feat: 在 App.vue 和 ParticleBackground 组件中优化动画控制和性能，添加页面可见性处理，确保动画在页面隐藏时暂停，提升用户体验和资源利用效率。

src/App.vue

@@ -77,37 +77,37 @@ import WechatModal from './components/WechatModal.vue'
 
 const showWechatModal = ref(false)
 
-// 优化动画性能
+// 优化动画控制
+const handleVisibilityChange = () => {
+  const elements = document.querySelectorAll('.floating-element, .floating-bubble, .floating-flower, .floating-cloud')
+  const isHidden = document.hidden
+  
+  elements.forEach(el => {
+    if (isHidden) {
+      el.classList.add('animation-paused')
+    } else {
+      el.classList.remove('animation-paused')
+    }
+  })
+}
+
+// 优化初始化
 onMounted(() => {
   const elements = document.querySelectorAll('.floating-element, .floating-bubble, .floating-flower, .floating-cloud')
   elements.forEach(el => {
     el.style.left = `${Math.random() * 100}vw`
     el.style.top = `${Math.random() * 100}vh`
-    // 添加硬件加速
     el.style.transform = 'translateZ(0)'
     el.style.willChange = 'transform'
+    el.style.animationPlayState = 'running'
   })
-})
-
-// 添加页面可见性检测
-onMounted(() => {
+  
   document.addEventListener('visibilitychange', handleVisibilityChange)
 })
 
 onUnmounted(() => {
   document.removeEventListener('visibilitychange', handleVisibilityChange)
 })
-
-const handleVisibilityChange = () => {
-  const elements = document.querySelectorAll('.floating-element, .floating-bubble, .floating-flower, .floating-cloud')
-  elements.forEach(el => {
-    if (document.hidden) {
-      el.style.animationPlayState = 'paused'
-    } else {
-      el.style.animationPlayState = 'running'
-    }
-  })
-}
 </script>
 
 <style scoped>
@@ -166,17 +166,14 @@ const handleVisibilityChange = () => {
 }
 
 @keyframes bubble {
-  0%, 100% {
-    transform: translate(
-      calc(random(100) * 1vw),
-      calc(100vh + 50px)
-    );
+  0% {
+    transform: translate(0, 100vh);
   }
   50% {
-    transform: translate(
-      calc(random(100) * 1vw),
-      -50px
-    );
+    transform: translate(calc(100vw * 0.5), -50px);
+  }
+  100% {
+    transform: translate(100vw, 100vh);
   }
 }
 
@@ -285,26 +282,23 @@ const handleVisibilityChange = () => {
 
 /* 动画关键帧 */
 @keyframes floatFlower {
-  0%, 100% {
-    transform: translate(
-      calc(random(100) * 1vw),
-      -50px
-    ) rotate(0deg);
+  0% {
+    transform: translate(0, -50px) rotate(0deg);
   }
   50% {
-    transform: translate(
-      calc(random(100) * 1vw),
-      calc(100vh + 50px)
-    ) rotate(360deg);
+    transform: translate(calc(100vw * 0.5), calc(100vh + 50px)) rotate(360deg);
+  }
+  100% {
+    transform: translate(100vw, -50px) rotate(720deg);
   }
 }
 
 @keyframes floatCloud {
-  from {
-    transform: translateX(-150px) translateY(calc(random(50) * 1vh));
+  0% {
+    transform: translateX(-150px) translateY(0);
   }
-  to {
-    transform: translateX(calc(100vw + 150px)) translateY(calc(random(50) * 1vh));
+  100% {
+    transform: translateX(calc(100vw + 150px)) translateY(0);
   }
 }
 
@@ -430,11 +424,12 @@ const handleVisibilityChange = () => {
   .floating-bubble,
   .floating-flower,
   .floating-cloud {
-    display: none;
+    animation-duration: 15s;
+    animation-timing-function: linear;
   }
   
   .rainbow-glow {
-    opacity: 0.05;
+    animation-duration: 20s;
   }
 }
 
@@ -446,15 +441,16 @@ const handleVisibilityChange = () => {
   transform: translateZ(0);
   backface-visibility: hidden;
   perspective: 1000px;
+  animation-play-state: running;
 }
 
-/* 优化动画性能 */
+/* 添加动画性能优化 */
 @media (prefers-reduced-motion: no-preference) {
   .floating-element,
   .floating-bubble,
   .floating-flower,
   .floating-cloud {
-    animation-play-state: running;
+    animation-play-state: running !important;
   }
 }
 

src/components/ParticleBackground.vue

@@ -33,6 +33,8 @@ const config = {
 let scene, camera, renderer, particles, lines, mouse = { x: 0, y: 0 }
 
 const initThreeJS = () => {
+  if (!canvasRef.value) return
+  
   // 1. 初始化场景
   scene = new THREE.Scene()
   scene.background = new THREE.Color(0x000000)
@@ -51,7 +53,8 @@ const initThreeJS = () => {
   renderer = new THREE.WebGLRenderer({
     canvas: canvasRef.value,
     antialias: true,
-    alpha: true
+    alpha: true,
+    powerPreference: 'high-performance'
   })
   renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2))
   renderer.setSize(window.innerWidth, window.innerHeight)
@@ -59,7 +62,7 @@ const initThreeJS = () => {
   // 4. 创建粒子系统
   createParticles()
   
-  // 5. 动画循环
+  // 5. 启动动画循环
   animate()
 }
 
@@ -202,20 +205,27 @@ const animate = () => {
     // 更新粒子位置
     updateParticles(time)
     
-    renderer.render(scene, camera)
+    // 确保渲染器存在且场景已初始化
+    if (renderer && scene) {
+      renderer.render(scene, camera)
+    }
   }
 }
 
 const updateParticles = (time) => {
+  if (!particles || !particles.geometry) return
+  
   const positions = particles.geometry.attributes.position.array
   
   for (let i = 0; i < config.particleCount; i++) {
     const i3 = i * 3
     
+    // 优化粒子运动
     positions[i3] += Math.sin(time + i * 0.05) * 0.01
     positions[i3 + 1] += Math.cos(time + i * 0.03) * 0.01
     positions[i3 + 2] += Math.sin(time * 0.3 + i * 0.04) * 0.01
     
+    // 鼠标交互
     if (mouse.x !== null && mouse.y !== null) {
       const dx = positions[i3] - mouse.x * 20
       const dy = positions[i3 + 1] - mouse.y * 20
@@ -258,16 +268,34 @@ const addPostProcessing = () => {
   composer.addPass(bloomPass)
 }
 
+// 添加页面可见性处理
+const handleVisibilityChange = () => {
+  if (document.hidden) {
+    if (renderer) {
+      renderer.setAnimationLoop(null)
+    }
+  } else {
+    if (renderer) {
+      renderer.setAnimationLoop(animate)
+    }
+  }
+}
+
 onMounted(() => {
   initThreeJS()
   window.addEventListener('resize', handleResize)
   window.addEventListener('mousemove', handleMouseMove)
+  window.addEventListener('visibilitychange', handleVisibilityChange)
 })
 
 onUnmounted(() => {
   window.removeEventListener('resize', handleResize)
   window.removeEventListener('mousemove', handleMouseMove)
-  if (renderer) renderer.dispose()
+  window.removeEventListener('visibilitychange', handleVisibilityChange)
+  if (renderer) {
+    renderer.dispose()
+    renderer = null
+  }
 })
 </script>