diff --git a/templates/create_certificate.html b/templates/create_certificate.html
index ac60955..e143c12 100644
--- a/templates/create_certificate.html
+++ b/templates/create_certificate.html
@@ -107,9 +107,9 @@
 <div class="modal fade" id="sanWarningModal" tabindex="-1" aria-labelledby="sanWarningModalLabel" aria-hidden="true">
     <div class="modal-dialog">
         <div class="modal-content">
-            <div class="modal-header">
+            <div class="modal-header bg-danger text-white">  <!-- 修改了这一行，添加了bg-danger和text-white类 -->
                 <h5 class="modal-title" id="sanWarningModalLabel">缺少SAN扩展警告</h5>
-                <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
+                <button type="button" class="btn-close btn-close-white" data-bs-dismiss="modal" aria-label="Close"></button>
             </div>
             <div class="modal-body">
                 <p>您没有配置任何SAN(主题备用名称)扩展，这可能导致以下问题：</p>