Merge branch '2.x' into dev

src/checkbox/README.md

@@ -225,7 +225,7 @@ export default {
 ### Checkbox Props
 
 | Attribute | Description | Type | Default |
-| --- | --- | --- | --- |
+| --- | --- | --- | --- | --- |
 | v-model (value) | Check status | _boolean_ | `false` |
 | name | Checkbox name | _any_ | - |
 | shape | Can be set to `square` | _string_ | `round` |
@@ -239,7 +239,7 @@ export default {
 ### CheckboxGroup Props
 
 | Attribute | Description | Type | Default |
-| --- | --- | --- | --- |
+| --- | --- | --- | --- | --- |
 | v-model (value) | Names of all checked checkboxes | _any[]_ | - |
 | disabled | Whether to disable all checkboxes | _boolean_ | `false` |
 | max | Maximum amount of checked options | _number \| string_ | `0`(Unlimited) |
@@ -282,3 +282,19 @@ Use [ref](https://v3.vuejs.org/guide/component-template-refs.html) to get Checkb
 | Name   | Description         | Attribute           | Return value |
 | ------ | ------------------- | ------------------- | ------------ |
 | toggle | Toggle check status | _checked?: boolean_ | -            |
+
+### Less Variables
+
+How to use: [Custom Theme](#/en-US/theme).
+
+| Name | Default Value | Description |
+| --- | --- | --- |
+| @checkbox-size | `20px` | - |
+| @checkbox-border-color | `@gray-5` | - |
+| @checkbox-transition-duration | `@animation-duration-fast` | - |
+| @checkbox-label-margin | `@padding-xs` | - |
+| @checkbox-label-color | `@text-color` | - |
+| @checkbox-checked-icon-color | `@blue` | - |
+| @checkbox-disabled-icon-color | `@gray-5` | - |
+| @checkbox-disabled-label-color | `@gray-5` | - |
+| @checkbox-disabled-background-color | `@border-color` | - |

src/checkbox/README.zh-CN.md

@@ -306,3 +306,19 @@ export default {
 | 方法名 | 说明 | 参数 | 返回值 |
 | --- | --- | --- | --- |
 | toggle | 切换选中状态，传`true`为选中，`false`为取消选中，不传参为取反 | _checked?: boolean_ | - |
+
+### 样式变量
+
+组件提供了下列 Less 变量，可用于自定义样式，使用方法请参考[主题定制](#/zh-CN/theme)。
+
+| 名称                                | 默认值                     | 描述 |
+| ----------------------------------- | -------------------------- | ---- |
+| @checkbox-size                      | `20px`                     | -    |
+| @checkbox-border-color              | `@gray-5`                  | -    |
+| @checkbox-transition-duration       | `@animation-duration-fast` | -    |
+| @checkbox-label-margin              | `@padding-xs`              | -    |
+| @checkbox-label-color               | `@text-color`              | -    |
+| @checkbox-checked-icon-color        | `@blue`                    | -    |
+| @checkbox-disabled-icon-color       | `@gray-5`                  | -    |
+| @checkbox-disabled-label-color      | `@gray-5`                  | -    |
+| @checkbox-disabled-background-color | `@border-color`            | -    |