diff --git a/src/main/resources/views/platform/zhghh5/scan/index.html b/src/main/resources/views/platform/zhghh5/scan/index.html
index 45beba1..d78bfbc 100644
--- a/src/main/resources/views/platform/zhghh5/scan/index.html
+++ b/src/main/resources/views/platform/zhghh5/scan/index.html
@@ -115,6 +115,7 @@ layout("/layouts/platform_h5.html"){
 
     <div class="footer-container">
         <van-button v-if="scanStatus" @click="closeScan" block color="#006DB9">关闭扫描</van-button>
+        <van-button v-if="scanStatus" @click="cameraVisible = true" plain type="primary">切换摄像头</van-button>
         <van-button v-else @click="initCamera" block color="#006DB9">点击扫描</van-button>
     </div>
 
@@ -196,12 +197,20 @@ layout("/layouts/platform_h5.html"){
                 this.scanStatus = true;
 
                 try {
+                    const container = document.getElementById('reader');
+                    const size = Math.min(container.clientWidth * 0.8, 300); // 最大 300px
                     await this.html5QrCode.start(
                         cameraId,
                         {
-                            fps: 300,
-                            qrbox: { width: 300, height: 300 },
-                            aspectRatio: 1.0
+                            fps: 10,
+                            qrbox: size,
+                            videoConstraints: {
+                                width: { ideal: 1280 },
+                                height: { ideal: 720 },
+                                facingMode: "environment" // 强制后置（部分浏览器支持）
+                            },
+                            disableFlip: true, // 防止镜像
+                            formatsToSupport: [Html5QrcodeSupportedFormats.QR_CODE] // 只扫 QR，提升速度
                         },
                         (decodedText) => {
                             this.decodedText = decodedText
@@ -221,11 +230,18 @@ layout("/layouts/platform_h5.html"){
             async closeScan() {
                 if (!this.html5QrCode || !this.scanStatus) return;
                 try {
+                    const videoEl = this.html5QrCode?.getState()?.camera?.stream?.getVideoTracks();
+                    if (videoEl && videoEl.length) {
+                        videoEl.forEach(track => track.stop());
+                    }
                     await this.html5QrCode.stop();
-                    this.scanStatus = false;
-                    this.html5QrCode = null;
                 } catch (err) {
                     console.error('关闭失败:', err);
+                }finally {
+                    this.scanStatus = false;
+                    this.html5QrCode = null;
+                    const reader = document.getElementById('reader');
+                    if (reader) reader.innerHTML = '';
                 }
             },