diff --git a/src/oj/submission/components/FlowchartScoreDetail.vue b/src/oj/submission/components/FlowchartScoreDetail.vue
index a473782..a25fb86 100644
--- a/src/oj/submission/components/FlowchartScoreDetail.vue
+++ b/src/oj/submission/components/FlowchartScoreDetail.vue
@@ -191,8 +191,9 @@ watch(() => props.submissionId, loadSubmission, { immediate: true })
   padding: 32px;
   box-sizing: border-box;
   background: #ffffff;
-  /* 改为可滚动块布局，超出视口的大图可以滚动查看 */
-  display: block;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
   overflow: auto;
 }
 
@@ -208,10 +209,9 @@ watch(() => props.submissionId, loadSubmission, { immediate: true })
   height: 100%;
 }
 
-/* 全屏时按自然尺寸显示并水平居中，配合容器滚动 */
+/* 全屏时按自然尺寸显示，水平居中由 flex 容器负责 */
 :deep(.flowchart-fullscreen > svg) {
   display: block;
-  margin: 0 auto;
   width: auto;
   height: auto;
   max-width: none;