You can add additional styles：

.art-subtitle p {
  background: rgb(0 0 0 / 50%);
}

Hi, seem like the background dispplay following the full size of player.

Possible background just focus following the subtitle area?

What is your artplayer version?

What is your artplayer version?

5.0.9

My test here is fine.

https://codesandbox.io/s/eager-glade-5n5r43?file=/src/index.mjs

My test here is fine.

https://codesandbox.io/s/eager-glade-5n5r43?file=/src/index.mjs

Could you check my code, is there something wrong?

This applying the style to the subtitle container, not the subtitle row. This is different.

This applying the style to the subtitle container, not the subtitle row. This is different.

This is my full code, may i know where should i put those code?

https://pastebin.com/hW9tcrLq

https://codesandbox.io/s/eager-glade-5n5r43?file=/src/index.mjs

Add the style in your own css file

It doesn't work if we put "escape: false"

Yes, when "escape: false" is set, ".art-subtitle p" will be invalid. At this time, the style of the subtitle line cannot be modified unless your subtitle file has tags:

1
00:00:00,306 --> 00:00:00,844
<p>那一天</p>
<p>あの日</p>