diff --git a/backend/app/Model/Store.php b/backend/app/Model/Store.php
new file mode 100644
index 0000000..c132a5a
--- /dev/null
+++ b/backend/app/Model/Store.php
@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Model;
+
+use Hyperf\DbConnection\Model\Model;
+
+/**
+ * @property int $id 主键 - 来自远程 和 tools 保持一致
+ * @property int $company_id 店铺所属的公司 ID
+ * @property int $platform_id 平台 ID
+ * @property string $platform_store_id 平台店铺 ID
+ * @property int $warehouse_id 店铺使用的仓库 ID
+ * @property int $currency_id 店铺的本币 ID
+ * @property boolean $enabled 激活状态
+ * @property string $name 店铺名 英文
+ * @property string $label 店铺名 中文
+ * @property array $ext 扩展字段
+ * @property \Carbon\Carbon $created_at
+ * @property \Carbon\Carbon $updated_at
+ */
+class Store extends Model
+{
+    /**
+     * The table associated with the model.
+     */
+    protected ?string $table = 'stores';
+
+    /**
+     * Indicates if the IDs are auto-incrementing.
+     * 由于 ID 来自远程系统，禁用自增
+     */
+    public bool $incrementing = false;
+
+    /**
+     * The attributes that are mass assignable.
+     */
+    protected array $fillable = [
+        'id',
+        'company_id',
+        'platform_id',
+        'platform_store_id',
+        'warehouse_id',
+        'currency_id',
+        'enabled',
+        'name',
+        'label',
+        'ext',
+        'created_at',
+        'updated_at'
+    ];
+
+    /**
+     * The attributes that should be cast to native types.
+     */
+    protected array $casts = [
+        'id' => 'integer',
+        'company_id' => 'integer',
+        'platform_id' => 'integer',
+        'warehouse_id' => 'integer',
+        'currency_id' => 'integer',
+        'enabled' => 'boolean',
+        'ext' => 'array',
+        'created_at' => 'datetime',
+        'updated_at' => 'datetime',
+    ];
+}
diff --git a/backend/migrations/2025_11_10_073400_create_companies_table.php b/backend/migrations/2025_11_10_073400_create_companies_table.php
index 361e033..d0cb429 100644
--- a/backend/migrations/2025_11_10_073400_create_companies_table.php
+++ b/backend/migrations/2025_11_10_073400_create_companies_table.php
@@ -3,6 +3,7 @@
 use Hyperf\Database\Schema\Schema;
 use Hyperf\Database\Schema\Blueprint;
 use Hyperf\Database\Migrations\Migration;
+use Hyperf\DbConnection\Db;
 
 return new class extends Migration
 {
@@ -16,9 +17,17 @@ return new class extends Migration
             $table->string('name')->unique()->comment('公司名 英文');
             $table->string('label')->nullable()->default('null')->comment('公司名 中文');
             $table->boolean('enabled')->default('true')->comment('激活状态');
-            $table->text('ext')->default('null')->comment('额外信息');
+            $table->jsonb('ext')->nullable()->comment('额外信息');
             $table->timestampsTz();
+
+            // 索引
+            $table->index('enabled', 'idx_companies_enabled');
+            $table->index('created_at', 'idx_companies_created_at');
+            $table->index('updated_at', 'idx_companies_updated_at');
         });
+
+        // 为 JSONB 字段创建 GIN 索引，支持高效的 JSON 查询
+        Db::statement('CREATE INDEX idx_companies_ext ON companies USING GIN (ext)');
     }
 
     /**
diff --git a/backend/migrations/2025_11_13_050115_create_platforms_table.php b/backend/migrations/2025_11_13_050115_create_platforms_table.php
new file mode 100644
index 0000000..1217ab9
--- /dev/null
+++ b/backend/migrations/2025_11_13_050115_create_platforms_table.php
@@ -0,0 +1,74 @@
+<?php
+
+use Hyperf\Database\Schema\Schema;
+use Hyperf\Database\Schema\Blueprint;
+use Hyperf\Database\Migrations\Migration;
+use Carbon\Carbon;
+use Hyperf\DbConnection\Db;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        Schema::create('platforms', function (Blueprint $table) {
+            $table->integer('id')->primary()->comment('主键 - 平台 ID');
+            $table->string('name', 100)->unique()->comment('平台名称');
+            $table->string('label', 100)->nullable()->comment('平台名称 EN');
+            $table->boolean('enabled')->default(true)->comment('平台状态');
+
+            $table->timestampsTz();
+
+            // 索引
+            $table->index('name', 'idx_platforms_name');
+            $table->index('created_at', 'idx_platforms_created_at');
+            $table->index('updated_at', 'idx_platforms_updated_at');
+        });
+
+        // 填充初始数据
+        $platforms = [
+            ['id' => 1, 'name' => 'JD'],
+            ['id' => 2, 'name' => 'Tmall'],
+            ['id' => 3, 'name' => 'RedBook'],
+            ['id' => 4, 'name' => 'Rakuten'],
+            ['id' => 5, 'name' => 'Kaola'],
+            ['id' => 6, 'name' => 'PDD'],
+            ['id' => 7, 'name' => 'Wechat'],
+            ['id' => 9, 'name' => '1688'],
+            ['id' => 10, 'name' => 'ERP'],
+            ['id' => 11, 'name' => 'DeWu'],
+            ['id' => 17, 'name' => 'Amazon Japan'],
+            ['id' => 18, 'name' => 'LAZADA'],
+            ['id' => 19, 'name' => 'Shopify'],
+            ['id' => 20, 'name' => 'DouYin'],
+            ['id' => 21, 'name' => 'YouZan'],
+            ['id' => 22, 'name' => 'Yahoo Japan'],
+            ['id' => 23, 'name' => 'Coupang'],
+            ['id' => 24, 'name' => 'Offline'],
+            ['id' => 25, 'name' => 'Shopee'],
+            ['id' => 26, 'name' => 'Naver'],
+            ['id' => 27, 'name' => 'Wechat Video'],
+            ['id' => 28, 'name' => 'VIP'],
+            ['id' => 29, 'name' => 'Goofish'],
+        ];
+
+        foreach ($platforms as $platform) {
+            Db::table('platforms')->insert([
+                'id' => $platform['id'],
+                'name' => $platform['name'],
+                'created_at' => Carbon::now(),
+                'updated_at' => Carbon::now(),
+            ]);
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        Schema::dropIfExists('platforms');
+    }
+};