解决布局跳动问题

src/components/Examples.vue

@@ -11,9 +11,6 @@ const { breakpoint } = useBootstrapBreakpoint();
 <template>
   <div class="pageroot" id="examplesprocessroot">
     <div id="examplebanner" class="videorootbanner">
-      <!--      <img v-if="$isMobile.android.phone||$isMobile.android.tablet"-->
-      <!--           src="/ExpVideoPreload.png"-->
-      <!--           class="videoimg"/>-->
       <video v-if="breakpoint==='xs'||breakpoint==='sm'||breakpoint==='md'"
              controls=""
              id="expbannervideo"
@@ -23,7 +20,6 @@ const { breakpoint } = useBootstrapBreakpoint();
         <source :src="ExpVideo" type="video/mp4"></source>
       </video>
       <video v-else
-             :poster="ExpVideoPreload"
              id="expbannervideo"
              muted autoplay="autoplay"
              loop="loop" playsinline webkit-playsinline
@@ -52,7 +48,36 @@ const { breakpoint } = useBootstrapBreakpoint();
 <script>
 import axios from 'axios';
 export default {
-  name: "Examples"
+  name: "Examples",
+  mounted() {
+    this.$nextTick(function() {
+      this.handleVideoLoad();
+    });
+  },
+  methods: {
+    handleVideoLoad: function() {
+      const video = document.getElementById('expbannervideo');
+      const container = document.getElementById('examplebanner');
+
+      if (video && container) {
+        // 优化：使用loadedmetadata事件，这是视频尺寸信息可用的最早时机
+        const handleVideoReady = () => {
+          container.classList.add('video-loaded');
+          // 移除事件监听器避免重复触发
+          video.removeEventListener('loadedmetadata', handleVideoReady);
+          video.removeEventListener('canplay', handleVideoReady);
+        };
+
+        video.addEventListener('loadedmetadata', handleVideoReady);
+        video.addEventListener('canplay', handleVideoReady);
+
+        // 如果视频已经有尺寸信息，立即触发
+        if (video.videoWidth > 0) {
+          handleVideoReady();
+        }
+      }
+    }
+  }
 }
 </script>
 

src/components/Homepage.vue

@@ -19,18 +19,14 @@ const { breakpoint } = useBootstrapBreakpoint();
 <template>
   <div id="homepageroot" class="pageroot">
      <div id="homepagebanner" class="videorootbanner">
-<!--    <img v-if="$isMobile.android.phone||$isMobile.android.tablet"-->
-<!--         src="/bannervideopreload.png"-->
-<!--         class="videoimg"/>-->
       <video v-if="breakpoint==='xs'||breakpoint==='sm'||breakpoint==='md'"
-             :poster="bannervideopreload" controls=""
              id="bannervideo" muted autoplay="autoplay" loop="loop"
              playsinline webkit-playsinline
              class="bannervideos"
              x5-video-player-type="h5-page">
         <source :src="HpgVideo" type="video/mp4"></source>
       </video>
-      <video v-else :poster="bannervideopreload"
+      <video v-else
              id="bannervideo" muted autoplay="autoplay" loop="loop"
              playsinline webkit-playsinline
              class="bannervideos"
@@ -179,6 +175,7 @@ export default {
   mounted() {
     this.$nextTick(function() {
       this.video_autoplay();
+      this.handleVideoLoad();
     });
   },
   methods:{
@@ -190,6 +187,28 @@ export default {
           video.play();
         }
       });
+    },
+    handleVideoLoad: function() {
+      const video = document.getElementById('bannervideo');
+      const container = document.getElementById('homepagebanner');
+
+      if (video && container) {
+        // 优化：使用loadedmetadata事件，这是视频尺寸信息可用的最早时机
+        const handleVideoReady = () => {
+          container.classList.add('video-loaded');
+          // 移除事件监听器避免重复触发
+          video.removeEventListener('loadedmetadata', handleVideoReady);
+          video.removeEventListener('canplay', handleVideoReady);
+        };
+
+        video.addEventListener('loadedmetadata', handleVideoReady);
+        video.addEventListener('canplay', handleVideoReady);
+
+        // 如果视频已经有尺寸信息，立即触发
+        if (video.videoWidth > 0) {
+          handleVideoReady();
+        }
+      }
     }
   }
 }

src/components/ServiceProcess.vue

@@ -107,6 +107,9 @@ export default {
   @include media-breakpoint-between(xs, md) {
     aspect-ratio: 1.92;
   }
+  @include media-breakpoint-up(md){
+    aspect-ratio: 2.62026969;
+  }
 }
 
 #blackchart{

src/publicstyle.scss

@@ -36,11 +36,38 @@
 
 .videorootbanner{
   width: 100%;
-  height: auto;
   background-color: black;
   position: relative;
-  z-index: 0; // 明确设置父容器z-index
-  overflow: hidden; // 帮助创建新的堆叠上下文
+  z-index: 0;
+  overflow: hidden;
+
+  // 默认状态：视频未加载时使用固定aspect-ratio
+  @include media-breakpoint-between(xs, md) {
+    aspect-ratio: 1.92;
+  }
+  @include media-breakpoint-up(md){
+    aspect-ratio: 2.62026969;
+  }
+
+  // 视频元素默认样式
+  video {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+    display: block;
+  }
+
+  // 当视频加载完成后，切换为自适应高度模式
+  &.video-loaded {
+    aspect-ratio: unset; // 移除固定比例
+    height: auto; // 高度自适应
+
+    video {
+      width: 100%; // 宽度占满
+      height: auto; // 高度自适应
+      object-fit: contain; // 保持视频比例，完整显示
+    }
+  }
 }
 
 .bannervideos{