-section">
+            <h3>配色</h3>
+            <div class="color-grid">
+              <div v-for="key in colorKeys" :key="key" class="form-group">
+                <label class="form-label">{{ colorLabels[key] }}</label>
+                <input
+                  v-if="key !== 'border'"
+                  v-model="formData.config.colors[key]"
+                  type="color"
+                  class="color-input"
+                />
+                <input v-model="formData.config.colors[key]" type="text" class="form-input form-input--sm" />
+              </div>
+            </div>
+          </section>
+
+          <section class="form-section">
+            <h3>动画</h3>
+            <div class="form-grid">
+              <div class="form-group">
+                <label class="form-label">揭示时长</label>
+                <input v-model="formData.config.animation.revealDuration" class="form-input" />
+              </div>
+              <div class="form-group">
+                <label class="form-label">揭示退出</label>
+                <input v-model="formData.config.animation.revealLeaveDuration" class="form-input" />
+              </div>
+              <div class="form-group">
+                <label class="form-label">翻页时长</label>
+                <input v-model="formData.config.animation.slideDuration" class="form-input" />
+              </div>
+              <div class="form-group">
+                <label class="form-label">布局时长</label>
+                <input v-model="formData.config.animation.layoutDuration" class="form-input" />
+              </div>
+              <div class="form-group">
+                <label class="form-label">揭示位移</label>
+                <input v-model="formData.config.animation.revealOffset" class="form-input" />
+              </div>
+              <div class="form-group form-group--wide">
+                <label class="form-label">缓动曲线</label>
+                <input v-model="formData.config.animation.easing" class="form-input" />
+              </div>
+            </div>
+          </section>
+
+          <section class="form-section">
+            <h3>切换效果</h3>
+            <div class="form-grid">
+              <div class="form-group">
+                <label class="form-label">页间切换</label>
+                <select v-model="formData.config.transitions.slide" class="form-input">
+                  <option value="crossfade">交叉淡入 (crossfade)</option>
+                  <option value="fade">纯淡入 (fade)</option>
+                  <option value="push">推入 (push)</option>
+                </select>
+              </div>
+              <div class="form-group">
+                <label class="form-label">分步揭示</label>
+                <select v-model="formData.config.transitions.reveal" class="form-input">
+                  <option value="fadeUp">上滑淡入 (fadeUp)</option>
+                  <option value="fade">纯淡入 (fade)</option>
+                </select>
+              </div>
+            </div>
+          </section>
+
+          <section class="form-section">
+            <h3>UI</h3>
+            <div class="form-row">
+              <label class="checkbox-label">
+                <input v-model="formData.config.ui.showThumbnailsDefault" type="checkbox" />
+                默认显示缩略图栏
+              </label>
+            </div>
+            <div class="form-group">
+              <label class="form-label">幻灯片圆角</label>
+              <input v-model="formData.config.ui.canvasBorderRadius" class="form-input" />
+            </div>
+          </section>
+
+          <div class="form-actions">
+            <button type="button" class="btn-secondary" @click="router.back()">取消</button>
+            <button type="submit" class="btn-primary">{{ isEdit ? '保存修改' : '创建模板' }}</button>
+          </div>
+        </form>
+      </div>
+
+      <div class="preview-card">
+        <h3>实时预览</h3>
+        <div class="preview-stage">
+          <PptSlideCanvas
+            :slide="PPT_TEMPLATE_PREVIEW_SLIDE"
+            :visible-step="999"
+            :template-vars="previewApplied.templateVars"
+            :reveal-transition="previewApplied.revealTransition"
+            compact
+          />
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { computed, onMounted, ref } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+import PptSlideCanvas from '../../components/ppt/PptSlideCanvas.vue'
+import {
+  clonePptTemplateConfig,
+  createEmptyPptTemplateForm,
+  parsePptTemplateConfig,
+  PPT_TEMPLATE_PREVIEW_SLIDE,
+} from '../../config/pptTemplateDefaults'
+import { useToast } from '../../composables/useToast'
+import {
+  createPptTemplate,
+  fetchAdminPptTemplates,
+  fetchDefaultPptTemplate,
+  updatePptTemplate,
+} from '../../services/api'
+import type { PptTemplateColors } from '../../types/pptTemplate'
+import { applyPptTemplate } from '../../utils/applyPptTemplate'
+
+const router = useRouter()
+const route = useRoute()
+const toast = useToast()
+
+const isEdit = computed(() => !!route.params.id)
+const isSystemEdit = ref(false)
+
+const formData = ref(createEmptyPptTemplateForm())
+
+const colorKeys = [
+  'bg',
+  'text',
+  'muted',
+  'accent',
+  'codeBg',
+  'codeText',
+  'border',
+] as const satisfies readonly (keyof PptTemplateColors)[]
+
+const colorLabels: Record<(typeof colorKeys)[number], string> = {
+  bg: '背景',
+  text: '正文',
+  muted: '次要文字',
+  accent: '强调色',
+  codeBg: '代码背景',
+  codeText: '代码文字',
+  border: '边框',
+}
+
+const previewApplied = computed(() => applyPptTemplate(formData.value.config))
+
+const loadForCreate = async () => {
+  try {
+    const defaults = await fetchDefaultPptTemplate()
+    formData.value.config = clonePptTemplateConfig(parsePptTemplateConfig(defaults.config))
+  } catch (err) {
+    console.error(err)
+    toast.warning('未能加载系统默认模板，使用内置默认值')
+  }
+}
+
+const loadForEdit = async () => {
+  const id = Number.parseInt(route.params.id as string, 10)
+  const list = await fetchAdminPptTemplates()
+  const item = list.find((t) => t.id === id)
+  if (!item) {
+    toast.error('模板不存在')
+    router.push('/admin/ppt-templates')
+    return
+  }
+  isSystemEdit.value = item.isSystem
+  formData.value = {
+    name: item.name,
+    slug: item.slug,
+    description: item.description || '',
+    config: clonePptTemplateConfig(parsePptTemplateConfig(item.config)),
+    isDefault: item.isDefault,
+    sortOrder: item.sortOrder,
+    isActive: item.isActive,
+  }
+}
+
+const submitForm = async () => {
+  try {
+    if (isEdit.value) {
+      await updatePptTemplate(Number.parseInt(route.params.id as string, 10), formData.value)
+      toast.success('更新成功')
+    } else {
+      await createPptTemplate(formData.value)
+      toast.success('创建成功')
+    }
+    router.push('/admin/ppt-templates')
+  } catch (err: unknown) {
+    console.error(err)
+    toast.error(err instanceof Error ? err.message : '保存失败')
+  }
+}
+
+onMounted(async () => {
+  if (isEdit.value) {
+    await loadForEdit()
+  } else {
+    await loadForCreate()
+  }
+})
+</script>
+
+<style scoped>
+.form-container {
+  width: 100%;
+}
+
+.page-title {
+  font-size: 1.75rem;
+  font-weight: 700;
+  margin-bottom: 1.5rem;
+  color: #fff;
+}
+
+.form-layout {
+  display: grid;
+  grid-template-columns: 1fr 420px;
+  gap: 1.5rem;
+  align-items: start;
+}
+
+@media (max-width: 1100px) {
+  .form-layout {
+    grid-template-columns: 1fr;
+  }
+}
+
+.form-card,
+.preview-card {
+  background: rgba(255, 255, 255, 0.03);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+  border-radius: 0.5rem;
+  padding: 1.25rem;
+}
+
+.form-section {
+  margin-bottom: 1.5rem;
+}
+
+.form-section h3,
+.preview-card h3 {
+  font-size: 1rem;
+  color: #d4b383;
+  margin-bottom: 1rem;
+}
+
+.form-group {
+  margin-bottom: 0.75rem;
+}
+
+.form-group--wide {
+  grid-column: 1 / -1;
+}
+
+.form-label {
+  display: block;
+  font-size: 0.875rem;
+  color: rgba(255, 255, 255, 0.7);
+  margin-bottom: 0.35rem;
+}
+
+.form-input {
+  width: 100%;
+  padding: 0.5rem 0.75rem;
+  background: rgba(255, 255, 255, 0.05);
+  border: 1px solid rgba(255, 255, 255, 0.1);
+  border-radius: 0.375rem;
+  color: #fff;
+}
+
+.form-input--sm {
+  margin-top: 0.35rem;
+  font-size: 0.75rem;
+}
+
+.form-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 0.75rem;
+}
+
+.color-grid {
+  display: grid;
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 0.75rem;
+}
+
+.color-input {
+  width: 100%;
+  height: 2rem;
+  border: none;
+  background: transparent;
+  cursor: pointer;
+}
+
+.form-row {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 1rem;
+  margin-bottom: 0.75rem;
+}
+
+.checkbox-label {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  color: rgba(255, 255, 255, 0.85);
+  font-size: 0.875rem;
+}
+
+.form-actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: 0.75rem;
+  margin-top: 1rem;
+}
+
+.btn-primary,
+.btn-secondary {
+  padding: 0.5rem 1rem;
+  border-radius: 0.375rem;
+  border: none;
+  cursor: pointer;
+  font-weight: 600;
+}
+
+.btn-primary {
+  background: #d4b383;
+  color: #1a1a1a;
+}
+
+.btn-secondary {
+  background: rgba(255, 255, 255, 0.1);
+  color: #fff;
+}
+
+.preview-stage {
+  aspect-ratio: 16 / 9;
+  overflow: hidden;
+  border-radius: 0.375rem;
+  border: 1px solid rgba(255, 255, 255, 0.08);
+}
+</style>
diff --git a/client/src/pages/admin/PptTemplates.vue b/client/src/pages/admin/PptTemplates.vue
new file mode 100644
index 0000000..9081664
--- /dev/null
+++ b/client/src/pages/admin/PptTemplates.vue
@@ -0,0 +1,202 @@
+<template>
+  <div class="ppt-templates-container">
+    <h1 class="page-title">PPT 模板</h1>
+
+    <div class="action-bar">
+      <button class="btn-primary" @click="router.push('/admin/ppt-templates/create')">
+        <span class="btn-icon">➕</span>
+        新建模板
+      </button>
+    </div>
+
+    <div class="table-container">
+      <table class="admin-table">
+        <thead>
+          <tr>
+            <th>ID</th>
+            <th>名称</th>
+            <th>Slug</th>
+            <th>类型</th>
+            <th>默认</th>
+            <th>排序</th>
+            <th>状态</th>
+            <th>操作</th>
+          </tr>
+        </thead>
+        <tbody>
+          <tr v-for="t in templates" :key="t.id">
+            <td class="table-cell">{{ t.id }}</td>
+            <td class="table-cell">{{ t.name }}</td>
+            <td class="table-cell font-mono text-sm">{{ t.slug }}</td>
+            <td class="table-cell">
+              <span v-if="t.isSystem" class="badge-system">系统默认</span>
+              <span v-else class="text-white/50">自定义</span>
+            </td>
+            <td class="table-cell">{{ t.isDefault ? '是' : '否' }}</td>
+            <td class="table-cell">{{ t.sortOrder }}</td>
+            <td class="table-cell">
+              <span :class="t.isActive ? 'text-green-400' : 'text-red-400'">
+                {{ t.isActive ? '启用' : '禁用' }}
+              </span>
+            </td>
+            <td class="table-cell actions">
+              <button class="btn-edit" title="编辑" @click="router.push(`/admin/ppt-templates/${t.id}/edit`)">
+                ✏️
+              </button>
+              <button
+                v-if="!t.isSystem"
+                class="btn-delete"
+                title="删除"
+                @click="handleDelete(t.id)"
+              >
+                🗑️
+              </button>
+            </td>
+          </tr>
+        </tbody>
+      </table>
+
+      <div v-if="!templates.length && !loading" class="empty-state">
+        <p>暂无模板</p>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { onMounted, ref } from 'vue'
+import { useRouter } from 'vue-router'
+import { useToast } from '../../composables/useToast'
+import { deletePptTemplate, fetchAdminPptTemplates, type PptTemplateApiItem } from '../../services/api'
+import { parsePptTemplateConfig } from '../../config/pptTemplateDefaults'
+
+const router = useRouter()
+const toast = useToast()
+const templates = ref<PptTemplateApiItem[]>([])
+const loading = ref(false)
+
+const loadTemplates = async () => {
+  loading.value = true
+  try {
+    const list = await fetchAdminPptTemplates()
+    templates.value = list.map((t) => ({
+      ...t,
+      config: parsePptTemplateConfig(t.config),
+    }))
+  } catch (err) {
+    console.error(err)
+    toast.error('加载模板失败')
+  } finally {
+    loading.value = false
+  }
+}
+
+const handleDelete = async (id: number) => {
+  if (!confirm('确定删除该模板？')) return
+  try {
+    await deletePptTemplate(id)
+    toast.success('已删除')
+    await loadTemplates()
+  } catch (err: unknown) {
+    console.error(err)
+    toast.error(err instanceof Error ? err.message : '删除失败')
+  }
+}
+
+onMounted(() => {
+  void loadTemplates()
+})
+</script>
+
+<style scoped>
+.ppt-templates-container {
+  width: 100%;
+}
+
+.page-title {
+  font-size: 1.75rem;
+  font-weight: 700;
+  margin-bottom: 1.5rem;
+  color: #fff;
+}
+
+.action-bar {
+  margin-bottom: 1.5rem;
+}
+
+.btn-primary {
+  display: inline-flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.5rem 1rem;
+  background: #d4b383;
+  color: #1a1a1a;
+  border: none;
+  border-radius: 0.375rem;
+  font-weight: 600;
+  cursor: pointer;
+}
+
+.table-container {
+  background: rgba(255, 255, 255, 0.03);
+  border-radius: 0.5rem;
+  border: 1px solid rgba(255, 255, 255, 0.1);
+  overflow: hidden;
+}
+
+.admin-table {
+  width: 100%;
+  border-collapse: collapse;
+}
+
+.admin-table th,
+.admin-table td {
+  padding: 0.75rem 1rem;
+  text-align: left;
+  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
+}
+
+.admin-table th {
+  background: rgba(255, 255, 255, 0.05);
+  font-weight: 600;
+  color: #d4b383;
+}
+
+.table-cell {
+  color: rgba(255, 255, 255, 0.85);
+}
+
+.actions {
+  display: flex;
+  gap: 0.5rem;
+}
+
+.btn-edit,
+.btn-delete {
+  background: none;
+  border: none;
+  cursor: pointer;
+  font-size: 1rem;
+  opacity: 0.7;
+}
+
+.btn-edit:hover,
+.btn-delete:hover {
+  opacity: 1;
+}
+
+.badge-system {
+  display: inline-block;
+  padding: 0.15rem 0.5rem;
+  border-radius: 9999px;
+  background: rgba(212, 179, 131, 0.2);
+  color: #d4b383;
+  font-size: 0.75rem;
+}
+
+.empty-state {
+  padding: 3rem;
+  text-align: center;
+  color: rgba(255, 255, 255, 0.5);
+}
+</style>
diff --git a/client/src/router.ts b/client/src/router.ts
index a99a8e8..a85c27b 100644
--- a/client/src/router.ts
+++ b/client/src/router.ts
@@ -171,7 +171,11 @@ const routes = [
 
       // 系统配置
       { path: 'settings', name: 'admin-settings', component: () => import('./pages/admin/Settings.vue') },
-      
+
+      { path: 'ppt-templates', name: 'admin-ppt-templates', component: () => import('./pages/admin/PptTemplates.vue') },
+      { path: 'ppt-templates/create', name: 'admin-ppt-templates-create', component: () => import('./pages/admin/PptTemplateForm.vue') },
+      { path: 'ppt-templates/:id/edit', name: 'admin-ppt-templates-edit', component: () => import('./pages/admin/PptTemplateForm.vue') },
+
       // 操作日志
       { path: 'logs', name: 'admin-logs', component: () => import('./pages/admin/Logs.vue') },
       
diff --git a/client/src/services/api.ts b/client/src/services/api.ts
index cd1a60c..edc2768 100644
--- a/client/src/services/api.ts
+++ b/client/src/services/api.ts
@@ -1,4 +1,5 @@
 import { useAuth } from '../composables/useAuth'
+import type { PptTemplateConfig, PptTemplateFormData } from '../types/pptTemplate'
 
 export const API_BASE = '/api'
 
@@ -2257,3 +2258,65 @@ export const deleteVideo = async (id: string): Promise<void> => {
   }))
 }
 
+// PPT 模板
+export interface PptTemplateApiItem {
+  id: number
+  name: string
+  slug: string
+  description: string
+  config: PptTemplateConfig | string
+  isSystem: boolean
+  isDefault: boolean
+  sortOrder: number
+  isActive: boolean
+  createdAt?: string
+  updatedAt?: string
+}
+
+export const fetchPptTemplates = async (): Promise<PptTemplateApiItem[]> => {
+  const response = await fetch(`${API_BASE}/ppt-templates`)
+  return (await parseApiResponse<PptTemplateApiItem[]>(response)) || []
+}
+
+export const fetchDefaultPptTemplate = async (): Promise<PptTemplateApiItem> => {
+  const response = await fetch(`${API_BASE}/ppt-templates/default`)
+  return await parseApiResponse<PptTemplateApiItem>(response)
+}
+
+export const fetchAdminPptTemplates = async (): Promise<PptTemplateApiItem[]> => {
+  const response = await authFetch(`${API_BASE}/admin/ppt-templates`, {
+    headers: getAuthHeaders(),
+  })
+  return (await parseApiResponse<PptTemplateApiItem[]>(response)) || []
+}
+
+export const createPptTemplate = async (data: PptTemplateFormData): Promise<PptTemplateApiItem> => {
+  const response = await authFetch(`${API_BASE}/admin/ppt-templates`, {
+    method: 'POST',
+    headers: getAuthHeaders(),
+    body: JSON.stringify(data),
+  })
+  return await parseApiResponse<PptTemplateApiItem>(response)
+}
+
+export const updatePptTemplate = async (
+  id: number,
+  data: PptTemplateFormData
+): Promise<PptTemplateApiItem> => {
+  const response = await authFetch(`${API_BASE}/admin/ppt-templates/${id}`, {
+    method: 'PUT',
+    headers: getAuthHeaders(),
+    body: JSON.stringify(data),
+  })
+  return await parseApiResponse<PptTemplateApiItem>(response)
+}
+
+export const deletePptTemplate = async (id: number): Promise<void> => {
+  await parseApiResponse(
+    await authFetch(`${API_BASE}/admin/ppt-templates/${id}`, {
+      method: 'DELETE',
+      headers: getAuthHeaders(),
+    })
+  )
+}
+
diff --git a/client/src/styles/pptPreview.css b/client/src/styles/pptPreview.css
index c34ed6a..4072b0e 100644
--- a/client/src/styles/pptPreview.css
+++ b/client/src/styles/pptPreview.css
@@ -1,23 +1,6 @@
 /* PPT 预览幻灯片样式 */
 
 .ppt-preview-root {
-  --ppt-bg: #f8f7f4;
-  --ppt-text: #1a1a1a;
-  --ppt-muted: #666666;
-  --ppt-accent: #c9a962;
-  --ppt-code-bg: #1e1e1e;
-  --ppt-code-text: #eeeeee;
-  --ppt-border: rgba(0, 0, 0, 0.08);
-  --ppt-chrome-h: 8.5rem;
-  --ppt-ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
-  --ppt-duration-reveal: 0.95s;
-  --ppt-duration-reveal-leave: 0.65s;
-  --ppt-duration-slide: 0.85s;
-  --ppt-duration-layout: 0.75s;
-  --ppt-reveal-offset: 10px;
-}
-
-.ppt-preview-root.ppt-theme-dark {
   --ppt-bg: #141414;
   --ppt-text: #f5f5f5;
   --ppt-muted: #a0a0a0;
@@ -25,6 +8,14 @@
   --ppt-code-bg: #1e1e1e;
   --ppt-code-text: #eeeeee;
   --ppt-border: rgba(255, 255, 255, 0.1);
+  --ppt-chrome-h: 8.5rem;
+  --ppt-ease-soft: cubic-bezier(0.22, 1, 0.36, 1);
+  --ppt-duration-reveal: 0.95s;
+  --ppt-duration-reveal-leave: 0.65s;
+  --ppt-duration-slide: 0.85s;
+  --ppt-duration-layout: 0.75s;
+  --ppt-reveal-offset: 10px;
+  --ppt-canvas-radius: 0.5rem;
 }
 
 /* 舞台与缩放容器 */
@@ -121,7 +112,7 @@
   background: var(--ppt-bg);
   color: var(--ppt-text);
   border: 1px solid var(--ppt-border);
-  border-radius: 0.5rem;
+  border-radius: var(--ppt-canvas-radius, 0.5rem);
   overflow: hidden;
   display: flex;
   flex-direction: column;
@@ -453,6 +444,93 @@
   transform: translateX(8px) scale(0.985);
 }
 
+/* 页间切换：纯淡入淡出 */
+.ppt-slide-fade-enter-active,
+.ppt-slide-fade-leave-active,
+.ppt-slide-back-fade-enter-active,
+.ppt-slide-back-fade-leave-active {
+  transition: opacity var(--ppt-duration-slide) var(--ppt-ease-soft);
+  position: absolute;
+  inset: 0;
+  width: 100%;
+  height: 100%;
+}
+
+.ppt-slide-fade-leave-active,
+.ppt-slide-back-fade-leave-active {
+  z-index: 1;
+}
+
+.ppt-slide-fade-enter-active,
+.ppt-slide-back-fade-enter-active {
+  z-index: 2;
+}
+
+.ppt-slide-fade-enter-from,
+.ppt-slide-fade-leave-to,
+.ppt-slide-back-fade-enter-from,
+.ppt-slide-back-fade-leave-to {
+  opacity: 0;
+}
+
+/* 页间切换：推入（更明显位移） */
+.ppt-slide-push-enter-active,
+.ppt-slide-push-leave-active,
+.ppt-slide-back-push-enter-active,
+.ppt-slide-back-push-leave-active {
+  transition:
+    opacity var(--ppt-duration-slide) var(--ppt-ease-soft),
+    transform var(--ppt-duration-slide) var(--ppt-ease-soft);
+  position: absolute;
+  inset: 0;
+  width: 100%;
+  height: 100%;
+}
+
+.ppt-slide-push-leave-active,
+.ppt-slide-back-push-leave-active {
+  z-index: 1;
+}
+
+.ppt-slide-push-enter-active,
+.ppt-slide-back-push-enter-active {
+  z-index: 2;
+}
+
+.ppt-slide-push-enter-from {
+  opacity: 0;
+  transform: translateX(24px) scale(0.98);
+}
+
+.ppt-slide-push-leave-to {
+  opacity: 0;
+  transform: translateX(-24px) scale(0.98);
+}
+
+.ppt-slide-back-push-enter-from {
+  opacity: 0;
+  transform: translateX(-24px) scale(0.98);
+}
+
+.ppt-slide-back-push-leave-to {
+  opacity: 0;
+  transform: translateX(24px) scale(0.98);
+}
+
+/* 分步揭示：纯淡入 */
+.ppt-reveal-fade-enter-active {
+  transition: opacity var(--ppt-duration-reveal) var(--ppt-ease-soft);
+}
+
+.ppt-reveal-fade-leave-active {
+  transition: opacity var(--ppt-duration-reveal-leave) var(--ppt-ease-soft);
+}
+
+.ppt-reveal-fade-enter-from,
+.ppt-reveal-fade-leave-to {
+  opacity: 0;
+}
+
 .ppt-thumbnail {
   aspect-ratio: 16 / 9;
   width: 7rem;
@@ -485,10 +563,20 @@
 @media (prefers-reduced-motion: reduce) {
   .ppt-reveal-enter-active,
   .ppt-reveal-leave-active,
+  .ppt-reveal-fade-enter-active,
+  .ppt-reveal-fade-leave-active,
   .ppt-slide-enter-active,
   .ppt-slide-leave-active,
   .ppt-slide-back-enter-active,
   .ppt-slide-back-leave-active,
+  .ppt-slide-fade-enter-active,
+  .ppt-slide-fade-leave-active,
+  .ppt-slide-back-fade-enter-active,
+  .ppt-slide-back-fade-leave-active,
+  .ppt-slide-push-enter-active,
+  .ppt-slide-push-leave-active,
+  .ppt-slide-back-push-enter-active,
+  .ppt-slide-back-push-leave-active,
   .ppt-slide-section-header,
   .ppt-slide-section-title,
   .ppt-slide-canvas {
@@ -497,10 +585,20 @@
 
   .ppt-reveal-enter-from,
   .ppt-reveal-leave-to,
+  .ppt-reveal-fade-enter-from,
+  .ppt-reveal-fade-leave-to,
   .ppt-slide-enter-from,
   .ppt-slide-leave-to,
   .ppt-slide-back-enter-from,
-  .ppt-slide-back-leave-to {
+  .ppt-slide-back-leave-to,
+  .ppt-slide-fade-enter-from,
+  .ppt-slide-fade-leave-to,
+  .ppt-slide-back-fade-enter-from,
+  .ppt-slide-back-fade-leave-to,
+  .ppt-slide-push-enter-from,
+  .ppt-slide-push-leave-to,
+  .ppt-slide-back-push-enter-from,
+  .ppt-slide-back-push-leave-to {
     transform: none;
   }
 }
diff --git a/client/src/types/pptTemplate.ts b/client/src/types/pptTemplate.ts
new file mode 100644
index 0000000..b40c3a8
--- /dev/null
+++ b/client/src/types/pptTemplate.ts
@@ -0,0 +1,69 @@
+export type PptSlideTransition = 'crossfade' | 'fade' | 'push'
+export type PptRevealTransition = 'fadeUp' | 'fade'
+
+export interface PptTemplateColors {
+  bg: string
+  text: string
+  muted: string
+  accent: string
+  codeBg: string
+  codeText: string
+  border: string
+}
+
+export interface PptTemplateAnimation {
+  revealDuration: string
+  revealLeaveDuration: string
+  slideDuration: string
+  layoutDuration: string
+  revealOffset: string
+  easing: string
+}
+
+export interface PptTemplateTransitions {
+  slide: PptSlideTransition
+  reveal: PptRevealTransition
+}
+
+export interface PptTemplateUi {
+  showThumbnailsDefault: boolean
+  canvasBorderRadius: string
+}
+
+export interface PptTemplateConfig {
+  colors: PptTemplateColors
+  animation: PptTemplateAnimation
+  transitions: PptTemplateTransitions
+  ui: PptTemplateUi
+}
+
+export interface PptTemplate {
+  id: number
+  name: string
+  slug: string
+  description: string
+  config: PptTemplateConfig
+  isSystem: boolean
+  isDefault: boolean
+  sortOrder: number
+  isActive: boolean
+  createdAt?: string
+  updatedAt?: string
+}
+
+export interface PptTemplateFormData {
+  name: string
+  slug: string
+  description: string
+  config: PptTemplateConfig
+  isDefault: boolean
+  sortOrder: number
+  isActive: boolean
+}
+
+export interface PptTemplateApplied {
+  templateVars: Record<string, string>
+  slideTransitionForward: string
+  slideTransitionBackward: string
+  revealTransition: string
+}
diff --git a/client/src/utils/applyPptTemplate.ts b/client/src/utils/applyPptTemplate.ts
new file mode 100644
index 0000000..6e26444
--- /dev/null
+++ b/client/src/utils/applyPptTemplate.ts
@@ -0,0 +1,52 @@
+import type {
+  PptTemplateApplied,
+  PptTemplateConfig,
+  PptRevealTransition,
+  PptSlideTransition,
+} from '../types/pptTemplate'
+
+export function getSlideTransitionNames(slide: PptSlideTransition): {
+  forward: string
+  backward: string
+} {
+  switch (slide) {
+    case 'fade':
+      return { forward: 'ppt-slide-fade', backward: 'ppt-slide-back-fade' }
+    case 'push':
+      return { forward: 'ppt-slide-push', backward: 'ppt-slide-back-push' }
+    default:
+      return { forward: 'ppt-slide', backward: 'ppt-slide-back' }
+  }
+}
+
+export function getRevealTransitionName(reveal: PptRevealTransition): string {
+  return reveal === 'fade' ? 'ppt-reveal-fade' : 'ppt-reveal'
+}
+
+/** 将模板 config 转为 CSS 变量与 transition 名 */
+export function applyPptTemplate(config: PptTemplateConfig): PptTemplateApplied {
+  const { colors, animation, transitions, ui } = config
+  const slideNames = getSlideTransitionNames(transitions.slide)
+
+  return {
+    templateVars: {
+      '--ppt-bg': colors.bg,
+      '--ppt-text': colors.text,
+      '--ppt-muted': colors.muted,
+      '--ppt-accent': colors.accent,
+      '--ppt-code-bg': colors.codeBg,
+      '--ppt-code-text': colors.codeText,
+      '--ppt-border': colors.border,
+      '--ppt-ease-soft': animation.easing,
+      '--ppt-duration-reveal': animation.revealDuration,
+      '--ppt-duration-reveal-leave': animation.revealLeaveDuration,
+      '--ppt-duration-slide': animation.slideDuration,
+      '--ppt-duration-layout': animation.layoutDuration,
+      '--ppt-reveal-offset': animation.revealOffset,
+      '--ppt-canvas-radius': ui.canvasBorderRadius,
+    },
+    slideTransitionForward: slideNames.forward,
+    slideTransitionBackward: slideNames.backward,
+    revealTransition: getRevealTransitionName(transitions.reveal),
+  }
+}
diff --git a/server/handlers/ppt_template.go b/server/handlers/ppt_template.go
new file mode 100644
index 0000000..8b93c87
--- /dev/null
+++ b/server/handlers/ppt_template.go
@@ -0,0 +1,225 @@
+package handlers
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/niangaodev/art-code/models"
+	"github.com/niangaodev/art-code/repositories"
+	"github.com/niangaodev/art-code/utils"
+)
+
+func pptTemplatePayloads(list []models.PptTemplate) ([]models.PptTemplatePayload, error) {
+	out := make([]models.PptTemplatePayload, 0, len(list))
+	for i := range list {
+		p, err := repositories.ToPptTemplatePayload(&list[i])
+		if err != nil {
+			return nil, err
+		}
+		out = append(out, p)
+	}
+	return out, nil
+}
+
+// GetPptTemplates 公开：获取启用的 PPT 模板
+func GetPptTemplates(c *gin.Context) {
+	list, err := repositories.GetActivePptTemplates()
+	if err != nil {
+		utils.ServerError(c, err)
+		return
+	}
+	payloads, err := pptTemplatePayloads(list)
+	if err != nil {
+		utils.ServerError(c, err)
+		return
+	}
+	if payloads == nil {
+		payloads = []models.PptTemplatePayload{}
+	}
+	utils.Success(c, payloads)
+}
+
+// GetDefaultPptTemplate 公开：获取系统默认模板
+func GetDefaultPptTemplate(c *gin.Context) {
+	t, err := repositories.GetSystemPptTemplate()
+	if err != nil {
+		utils.Error(c, 404, "Default template not found")
+		return
+	}
+	payload, err := repositories.ToPptTemplatePayload(t)
+	if err != nil {
+		utils.ServerError(c, err)
+		return
+	}
+	utils.Success(c, payload)
+}
+
+// AdminGetPptTemplates 管理：获取全部模板
+func AdminGetPptTemplates(c *gin.Context) {
+	list, err := repositories.GetAllPptTemplates()
+	if err != nil {
+		utils.ServerError(c, err)
+		return
+	}
+	payloads, err := pptTemplatePayloads(list)
+	if err != nil {
+		utils.ServerError(c, err)
+		return
+	}
+	if payloads == nil {
+		payloads = []models.PptTemplatePayload{}
+	}
+	utils.Success(c, payloads)
+}
+
+// AdminCreatePptTemplate 管理：创建模板
+func AdminCreatePptTemplate(c *gin.Context) {
+	var req models.PptTemplatePayload
+	if err := c.ShouldBindJSON(&req); err != nil {
+		utils.Error(c, 400, "Invalid request")
+		return
+	}
+
+	req.Name = strings.TrimSpace(req.Name)
+	req.Slug = strings.TrimSpace(req.Slug)
+	if req.Name == "" || req.Slug == "" {
+		utils.Error(c, 400, "Name and slug are required")
+		return
+	}
+	if req.Slug == repositories.DefaultPptTemplateSlug {
+		utils.Error(c, 400, "Slug 'default' is reserved for system template")
+		return
+	}
+
+	configJSON, err := repositories.SerializePptTemplateConfig(req.Config)
+	if err != nil {
+		utils.Error(c, 400, "Invalid config JSON")
+		return
+	}
+
+	t := models.PptTemplate{
+		Name:        req.Name,
+		Slug:        req.Slug,
+		Description: strings.TrimSpace(req.Description),
+		Config:      configJSON,
+		IsSystem:    false,
+		IsDefault:   req.IsDefault,
+		SortOrder:   req.SortOrder,
+		IsActive:    req.IsActive,
+	}
+
+	if err := repositories.CreatePptTemplate(&t); err != nil {
+		utils.ServerError(c, err)
+		return
+	}
+
+	if t.IsDefault {
+		_ = repositories.ClearDefaultPptTemplatesExcept(t.ID)
+	}
+
+	payload, err := repositories.ToPptTemplatePayload(&t)
+	if err != nil {
+		utils.ServerError(c, err)
+		return
+	}
+	utils.SuccessWithMsg(c, "PPT template created", payload)
+}
+
+// AdminUpdatePptTemplate 管理：更新模板
+func AdminUpdatePptTemplate(c *gin.Context) {
+	idStr := c.Param("id")
+	var id uint
+	if _, err := fmt.Sscanf(idStr, "%d", &id); err != nil {
+		utils.Error(c, 400, "Invalid ID")
+		return
+	}
+
+	existing, err := repositories.GetPptTemplateByID(id)
+	if err != nil {
+		utils.Error(c, 404, "Template not found")
+		return
+	}
+
+	var req models.PptTemplatePayload
+	if err := c.ShouldBindJSON(&req); err != nil {
+		utils.Error(c, 400, "Invalid request")
+		return
+	}
+
+	req.Name = strings.TrimSpace(req.Name)
+	if req.Name == "" {
+		utils.Error(c, 400, "Name is required")
+		return
+	}
+
+	configJSON, err := repositories.SerializePptTemplateConfig(req.Config)
+	if err != nil {
+		utils.Error(c, 400, "Invalid config JSON")
+		return
+	}
+
+	t := *existing
+	t.Name = req.Name
+	t.Description = strings.TrimSpace(req.Description)
+	t.Config = configJSON
+	t.SortOrder = req.SortOrder
+
+	if existing.IsSystem {
+		t.Slug = repositories.DefaultPptTemplateSlug
+		t.IsSystem = true
+		t.IsActive = true
+		t.IsDefault = req.IsDefault
+	} else {
+		req.Slug = strings.TrimSpace(req.Slug)
+		if req.Slug == "" {
+			utils.Error(c, 400, "Slug is required")
+			return
+		}
+		if req.Slug == repositories.DefaultPptTemplateSlug {
+			utils.Error(c, 400, "Slug 'default' is reserved")
+			return
+		}
+		t.Slug = req.Slug
+		t.IsDefault = req.IsDefault
+		t.IsActive = req.IsActive
+	}
+
+	if err := repositories.UpdatePptTemplate(&t); err != nil {
+		utils.ServerError(c, err)
+		return
+	}
+
+	if t.IsDefault {
+		_ = repositories.ClearDefaultPptTemplatesExcept(t.ID)
+	}
+
+	payload, err := repositories.ToPptTemplatePayload(&t)
+	if err != nil {
+		utils.ServerError(c, err)
+		return
+	}
+	utils.SuccessWithMsg(c, "PPT template updated", payload)
+}
+
+// AdminDeletePptTemplate 管理：删除模板
+func AdminDeletePptTemplate(c *gin.Context) {
+	idStr := c.Param("id")
+	var id uint
+	if _, err := fmt.Sscanf(idStr, "%d", &id); err != nil {
+		utils.Error(c, 400, "Invalid ID")
+		return
+	}
+
+	if err := repositories.DeletePptTemplate(id); err != nil {
+		if errors.Is(err, repositories.ErrPptTemplateSystemDelete) {
+			utils.Error(c, 400, "System default template cannot be deleted")
+			return
+		}
+		utils.ServerError(c, err)
+		return
+	}
+
+	utils.SuccessWithMsg(c, "PPT template deleted", nil)
+}
diff --git a/server/main.go b/server/main.go
index 88e783e..1fe228b 100644
--- a/server/main.go
+++ b/server/main.go
@@ -28,6 +28,7 @@ func main() {
 	repositories.MigrateUserAvatar()
 	repositories.MigrateUserProfileFields()
 	repositories.MigrateVideoModule()
+	repositories.MigratePptTemplates()
 
 	// 初始化ip2region (如果文件不存在，将降级为普通IP记录)
 	// 函数会自动从环境变量或可执行文件目录查找 ip2region.xdb
@@ -108,6 +109,10 @@ func main() {
 		api.GET("/testimonials", handlers.GetTestimonials)
 		api.GET("/partners", handlers.GetPartners)
 
+		// PPT 模板
+		api.GET("/ppt-templates", handlers.GetPptTemplates)
+		api.GET("/ppt-templates/default", handlers.GetDefaultPptTemplate)
+
 		// 咨询相关路由
 		api.POST("/inquiries", handlers.SubmitInquiry)
 		api.GET("/email-suffixes", handlers.GetEmailSuffixes)
@@ -258,6 +263,12 @@ func main() {
 			authAdmin.PUT("/partners/:id", middleware.PermissionMiddleware("settings", "update"), handlers.AdminUpdatePartner)
 			authAdmin.DELETE("/partners/:id", middleware.PermissionMiddleware("settings", "delete"), handlers.AdminDeletePartner)
 
+			// PPT 模板管理 (复用 settings 权限)
+			authAdmin.GET("/ppt-templates", middleware.PermissionMiddleware("settings", "read"), handlers.AdminGetPptTemplates)
+			authAdmin.POST("/ppt-templates", middleware.PermissionMiddleware("settings", "create"), handlers.AdminCreatePptTemplate)
+			authAdmin.PUT("/ppt-templates/:id", middleware.PermissionMiddleware("settings", "update"), handlers.AdminUpdatePptTemplate)
+			authAdmin.DELETE("/ppt-templates/:id", middleware.PermissionMiddleware("settings", "delete"), handlers.AdminDeletePptTemplate)
+
 			// 咨询管理
 			authAdmin.GET("/inquiries", middleware.PermissionMiddleware("settings", "read"), handlers.AdminGetInquiries)
 			authAdmin.PUT("/inquiries/:id/status", middleware.PermissionMiddleware("settings", "update"), handlers.AdminUpdateInquiryStatus)
diff --git a/server/models/ppt_template.go b/server/models/ppt_template.go
new file mode 100644
index 0000000..55e637a
--- /dev/null
+++ b/server/models/ppt_template.go
@@ -0,0 +1,58 @@
+package models
+
+import (
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// PptTemplate PPT 演示模板
+type PptTemplate struct {
+	ID          uint   `json:"id" gorm:"primaryKey;column:id"`
+	Name        string `json:"name" gorm:"column:name"`
+	Slug        string `json:"slug" gorm:"column:slug;uniqueIndex"`
+	Description string `json:"description" gorm:"column:description;type:text"`
+	Config      string `json:"-" gorm:"column:config;type:longtext"`
+	IsSystem    bool   `json:"isSystem" gorm:"column:is_system;default:0"`
+	IsDefault   bool   `json:"isDefault" gorm:"column:is_default;default:0"`
+	SortOrder   int    `json:"sortOrder" gorm:"column:sort_order;default:0"`
+	IsActive    bool   `json:"isActive" gorm:"column:is_active;default:1"`
+	CreatedAt   int64  `json:"createdAt" gorm:"column:created_at"`
+	UpdatedAt   int64  `json:"updatedAt" gorm:"column:updated_at"`
+	DeletedAt   int64  `json:"deletedAt" gorm:"column:deleted_at;default:0"`
+}
+
+func (PptTemplate) TableName() string {
+	return "ppt_templates"
+}
+
+func (t *PptTemplate) BeforeCreate(tx *gorm.DB) error {
+	now := time.Now().Unix()
+	if t.CreatedAt == 0 {
+		t.CreatedAt = now
+	}
+	if t.UpdatedAt == 0 {
+		t.UpdatedAt = now
+	}
+	return nil
+}
+
+func (t *PptTemplate) BeforeUpdate(tx *gorm.DB) error {
+	t.UpdatedAt = time.Now().Unix()
+	return nil
+}
+
+// PptTemplatePayload API 请求/响应载荷（config 为 JSON 对象）
+type PptTemplatePayload struct {
+	ID          uint        `json:"id"`
+	Name        string      `json:"name"`
+	Slug        string      `json:"slug"`
+	Description string      `json:"description"`
+	Config      interface{} `json:"config"`
+	IsSystem    bool        `json:"isSystem"`
+	IsDefault   bool        `json:"isDefault"`
+	SortOrder   int         `json:"sortOrder"`
+	IsActive    bool        `json:"isActive"`
+	CreatedAt   int64       `json:"createdAt,omitempty"`
+	UpdatedAt   int64       `json:"updatedAt,omitempty"`
+}
diff --git a/server/repositories/migration.go b/server/repositories/migration.go
index c5ac283..940eb08 100644
--- a/server/repositories/migration.go
+++ b/server/repositories/migration.go
@@ -293,3 +293,58 @@ func MigrateVideoModule() {
 		}
 	}
 }
+
+// MigratePptTemplates 创建 PPT 模板表并补种系统默认模板
+func MigratePptTemplates() {
+	log.Printf("Migrating ppt templates...")
+
+	if !tableExists("ppt_templates") {
+		execSQL(`CREATE TABLE ppt_templates (
+			id INT UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '模板ID',
+			name VARCHAR(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL COMMENT '模板显示名称',
+			slug VARCHAR(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL COMMENT 'URL唯一标识（系统默认为default）',
+			description TEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '模板描述',
+			config LONGTEXT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL COMMENT 'PPT样式配置JSON（配色/动画/切换/UI）',
+			is_system TINYINT(1) NOT NULL DEFAULT 0 COMMENT '是否系统内置模板（0否 1是，不可删除）',
+			is_default TINYINT(1) NOT NULL DEFAULT 0 COMMENT '是否演示默认模板（0否 1是）',
+			sort_order INT NOT NULL DEFAULT 0 COMMENT '排序（越小越靠前）',
+			is_active TINYINT(1) NOT NULL DEFAULT 1 COMMENT '是否启用（0否 1是）',
+			deleted_at BIGINT NOT NULL DEFAULT 0 COMMENT '软删除时间戳',
+			created_at BIGINT NOT NULL DEFAULT 0 COMMENT '创建时间（Unix秒）',
+			updated_at BIGINT NOT NULL DEFAULT 0 COMMENT '更新时间（Unix秒）',
+			PRIMARY KEY (id),
+			UNIQUE INDEX idx_slug (slug)
+		) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='PPT模板表'`)
+	} else {
+		ensurePptTemplateColumnComments()
+	}
+
+	EnsureSystemPptTemplate()
+}
+
+// ensurePptTemplateColumnComments 为已存在但缺少字段备注的 ppt_templates 表补全 COMMENT
+func ensurePptTemplateColumnComments() {
+	if !tableExists("ppt_templates") {
+		return
+	}
+
+	alters := []string{
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `id` int UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '模板ID'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `name` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL COMMENT '模板显示名称'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `slug` varchar(100) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL COMMENT 'URL唯一标识（系统默认为default）'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `description` text CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NULL COMMENT '模板描述'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `config` longtext CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL COMMENT 'PPT样式配置JSON（配色/动画/切换/UI）'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `is_system` tinyint(1) NOT NULL DEFAULT 0 COMMENT '是否系统内置模板（0否 1是，不可删除）'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `is_default` tinyint(1) NOT NULL DEFAULT 0 COMMENT '是否演示默认模板（0否 1是）'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `sort_order` int NOT NULL DEFAULT 0 COMMENT '排序（越小越靠前）'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `is_active` tinyint(1) NOT NULL DEFAULT 1 COMMENT '是否启用（0否 1是）'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `deleted_at` bigint NOT NULL DEFAULT 0 COMMENT '软删除时间戳'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `created_at` bigint NOT NULL DEFAULT 0 COMMENT '创建时间（Unix秒）'",
+		"ALTER TABLE `ppt_templates` MODIFY COLUMN `updated_at` bigint NOT NULL DEFAULT 0 COMMENT '更新时间（Unix秒）'",
+		"ALTER TABLE `ppt_templates` COMMENT='PPT模板表'",
+	}
+
+	for _, sql := range alters {
+		execSQL(sql)
+	}
+}
diff --git a/server/repositories/ppt_template_repository.go b/server/repositories/ppt_template_repository.go
new file mode 100644
index 0000000..2b1b013
--- /dev/null
+++ b/server/repositories/ppt_template_repository.go
@@ -0,0 +1,170 @@
+package repositories
+
+import (
+	"encoding/json"
+	"errors"
+	"log"
+	"time"
+
+	"github.com/niangaodev/art-code/config"
+	"github.com/niangaodev/art-code/models"
+)
+
+const DefaultPptTemplateSlug = "default"
+
+const DefaultPptTemplateConfigJSON = `{"colors":{"bg":"#141414","text":"#f5f5f5","muted":"#a0a0a0","accent":"#c9a962","codeBg":"#1e1e1e","codeText":"#eeeeee","border":"rgba(255, 255, 255, 0.1)"},"animation":{"revealDuration":"0.95s","revealLeaveDuration":"0.65s","slideDuration":"0.85s","layoutDuration":"0.75s","revealOffset":"10px","easing":"cubic-bezier(0.22, 1, 0.36, 1)"},"transitions":{"slide":"crossfade","reveal":"fadeUp"},"ui":{"showThumbnailsDefault":true,"canvasBorderRadius":"0.5rem"}}`
+
+var ErrPptTemplateSystemDelete = errors.New("system ppt template cannot be deleted")
+
+func GetActivePptTemplates() ([]models.PptTemplate, error) {
+	var list []models.PptTemplate
+	err := config.DB.Model(&models.PptTemplate{}).
+		Where("deleted_at = ? AND is_active = ?", 0, true).
+		Order("sort_order ASC, id ASC").
+		Find(&list).Error
+	return list, err
+}
+
+func GetAllPptTemplates() ([]models.PptTemplate, error) {
+	var list []models.PptTemplate
+	err := config.DB.Model(&models.PptTemplate{}).
+		Where("deleted_at = ?", 0).
+		Order("sort_order ASC, id ASC").
+		Find(&list).Error
+	return list, err
+}
+
+func GetPptTemplateByID(id uint) (*models.PptTemplate, error) {
+	var t models.PptTemplate
+	err := config.DB.Model(&models.PptTemplate{}).
+		Where("id = ? AND deleted_at = ?", id, 0).
+		First(&t).Error
+	if err != nil {
+		return nil, err
+	}
+	return &t, nil
+}
+
+func GetSystemPptTemplate() (*models.PptTemplate, error) {
+	var t models.PptTemplate
+	err := config.DB.Model(&models.PptTemplate{}).
+		Where("slug = ? AND deleted_at = ?", DefaultPptTemplateSlug, 0).
+		First(&t).Error
+	if err != nil {
+		return nil, err
+	}
+	return &t, nil
+}
+
+func CreatePptTemplate(t *models.PptTemplate) error {
+	return config.DB.Create(t).Error
+}
+
+func UpdatePptTemplate(t *models.PptTemplate) error {
+	return config.DB.Model(&models.PptTemplate{}).
+		Where("id = ? AND deleted_at = ?", t.ID, 0).
+		Updates(map[string]interface{}{
+			"name":        t.Name,
+			"slug":        t.Slug,
+			"description": t.Description,
+			"config":      t.Config,
+			"is_default":  t.IsDefault,
+			"sort_order":  t.SortOrder,
+			"is_active":   t.IsActive,
+			"updated_at":  time.Now().Unix(),
+		}).Error
+}
+
+func DeletePptTemplate(id uint) error {
+	t, err := GetPptTemplateByID(id)
+	if err != nil {
+		return err
+	}
+	if t.IsSystem {
+		return ErrPptTemplateSystemDelete
+	}
+	return config.DB.Model(&models.PptTemplate{}).
+		Where("id = ?", id).
+		Update("deleted_at", time.Now().Unix()).Error
+}
+
+func ClearDefaultPptTemplatesExcept(id uint) error {
+	q := config.DB.Model(&models.PptTemplate{}).
+		Where("deleted_at = ? AND is_default = ?", 0, true)
+	if id > 0 {
+		q = q.Where("id <> ?", id)
+	}
+	return q.Update("is_default", false).Error
+}
+
+func EnsureSystemPptTemplate() {
+	if !tableExists("ppt_templates") {
+		return
+	}
+	var count int64
+	config.DB.Model(&models.PptTemplate{}).
+		Where("slug = ? AND deleted_at = ?", DefaultPptTemplateSlug, 0).
+		Count(&count)
+	if count > 0 {
+		return
+	}
+
+	now := time.Now().Unix()
+	t := models.PptTemplate{
+		Name:        "默认模板",
+		Slug:        DefaultPptTemplateSlug,
+		Description: "系统内置 PPT 演示默认样式",
+		Config:      DefaultPptTemplateConfigJSON,
+		IsSystem:    true,
+		IsDefault:   true,
+		SortOrder:   0,
+		IsActive:    true,
+		CreatedAt:   now,
+		UpdatedAt:   now,
+	}
+	if err := config.DB.Create(&t).Error; err != nil {
+		log.Printf("Failed to seed system ppt template: %v", err)
+	}
+}
+
+func ParsePptTemplateConfigJSON(raw string) (map[string]interface{}, error) {
+	var cfg map[string]interface{}
+	if raw == "" {
+		raw = DefaultPptTemplateConfigJSON
+	}
+	if err := json.Unmarshal([]byte(raw), &cfg); err != nil {
+		return nil, err
+	}
+	return cfg, nil
+}
+
+func SerializePptTemplateConfig(cfg interface{}) (string, error) {
+	if cfg == nil {
+		return DefaultPptTemplateConfigJSON, nil
+	}
+	b, err := json.Marshal(cfg)
+	if err != nil {
+		return "", err
+	}
+	return string(b), nil
+}
+
+func ToPptTemplatePayload(t *models.PptTemplate) (models.PptTemplatePayload, error) {
+	cfg, err := ParsePptTemplateConfigJSON(t.Config)
+	if err != nil {
+		return models.PptTemplatePayload{}, err
+	}
+	return models.PptTemplatePayload{
+		ID:          t.ID,
+		Name:        t.Name,
+		Slug:        t.Slug,
+		Description: t.Description,
+		Config:      cfg,
+		IsSystem:    t.IsSystem,
+		IsDefault:   t.IsDefault,
+		SortOrder:   t.SortOrder,
+		IsActive:    t.IsActive,
+		CreatedAt:   t.CreatedAt,
+		UpdatedAt:   t.UpdatedAt,
+	}, nil
+}