fix mike

.github/workflows/preview.yaml

@@ -3,6 +3,9 @@ on:
   pull_request:
     branches:
       - main
+  push:
+    branches:
+      - preview
 permissions:
   contents: write
   pull-requests: write
@@ -28,7 +31,8 @@ jobs:
             mkdocs-material-
       - run: pip install -r requirements.txt
       - run: |
-          mike deploy dev -p
+          git fetch origin
+          mike deploy dev -p --allow-empty
           echo "Preview URL: https://leanprover.cn/dev/" >> $GITHUB_STEP_SUMMARY
 
       - name: Comment PR with Preview Link
@@ -37,10 +41,19 @@ jobs:
           script: |
             const { payload } = context;
             const prNumber = payload.number;
-            const previewLink = `https://leanprover.cn/dev/`;
-            github.rest.issues.createComment({
+            const baseUrl = 'https://leanprover.cn';
+            const previewLink = `${baseUrl}/dev/`;
+            const comments = await github.rest.issues.listComments({
               issue_number: prNumber,
               owner: context.repo.owner,
               repo: context.repo.repo,
-              body: `Preview available at: ${previewLink}`
-            });
+            });
+            const existingComment = comments.data.find(comment => comment.body.includes(previewLink));
+            if (!existingComment) {
+              await github.rest.issues.createComment({
+                issue_number: prNumber,
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                body: `Preview available at: ${previewLink}`
+              });
+            }

docs/assets/css/custom.css

@@ -10,18 +10,11 @@ body {
   }
 
   .md-content img {
-    max-width: 200px;
+    max-width: 75%;
     display: block;
     margin: 0 auto;
   }
 
-  .md-content blockquote {
-    font-style: italic;
-    color: #555;
-    border-left: 4px solid #8bc34a;
-    padding-left: 15px;
-    margin-left: 0;
-  }
 
   .md-content p {
     margin-top: 20px;