<div class="text-image">
  <p>コース診断</p>
</div>
.text-image {
  background-image: url("https://assets.techacademy.jp/assets/top-pickup-190819-5f692f095f4f20a3863f4d841dd29c50a99faff1ea35f8fdd6717fd0f11216ec.jpg");
  background-size: 450px 180px;
  width: 450px;
  height: 180px;
}

.text-image p {
  text-indent: -9999px;
}

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