diff --git a/static/db_admin.html b/static/db_admin.html
index c1ef5f0..6715323 100644
--- a/static/db_admin.html
+++ b/static/db_admin.html
@@ -2862,6 +2862,7 @@
         // 加载区划列表
         async function loadRegions() {
             const navList = document.getElementById('navList');
+            if (!navList) return;
             navList.innerHTML = '<div class="loading"><span class="loading-icon"></span>加载区划列表...</div>';
 
             try {
@@ -2899,6 +2900,7 @@
                 return;
             }
             const navList = document.getElementById('navList');
+            if (!navList) return;
             navList.innerHTML = '<div class="loading"><span class="loading-icon"></span>加载事项列表...</div>';
 
             try {
@@ -2981,11 +2983,17 @@
             currentStep = step;
 
             // 更新导航标题
-            document.getElementById('navTitle').querySelector('span').textContent = steps[step].title;
+            const navTitle = document.getElementById('navTitle');
+            if (navTitle) {
+                const span = navTitle.querySelector('span');
+                if (span) span.textContent = steps[step].title;
+            }
 
             // 更新上一步按钮
             const backButton = document.getElementById('backButton');
-            backButton.disabled = historyStack.length === 0;
+            if (backButton) {
+                backButton.disabled = historyStack.length === 0;
+            }
 
             // 更新步骤指示器
             updateStepIndicator(step);
@@ -2995,7 +3003,7 @@
 
             // 清空详情区域
             const detailsArea = document.getElementById('detailsArea');
-            if (step === 1) {
+            if (detailsArea && step === 1) {
                 detailsArea.innerHTML = `
                     <div class="empty-state">
                         <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
@@ -3019,6 +3027,7 @@
         // 更新面包屑导航
         function updateBreadcrumb() {
             const breadcrumb = document.getElementById('breadcrumb');
+            if (!breadcrumb) return;
             let html = `
                 <span class="breadcrumb-item">
                     <a onclick="goHome()">首页</a>
@@ -3093,6 +3102,7 @@
         // 显示许可详情
         async function showPermitDetails() {
             const detailsArea = document.getElementById('detailsArea');
+            if (!detailsArea) return;
             detailsArea.innerHTML = '<div class="loading"><span class="loading-icon"></span>加载许可详情...</div>';
 
             try {
@@ -3133,6 +3143,7 @@
         // 渲染许可详情
         function renderPermitDetails(permit) {
             const detailsArea = document.querySelector('.details-area');
+            if (!detailsArea) return;
             currentPermitDetails = permit;
             const riskCount = Array.isArray(permit.risks) ? permit.risks.length : 0;
             const permitTheme = permit && permit.theme ? permit.theme : {};