diff --git a/bin/html2pptx.js b/bin/html2pptx.js
index 6660185..5588cfb 100644
--- a/bin/html2pptx.js
+++ b/bin/html2pptx.js
@@ -155,10 +155,17 @@ async function main() {
     const slidesData = await page.evaluate(() => {
       // ----- Slide detection -----
       var slides;
-      // DashiAI format: .ppt-deck > .ppt-slide
-      var deck = document.querySelector('.ppt-deck');
-      if (deck) {
-        slides = deck.querySelectorAll(':scope > .ppt-slide');
+      // DashiAI format: .imported-theme-root > .slide.imported-theme-slide
+      var themeRoot = document.querySelector('.imported-theme-root');
+      if (themeRoot) {
+        slides = themeRoot.querySelectorAll(':scope > .slide.imported-theme-slide');
+      }
+      if (!slides || slides.length <= 1) {
+        // DashiAI old format: .ppt-deck > .ppt-slide
+        var deck = document.querySelector('.ppt-deck');
+        if (deck) {
+          slides = deck.querySelectorAll(':scope > .ppt-slide');
+        }
       }
       if (!slides || slides.length <= 1) {
         slides = document.querySelectorAll(