JSFiddle - React, Tailwind, and code Playground

HTML

<header>
    <div class="header_top">
      <a class="svg_header_logo" href="{{url('/')}}">あ</a>
      <p>テスト</p>
    </div>
    <div class="vets_number">
      <p>医院TEL<a>000-0000</a></p>
    </div>
    <div>
      <p>@yield('heading')</p>
    </div>
  </header>

CSS

.header_top {
  text-align:center;
  background-color:orange;
}
.header_top a {
  background-image:url(https://placehold.jp/24/cc9999/993333/350x150.png);
}