Add a paragraph text under site title text

To add a paragraph text under Site title text on Squarespace, you can do this
#1. First, edit Footer and add a Text Block (or Markdown Block)

#2. Next, find Text ID, you can use Squarespace ID Finder tool
image

#3. Use code to Code Injection > Footer

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
    $('#block-yui_3_17_2_1_1722424478615_5378').appendTo('a#site-title');
});
</script>
<style>
a#site-title * {
    font-size: 14px;
}
a#site-title .html-block {
    max-width: 200px;
}
</style>

#4. Result