1. Place the "Fonts" folder and CSS file in your project's resource directory.
2. Link the CSS file in the `<head>` section of your HTML document. <head> ... <link rel="stylesheet" type="text/css" href="/assets/css/flaticon.css"> ... </head>
3. Add the corresponding icon class name to "display: inline" elements for seamless UI style unification. Example: <i class="flaticon-airplane49"></i> or <span class="flaticon-airplane49"></span>