rgui-css-standard/src/message/demo/index.md

Regular UI - Standard CSS Components

## 示例
### 基本形式

<div class="m-example"></div>

```html
<div class="u-message">This is a message.</div>
```

### 颜色扩展

<div class="m-example"></div>

```html
<div class="u-message u-message-info"><i class="message_icon u-icon u-icon-info-circle"></i> Info</div>
<div class="u-message u-message-success"><i class="message_icon u-icon u-icon-success-circle"></i> Success</div>
<div class="u-message u-message-warning"><i class="message_icon u-icon u-icon-warning-circle"></i> Warning</div>
<div class="u-message u-message-error"><i class="message_icon u-icon u-icon-error-circle"></i> Error</div>
```