diff --git a/entry/src/main/ets/pages/BridgeGameContainer.ets b/entry/src/main/ets/pages/BridgeGameContainer.ets
index 53d4049..7cddd5d 100644
--- a/entry/src/main/ets/pages/BridgeGameContainer.ets
+++ b/entry/src/main/ets/pages/BridgeGameContainer.ets
@@ -347,6 +347,7 @@ export struct BridgeGameContainer {
       Stack() {
         // 大厅 Web（常驻）
         Web({ src: this.lobbySrc(), controller: this.controllerL })
+          .id('web_lobby')
           .javaScriptAccess(true).domStorageAccess(true).fileAccess(true)
           .mixedMode(MixedMode.All).cacheMode(CacheMode.None)
           .geolocationAccess(true).zoomAccess(false)
@@ -372,6 +373,7 @@ export struct BridgeGameContainer {
         // 子游戏 Web（临时，subgameUrl 非空时存在）
         if (this.subgameUrl !== '' && this.slotS !== undefined) {
           Web({ src: this.subgameUrl, controller: this.slotS.controller })
+            .id('web_subgame')
             .javaScriptAccess(true).domStorageAccess(true).fileAccess(true)
             .mixedMode(MixedMode.All).cacheMode(CacheMode.None)
             .geolocationAccess(true).zoomAccess(false)
diff --git a/entry/src/main/ets/web/WebSlot.ets b/entry/src/main/ets/web/WebSlot.ets
index 15256ce..ccbe0e5 100644
--- a/entry/src/main/ets/web/WebSlot.ets
+++ b/entry/src/main/ets/web/WebSlot.ets
@@ -1,4 +1,7 @@
 import { webview } from '@kit.ArkWeb';
+import { componentSnapshot } from '@kit.ArkUI';
+import { image } from '@kit.ImageKit';
+import { util } from '@kit.ArkTS';
 import { common } from '@kit.AbilityKit';
 import { BusinessError } from '@kit.BasicServicesKit';
 import { BridgeController, WebviewControllerAdapter, BridgeJsLoader } from 'feature_bridge';
@@ -225,46 +228,33 @@ export class WebSlot {
   }
 
   /**
-   * 截取本槽 Web 内的 canvas（截图分享）。脚本在 H5 内 toDataURL，返回 dataURL；
-   * runJavaScript 回调的 result 是 JSON 字符串（外层带引号），需 JSON.parse 去引号还原。
-   * 非激活/出错一律返回空串（由 ShareProvider 降级网页分享，绝不抛错）。
+   * 截取本槽 Web 组件已渲染像素（截图分享）。改用 componentSnapshot 抓组件合成结果，
+   * 规避 WebGL canvas.toDataURL 黑屏问题；打包为 image/jpeg 的 dataURL 返回。
+   * 非激活/出错一律返回空串（由 ShareProvider 降级，绝不抛错）。canvasId 参数保留兼容、当前忽略。
    */
   private captureCanvas(canvasId: string): Promise<string> {
     if (!this.active || this.disposed) {
       return Promise.resolve('');
     }
-    const sel: string = canvasId !== ''
-      ? `document.getElementById(${JSON.stringify(canvasId)}).toDataURL('image/png')`
-      : `document.querySelector('canvas').toDataURL('image/jpeg',0.8)`;
-    const script: string = `(function(){try{return ${sel};}catch(e){return '';}})()`;
-    return new Promise<string>((resolve: (v: string) => void) => {
-      try {
-        this.controller.runJavaScript(script, (err: BusinessError, result: string) => {
-          if (err) {
-            WebSlot.log.w(`[${this.role}] captureCanvas runJavaScript error: ${err.message}`);
-            resolve('');
-            return;
-          }
-          resolve(WebSlot.parseJsString(result));
-        });
-      } catch (e) {
-        WebSlot.log.w(`[${this.role}] captureCanvas failed: ${(e as BusinessError).message}`);
-        resolve('');
-      }
-    });
-  }
-
-  /** runJavaScript 返回值是 JSON 字符串（字符串结果外层带引号）；去引号还原，异常返回空串。 */
-  private static parseJsString(result: string): string {
-    if (result === undefined || result === null || result === '' || result === 'null') {
-      return '';
-    }
-    try {
-      const parsed: Object = JSON.parse(result) as Object;
-      return typeof parsed === 'string' ? parsed as string : '';
-    } catch (e) {
-      return '';
-    }
+    const compId: string = `web_${this.role}`;
+    return componentSnapshot.get(compId, { waitUntilRenderFinished: true })
+      .then((pm: image.PixelMap): Promise<string> => {
+        const packer: image.ImagePacker = image.createImagePacker();
+        return packer.packToData(pm, { format: 'image/jpeg', quality: 90 })
+          .then((buf: ArrayBuffer): string => {
+            const b64: string = new util.Base64Helper().encodeToStringSync(new Uint8Array(buf));
+            WebSlot.log.i(`[${this.role}] snapshot ok bytes=${buf.byteLength}`);
+            return `data:image/jpeg;base64,${b64}`;
+          })
+          .finally(() => {
+            pm.release();
+            packer.release();
+          });
+      })
+      .catch((e: Object): string => {
+        WebSlot.log.w(`[${this.role}] componentSnapshot failed: ${(e as Error).message}`);
+        return '';
+      });
   }
 
   private flushPending(): void {
diff --git a/feature_capabilities/src/main/ets/providers/ShareProvider.ets b/feature_capabilities/src/main/ets/providers/ShareProvider.ets
index 6bdc4bb..68161f7 100644
--- a/feature_capabilities/src/main/ets/providers/ShareProvider.ets
+++ b/feature_capabilities/src/main/ets/providers/ShareProvider.ets
@@ -15,7 +15,7 @@
  */
 import { systemShare } from '@kit.ShareKit';
 import { uniformTypeDescriptor as utd } from '@kit.ArkData';
-import { fileUri } from '@kit.CoreFileKit';
+import { fileUri, fileIo } from '@kit.CoreFileKit';
 import { common, bundleManager } from '@kit.AbilityKit';
 import { BusinessError, pasteboard } from '@kit.BasicServicesKit';
 import { image } from '@kit.ImageKit';
@@ -316,7 +316,14 @@ export class ShareProvider implements CapabilityProvider {
 
   /** 图片写剪贴板（尽力；对方能否粘贴 PIXELMAP 不可保证，systemImage 才是可靠交付）。 */
   private writeClipboardImage(filePath: string): void {
-    const source: image.ImageSource = image.createImageSource(filePath);
+    let file: fileIo.File;
+    try {
+      file = fileIo.openSync(filePath, fileIo.OpenMode.READ_ONLY);
+    } catch (e) {
+      this.log.w(`clipboard image open failed: ${(e as Error).message}`);
+      return;
+    }
+    const source: image.ImageSource = image.createImageSource(file.fd);
     source.createPixelMap().then((pm: image.PixelMap) => {
       let data: pasteboard.PasteData;
       try {
@@ -326,14 +333,15 @@ export class ShareProvider implements CapabilityProvider {
         pm.release();
         return;
       }
-      // pm 须存活到 setData 完成（createData 可能持引用），故在 setData settle 后再 release。
       pasteboard.getSystemPasteboard().setData(data)
+        .then(() => this.log.i('clipboard image set ok'))
         .catch((e: BusinessError) => this.log.w(`clipboard image failed: ${e.code} ${e.message}`))
         .finally(() => pm.release());
     }).catch((e: BusinessError) => {
       this.log.w(`createPixelMap failed: ${e.code} ${e.message}`);
     }).finally(() => {
       source.release();
+      fileIo.closeSync(file);
     });
   }