feat: 增加动态设置字幕偏移功能，更新相关文档

packages/artplayer-vitepress/docs/advanced/property.md

@@ -964,4 +964,27 @@ art.on('ready', () => {
         column: 10,
     };
 });
+```
+
+## `subtitleOffset`
+
+-   Type: `Setter/Getter`
+-   Parameter: `Number`
+
+动态设置字幕偏移
+
+<div className="run-code">▶ Run Code</div>
+
+```js
+var art = new Artplayer({
+	container: '.artplayer-app',
+	url: '/assets/sample/video.mp4',
+    subtitle: {
+        url: '/assets/sample/subtitle.srt',
+    },
+});
+
+art.on('ready', () => {
+    art.subtitleOffset = 1;
+});
 ```

packages/artplayer-vitepress/docs/en/advanced/property.md

@@ -948,4 +948,27 @@ art.on('ready', () => {
         column: 10,
     };
 });
+```
+
+## `subtitleOffset`
+
+-   Type: `Setter/Getter`
+-   Parameter: `Number`
+
+Dynamically set subtitle offset
+
+<div className="run-code">▶ Run Code</div>
+
+```js
+var art = new Artplayer({
+	container: '.artplayer-app',
+	url: '/assets/sample/video.mp4',
+    subtitle: {
+        url: '/assets/sample/subtitle.srt',
+    },
+});
+
+art.on('ready', () => {
+    art.subtitleOffset = 1;
+});
 ```

packages/artplayer-vitepress/docs/en/component/setting.md

@@ -23,7 +23,6 @@ var art = new Artplayer({
 | Property   | Type                | Description   |
 | ---------- | ------------------- | ------------  |
 | `html`     | `String`, `Element` | Element's DOM |
-
 | `icon`     | `String`, `Element` | 元素的图标   |
 | `selector` | `Array`             | 元素列表     |
 | `onSelect` | `Function`          | 元素点击事件 |

packages/artplayer/src/player/subtitleOffsetMix.js

@@ -10,7 +10,7 @@ export default function subtitleOffsetMix(art) {
         set(value) {
             const { cues } = art.subtitle;
             if (!template.$track || cues.length === 0) return;
-            const offset = clamp(value, -5, 5);
+            const offset = clamp(value, -10, 10);
             template.$track.offset = offset;
             for (let index = 0; index < cues.length; index++) {
                 const cue = cues[index];