/usr/share/doc/opencl-1.2-html-doc/style.css is in opencl-1.2-html-doc 1.0~svn27110-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | @import url("undohtml.css");
@import url("present.css");
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