diff --git a/login-base/src/main/resources/templates/default-main.html b/login-base/src/main/resources/templates/default-main.html
index 6309090e..551f02f4 100644
--- a/login-base/src/main/resources/templates/default-main.html
+++ b/login-base/src/main/resources/templates/default-main.html
@@ -62,7 +62,7 @@
                     </a>
                     <div class="system-box">
                         <div class="system-item-list">
-                            <a th:href="${system.menuUrl}" class="system-item" th:classappend="${'system-item-bg'+ userStat.index}" th:title="${system.menuName}" th:each="system,userStat: ${systems}">
+                            <a th:href="${system.menuUrl}" class="system-item" th:classappend="${'system-item-bg'+ (userStat.index % 7)}" th:title="${system.menuName}" th:each="system,userStat: ${systems}">
                                 <div class="icon">
                                     <i th:class="${system.menuIcon}"></i>
                                 </div>