I am reading a CSS basics book. The book claims that the inline element has full padding properties, but not margin-top / bottom properties, only margin-left / right properties .
My first question is: where can I find this as an official expression? I found here that if the stock-top / bottom is set to auto, then it is set to 0. But isn’t this different from the fact that margin-top / bottom does not apply to inline elements?
My second question is: does the inline element really have full padding properties? I tried the following example:

<!DOCTYPE html>
<html>
<head> </head>
<body>
<div style="margin: 20px; border: solid 20px;background: red;">
<p style="margin:0">
test test test test test test test test test test test test test test
test test test test test test test test test test
<strong style="padding:20px;background-color:yellow">hello</strong>
test test test test
</p>
</div>
</body>
</html>
, , - padding-top padding-bottom . ? - W3?