diff --git a/src/components/CadModelViewer.vue b/src/components/CadModelViewer.vue
index 7282e4c..652c579 100644
--- a/src/components/CadModelViewer.vue
+++ b/src/components/CadModelViewer.vue
@@ -1,129 +1,228 @@
 <template>
-  <div class="cad-model-viewer">
-    <div ref="containerRef" class="cad-model-viewer__canvas" />
-    <div v-if="loading" class="cad-model-viewer__overlay">
+  <div class="model-preview" :style="{ width: width, height: height }">
+    <div v-if="loading" class="loading-mask">
       <n-spin size="large" />
-      <span>模型加载中…</span>
+      <p class="loading-text">模型加载中...</p>
     </div>
-    <div v-else-if="error" class="cad-model-viewer__overlay cad-model-viewer__overlay--error">
-      <n-empty :description="error" />
-    </div>
-    <div v-if="!loading && !error" class="cad-model-viewer__toolbar">
+    <div   ref="canvasRef" class="canvas-container"></div>
+
+    <div  class="cad-model-viewer__toolbar">
       <n-button size="tiny" quaternary @click="resetView">复位</n-button>
     </div>
   </div>
 </template>
 
-<script setup lang="ts">
-import { ref, watch, onMounted, onBeforeUnmount } from 'vue'
-import { NButton, NSpin, NEmpty } from 'naive-ui'
+<script setup>
+import { ref, onMounted, onUnmounted, watch } from 'vue'
 import * as THREE from 'three'
-import { OrbitControls } from 'three/examples/jsm/controls/OrbitControls.js'
-import { createGLTFLoader, disposeDracoLoader } from '@/utils/gltfLoader'
-import { useUserStore } from '@/stores/user'
+import { STLLoader } from 'three/addons/loaders/STLLoader.js'
+import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js'
+import { DRACOLoader } from 'three/addons/loaders/DRACOLoader.js'
+import { OrbitControls } from 'three/addons/controls/OrbitControls.js'
 
-const props = defineProps<{
-  /** 远程 glb/gltf 地址（需登录时可带 Token） */
-  url?: string
-  /** 本地文件（与 url 二选一，file 优先） */
-  file?: File | null
-}>()
+const props = defineProps({
+  modelUrl: {
+    type: String,
+  },
+  width: {
+    type: String,
+    default: '100%'
+  },
+  height: {
+    type: String,
+    default: '600px'
+  }
+})
 
-const containerRef = ref<HTMLDivElement | null>(null)
-const loading = ref(false)
+const emit = defineEmits(['load-success', 'load-error'])
+
+const canvasRef = ref(null)
+const loading = ref(true)
 const error = ref('')
 
-let renderer: THREE.WebGLRenderer | null = null
-let scene: THREE.Scene | null = null
-let camera: THREE.PerspectiveCamera | null = null
-let controls: OrbitControls | null = null
-let animationId = 0
-let modelRoot: THREE.Object3D | null = null
-let defaultCameraPosition = new THREE.Vector3(2, 2, 2)
-let defaultTarget = new THREE.Vector3(0, 0, 0)
-let disposed = false
-let objectUrls: string[] = []
 
-function resolveUrl(url: string) {
-  if (url.startsWith('http://') || url.startsWith('https://')) return url
-  if (url.startsWith('/')) return `${window.location.origin}${url}`
-  return url
+let scene, camera, renderer, controls
+let animationId = null
+let currentModel = null
+let dracoLoader
+let gltfLoader
+let defaultCameraPosition = new THREE.Vector3(0,0,9)
+let defaultTarget = new THREE.Vector3(0,0,0)
+
+
+function resolveUrl(modelUrl) {
+  if (modelUrl.startsWith('http://') || url.startsWith('https://')) return modelUrl
+  if (modelUrl.startsWith('/')) return `${window.location.origin}${modelUrl}`
+  return modelUrl
 }
 
-async function fetchModelArrayBuffer(url: string): Promise<ArrayBuffer> {
-  const userStore = useUserStore()
-  const headers: Record<string, string> = {}
-  if (userStore.token) headers.Authorization = userStore.token
-
-  const res = await fetch(resolveUrl(url), { headers })
-  if (!res.ok) throw new Error(`模型加载失败 (${res.status})`)
-  return res.arrayBuffer()
-}
-
-function initScene() {
-  const container = containerRef.value
+const initScene = () => {
+  const container = canvasRef.value
   if (!container) return
 
-  const width = container.clientWidth || 640
-  const height = container.clientHeight || 480
+  const w = container.clientWidth
+  const h = container.clientHeight
 
-  scene = new THREE.Scene()
-  scene.background = new THREE.Color(0xf0f2f5)
+  scene = new THREE.Scene() //舞台
+  scene.background = new THREE.Color('#FFFFFF') //背景色
 
-  camera = new THREE.PerspectiveCamera(45, width / height, 0.01, 10000)
-  camera.position.copy(defaultCameraPosition)
+  //相机
+  //决定从哪个角度观察3D世界，常用两种:
+  // 1.PerspectiveCamera 透视相机(人眼视觉 近大远小)
+  // 2.OrthographicCamera 正交相机(人眼视觉 大大缩放)
 
-  renderer = new THREE.WebGLRenderer({ antialias: true, alpha: true })
-  renderer.setPixelRatio(Math.min(window.devicePixelRatio, 2))
-  renderer.setSize(width, height)
-  renderer.outputColorSpace = THREE.SRGBColorSpace
-  container.innerHTML = ''
+  camera = new THREE.PerspectiveCamera(45, w / h, 0.1, 10000)
+  // camera = new THREE.OrthographicCamera(45, w / h, 0.1, 10000)
+  camera.position.set(0, 0, 200)
+
+  // 大模型性能降级：关闭抗锯齿、限制像素比、关闭阴影
+  // Renderer 渲染器
+  // 连接场景+相机 输出画面到Canvas画布 调用显卡渲染
+  // WebGLRenderer 硬件加速
+  // WebGPURenderer 新一代高性能渲染
+  renderer = new THREE.WebGLRenderer({
+    antialias: false,
+    preserveDrawingBuffer: true,
+    powerPreference:"low-power" //适应手机端 开启兼容低性能WebGL
+  })
+  renderer.setSize(w, h)
+  renderer.setPixelRatio(1) //手机强制1倍像素，避免高DPI爆现存卡顿
+  // renderer.setPixelRatio(Math.min(window.devicePixelRatio, 1))
+  renderer.shadowMap.enabled = false
   container.appendChild(renderer.domElement)
 
-  controls = new OrbitControls(camera, renderer.domElement)
-  controls.enableDamping = true
-  controls.dampingFactor = 0.08
-  controls.target.copy(defaultTarget)
-
-  const ambient = new THREE.AmbientLight(0xffffff, 0.75)
-  const dir1 = new THREE.DirectionalLight(0xffffff, 1.1)
-  dir1.position.set(5, 8, 6)
-  const dir2 = new THREE.DirectionalLight(0xffffff, 0.45)
-  dir2.position.set(-4, -2, -5)
-  scene.add(ambient, dir1, dir2)
+  // 光照
+  const ambientLight = new THREE.AmbientLight(0xffffff, 2.50)//环境光 均匀漫射 无阴影
+  scene.add(ambientLight)
+  const mainLight = new THREE.DirectionalLight(0xffffff, 1.00)//平行光 太阳光，支持阴影
+  mainLight.position.set(200, 300, 200)
+  scene.add(mainLight)
+  const fillLight = new THREE.DirectionalLight(0xffffff, 0.35)
+  fillLight.position.set(-200, -100, -200)
+  scene.add(fillLight)
 
   const grid = new THREE.GridHelper(10, 20, 0xcccccc, 0xe8e8e8)
   scene.add(grid)
 
-  animate()
+
+  controls = new OrbitControls(camera, renderer.domElement)
+  controls.enableDamping = true
+  controls.dampingFactor = 0.05
+  controls.enablePan = true
+  controls.minDistance = 1
+  controls.maxDistance = 10000
+
+  // 初始化Draco解码器绑定GLTFLoader
+  dracoLoader = new DRACOLoader()
+  dracoLoader.setDecoderPath('https://unpkg.com/three@0.160.0/examples/jsm/libs/draco/')
+  dracoLoader.setDecoderConfig({ type: 'js' })
+  gltfLoader = new GLTFLoader()
+  gltfLoader.setDRACOLoader(dracoLoader)
+  loadModel()
 }
 
-function animate() {
-  animationId = requestAnimationFrame(animate)
-  controls?.update()
-  if (renderer && scene && camera) renderer.render(scene, camera)
+const clearOldModel = () => {
+  if (!scene) return
+  if (currentModel) {
+    scene.remove(currentModel)
+    currentModel.traverse((child) => {
+      if (child.geometry) child.geometry.dispose()
+      if (child.material) {
+        if (Array.isArray(child.material)) child.material.forEach(m => m.dispose())
+        else child.material.dispose()
+      }
+    })
+    currentModel = null
+  }
 }
 
-function frameModel(object: THREE.Object3D) {
-  if (!camera || !controls) return
-  const box = new THREE.Box3().setFromObject(object)
-  if (box.isEmpty()) return
-
-  const size = box.getSize(new THREE.Vector3())
+const fitModelToView = (model) => {
+  const box = new THREE.Box3().setFromObject(model)
   const center = box.getCenter(new THREE.Vector3())
-  const maxDim = Math.max(size.x, size.y, size.z, 0.001)
-  const dist = maxDim * 1.8 / Math.tan((camera.fov * Math.PI) / 360)
-
-  defaultTarget.copy(center)
-  defaultCameraPosition.set(center.x + dist * 0.6, center.y + dist * 0.5, center.z + dist * 0.8)
-  camera.position.copy(defaultCameraPosition)
-  camera.near = maxDim / 100
-  camera.far = maxDim * 100
+  const size = box.getSize(new THREE.Vector3())
+  model.position.sub(center)
+  const maxDim = Math.max(size.x, size.y, size.z)
+  const fov = camera.fov * (Math.PI / 180)
+  const cameraZ = Math.abs(maxDim / 2 / Math.tan(fov / 2)) * 2.2
+  camera.position.set(0, 0, cameraZ)
+  camera.lookAt(0, 0, 0)
   camera.updateProjectionMatrix()
-  controls.target.copy(center)
+  controls.target.set(0, 0, 0)
   controls.update()
 }
 
+const loadModel = () => {
+
+  if (!props.modelUrl || !gltfLoader) return
+
+  loading.value = true
+  clearOldModel()
+  const url = props.modelUrl
+  const ext = url.split('.').pop().toLowerCase()
+
+  if (ext === 'stl') {
+    const loader = new STLLoader()
+
+    loader.load(
+        url,
+        (geometry) => {
+          loading.value = false
+          geometry.computeVertexNormals()
+          geometry.center()
+          const material = new THREE.MeshStandardMaterial({
+            color: 0xb8bcc2, metalness: 0.25, roughness: 0.75, side: THREE.DoubleSide
+          })
+          const mesh = new THREE.Mesh(geometry, material)
+          currentModel = mesh
+          scene.add(mesh)
+          fitModelToView(mesh)
+          emit('load-success', mesh)
+        },
+        (xhr) => console.log(`STL加载 ${(xhr.loaded/xhr.total*100).toFixed(1)}%`),
+        (err) => { loading.value = false; console.error('STL错误', err); emit('load-error', err) }
+    )
+  } else if (ext === 'glb' || ext === 'gltf') {
+    gltfLoader.load(
+        url,
+        (gltf) => {
+          console.log('✅ 成功进入解析回调，开始处理模型')
+          loading.value = false
+          const model = gltf.scene
+          currentModel = model
+          fitModelToView(model)
+          scene.add(model)
+          emit('load-success', model)
+        },
+        // 打印下载进度，判断是否下载卡住
+        (xhr) => console.log(`GLB下载进度 ${(xhr.loaded/xhr.total*100).toFixed(1)}%`),
+        (err) => {
+          loading.value = false
+          console.error('GLB加载失败完整报错：', err)
+          emit('load-error', err)
+        }
+    )
+  } else {
+    loading.value = false
+    emit('load-error', new Error('仅支持 stl / glb / gltf'))
+  }
+}
+
+const animate = () => {
+  animationId = requestAnimationFrame(animate)
+  controls?.update()
+  renderer?.render(scene, camera)
+}
+
+const onWindowResize = () => {
+  if (!camera || !renderer || !canvasRef.value) return
+  const w = canvasRef.value.clientWidth
+  const h = canvasRef.value.clientHeight
+  camera.aspect = w / h
+  camera.updateProjectionMatrix()
+  renderer.setSize(w, h)
+}
+
+
 function resetView() {
   if (!camera || !controls) return
   camera.position.copy(defaultCameraPosition)
@@ -131,178 +230,59 @@ function resetView() {
   controls.update()
 }
 
-function clearModel() {
-  if (modelRoot && scene) {
-    scene.remove(modelRoot)
-    modelRoot.traverse((child) => {
-      const mesh = child as THREE.Mesh
-      if (mesh.geometry) mesh.geometry.dispose()
-      if (mesh.material) {
-        const mats = Array.isArray(mesh.material) ? mesh.material : [mesh.material]
-        mats.forEach(m => m.dispose())
-      }
-    })
-    modelRoot = null
-  }
-  objectUrls.forEach(u => URL.revokeObjectURL(u))
-  objectUrls = []
-}
 
-function disposeViewer() {
-  disposed = true
-  cancelAnimationFrame(animationId)
-  clearModel()
-  controls?.dispose()
-  renderer?.dispose()
-  controls = null
-  renderer = null
-  scene = null
-  camera = null
-  disposeDracoLoader()
-}
-
-async function loadFromFile(file: File) {
-  if (disposed) return
-  loading.value = true
-  error.value = ''
-  clearModel()
-
-  const ext = file.name.split('.').pop()?.toLowerCase() ?? ''
-  if (ext !== 'glb' && ext !== 'gltf') {
-    error.value = '仅支持 .glb / .gltf 文件'
-    loading.value = false
-    return
-  }
-
-  try {
-    if (!scene) initScene()
-    const loader = createGLTFLoader()
-
-    if (ext === 'glb') {
-      const buffer = await file.arrayBuffer()
-      const gltf = await new Promise<{ scene: THREE.Object3D }>((resolve, reject) => {
-        loader.parse(buffer, '', resolve, reject)
-      })
-      modelRoot = gltf.scene
-    } else {
-      const objectUrl = URL.createObjectURL(file)
-      objectUrls.push(objectUrl)
-      const gltf = await new Promise<{ scene: THREE.Object3D }>((resolve, reject) => {
-        loader.load(objectUrl, (g) => resolve(g), undefined, reject)
-      })
-      modelRoot = gltf.scene
-    }
-
-    scene!.add(modelRoot!)
-    frameModel(modelRoot!)
-  } catch (e) {
-    error.value = ext === 'gltf'
-      ? 'gltf 加载失败；若含外部 .bin 请改用单文件 .glb'
-      : (e instanceof Error ? e.message : '模型加载失败')
-  } finally {
-    loading.value = false
-  }
-}
-
-async function loadModel(url: string) {
-  if (!url || disposed) return
-  loading.value = true
-  error.value = ''
-  clearModel()
-
-  try {
-    if (!scene) initScene()
-    const buffer = await fetchModelArrayBuffer(url)
-    const loader = createGLTFLoader()
-    const gltf = await new Promise<{ scene: THREE.Object3D }>((resolve, reject) => {
-      loader.parse(buffer, '', resolve, reject)
-    })
-    modelRoot = gltf.scene
-    scene!.add(modelRoot)
-    frameModel(modelRoot)
-  } catch (e) {
-    error.value = e instanceof Error ? e.message : '模型加载失败'
-  } finally {
-    loading.value = false
-  }
-}
-
-function onResize() {
-  const container = containerRef.value
-  if (!container || !renderer || !camera) return
-  const width = container.clientWidth
-  const height = container.clientHeight
-  if (!width || !height) return
-  camera.aspect = width / height
-  camera.updateProjectionMatrix()
-  renderer.setSize(width, height)
-}
-
-watch(
-  () => [props.file, props.url] as const,
-  ([file, url]) => {
-    if (file) {
-      loadFromFile(file)
-    } else if (url) {
-      loadModel(url)
-    }
-  },
-  { immediate: true },
-)
+watch(() => props.modelUrl, (newVal) => newVal && loadModel(), { immediate: true })
 
 onMounted(() => {
-  window.addEventListener('resize', onResize)
+  initScene()
+  animate()
+  window.addEventListener('resize', onWindowResize)
 })
 
-onBeforeUnmount(() => {
-  window.removeEventListener('resize', onResize)
-  disposeViewer()
+onUnmounted(() => {
+  if (dracoLoader) dracoLoader.dispose()
+  cancelAnimationFrame(animationId)
+  window.removeEventListener('resize', onWindowResize)
+  clearOldModel()
+  renderer?.dispose()
+  scene = camera = renderer = controls = dracoLoader = gltfLoader = null
 })
 </script>
 
 <style scoped>
-.cad-model-viewer {
+.model-preview {
   position: relative;
-  width: 100%;
-  height: 100%;
-  min-height: 420px;
-  background: #f0f2f5;
-  border-radius: 8px;
+  border: 1px solid #e5e7eb;
+  border-radius: 4px;
   overflow: hidden;
+  background: #f0f2f5;
 }
-
-.cad-model-viewer__canvas {
+.canvas-container {
   width: 100%;
   height: 100%;
-  min-height: 420px;
 }
-
-.cad-model-viewer__canvas :deep(canvas) {
-  display: block;
-  width: 100% !important;
-  height: 100% !important;
-}
-
-.cad-model-viewer__overlay {
+.loading-mask {
   position: absolute;
-  inset: 0;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+  background: rgba(255,255,255,0.85);
   display: flex;
   flex-direction: column;
   align-items: center;
   justify-content: center;
-  gap: 12px;
-  background: rgba(255, 255, 255, 0.85);
-  z-index: 2;
+  z-index: 10;
 }
-
-.cad-model-viewer__overlay--error {
-  background: rgba(255, 255, 255, 0.92);
+.loading-text {
+  margin-top: 12px;
+  color: #666;
+  font-size: 14px;
 }
-
 .cad-model-viewer__toolbar {
   position: absolute;
   top: 8px;
   right: 8px;
   z-index: 3;
 }
-</style>
+</style>
\ No newline at end of file
diff --git a/src/components/PlmModelDrawer.vue b/src/components/PlmModelDrawer.vue
index 83b1bfe..851c96e 100644
--- a/src/components/PlmModelDrawer.vue
+++ b/src/components/PlmModelDrawer.vue
@@ -14,7 +14,7 @@
           <n-text depth="3">首次查看可能需要 30 秒～数分钟</n-text>
         </div>
 
-        <CadModelViewer v-else-if="previewUrl" :url="previewUrl" class="plm-model-drawer__viewer" />
+        <CadModelViewer v-else-if="previewUrl" :modelUrl="previewUrl" class="plm-model-drawer__viewer" />
 
         <n-result
           v-else-if="error"
@@ -70,8 +70,9 @@ function sleep(ms: number) {
 
 async function fetchPreview(query: PlmModelPreviewQuery): Promise<PlmModelPreviewResult> {
   const maxAttempts = 90
-  for (let i = 0; i < maxAttempts; i++) {
+  for (let i = 0; i < maxAttempts; i++) {    
     const res = await plmModelApi.getPreview(query)
+
     if (res.status === 'ready' || res.status === 'failed' || res.status === 'not_found') {
       return res
     }
@@ -86,7 +87,7 @@ async function open(ctx: PlmModelOpenContext) {
   resultMeta.value = null
   previewUrl.value = ''
   error.value = ''
-  converting.value = false
+  converting.value = true
   loading.value = true
   visible.value = true
 
@@ -98,8 +99,10 @@ async function open(ctx: PlmModelOpenContext) {
       processPlanId: ctx.processPlanId,
       dispatchId: ctx.dispatchId,
     })
+    
     resultMeta.value = res
-
+    
+    
     if (res.status === 'ready' && res.previewUrl) {
       previewUrl.value = res.previewUrl
     } else {