diff --git a/openspec/changes/update-device-batch-import-contract/proposal.md b/openspec/changes/update-device-batch-import-contract/proposal.md
new file mode 100644
index 0000000..a6cc64f
--- /dev/null
+++ b/openspec/changes/update-device-batch-import-contract/proposal.md
@@ -0,0 +1,24 @@
+# Change: 更新设备导入模板新增 SN 列
+
+## Why
+
+设备批量导入模板有一处明确变更：在必填 `virtual_no` 后新增一个非必填 `sn` 列。
+
+如果后台继续分发旧模板，运营按旧列顺序填表时会与最新模板不一致，影响设备导入使用。
+
+本提案只覆盖这一个变化，不引入其他接口、流程、默认值或交互行为调整。
+
+## What Changes
+
+- 更新设备任务页使用的 `设备导入模板.xlsx`，在 `virtual_no` 后新增可选 `sn` 列
+- 更新设备任务页“批量导入设备”弹窗说明文案，明确 `sn` 为新增的可选列
+
+## Impact
+
+- Affected specs:
+  - `device-batch-import`
+- Affected code:
+  - `src/template/设备导入模板.xlsx`
+  - `src/views/asset-management/task-management/device-task/index.vue`
+- Breaking changes:
+  - 无接口层 breaking change
diff --git a/openspec/changes/update-device-batch-import-contract/specs/device-batch-import/spec.md b/openspec/changes/update-device-batch-import-contract/specs/device-batch-import/spec.md
new file mode 100644
index 0000000..6987d4c
--- /dev/null
+++ b/openspec/changes/update-device-batch-import-contract/specs/device-batch-import/spec.md
@@ -0,0 +1,21 @@
+# Device Batch Import Specification
+
+## ADDED Requirements
+
+### Requirement: Admin device import template includes optional sn after virtual_no
+
+The admin device import template SHALL insert an optional `sn` column immediately after required `virtual_no`.
+
+#### Scenario: Download the latest device import template
+
+- **GIVEN** a platform user opens the "批量导入设备" dialog
+- **WHEN** the user clicks "下载导入模板"
+- **THEN** the downloaded template MUST include `virtual_no` as the first column
+- **AND** the downloaded template MUST include `sn` as the second column
+- **AND** `sn` MUST be optional
+
+#### Scenario: Import dialog documents the new sn column
+
+- **GIVEN** a platform user opens the "批量导入设备" dialog
+- **WHEN** the import instructions are displayed
+- **THEN** the page MUST indicate that `sn` is an optional column in the device import template
diff --git a/openspec/changes/update-device-batch-import-contract/tasks.md b/openspec/changes/update-device-batch-import-contract/tasks.md
new file mode 100644
index 0000000..7313cfa
--- /dev/null
+++ b/openspec/changes/update-device-batch-import-contract/tasks.md
@@ -0,0 +1,5 @@
+## 1. Implementation
+
+- [x] 1.1 更新 `src/template/设备导入模板.xlsx`，在 `virtual_no` 后新增 `sn` 列
+- [x] 1.2 更新设备任务页导入弹窗文案，明确 `sn` 是新增的非必填列
+- [x] 1.3 验证模板首行列顺序包含新增 `sn` 列
diff --git a/src/template/设备导入模板.xlsx b/src/template/设备导入模板.xlsx
index 48b209e..296624a 100644
Binary files a/src/template/设备导入模板.xlsx and b/src/template/设备导入模板.xlsx differ
diff --git a/src/views/asset-management/asset-information/components/OperationLogsCard.vue b/src/views/asset-management/asset-information/components/OperationLogsCard.vue
index 47d0045..effb96b 100644
--- a/src/views/asset-management/asset-information/components/OperationLogsCard.vue
+++ b/src/views/asset-management/asset-information/components/OperationLogsCard.vue
@@ -637,7 +637,7 @@
 
           .change-item {
             display: flex;
-            align-items: flex-start;
+            align-items: center;
             gap: 4px;
             font-size: 12px;
 
diff --git a/src/views/asset-management/task-management/device-task/index.vue b/src/views/asset-management/task-management/device-task/index.vue
index 92782e7..5eeabef 100644
--- a/src/views/asset-management/task-management/device-task/index.vue
+++ b/src/views/asset-management/task-management/device-task/index.vue
@@ -62,11 +62,11 @@
             <p>3. 列格式请设置为文本格式，避免长数字被转为科学计数法</p>
             <p>4. <strong>重要：列顺序固定，不可调整。</strong>系统按位置读取，不识别列名</p>
             <p style="color: var(--el-color-primary)">5. 必填列：虚拟号（第1列）</p>
-            <p
-              >6.
-              可选列：设备名称、设备型号、设备类型、IMEI、制造商、最大SIM槽数（默认4，有效范围1-4）、卡1~卡4
-              ICCID</p
-            >
+            <p>
+              6.
+              可选列：SN、设备名称、设备型号、设备类型、IMEI、制造商、最大SIM槽数（默认4，有效范围1-4）、卡1~卡4
+              ICCID
+            </p>
           </div>
         </template>
       </ElAlert>