diff --git a/furniture-3d-system/src/lib/open-product/platform-api.ts b/furniture-3d-system/src/lib/open-product/platform-api.ts
index dbcf4753..9eab9506 100644
--- a/furniture-3d-system/src/lib/open-product/platform-api.ts
+++ b/furniture-3d-system/src/lib/open-product/platform-api.ts
@@ -269,6 +269,117 @@ export async function uploadMaterialThumbnail(file: File, category?: string): Pr
   })
 }
 
+const MATERIAL_UPLOAD_CLIENT_TARGET_BYTES = 900 * 1024
+const MATERIAL_UPLOAD_TEXTURE_MAX_DIMENSION = 2048
+const MATERIAL_UPLOAD_THUMBNAIL_MAX_DIMENSION = 768
+
+function isClientCompressibleImage(file: File): boolean {
+  const type = file.type.toLowerCase()
+  const name = file.name.toLowerCase()
+  return (
+    type === 'image/jpeg' ||
+    type === 'image/png' ||
+    type === 'image/webp' ||
+    /\.(jpe?g|png|webp)$/.test(name)
+  )
+}
+
+function materialUploadFileName(fileName: string): string {
+  const baseName = fileName.replace(/\.[^.]+$/, '').trim() || 'material-texture'
+  return `${baseName}.webp`
+}
+
+async function loadImageElement(file: File): Promise<HTMLImageElement> {
+  const imageUrl = URL.createObjectURL(file)
+  try {
+    return await new Promise<HTMLImageElement>((resolve, reject) => {
+      const image = new Image()
+      image.onload = () => resolve(image)
+      image.onerror = () => reject(new Error('图片读取失败，请换用 JPG、PNG 或 WebP 图片'))
+      image.src = imageUrl
+    })
+  } finally {
+    URL.revokeObjectURL(imageUrl)
+  }
+}
+
+async function canvasToWebpBlob(canvas: HTMLCanvasElement, quality: number): Promise<Blob | null> {
+  return new Promise((resolve) => {
+    canvas.toBlob((blob) => resolve(blob), 'image/webp', quality)
+  })
+}
+
+async function compressMaterialImageForUpload(
+  file: File,
+  uploadType: 'thumbnail' | 'texture' | 'normal',
+): Promise<File> {
+  if (
+    file.size <= MATERIAL_UPLOAD_CLIENT_TARGET_BYTES ||
+    typeof window === 'undefined' ||
+    typeof document === 'undefined' ||
+    typeof Image === 'undefined' ||
+    !isClientCompressibleImage(file)
+  ) {
+    return file
+  }
+
+  const image = await loadImageElement(file)
+  const sourceWidth = image.naturalWidth || image.width
+  const sourceHeight = image.naturalHeight || image.height
+  if (sourceWidth <= 0 || sourceHeight <= 0) {
+    throw new Error('图片尺寸读取失败，请换用 JPG、PNG 或 WebP 图片')
+  }
+
+  const maxDimension =
+    uploadType === 'thumbnail'
+      ? MATERIAL_UPLOAD_THUMBNAIL_MAX_DIMENSION
+      : MATERIAL_UPLOAD_TEXTURE_MAX_DIMENSION
+  const dimensionSteps =
+    uploadType === 'thumbnail'
+      ? [maxDimension, 640, 512, 384]
+      : [maxDimension, 1800, 1600, 1400, 1280, 1024, 768, 640]
+  const qualitySteps = [0.92, 0.86, 0.8, 0.72, 0.64, 0.56, 0.5, 0.42, 0.36]
+
+  const canvas = document.createElement('canvas')
+  const context = canvas.getContext('2d')
+  if (!context) {
+    return file
+  }
+
+  let smallestBlob: Blob | null = null
+
+  for (const dimension of dimensionSteps) {
+    const scale = Math.min(1, dimension / Math.max(sourceWidth, sourceHeight))
+    canvas.width = Math.max(1, Math.round(sourceWidth * scale))
+    canvas.height = Math.max(1, Math.round(sourceHeight * scale))
+    context.clearRect(0, 0, canvas.width, canvas.height)
+    context.drawImage(image, 0, 0, canvas.width, canvas.height)
+
+    for (const quality of qualitySteps) {
+      const blob = await canvasToWebpBlob(canvas, quality)
+      if (!blob) continue
+      if (!smallestBlob || blob.size < smallestBlob.size) {
+        smallestBlob = blob
+      }
+      if (blob.size <= MATERIAL_UPLOAD_CLIENT_TARGET_BYTES) {
+        return new File([blob], materialUploadFileName(file.name), {
+          type: 'image/webp',
+          lastModified: file.lastModified,
+        })
+      }
+    }
+  }
+
+  if (smallestBlob && smallestBlob.size < file.size && smallestBlob.size <= 1024 * 1024) {
+    return new File([smallestBlob], materialUploadFileName(file.name), {
+      type: 'image/webp',
+      lastModified: file.lastModified,
+    })
+  }
+
+  throw new Error('图片压缩后仍超过当前上传入口限制，请换用更小图片或先调大正式站上传限制')
+}
+
 export async function uploadMaterialAsset(
   file: File,
   options?: {
@@ -276,9 +387,11 @@ export async function uploadMaterialAsset(
     category?: string
   },
 ): Promise<string> {
+  const uploadType = options?.type ?? 'texture'
+  const uploadFile = await compressMaterialImageForUpload(file, uploadType)
   const formData = new FormData()
-  formData.append('file', file)
-  formData.append('type', options?.type ?? 'texture')
+  formData.append('file', uploadFile)
+  formData.append('type', uploadType)
   if (options?.category) {
     formData.append('category', options.category)
   }
@@ -290,6 +403,9 @@ export async function uploadMaterialAsset(
 
   const payload = (await response.json().catch(() => null)) as ApiEnvelope<{ url: string }> | null
   if (!response.ok || !payload?.success || payload.data === undefined) {
+    if (response.status === 413) {
+      throw new Error('图片超过当前站点上传入口限制，系统已尝试本地压缩；请换用更小图片或先调大正式站上传限制')
+    }
     throw new Error(payload?.error?.message || '图片上传失败')
   }
 
diff --git a/furniture-3d-system/src/server/services/__tests__/material.service.test.ts b/furniture-3d-system/src/server/services/__tests__/material.service.test.ts
index 7c09c96d..85e3fc5f 100644
--- a/furniture-3d-system/src/server/services/__tests__/material.service.test.ts
+++ b/furniture-3d-system/src/server/services/__tests__/material.service.test.ts
@@ -18,6 +18,7 @@ jest.mock('@/server/repositories/material.repository', () => ({
     getNextSortOrder: jest.fn(),
     create: jest.fn(),
     update: jest.fn(),
+    deactivate: jest.fn(),
     delete: jest.fn(),
   },
 }))
@@ -63,6 +64,7 @@ const mockMaterialCategoryRepository = materialCategoryRepository as unknown as
   getNextSortOrder: jest.Mock
   create: jest.Mock
   update: jest.Mock
+  deactivate: jest.Mock
   delete: jest.Mock
 }
 
@@ -244,11 +246,27 @@ describe('materialService', () => {
     expect(mockMaterialRepository.deactivate).not.toHaveBeenCalled()
   })
 
-  it('删除分类时会硬删除未引用的分类', async () => {
+  it('删除分类时只按启用材质拦截并停用分类', async () => {
     await materialService.deleteCategory('category-wood')
 
-    expect(mockMaterialCategoryRepository.getMaterialCount).toHaveBeenCalledWith('category-wood', false)
-    expect(mockMaterialCategoryRepository.delete).toHaveBeenCalledWith('category-wood')
+    expect(mockMaterialCategoryRepository.getMaterialCount).toHaveBeenCalledWith('category-wood', true)
+    expect(mockMaterialCategoryRepository.deactivate).toHaveBeenCalledWith('category-wood')
+    expect(mockMaterialCategoryRepository.delete).not.toHaveBeenCalled()
+  })
+
+  it('彻底删除分类时会继续拦截历史隐藏材质', async () => {
+    mockMaterialCategoryRepository.getMaterialCount
+      .mockResolvedValueOnce(0)
+      .mockResolvedValueOnce(1)
+
+    await expect(materialService.deleteCategory('category-wood', true)).rejects.toThrow(
+      '该分类下还有 1 个历史材质，无法彻底删除',
+    )
+
+    expect(mockMaterialCategoryRepository.getMaterialCount).toHaveBeenNthCalledWith(1, 'category-wood', true)
+    expect(mockMaterialCategoryRepository.getMaterialCount).toHaveBeenNthCalledWith(2, 'category-wood', false)
+    expect(mockMaterialCategoryRepository.delete).not.toHaveBeenCalled()
+    expect(mockMaterialCategoryRepository.deactivate).not.toHaveBeenCalled()
   })
 
   it('创建分类时会归一化名称图标并拒绝负排序', async () => {
diff --git a/furniture-3d-system/src/server/services/material.service.ts b/furniture-3d-system/src/server/services/material.service.ts
index ee6826a0..0f601d86 100644
--- a/furniture-3d-system/src/server/services/material.service.ts
+++ b/furniture-3d-system/src/server/services/material.service.ts
@@ -583,7 +583,7 @@ class MaterialService {
   }
 
   /**
-   * 删除分类（软删除）
+   * 删除分类：普通删除只校验启用材质，并停用分类以保留历史材质关联。
    */
   async deleteCategory(id: string, hardDelete: boolean = false): Promise<void> {
     // 检查分类是否存在
@@ -592,22 +592,29 @@ class MaterialService {
       throw new AppError(ErrorCode.FILE_NOT_FOUND, '材质分类不存在')
     }
 
-    // 检查分类下是否有材质
-    const materialCount = await materialCategoryRepository.getMaterialCount(id, false)
+    // 左侧分类数字只展示启用材质；删除校验也应按同一口径处理。
+    const activeMaterialCount = await materialCategoryRepository.getMaterialCount(id, true)
 
-    if (materialCount > 0) {
+    if (activeMaterialCount > 0) {
       throw new AppError(
         ErrorCode.VALIDATION_FAILED,
-        `该分类下还有 ${materialCount} 个材质，无法删除`
+        `该分类下还有 ${activeMaterialCount} 个材质，无法删除`
       )
     }
 
     if (hardDelete) {
+      const materialCount = await materialCategoryRepository.getMaterialCount(id, false)
+      if (materialCount > 0) {
+        throw new AppError(
+          ErrorCode.VALIDATION_FAILED,
+          `该分类下还有 ${materialCount} 个历史材质，无法彻底删除`
+        )
+      }
       await materialCategoryRepository.delete(id)
       return
     }
 
-    await materialCategoryRepository.delete(id)
+    await materialCategoryRepository.deactivate(id)
   }
 
   /**