diff --git a/src/App.vue b/src/App.vue
index bee13c6..18dfcef 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -3,10 +3,13 @@ import { ref, onMounted } from 'vue'
 import PromptEditor from './components/PromptEditor.vue'
 import PromptManager from './components/PromptManager.vue'
 import PresetManager from './components/PresetManager.vue'
+import BackgroundCanvas from './components/BackgroundCanvas.vue'
+import DevtoolsBanner from './components/DevtoolsBanner.vue'
 import { usePromptStore } from './stores/promptStore'
 
 const currentView = ref<'editor' | 'manager' | 'presets'>('editor')
 const isDark = ref(false)
+const showBackground = ref(true)
 const store = usePromptStore()
 
 onMounted(() => {
@@ -16,6 +19,8 @@ onMounted(() => {
   updateTheme()
   // 初始化词库与编辑器状态（仅一次）
   store.initialize()
+  const bg = localStorage.getItem('bg.enabled')
+  showBackground.value = bg === null ? true : bg === 'on'
 })
 
 function toggleTheme() {
@@ -31,13 +36,20 @@ function updateTheme() {
 function switchView(view: 'editor' | 'manager' | 'presets') {
   currentView.value = view
 }
+
+function toggleBackground() {
+  showBackground.value = !showBackground.value
+  localStorage.setItem('bg.enabled', showBackground.value ? 'on' : 'off')
+}
 </script>
 
 <template>
   <div class="app-container" :class="{ dark: isDark }">
+    <BackgroundCanvas v-if="showBackground" />
+    <DevtoolsBanner />
     <!-- 顶部导航栏 -->
     <header class="app-header">
-      <div class="header-content">
+      <div class="header-content">  
         <div class="header-left">
           <a
             class="app-logo"
@@ -100,6 +112,18 @@ function switchView(view: 'editor' | 'manager' | 'presets') {
               <path d="M21 12.79A9 9 0 1 1 11.21 3 7 7 0 0 0 21 12.79z" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
             </svg>
           </button>
+          <button class="bg-toggle" :class="{ active: showBackground }" @click="toggleBackground" title="背景开关">
+            <svg v-if="showBackground" width="16" height="16" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+              <circle cx="6" cy="12" r="1.5" fill="currentColor"/>
+              <circle cx="12" cy="9" r="1.5" fill="currentColor"/>
+              <circle cx="18" cy="13" r="1.5" fill="currentColor"/>
+              <path d="M4 16c4-2 8-2 12 0" stroke="currentColor" stroke-width="1.5" stroke-linecap="round"/>
+            </svg>
+            <svg v-else width="16" height="16" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+              <path d="M5 5l14 14" stroke="currentColor" stroke-width="2" stroke-linecap="round"/>
+              <circle cx="12" cy="12" r="6" stroke="currentColor" stroke-width="2"/>
+            </svg>
+          </button>
         </div>
       </div>
     </header>
@@ -277,6 +301,30 @@ body {
   color: var(--color-text-primary);
 }
 
+.bg-toggle {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 2.5rem;
+  height: 2.5rem;
+  border: none;
+  background-color: var(--color-bg-secondary);
+  color: var(--color-text-secondary);
+  border-radius: var(--radius-md);
+  cursor: pointer;
+  transition: all 0.2s ease;
+}
+
+.bg-toggle:hover {
+  background-color: var(--color-bg-tertiary);
+  color: var(--color-text-primary);
+}
+
+.bg-toggle.active {
+  background-color: var(--color-accent);
+  color: white;
+}
+
 /* 主要内容区域 */
 .app-main {
   flex: 1;
diff --git a/src/components/BackgroundCanvas.vue b/src/components/BackgroundCanvas.vue
new file mode 100644
index 0000000..a881982
--- /dev/null
+++ b/src/components/BackgroundCanvas.vue
@@ -0,0 +1,189 @@
+<template>
+  <canvas ref="canvas" class="bg-canvas"></canvas>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted, onBeforeUnmount } from 'vue'
+
+const canvas = ref<HTMLCanvasElement | null>(null)
+
+let ctx: CanvasRenderingContext2D | null = null
+let width = 0
+let height = 0
+let dpr = 1
+let raf = 0
+let running = true
+
+type Particle = {
+  baseX: number
+  baseY: number
+  r: number
+  vx: number
+  vy: number
+  speed: number
+  phase: number
+  depth: number
+  alpha: number
+}
+
+let particles: Particle[] = []
+let mouseX = 0
+let mouseY = 0
+let lastThemeKey = ''
+
+function parseColor(c: string): [number, number, number] {
+  const s = c.trim()
+  if (s.startsWith('#')) {
+    const v = s.slice(1)
+    const n = v.length === 3 ? v.split('').map(ch => ch + ch).join('') : v
+    const r = parseInt(n.slice(0, 2), 16)
+    const g = parseInt(n.slice(2, 4), 16)
+    const b = parseInt(n.slice(4, 6), 16)
+    return [r, g, b]
+  }
+  const m = s.match(/rgb\s*\(\s*(\d+)\s*,\s*(\d+)\s*,\s*(\d+)\s*\)/i)
+  if (m) return [Number(m[1]), Number(m[2]), Number(m[3])]
+  return [219, 234, 254]
+}
+
+function mix(a: [number, number, number], b: [number, number, number], t: number): [number, number, number] {
+  return [
+    Math.round(a[0] * (1 - t) + b[0] * t),
+    Math.round(a[1] * (1 - t) + b[1] * t),
+    Math.round(a[2] * (1 - t) + b[2] * t)
+  ]
+}
+
+function luminance([r, g, b]: [number, number, number]) {
+  const sr = r / 255
+  const sg = g / 255
+  const sb = b / 255
+  return 0.2126 * sr + 0.7152 * sg + 0.0722 * sb
+}
+
+function getPalette() {
+  const cs = getComputedStyle(document.documentElement)
+  const accent = cs.getPropertyValue('--color-accent-light') || '#dbeafe'
+  const bg = cs.getPropertyValue('--color-bg-primary') || '#ffffff'
+  const a = parseColor(accent)
+  const b = parseColor(bg)
+  const mixed = mix(b, a, 3)
+  const key = `${mixed.join(',')}`
+  const lum = luminance(b)
+  const alpha = lum > 0.7 ? 0.42 : 0.28
+  return { rgb: mixed, key, alpha }
+}
+
+function resize() {
+  if (!canvas.value) return
+  dpr = Math.min(window.devicePixelRatio || 1, 2)
+  width = window.innerWidth
+  height = window.innerHeight
+  canvas.value.width = Math.floor(width * dpr)
+  canvas.value.height = Math.floor(height * dpr)
+  canvas.value.style.width = `${width}px`
+  canvas.value.style.height = `${height}px`
+}
+
+function initParticles() {
+  const area = width * height
+  const count = Math.max(80, Math.floor(area / (60 * 60)))
+  particles = Array.from({ length: count }).map(() => {
+    const depth = 0.35 + Math.random() * 0.65
+    const r = 0.9 + Math.random() * 1.6
+    const speed = 0.4 + Math.random() * 0.8
+    const vx = (Math.random() - 0.5) * 0.6
+    const vy = (Math.random() - 0.5) * 0.6
+    return {
+      baseX: Math.random() * width,
+      baseY: Math.random() * height,
+      r,
+      vx,
+      vy,
+      speed,
+      phase: Math.random() * Math.PI * 2,
+      depth,
+      alpha: 0.7 + Math.random() * 0.3
+    }
+  })
+}
+
+function draw() {
+  if (!ctx) return
+  const pal = getPalette()
+  if (pal.key !== lastThemeKey) lastThemeKey = pal.key
+  ctx.clearRect(0, 0, width * dpr, height * dpr)
+  ctx.globalCompositeOperation = 'source-over'
+  const [r, g, b] = pal.rgb
+  const t = performance.now() / 1000
+  const mx = (mouseX / width - 0.5)
+  const my = (mouseY / height - 0.5)
+  const offsetX = mx * 160
+  const offsetY = my * 100
+  for (const p of particles) {
+    const x = (p.baseX + Math.sin(t * p.speed + p.phase) * p.vx * 50 + offsetX * p.depth) * dpr
+    const y = (p.baseY + Math.cos(t * p.speed + p.phase) * p.vy * 50 + offsetY * p.depth) * dpr
+    const a = pal.alpha * p.alpha * (0.85 + 0.15 * Math.sin(t * (p.speed * 0.6) + p.phase))
+    ctx.fillStyle = `rgba(${r},${g},${b},${a})`
+    ctx.beginPath()
+    ctx.arc(x, y, Math.max(0.5, p.r * dpr), 0, Math.PI * 2)
+    ctx.fill()
+  }
+}
+
+let lastFrame = 0
+
+function loop(ts: number) {
+  if (!running) return
+  if (ts - lastFrame > 33) {
+    lastFrame = ts
+    draw()
+  }
+  raf = requestAnimationFrame(loop)
+}
+
+function onMouseMove(e: MouseEvent) {
+  mouseX = e.clientX
+  mouseY = e.clientY
+}
+
+function onVisibilityChange() {
+  running = !document.hidden
+  if (running) {
+    lastFrame = 0
+    raf = requestAnimationFrame(loop)
+  } else {
+    cancelAnimationFrame(raf)
+  }
+}
+
+onMounted(() => {
+  if (!canvas.value) return
+  ctx = canvas.value.getContext('2d')
+  resize()
+  initParticles()
+  window.addEventListener('resize', () => {
+    resize()
+    initParticles()
+  })
+  window.addEventListener('mousemove', onMouseMove, { passive: true })
+  document.addEventListener('visibilitychange', onVisibilityChange)
+  raf = requestAnimationFrame(loop)
+})
+
+onBeforeUnmount(() => {
+  running = false
+  cancelAnimationFrame(raf)
+  window.removeEventListener('mousemove', onMouseMove)
+  document.removeEventListener('visibilitychange', onVisibilityChange)
+})
+</script>
+
+<style>
+.bg-canvas {
+  position: fixed;
+  inset: 0;
+  z-index: 0;
+  pointer-events: none;
+}
+</style>
\ No newline at end of file
diff --git a/src/components/DevtoolsBanner.vue b/src/components/DevtoolsBanner.vue
new file mode 100644
index 0000000..d139f42
--- /dev/null
+++ b/src/components/DevtoolsBanner.vue
@@ -0,0 +1,81 @@
+<script setup lang="ts">
+import { onMounted, onBeforeUnmount } from 'vue'
+
+let running = false
+let watcher: number | null = null
+let anim: number | null = null
+let frame = 0
+
+const repoUrl = 'https://github.com/kjqwer/prompt'
+
+function waveFrame(f: number, width: number) {
+  const chars = ['▁','▂','▃','▄','▅','▆','▇','█']
+  let fmt = ''
+  const styles: string[] = []
+  for (let i = 0; i < width; i++) {
+    const t = (f * 0.35) + (i * 0.25)
+    const y = Math.sin(t)
+    const idx = Math.max(0, Math.min(chars.length - 1, Math.floor(((y + 1) / 2) * (chars.length - 1))))
+    const hue = (i * 12 + f * 9) % 360
+    fmt += '%c' + chars[idx]
+    styles.push(`color:hsl(${hue} 90% 60%); font-weight:900; font-size:16px;`)
+  }
+  console.log(fmt, ...styles)
+}
+
+function renderFrame() {
+  console.clear()
+  waveFrame(frame, 36)
+  const title = '%c✦ Prompt · 提示词编辑器'
+  const titleStyle = 'padding:12px 18px; font-size:16px; font-weight:800; color:#fff; background:linear-gradient(90deg,#0ea5e9,#22d3ee,#a78bfa,#f472b6,#fb7185); border-radius:10px; text-shadow:0 1px 1px rgba(0,0,0,.2);'
+  console.log(title, titleStyle)
+  const linkLabel = '%cGitHub ↗ ' + repoUrl
+  const linkStyle = 'color:#93c5fd; font-size:13px; font-weight:700;'
+  console.log(linkLabel, linkStyle)
+  const badge = '%c Inspire · Create · Play '
+  const badgeStyle = 'padding:6px 12px; font-size:12px; color:#111827; background:linear-gradient(90deg,#fde68a,#86efac,#93c5fd,#c4b5fd,#fbcfe8); border-radius:999px;'
+  console.log(badge, badgeStyle)
+  frame++
+}
+
+function startAnim() {
+  if (running) return
+  running = true
+  if (anim) clearInterval(anim)
+  anim = window.setInterval(renderFrame, 300)
+}
+
+function stopAnim() {
+  if (!running) return
+  running = false
+  if (anim) {
+    clearInterval(anim)
+    anim = null
+  }
+  console.clear()
+}
+
+function isDevtoolsOpen() {
+  const threshold = 160
+  const w = Math.abs(window.outerWidth - window.innerWidth)
+  const h = Math.abs(window.outerHeight - window.innerHeight)
+  return w > threshold || h > threshold
+}
+
+onMounted(() => {
+  watcher = window.setInterval(() => {
+    if (isDevtoolsOpen()) startAnim()
+    else stopAnim()
+  }, 600)
+})
+
+onBeforeUnmount(() => {
+  if (watcher) {
+    clearInterval(watcher)
+    watcher = null
+  }
+  stopAnim()
+})
+</script>
+
+<template></template>
\ No newline at end of file
diff --git a/src/stores/promptStore.ts b/src/stores/promptStore.ts
index 1e52b08..f451069 100644
--- a/src/stores/promptStore.ts
+++ b/src/stores/promptStore.ts
@@ -97,6 +97,7 @@ export const usePromptStore = defineStore('promptStore', {
         }
       } else {
         this.dataset = deepClone(baseline!);
+        this.promptText = '1girl, solo, long hair, blue eyes, smile, looking_at_viewer, upper_body, outdoors, sunset';
       }
       // 若无恢复语言，则按数据集进行推断
       if (!this.selectedLang) {