JSFiddle - React, Tailwind, and code Playground

HTML

<!doctype html>
<meta charset="utf-8">
<title>Блок №2</title>
<div class="b1">
    <div>
        Рабочий эскиз
    </div>
</div>

CSS

body { background: #fff; font: .75em/1.333 sans-serif; margin: 0; padding: 0; }
.b1 { border: solid #888; border-width: 0 1px; margin: 1em 2em; padding: 12px 0; }
.b1>div { border: solid #888; border-width: 1px 0; padding: 1em 2em ; margin: 0 -12px; }