diff --git a/adapters/src/official/backend.rs b/adapters/src/official/backend.rs
index e48fa03..f45454f 100644
--- a/adapters/src/official/backend.rs
+++ b/adapters/src/official/backend.rs
@@ -133,7 +133,12 @@ fn sanitize_component(component: &str, url: &str) -> Result<String, String> {
     if component == "." || component == ".." || component.is_empty() {
         return Err(format!("官方 URL 包含不安全路径片段：{url}"));
     }
-    if component.contains('?') || component.contains('#') || component.contains('\\') {
+    if component.contains('?') || component.contains('#') {
+        return Err(format!(
+            "官方资源 URL 包含 query 或 fragment 等不安全路径字符：{url}"
+        ));
+    }
+    if component.contains('\\') {
         return Err(format!("官方资源 URL 包含不安全路径字符：{url}"));
     }
     Ok(component.to_string())