How to attach styles to mail messages?

Question

css

Good afternoon.
Sending email messages using swift mailer. The problem is that it is not possible to apply styles to these messages. I looked at the documentation, but the examples are scarce.
Need a tip

Answer 1

Styles in email messages can only be inline. Those. through the attribute style=""
PS and "beer" is not necessary?)

Answer 2

hard, i.e. all the beautiful messages that come from different resources are made up of inline styles?!