diff --git a/.gitea/workflows/demo.yaml b/.gitea/workflows/demo.yaml
index 196ca39..d2d891e 100644
--- a/.gitea/workflows/demo.yaml
+++ b/.gitea/workflows/demo.yaml
@@ -9,6 +9,16 @@ jobs:
       - name: Check out repository code
         uses: https://gitee.com/mirror-actions/checkout@v4
       - run: cd ${{ gitea.workspace }}
+      - name: Insert post image
+        run: |
+          set -euo pipefail
+          post_content="$(cat post.html)"
+          find . -type f -name "*.md" -print0 | while IFS= read -r -d '' file; do
+            {
+              printf '\n'
+              printf '%s\n' "$post_content"
+            } >> "$file"
+          done
       - run: npx refs-cli
       - name: copy exports to www
         run: |
diff --git a/docs/智能化实验.md b/docs/智能化实验.md
index c1ea1ba..0b54501 100644
--- a/docs/智能化实验.md
+++ b/docs/智能化实验.md
@@ -251,12 +251,3 @@ loss值长期卡在0.6~0.7代表着模型完全没能学习到任何信息
 
 软件会自动为您画出一张图。横坐标是“体积”，纵坐标是“颜色状态的概率”。
 
-
-## END
-
-<!--rehype:wrap-style=text-align:center;-->
-<img
-  src="https://flt6.top/today"
-  alt="封面图"
-  width="600"
-/>
diff --git a/post.html b/post.html
new file mode 100644
index 0000000..9a9d95f
--- /dev/null
+++ b/post.html
@@ -0,0 +1,23 @@
+
+## END
+
+<!--rehype:wrap-style=text-align:center;-->
+<img
+  src="https://flt6.top/today"
+  class="responsive-img"
+/>
+
+<style>
+.responsive-img {
+  width: 50%;
+  height: auto;
+  display: block;
+  margin: 0 auto;
+}
+
+@media  (max-width: 768px), (orientation: portrait) {
+  .responsive-img {
+    width: 90%;
+  }
+}
+</style>
\ No newline at end of file
diff --git a/readme.md b/readme.md
index 8b6ff27..54405e2 100644
--- a/readme.md
+++ b/readme.md
@@ -4,12 +4,3 @@ flt QRH
 [实验](./docs/实验.md) <!--rehype:style=background:rgb(79 91 147);-->
 [智能化实验](./docs/智能化实验.md) <!--rehype:style=background: #0F4954;-->
 <!--rehype:class=home-card-->
-
-## END
-
-<!--rehype:wrap-style=text-align:center;-->
-<img
-  src="https://flt6.top/today"
-  alt="封面图"
-  width="600"
-/>