diff --git a/src/assets/step2/2.mp4 b/src/assets/step2/2.mp4
index df846ab..95dd100 100644
Binary files a/src/assets/step2/2.mp4 and b/src/assets/step2/2.mp4 differ
diff --git a/src/assets/step2/3.mp4 b/src/assets/step2/3.mp4
deleted file mode 100644
index 46d3031..0000000
Binary files a/src/assets/step2/3.mp4 and /dev/null differ
diff --git a/src/components/ReportMetricCard/index.vue b/src/components/ReportMetricCard/index.vue
index b84eda6..d9a2771 100644
--- a/src/components/ReportMetricCard/index.vue
+++ b/src/components/ReportMetricCard/index.vue
@@ -184,8 +184,8 @@ const displayMainValue = computed(() => {
 
 <style scoped lang="scss">
 .report-metric-card {
-  width: 158px;
-  height: 158px;
+  width: 168px;
+  height: 168px;
   box-sizing: border-box;
   background: #fff;
   border-radius: 12px;
diff --git a/src/types/silly-datetime.d.ts b/src/types/silly-datetime.d.ts
new file mode 100644
index 0000000..531eaee
--- /dev/null
+++ b/src/types/silly-datetime.d.ts
@@ -0,0 +1,4 @@
+declare module 'silly-datetime' {
+  export function format(date: Date | number | string, pattern?: string): string;
+}
+
diff --git a/src/views/step2.vue b/src/views/step2.vue
index d65eabf..e68ff33 100644
--- a/src/views/step2.vue
+++ b/src/views/step2.vue
@@ -13,7 +13,6 @@
           :src="tipsVideoSrc"
           muted
           playsinline
-          autoplay
           preload="auto"
           @ended="onTipsEnded"
           @timeupdate="onTipsTimeUpdate"
@@ -63,7 +62,7 @@ import { Capacitor } from '@capacitor/core';
 import { StatusBar, Style } from '@capacitor/status-bar';
 import { CameraPreview } from '@capgo/camera-preview';
 import { Circle as VanCircle } from 'vant';
-import { computed, onBeforeUnmount, onMounted, ref } from 'vue';
+import { computed, nextTick, onBeforeUnmount, onMounted, ref } from 'vue';
 import { useRouter } from 'vue-router';
 import tips2Url from '@/assets/step2/2.mp4?url';
 
@@ -81,7 +80,8 @@ const PREVIEW_ASPECT = 4 / 3; // 4:3，不裁剪；想更宽可改 16/9
 const RETICLE_CENTER_Y = 0.3;
 
 const tipsVideoEl = ref<HTMLVideoElement | null>(null);
-const showTipsVideo = ref(true);
+// 相机未授权/未启动时不要播放提示视频
+const showTipsVideo = ref(false);
 const tipsVideoSrc = computed(() => tips2Url);
 let navigatingToStep3 = false;
 function onTipsTimeUpdate() {
@@ -119,7 +119,7 @@ function onTipsEnded() {
   // 进度到 100%：停止录制拿到 videoFilePath，并跳转 step3
   if (!navigatingToStep3) {
     navigatingToStep3 = true;
-    setTimeout(() => {
+    // setTimeout(() => {
       queueMicrotask(async () => {
       try {
         await teardownRecorder(); // 内部会写 sessionStorage['step2_video_path']
@@ -127,7 +127,7 @@ function onTipsEnded() {
         router.push('/step3');
       }
     });
-    }, 5000);
+    // }, 2000);
   }
 }
 
@@ -247,6 +247,7 @@ onMounted(async () => {
   document.documentElement.classList.add('step2-camera-active');
   progress.value = 0;
   currentRate.value = 0;
+  showTipsVideo.value = false;
 
   if (!Capacitor.isNativePlatform()) {
     statusText.value = '请在真机或模拟器（Capacitor）中打开以使用前置录像';
@@ -267,11 +268,23 @@ onMounted(async () => {
 
   try {
     await setupNativeRecorder();
-    // 相机正常启动后再播放提示视频
+    // 相机正常启动后再显示/播放提示视频
+    showTipsVideo.value = true;
+    await nextTick();
     tryPlayTips();
   } catch (e) {
     console.error(e);
     statusText.value = '无法启动相机或麦克风，请检查系统权限';
+    showTipsVideo.value = false;
+    const el = tipsVideoEl.value;
+    if (el) {
+      try {
+        el.pause();
+        el.currentTime = 0;
+      } catch {
+        /* ignore */
+      }
+    }
   }
 });
 
diff --git a/src/views/step3.vue b/src/views/step3.vue
index 92aa334..9d58565 100644
--- a/src/views/step3.vue
+++ b/src/views/step3.vue
@@ -21,7 +21,7 @@
 import { Capacitor } from '@capacitor/core';
 import { ref, onMounted } from 'vue';
 import { useRouter } from 'vue-router';
-import { format } from 'silly-datetime';
+
 const showHelp = ref(true);
 const router = useRouter();
 const start = () => {
@@ -147,12 +147,40 @@ onMounted(async () => {
     // router.push('/step4');
     return;
   }
-
+ 
   try {
+    const now =
+      typeof performance !== 'undefined' && typeof performance.now === 'function'
+        ? () => performance.now()
+        : () => Date.now();
+    const t0 = now();
+
+    const tBlob0 = now();
     const blob = await videoUrlToBlob(videoPath);
+    const tBlob1 = now();
+
+    const tDataUrl0 = now();
     const dataUrl = await blobToDataUrl(blob);
+    const tDataUrl1 = now();
+
+    const tArk0 = now();
     const result = await analyzeVideoWithArk(dataUrl);
+    const tArk1 = now();
+
     sessionStorage.setItem('step2_ark_result', JSON.stringify(result));
+    const tSave = now();
+
+    const timing = {
+      total_ms: Math.round(tSave - t0),
+      steps_ms: {
+        videoUrlToBlob: Math.round(tBlob1 - tBlob0),
+        blobToDataUrl: Math.round(tDataUrl1 - tDataUrl0),
+        analyzeVideoWithArk: Math.round(tArk1 - tArk0),
+        saveResult: Math.round(tSave - tArk1)
+      }
+    };
+    sessionStorage.setItem('step3_timing', JSON.stringify(timing));
+
     router.push('/step4');
   } catch (e: any) {
     console.error(e);
@@ -161,7 +189,7 @@ onMounted(async () => {
   }
 
   // 拿到接口返回（成功/失败都算）再进入 step4
-  
+
 });
 
 </script>
@@ -233,6 +261,7 @@ onMounted(async () => {
       align-items: center;
       justify-content: center;
       gap: 10px;
+
       .tips-icon {
         width: 32px;
         height: 32px;
@@ -250,6 +279,7 @@ onMounted(async () => {
   from {
     transform: rotate(0deg);
   }
+
   to {
     transform: rotate(360deg);
   }
diff --git a/src/views/step4.vue b/src/views/step4.vue
index 3b732b7..bbca1d0 100644
--- a/src/views/step4.vue
+++ b/src/views/step4.vue
@@ -47,12 +47,13 @@
           </div>
           <div class="r" @click="router.replace('/')"><img src="@/assets/close.png" alt=""></div>
         </div>
-        <div class="main">
+        <div v-html="summaryText" class="summary-text"> </div>
+        <!-- <div class="main">
           <img class="tips" src="@/assets/step5/tips.png" alt="">
           <img class="ip" src="@/assets/step1/ip.png" alt="">
 
-        </div>
-        <div class="info">
+        </div> -->
+        <!-- <div class="info">
           <div class="title">以下是你的心理压力指数MSI指标</div>
           <div class="msi-card">
             <div class="msi-score">
@@ -84,7 +85,7 @@
             </p>
             <p> 适度参与户外活动（如散步、慢跑、瑜伽），每周 2-3 次，每次 30 分钟以上，通过运动释放负面情绪，提升身心愉悦感。</p>
           </div>
-        </div>
+        </div> -->
       </div>
     </Transition>
   </div>
@@ -139,7 +140,7 @@ if (arkResult) {
   // console.log(summaryText.value); //文本
   data.value = JSON.parse(result?.output[1]?.content[0]?.text);
   creatTime.value = format(new Date(result.created_at ? result.created_at * 1000 : new Date()), 'YYYY-MM-DD HH:mm:ss')
-
+  summaryText.value = data.value?.brief_report?.summary_text;
   list1.value = [
     {
       type: 4 as const,
@@ -363,7 +364,7 @@ if (arkResult) {
 
       .l {
         position: absolute;
-        width: 155px;
+        width: 168px;
         top: 125px;
         left: -222px;
         display: flex;
@@ -374,7 +375,7 @@ if (arkResult) {
 
       .r {
         position: absolute;
-        width: 155px;
+        width: 168px;
         top: 125px;
         right: -222px;
         display: flex;
@@ -399,9 +400,6 @@ if (arkResult) {
     padding: 0 24px;
     box-sizing: border-box;
   }
-
-
-
 }
 
 /* 详情页（原 step5）的样式直接复用 */
@@ -409,7 +407,7 @@ if (arkResult) {
   padding-top: 52px;
   display: flex;
   flex-direction: column;
-  justify-content: space-between;
+  // justify-content: space-between;
 
   .top {
     position: relative;
@@ -583,6 +581,9 @@ if (arkResult) {
       }
     }
   }
+  .summary-text{
+    padding: 50px;
+  }
 }
 
 /* 内部切换动画：上下滑 + 淡入淡出（支持正/反向） */