diff --git a/src/routes/admin/settings/+page.svelte b/src/routes/admin/settings/+page.svelte
index cc7a6d4..52d91e0 100644
--- a/src/routes/admin/settings/+page.svelte
+++ b/src/routes/admin/settings/+page.svelte
@@ -115,7 +115,7 @@
 			</form>
 		</div>
 
-		<div class="settings-card">
+		<div class="settings-card full-width">
 			<h3>系统与安全环境</h3>
 			<div class="info-row">
 				<span class="label">主题风格</span>
@@ -139,7 +139,7 @@
 			</div>
 		</div>
 
-		<div class="settings-card">
+		<div class="settings-card full-width">
 			<h3>API 与 AI 集成 (Agent/MCP)</h3>
 			<p class="desc">
 				配置允许 AI 或第三方工具直接管理文章的 API 访问令牌 (Token)。请求 API 时请在 HTTP Header
@@ -331,6 +331,7 @@
 		grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
 		gap: 25px;
 		align-items: stretch;
+		max-width: 860px;
 	}
 
 	.full-width {