带有重叠图像和文本的html横幅

<div class="banner">
  <img src="banner-image.jpg" alt="横幅图像">
  <h2>重要通知</h2>
  <p>这是一条重要的消息。</p>
  <a href="https://example.com">了解更多</a>
</div>

.banner {
  position: relative;
  width: 100%;
  height: 200px;
}

.banner img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner h2, .banner p, .banner a {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #fff;
  text-align: center;
}

.banner h2 {
  font-size: 24px;
}

.banner p {
  font-size: 16px;
}

.banner a {
  font-size: 18px;
  background-color: #007bff;
  padding: 10px 20px;
  text-decoration: none;
  border-radius: 5px;
}