<!DOCTYPE html>
<html lang="en"
      xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout"
      layout:decorator="default">
<head>
</head>
<body>

<div layout:fragment="content">

    <a href="./conference" style="
    top: 100px;
    position: absolute;
    width: 100px;
    height: 50px;
">нажать</a>
</div>

</body>
</html>