diff --git a/suixinkan/Base/BaseViewController.swift b/suixinkan/Base/BaseViewController.swift
index 66a47d7..e7bdf43 100644
--- a/suixinkan/Base/BaseViewController.swift
+++ b/suixinkan/Base/BaseViewController.swift
@@ -119,6 +119,30 @@ class BaseViewController: UIViewController {
         navigationController?.popViewController(animated: true)
     }
 
+    /// 沿 presentation 链找到当前最顶层控制器，避免 Sheet 已展示时 present 冲突。
+    func topMostPresentedViewController() -> UIViewController {
+        var top: UIViewController = self
+        while let presented = top.presentedViewController {
+            top = presented
+        }
+        return top
+    }
+
+    /// 在当前可见 presentation 链顶端弹出页面。
+    func presentOnTop(
+        _ viewController: UIViewController,
+        animated: Bool = true,
+        completion: (() -> Void)? = nil
+    ) {
+        topMostPresentedViewController().present(viewController, animated: animated, completion: completion)
+    }
+
+    /// 全屏预览网络图片。
+    func presentImagePreview(imageURLs: [String], startIndex: Int) {
+        guard !imageURLs.isEmpty else { return }
+        presentOnTop(ImagePreviewViewController(imageURLs: imageURLs, startIndex: startIndex))
+    }
+
     // MARK: - Notifications
 
     private func registerBaseNotifications() {
diff --git a/suixinkan/UI/Orders/OrderSourceLeadListViewController.swift b/suixinkan/UI/Orders/OrderSourceLeadListViewController.swift
index 7d37332..08311e3 100644
--- a/suixinkan/UI/Orders/OrderSourceLeadListViewController.swift
+++ b/suixinkan/UI/Orders/OrderSourceLeadListViewController.swift
@@ -16,7 +16,6 @@ final class OrderSourceLeadListViewController: BaseViewController, UITableViewDa
     private let loadLeads: (OrderSourcePerson) async -> Void
     private let onLeadBound: (OrderSourceSelection) -> Void
     private let onCallPhone: (String) -> Void
-    private let onPreviewImages: ([String], Int) -> Void
 
     private let phoneRow = UIStackView()
     private let phoneLabel = UILabel()
@@ -32,8 +31,7 @@ final class OrderSourceLeadListViewController: BaseViewController, UITableViewDa
         referralOrder: BoundReferralOrderEntity?,
         loadLeads: @escaping (OrderSourcePerson) async -> Void,
         onLeadBound: @escaping (OrderSourceSelection) -> Void,
-        onCallPhone: @escaping (String) -> Void,
-        onPreviewImages: @escaping ([String], Int) -> Void
+        onCallPhone: @escaping (String) -> Void
     ) {
         self.person = person
         self.orderNumber = orderNumber
@@ -42,7 +40,6 @@ final class OrderSourceLeadListViewController: BaseViewController, UITableViewDa
         self.loadLeads = loadLeads
         self.onLeadBound = onLeadBound
         self.onCallPhone = onCallPhone
-        self.onPreviewImages = onPreviewImages
         super.init(nibName: nil, bundle: nil)
     }
 
@@ -178,7 +175,9 @@ final class OrderSourceLeadListViewController: BaseViewController, UITableViewDa
             && currentSelection?.lead.key == lead.key
         cell.configure(lead: lead, selected: selected)
         cell.onCallPhone = onCallPhone
-        cell.onImageTap = onPreviewImages
+        cell.onImageTap = { [weak self] urls, index in
+            self?.presentImagePreview(imageURLs: urls, startIndex: index)
+        }
         cell.onSelect = { [weak self] in
             guard let self else { return }
             let selection = OrderSourceSelection(person: self.person, lead: lead)
diff --git a/suixinkan/UI/Orders/OrderSourcePickerViewController.swift b/suixinkan/UI/Orders/OrderSourcePickerViewController.swift
index d947b7f..6a7912f 100644
--- a/suixinkan/UI/Orders/OrderSourcePickerViewController.swift
+++ b/suixinkan/UI/Orders/OrderSourcePickerViewController.swift
@@ -15,7 +15,6 @@ final class OrderSourcePickerViewController: UIViewController, UITableViewDataSo
     private let loadLeads: (OrderSourcePerson) async -> Void
     private let onLeadBound: (OrderSourceSelection) -> Void
     private let onCallPhone: (String) -> Void
-    private let onPreviewImages: ([String], Int) -> Void
 
     private let titleLabel = UILabel()
     private let subtitleLabel = UILabel()
@@ -29,8 +28,7 @@ final class OrderSourcePickerViewController: UIViewController, UITableViewDataSo
         referralOrder: BoundReferralOrderEntity?,
         loadLeads: @escaping (OrderSourcePerson) async -> Void,
         onLeadBound: @escaping (OrderSourceSelection) -> Void,
-        onCallPhone: @escaping (String) -> Void,
-        onPreviewImages: @escaping ([String], Int) -> Void
+        onCallPhone: @escaping (String) -> Void
     ) {
         self.orderNumber = orderNumber
         self.viewModel = viewModel
@@ -38,7 +36,6 @@ final class OrderSourcePickerViewController: UIViewController, UITableViewDataSo
         self.loadLeads = loadLeads
         self.onLeadBound = onLeadBound
         self.onCallPhone = onCallPhone
-        self.onPreviewImages = onPreviewImages
         super.init(nibName: nil, bundle: nil)
     }
 
@@ -157,8 +154,7 @@ final class OrderSourcePickerViewController: UIViewController, UITableViewDataSo
             referralOrder: referralOrder,
             loadLeads: loadLeads,
             onLeadBound: onLeadBound,
-            onCallPhone: onCallPhone,
-            onPreviewImages: onPreviewImages
+            onCallPhone: onCallPhone
         )
         navigationController?.setNavigationBarHidden(false, animated: true)
         navigationController?.pushViewController(leadController, animated: true)
diff --git a/suixinkan/UI/Orders/OrdersViewController.swift b/suixinkan/UI/Orders/OrdersViewController.swift
index 7b3877f..87db859 100644
--- a/suixinkan/UI/Orders/OrdersViewController.swift
+++ b/suixinkan/UI/Orders/OrdersViewController.swift
@@ -377,7 +377,7 @@ final class OrdersViewController: BaseViewController, UITableViewDataSource, UIT
             self?.presentOrderSourcePicker(for: order)
         }
         actions.onOrderSourceImageTap = { [weak self] images, index in
-            self?.presentImagePreview(images: images, startIndex: index)
+            self?.presentImagePreview(imageURLs: images, startIndex: index)
         }
         if let travel = order.photoTravel, travel.canGiftRetouch {
             actions.onSendGift = { [weak self] in
@@ -492,9 +492,6 @@ final class OrdersViewController: BaseViewController, UITableViewDataSource, UIT
                     },
                     onCallPhone: { [weak self] phone in
                         self?.callPhone(phone)
-                    },
-                    onPreviewImages: { [weak self] urls, index in
-                        self?.presentImagePreview(images: urls, startIndex: index)
                     }
                 )
                 self.orderSourcePicker = controller
@@ -524,9 +521,4 @@ final class OrdersViewController: BaseViewController, UITableViewDataSource, UIT
         guard !trimmed.isEmpty, let url = URL(string: "tel://\(trimmed)") else { return }
         UIApplication.shared.open(url)
     }
-
-    private func presentImagePreview(images: [String], startIndex: Int) {
-        guard !images.isEmpty else { return }
-        present(ImagePreviewViewController(imageURLs: images, startIndex: startIndex), animated: true)
-    }
 }