Update app.py

app.py

@@ -295,19 +295,51 @@ body, .gradio-container {
 .gradio-group:hover { box-shadow: 0 8px 32px rgba(168, 85, 247, 0.12) !important; border-color: #C084FC !important; }
 .dark .gradio-group { background: rgba(30, 30, 30, 0.9) !important; border-color: rgba(168, 85, 247, 0.3) !important; }
 
-/* ======== 修改：使用原生组件但优化视觉样式 ======== */
+/* ======== 优化：文件上传框居中与背景清理 ======== */
 #pdf-upload-box {
     border: 2px dashed rgba(192, 132, 252, 0.6) !important;
     border-radius: 12px !important;
     background-color: rgba(250, 245, 255, 0.5) !important;
     transition: all 0.3s ease !important;
+    min-height: 220px !important; /* 增加高度提供居中空间 */
+    position: relative !important;
 }
+
 #pdf-upload-box:hover {
     border-color: #A855F7 !important;
     background-color: rgba(243, 232, 255, 0.8) !important;
     box-shadow: 0 4px 15px rgba(168, 85, 247, 0.15) !important;
 }
 
+/* 隐藏原生的中/英文上传提示、图标及背景 */
+#pdf-upload-box .upload-container {
+    background: transparent !important;
+}
+#pdf-upload-box .upload-container > span,
+#pdf-upload-box .upload-container > svg {
+    display: none !important; 
+}
+
+/* 使用伪元素在中央注入自定义文字和图标 */
+#pdf-upload-box .upload-container::before {
+    content: "📤\\A Click here to select a PDF\\A or Drag & Drop the file here";
+    white-space: pre-wrap;
+    font-size: 1.2rem;
+    line-height: 1.8;
+    font-weight: 600;
+    color: #9333EA;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    text-align: center;
+    width: 100%;
+    height: 100%;
+    position: absolute;
+    top: 0;
+    left: 0;
+    pointer-events: none; /* 防止遮挡拖拽事件 */
+}
+
 /* ======== 新增：主要操作按钮 (Start Mineru & Generate All) 悬浮与圆角动效 ======== */
 .primary-action-btn {
     border-radius: 30px !important;
@@ -373,9 +405,9 @@ with gr.Blocks(theme=purple_theme, css=custom_css) as demo:
                 with gr.Group(elem_classes="gradio-group"):
                     gr.Markdown("### 📄 2. Document Parsing")
                     
-                    # 修复：移除破坏原生功能的全局遮罩，使用原生 label 参数自定义英文提示，保留完美的原生拖拽识别机制
+                    # 简化了 Label，因为 CSS 已经接管了内部文字渲染
                     pdf_input = gr.File(
-                        label="🖱️ Click here to select a PDF or Drag & Drop the file here", 
+                        label="Upload Document", 
                         file_types=[".pdf"], 
                         elem_id="pdf-upload-box"
                     )