feat: add custom CSS for MinerU demo page layout and iframe styling

docs/en/demo/index.md

@@ -1 +1,8 @@
-<iframe src="https://opendatalab-mineru.ms.show" style="min-height: calc(-40px + 100vh); width: 100%; flex-grow: 1; border: medium; overflow: auto; height: 1746px;"></iframe>
+---
+hide:
+  - toc
+---
+
+<div class="mineru-demo-page">
+<iframe class="mineru-demo-iframe" src="https://opendatalab-mineru.ms.show" title="MinerU online demo"></iframe>
+</div>

docs/stylesheets/extra.css

@@ -0,0 +1,29 @@
+/* demo 页面嵌入 Gradio，需要隐藏右侧目录列并释放主内容宽度。 */
+.md-main__inner:has(.mineru-demo-page) {
+  max-width: 100%;
+}
+
+.md-main__inner:has(.mineru-demo-page) .md-sidebar--secondary {
+  display: none;
+}
+
+.md-main__inner:has(.mineru-demo-page) .md-content {
+  max-width: none;
+}
+
+.md-main__inner:has(.mineru-demo-page) .md-content__inner {
+  margin-right: 0;
+}
+
+.mineru-demo-page {
+  width: 100%;
+}
+
+.mineru-demo-iframe {
+  display: block;
+  width: 100%;
+  min-height: calc(-40px + 100vh);
+  height: 1746px;
+  border: 0;
+  overflow: auto;
+}

docs/zh/demo/index.md

@@ -1 +1,8 @@
-<iframe src="https://opendatalab-mineru.ms.show" style="min-height: calc(-40px + 100vh); width: 100%; flex-grow: 1; border: medium; overflow: auto; height: 1746px;"></iframe>
+---
+hide:
+  - toc
+---
+
+<div class="mineru-demo-page">
+<iframe class="mineru-demo-iframe" src="https://opendatalab-mineru.ms.show" title="MinerU 在线演示"></iframe>
+</div>

mkdocs.yml

@@ -71,6 +71,9 @@ extra:
 
 copyright: © 2024 - 2025 MinerU. All Rights Reserved.
 
+extra_css:
+  - stylesheets/extra.css
+
 nav:
   - Home:
     - "MinerU": index.md