字幕的透明度无论调解成多少，都是100%，会‘遮挡到画面，不知道能不能解决一下，谢谢！有图

[zydchina818]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[zydchina818]

[ChenYCL]

62 目测是这个问题,参照下试试

[ChenYCL]

暂时先关了,如果未解决再reopen

[ChenYCL]

简单的演示关闭效果

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