docs: add english design document (#8814)

docs/markdown/design.en-US.md

@@ -0,0 +1,60 @@
+# Design Resource
+
+### Intro
+
+You can download Vant's design resources here.
+
+## Resources
+
+### Components (Sketch)
+
+Contains color specifications, font specifications, and component design specifications.
+
+#### Colors
+
+<img src="https://img.yzcdn.cn/vant/color_202009101415.png" style="width: 80%; box-shadow: 0 1px 2px rgba(0,0,0,.2)">
+
+#### Fonts
+
+<img src="https://img.yzcdn.cn/vant/words_202009101415.png" style="width: 80%; box-shadow: 0 1px 2px rgba(0,0,0,.2)">
+
+#### Components
+
+<img src="https://img.yzcdn.cn/vant/tab_202009101415.png" style="width: 80%; box-shadow: 0 1px 2px rgba(0,0,0,.2)">
+
+<a class="design-download" href="https://github.com/youzan/vant/blob/dev/docs/assets/design.sketch?raw=true">Download</a>
+
+### Icons (Sketch)
+
+Contains icon library resources.
+
+<img src="https://img.yzcdn.cn/vant/design-icons-0321.png" style="width: 80%; box-shadow: 0 1px 2px rgba(0,0,0,.2)">
+
+<a class="design-download" href="https://github.com/youzan/vant/blob/dev/packages/vant-icons/assets/icons.sketch?raw=true">Download</a>
+
+### Axure
+
+<img src="https://img.yzcdn.cn/vant/vant-axure-0905.png" style="width: 80%; box-shadow: 0 1px 2px rgba(0,0,0,.2)">
+
+<a class="design-download" href="https://b.yzcdn.cn/vant/vant-axure-20200905.zip">Download</a>
+
+<style>
+a.design-download {
+  display: inline-block;
+  width: 100px;
+  color: #fff !important;
+  line-height: 40px;
+  text-align: center;
+  background-color: #38f;
+  border-radius: 3px;
+}
+
+a.design-download:hover {
+  color: #fff;
+  opacity: .9;
+}
+
+a.design-download:active {
+  opacity: .7;
+}
+</style>

docs/markdown/home.zh-CN.md

@@ -27,7 +27,7 @@ Vant 是**有赞前端团队**开源的移动端组件库，于 2017 年开源
 
 ### 快速上手
 
-请参考[快速上手](#/zh-CN/quickstart)章节。
+请阅读[快速上手](#/zh-CN/quickstart)章节，通过该章节你可以了解到 Vant 的安装方法和基本使用姿势。
 
 ### 贡献代码