feat: 更新产品类型和内容，优化产品展示功能

- 重构产品类型定义，新增desc、models、content字段
- 更新所有语言的产品内容，包括详细规格和化学/机械性能
- 修改产品展示组件，支持MDX内容渲染和模型列表展示
- 调整产品详情页布局，优化信息展示方式
- 更新i18n翻译文件，同步产品名称变更
- 修改默认主题配置为light模式
- 修复公司简介中的格式问题

content/product/en/1.mdx

@@ -1,15 +1,37 @@
 ---
-title: Hot-dip Galvanized Steel
-model: DX51D/DX52D/DX53D/S220GD/S250GD/S280GD/S320GD/S320GD/S350GD
+title: Zinc-Aluminum-Magnesium Coated Steel Sheet
+desc: Zinc-Aluminum-Magnesium is a new type of high corrosion resistance coated steel sheet, mainly composed of zinc, plus aluminum, magnesium and trace silicon. Used in construction, home appliances, automotive and other industries.
+models: 
+  - GB/T 38935-2020: Q235
+  - EN10346-2015: DX51D, S350GD
 place: Jiaxiang Kelunpu Heavy Industry Co., Ltd.
 publishedTime: 2023-08-01
 images: 
   - http://kelunpuzhonggong.com/upload/20251102082125.jpg
 detail: Textured/Non-textured
 spec: 
-  - 'Nominal thickness: 0.6-6.0'
-  - 'Nominal width: 800-1250'
-  - 'Inner diameter of steel coil: 610'
+  - 'Thickness: 0.7~6.0mm'
+  - 'Width: 1000~1350mm'
 packaging: Single coil
-slug: 1
----
+slug: '1'
+---
+
+## Chemical Composition
+
+| Grade | C | Mn | Si | P | S |
+| --- | --- | --- | --- | --- | --- |
+| Q235 | ≤0.22 | ≤1.40 | ≤0.35 | ≤0.035 | ≤0.035 |
+| DX51D | ≤0.18 | ≤1.20 | ≤0.5 | ≤0.12 | ≤0.045 |
+| Q235 | ≤0.2 | ≤1.70 | ≤0.6 | ≤0.045 | ≤0.045 |
+
+## Mechanical Properties
+
+| Grade | Yield Strength | Tensile Strength | Elongation After Fracture | Rockwell Hardness | Bending Test |
+| --- | --- | --- | --- | --- | --- |
+| Q235 | ≥235 | 370-500 | ≥22 | - | d = 1a |
+| DX51D | ≥270 | ≥290 | ≥26 | - | d = 0.5a |
+| S350GD | ≥350 | ≥420 | ≥16 | - | - |
+
+1. When there is no obvious yield, use RP0.2, otherwise use ReL.
+2. Sample width B ≥ 20mm, B = 20mm for arbitration; a is sample thickness.
+3. Tensile test and bending test take transverse sampling.