feat(homepage): 添加龙卷风抽奖和3D云抽奖安装包版本展示

- 新增龙卷风抽奖屏幕版本介绍和视频演示
- 添加3D云抽奖屏幕版本功能展示和操作文档链接
- 集成Windows和Mac平台下载选项，包括Intel和Apple芯片支持
- 添加星空背景和旋转效果预览视频
- 实现离线U盘使用和Excel一键导入功能说明
- 更新封面页面布局以包含新的抽奖产品展示区域

_coverpage.md

@@ -91,6 +91,61 @@
   </div>
 </div>
 
+<div class="luckday-video">
+  <div class="luckday-video-screen">
+    <div>
+      <h2 class="screen-title">龙卷风抽奖（安装包版本）</h2>
+      <h5> 星空背景，龙卷风照片墙。  
+        <a href="#/luck/screen-new.md" class="doc">
+          操作文档 →
+          <img src="_media/svg/doc.svg" alt="文档" />
+        </a>
+      </h5>
+      <h5> 数据绝对安全，支持1万人+，离线U盘可用 </h5>
+    </div>
+    <video class="screen-video" autoplay loop muted playsinline>
+      <source src="./_media/video/ljf.mp4" type="video/mp4">
+    </video>
+    <div class="buttons">
+      <a href="./_media/package/win-luckday-screen.zip" rel="noopener" target="_blank"><span>Win 下载</span>
+      </a>
+      <div class="dropdown">
+        <a class="dropdown-toggle" href="javascript:void(0)"><span>Mac 下载</span></a>
+        <div class="dropdown-menu">
+          <a href="./_media/package/mac-luckday-screen.zip" rel="noopener" target="_blank" style="width: 100%"><span>Mac (Intel 芯片)</span></a>
+          <a href="./_media/package/mac-arm64-luckday-screen.zip" rel="noopener" target="_blank" style="width: 100%"><span>Mac (Apple 芯片)</span></a>
+        </div>
+      </div>
+    </div>
+  </div>
+  <div class="luckday-video-screen">
+    <div>
+      <h2 class="screen-title">3D云抽奖（安装包版本）</h2>
+      <h5> 星空背景，3D旋转。  
+        <a href="#/luck/sky.md" class="doc">
+          操作文档 →
+          <img src="_media/svg/doc.svg" alt="文档" />
+        </a>
+      </h5>
+      <h5> Excel一键导入，支持1万人+，U盘即插即用，无需联网 </h5>
+    </div>
+    <video class="screen-video" autoplay loop muted playsinline>
+      <source src="./_media/video/3d.mp4" type="video/mp4">
+    </video>
+    <div class="buttons">
+      <a href="./_media/package/win-luckday-screen.zip" rel="noopener" target="_blank"><span>Win 下载</span>
+      </a>
+      <div class="dropdown">
+        <a class="dropdown-toggle" href="javascript:void(0)"><span>Mac 下载</span></a>
+        <div class="dropdown-menu">
+          <a href="./_media/package/mac-luckday-screen.zip" rel="noopener" target="_blank" style="width: 100%"><span>Mac (Intel 芯片)</span></a>
+          <a href="./_media/package/mac-arm64-luckday-screen.zip" rel="noopener" target="_blank" style="width: 100%"><span>Mac (Apple 芯片)</span></a>
+        </div>
+      </div>
+    </div>
+  </div>
+</div>
+
 <div class="luckday-video">
   <div class="luckday-video-screen">
     <div>