Adding double quotes to a paragraph with CSS

.myclass:before
{
content: '\201C';
}

.myclass:after
{
content: '\201D';
}

Actually, the accepted answer is wrong, or at least suboptimal. It should be:

q { quotes: '\201c' '\201d'; }
q:before { content: open-quote; }
q:after  { content: close-quote; }

The \201c here is Unicode for a left curly double quote. There's no reason you could not write the double quotes directly in the rule for q:

q { quotes: '“' '”'}

open-quote and close-quote are special values for the content property, which refer to the strings given as values for the quotes property.

Now you can just say:

<p><q>This is my paragraph</q></p>

Or some variant thereof; you could of course add the before and after rules directly on p if you would prefer:

body { quotes: '\201c' '\201d'; }
p:before { content: open-quote; }
p:after  { content: close-quote; }

This permits you to factor out the specific characters used for quotes using the quotes property, without changing all the before and after rules. For instance, you can then do things such as

:lang(de) { quotes: "»" "«"; }

to get German-style quotes, if the lang attribute has been set to de on any ancestor.

The quotes property actually allows you to specify additional sets of quotes, for use with nested quotes. See the docs for more details.

body { quotes: '\201c' '\201d'; }
q:before { content: open-quote; }
q:after  { content: close-quote; }

:lang(de) { quotes: "»" "«"; }

<p>Quoth the raven, <q>Never more.</q></p>

<p lang="de">Sprach der Rabe: <q>Nie du Tor.</q></p>

References:

• quotes property
• :lang pseudo-class
• content property, with open-quote and close-quote values
• q element for quoted strings