diff --git a/src/assets/styles/student-training.scss b/src/assets/styles/student-training.scss
index 809ec88..4d4556e 100644
--- a/src/assets/styles/student-training.scss
+++ b/src/assets/styles/student-training.scss
@@ -1064,7 +1064,7 @@ body.student-light-mode {
   white-space: nowrap !important;
 }
 
-@media (max-width: 1100px) {
+@media (max-width: 800px) {
   /* AI 悬浮球/面板在窄屏仍 fixed 悬浮；面板宽度自适应 100vw-32px */
 
   .student-training-shell .workbench-actions {