diff --git a/app/Http/Controllers/Business/Pages.php b/app/Http/Controllers/Business/Pages.php
index d0b503a3..45eab080 100644
--- a/app/Http/Controllers/Business/Pages.php
+++ b/app/Http/Controllers/Business/Pages.php
@@ -163,6 +163,16 @@ class Pages extends Controller
         ));
     }
 
+    public function installationDetails(string $guid)
+    {
+        $payload = $this->installationDetails->details($guid);
+        if (! $payload['ready']) {
+            return response()->json(['message' => '安装明细镜像尚未完成首次同步'], 503);
+        }
+
+        return response()->json(['data' => $payload['data']]);
+    }
+
     protected function viewData(
         array $section,
         ?array $page = null,
diff --git a/modules/EcommerceFinance/Repositories/InstallationDetailMirrorRepository.php b/modules/EcommerceFinance/Repositories/InstallationDetailMirrorRepository.php
index 2c7381df..725a5acc 100644
--- a/modules/EcommerceFinance/Repositories/InstallationDetailMirrorRepository.php
+++ b/modules/EcommerceFinance/Repositories/InstallationDetailMirrorRepository.php
@@ -29,17 +29,46 @@ class InstallationDetailMirrorRepository
         }
 
         $perPage = min(max($perPage, 1), 100);
+        // 主视图按商品行展开，同一安装单会出现多行；主表只保留每个
+        // SourceGuid 的最新 Id，商品行通过 details() 单独展开。
+        $latest = $connection->table($dataset->targetTable())
+            ->selectRaw('MAX(Id) AS id')
+            ->groupBy('SourceGuid');
         $query = $connection->table($dataset->targetTable() . ' AS v')
-            ->leftJoin($items->targetTable() . ' AS i', 'i.guid', '=', 'v.SourceGuid')
-            ->select(['v.*', 'i.Id AS detail_id', 'i.guid AS detail_guid', 'i.shopproid', 'i.Spu', 'i.shopskucode',
-                'i.proCode', 'i.barCode', 'i.skuName', 'i.scmname', 'i.applyItemAmount', 'i.installcount',
-                'i.settleItemAmount', 'i.acceptItemAmount', 'i.remark', 'i.createTime AS item_created_at', 'i.modifyTime AS item_modified_at']);
+            ->joinSub($latest, 'latest', static fn ($join) => $join->on('latest.id', '=', 'v.Id'))
+            ->select('v.*');
         $total = (clone $query)->count();
-        $rows = $query->orderByDesc('v.Id')->orderByDesc('i.Id')->forPage(max($page, 1), $perPage)->get();
+        $rows = $query->orderByDesc('v.Id')->forPage(max($page, 1), $perPage)->get();
 
         return ['data' => $rows->map(fn (object $row): array => $this->map((array) $row))->all(), 'total' => $total, 'ready' => true];
     }
 
+    /** @return array{data:list<array<string,mixed>>,ready:bool} */
+    public function details(string $guid): array
+    {
+        $dataset = $this->datasets->get(self::DATASET);
+        $items = $this->datasets->get(self::ITEM_DATASET);
+        $connection = $this->mirror->connection();
+        if (! $this->ready($dataset, $items, $connection->getName())) {
+            return ['data' => [], 'ready' => false];
+        }
+
+        $mainExists = $connection->table($dataset->targetTable())
+            ->where('SourceGuid', $guid)
+            ->exists();
+        if (! $mainExists) {
+            return ['data' => [], 'ready' => true];
+        }
+
+        $rows = $connection->table($items->targetTable())
+            ->where('guid', $guid)
+            ->orderBy('Id')
+            ->limit(100)
+            ->get();
+
+        return ['data' => $rows->map(fn (object $row): array => $this->mapItem((array) $row))->all(), 'ready' => true];
+    }
+
     private function ready($dataset, $items, string $connection): bool
     {
         return $this->mirror->ready($dataset) && $this->mirror->ready($items)
@@ -55,7 +84,13 @@ class InstallationDetailMirrorRepository
         if (! $this->mirror->ready($dataset) || ! Schema::connection($connection->getName())->hasTable($dataset->targetTable())) {
             return ['rows' => 0, 'requested' => 0.0, 'settled' => 0.0, 'paid' => 0.0];
         }
-        $row = $connection->table($dataset->targetTable())->selectRaw('COUNT(*) AS row_count, COALESCE(SUM(installcost),0) AS requested, COALESCE(SUM(settleAmount),0) AS settled, COALESCE(SUM(acceptAmount),0) AS paid')->first();
+        $latest = $connection->table($dataset->targetTable())
+            ->selectRaw('MAX(Id) AS id')
+            ->groupBy('SourceGuid');
+        $row = $connection->table($dataset->targetTable() . ' AS v')
+            ->joinSub($latest, 'latest', static fn ($join) => $join->on('latest.id', '=', 'v.Id'))
+            ->selectRaw('COUNT(*) AS row_count, COALESCE(SUM(v.installcost),0) AS requested, COALESCE(SUM(v.settleAmount),0) AS settled, COALESCE(SUM(v.acceptAmount),0) AS paid')
+            ->first();
         return ['rows' => (int) $row->row_count, 'requested' => (float) $row->requested, 'settled' => (float) $row->settled, 'paid' => (float) $row->paid];
     }
 
@@ -104,6 +139,43 @@ class InstallationDetailMirrorRepository
         return array_replace(array_fill_keys(array_keys(\App\Models\Business\InstallationDetail::columnLabels()), null), $mapped);
     }
 
+    /** @param array<string,mixed> $row */
+    private function mapItem(array $row): array
+    {
+        $value = static function (array $row, string ...$names): mixed {
+            foreach ($names as $name) {
+                foreach ($row as $key => $value) {
+                    if (strcasecmp((string) $key, $name) === 0) {
+                        return $value;
+                    }
+                }
+            }
+            return null;
+        };
+
+        return [
+            'transaction_no' => $value($row, 'orderNum', 'ordernum'),
+            'product_id' => $value($row, 'shopproid'),
+            'id_owner' => $value($row, 'id_owner', 'idOwner'),
+            'department_owner' => $value($row, 'department_owner', 'departmentOwner'),
+            'auxiliary_spu' => $value($row, 'Spu'),
+            'product_store_code' => $value($row, 'shopskucode'),
+            'item_no' => $value($row, 'proCode'),
+            'barcode' => $value($row, 'barCode'),
+            'product_name' => $value($row, 'skuName'),
+            'supplier_name' => $value($row, 'scmname'),
+            'detail_requested_amount' => $value($row, 'applyItemAmount'),
+            'detail_requested_quantity' => $value($row, 'installcount'),
+            'detail_settled_amount' => $value($row, 'settleItemAmount'),
+            'detail_received_amount' => $value($row, 'acceptItemAmount'),
+            'installation_company' => $value($row, 'installCompanyName'),
+            'available' => $value($row, 'isAvailable', 'available'),
+            'quote' => $value($row, 'quote'),
+            'quote_owner' => $value($row, 'quoteOwner'),
+            'quote_time' => $value($row, 'quoteTime'),
+        ];
+    }
+
     private function yesNo(mixed $value): ?string
     {
         return $value === null ? null : ((int) $value === 1 ? '是' : '否');
diff --git a/resources/views/business/pages/show.blade.php b/resources/views/business/pages/show.blade.php
index 98ceb45e..e4d401c5 100644
--- a/resources/views/business/pages/show.blade.php
+++ b/resources/views/business/pages/show.blade.php
@@ -200,6 +200,52 @@
                 background: #f9fafb;
             }
 
+            .installation-expand {
+                width: 2rem;
+                height: 2rem;
+                padding: 0;
+                border: 1px solid #d8d2c7;
+                border-radius: 0.375rem;
+                background: #ffffff;
+                color: #856632;
+                cursor: pointer;
+            }
+
+            .installation-detail-row td {
+                padding: 0.75rem 1rem 1rem 3rem;
+                background: #fbfaf7;
+            }
+
+            .installation-detail-table {
+                width: 100%;
+                border-collapse: collapse;
+                font-size: 0.75rem;
+            }
+
+            .installation-detail-table th,
+            .installation-detail-table td {
+                padding: 0.45rem 0.65rem;
+                border: 1px solid #e5e0d7;
+                white-space: nowrap;
+                text-align: left;
+            }
+
+            .installation-detail-table th {
+                background: #f3efe6;
+                color: #595959;
+                font-weight: 600;
+            }
+
+            .installation-detail-empty,
+            .installation-detail-error {
+                color: #595959;
+                padding: 0.5rem 0;
+            }
+
+            .installation-detail-error {
+                color: #b80000;
+            }
+
             .biz-table .num {
                 text-align: right;
                 font-variant-numeric: tabular-nums;
@@ -545,8 +591,15 @@
                             </thead>
                             <tbody>
                                 @forelse ($rows as $row)
-                                    <tr>
-                                        <td>{{ $row->id }}</td>
+                                    <tr data-installation-row data-guid="{{ $row->related_guid }}">
+                                        <td>
+                                            @if ($page['slug'] === 'installation-details' && $row->related_guid)
+                                                <button type="button" class="installation-expand" data-installation-expand aria-expanded="false" title="查看安装商品明细">
+                                                    <span class="material-icons-outlined" style="font-size:1rem">chevron_right</span>
+                                                </button>
+                                            @endif
+                                            {{ $row->id }}
+                                        </td>
                                         @foreach ($descriptor->fields as $field)
                                             @php
                                                 $val = $row->{$field['name']};
@@ -601,6 +654,59 @@
                         </table>
                     </div>
 
+                    @if ($page['slug'] === 'installation-details')
+                        <script>
+                            (() => {
+                                const detailUrl = @json(route('business.installation-details.details', ['guid' => '__GUID__']));
+                                const columns = [
+                                    ['transaction_no', '交易单号'], ['product_id', '商品id'], ['id_owner', 'ID负责人'],
+                                    ['department_owner', '部门负责人'], ['auxiliary_spu', '辅助码Spu'], ['product_store_code', '商品店铺编码'],
+                                    ['item_no', '货号'], ['barcode', '条形码'], ['product_name', '商品名称'], ['supplier_name', '供应商名称'],
+                                    ['detail_requested_amount', '申请明细金额'], ['detail_requested_quantity', '申请明细数量'],
+                                    ['detail_settled_amount', '结算明细金额'], ['detail_received_amount', '收款明细金额'],
+                                    ['installation_company', '安装公司'], ['available', '是否可用'], ['quote', '报价'],
+                                    ['quote_owner', '报价人'], ['quote_time', '报价时间'],
+                                ];
+                                const escapeHtml = (value) => String(value ?? '').replace(/[&<>"']/g, (char) => ({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#039;'}[char]));
+                                const renderDetails = (items) => {
+                                    if (!items.length) return '<div class="installation-detail-empty">暂无商品明细</div>';
+                                    const head = columns.map(([, label]) => `<th>${escapeHtml(label)}</th>`).join('');
+                                    const body = items.map((item) => `<tr>${columns.map(([key]) => `<td>${escapeHtml(item[key])}</td>`).join('')}</tr>`).join('');
+                                    return `<table class="installation-detail-table"><thead><tr>${head}</tr></thead><tbody>${body}</tbody></table>`;
+                                };
+                                document.querySelectorAll('[data-installation-expand]').forEach((button) => {
+                                    button.addEventListener('click', async () => {
+                                        const row = button.closest('[data-installation-row]');
+                                        const existing = row.nextElementSibling;
+                                        if (existing?.matches('.installation-detail-row')) {
+                                            existing.hidden = !existing.hidden;
+                                            button.setAttribute('aria-expanded', String(!existing.hidden));
+                                            button.querySelector('.material-icons-outlined').textContent = existing.hidden ? 'chevron_right' : 'expand_more';
+                                            return;
+                                        }
+                                        const detailRow = document.createElement('tr');
+                                        detailRow.className = 'installation-detail-row';
+                                        detailRow.innerHTML = `<td colspan="{{ count($descriptor->fields) + 1 }}"><div>正在加载明细…</div></td>`;
+                                        row.after(detailRow);
+                                        button.disabled = true;
+                                        try {
+                                            const response = await fetch(detailUrl.replace('__GUID__', encodeURIComponent(row.dataset.guid)), {headers: {'Accept': 'application/json'}});
+                                            if (!response.ok) throw new Error('明细加载失败');
+                                            const payload = await response.json();
+                                            detailRow.firstElementChild.innerHTML = renderDetails(payload.data || []);
+                                            button.setAttribute('aria-expanded', 'true');
+                                            button.querySelector('.material-icons-outlined').textContent = 'expand_more';
+                                        } catch (error) {
+                                            detailRow.firstElementChild.innerHTML = '<div class="installation-detail-error">明细加载失败，请稍后重试</div>';
+                                        } finally {
+                                            button.disabled = false;
+                                        }
+                                    });
+                                });
+                            })();
+                        </script>
+                    @endif
+
                     <div class="biz-pagination">
                         <span>共 {{ $rows->total() }} 条 · 第 {{ $rows->currentPage() }} / {{ $rows->lastPage() }} 页</span>
                         <span>
diff --git a/routes/admin.php b/routes/admin.php
index 58ced581..0f90eecb 100644
--- a/routes/admin.php
+++ b/routes/admin.php
@@ -117,6 +117,10 @@ Route::get('workspace/courier-payables/courier-information/export', 'Business\Pa
 Route::get('workspace/{section}/{page}/{tab}/export', 'Business\Pages@export')
     ->name('business.pages.export');
 
+Route::get('workspace/financial-operations/installation-details/details/{guid}', 'Business\Pages@installationDetails')
+    ->where('guid', '[A-Za-z0-9-]+')
+    ->name('business.installation-details.details');
+
 Route::get('workspace/{section}/{page?}/{tab?}', 'Business\Pages@show')
     ->name('business.pages.show');
 
diff --git a/tests/Feature/Business/ManagementCrudTest.php b/tests/Feature/Business/ManagementCrudTest.php
index 129825fa..e1ecfc54 100644
--- a/tests/Feature/Business/ManagementCrudTest.php
+++ b/tests/Feature/Business/ManagementCrudTest.php
@@ -29,6 +29,7 @@ class ManagementCrudTest extends FeatureTestCase
             'ready' => true, 'total' => 1, 'data' => [array_replace(array_fill_keys(array_keys(InstallationDetail::columnLabels()), null), [
                 'id' => 1, 'installation_no' => 'INSTALL-TEST-001', 'installation_company' => '测试安装公司',
                 'store_name' => '测试店铺', 'requested_amount' => '120.50', 'settled_amount' => '100.00', 'item_quantity' => 2,
+                'related_guid' => 'guid-install-test',
             ])],
         ]);
         $mirror->shouldReceive('summary')->once()->andReturn(['rows' => 1, 'requested' => 120.50, 'settled' => 100.00, 'paid' => 0.0]);
@@ -50,6 +51,28 @@ class ManagementCrudTest extends FeatureTestCase
             ->assertSeeText('共 1 条');
     }
 
+    public function testInstallationDetailsEndpointReturnsChildItemsForMainRecord(): void
+    {
+        $mirror = Mockery::mock(InstallationDetailMirrorRepository::class);
+        $mirror->shouldReceive('details')->once()->with('guid-install-test')->andReturn([
+            'ready' => true,
+            'data' => [[
+                'transaction_no' => 'INSTALL-TEST-001',
+                'product_id' => '10035070813217',
+                'product_name' => '测试商品',
+                'detail_requested_amount' => '53.59',
+                'detail_requested_quantity' => 1,
+            ]],
+        ]);
+        $this->app->instance(InstallationDetailMirrorRepository::class, $mirror);
+
+        $this->loginAs()
+            ->get(route('business.installation-details.details', ['guid' => 'guid-install-test']))
+            ->assertOk()
+            ->assertJsonPath('data.0.transaction_no', 'INSTALL-TEST-001')
+            ->assertJsonPath('data.0.product_name', '测试商品');
+    }
+
     public function testCompanyInformationUsesWorkbookHeadersAndReadOnlyUpstreamRows(): void
     {
         $this->mockUpstreamPage((object) [