如何使用HTML和CSS创建一个响应式卡片墙布局

<ul class="card-wall">
    <li class="card">
        <img src="image1.jpg" alt="Image 1">
        <h3>Card 1</h3>
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    </li>
    <li class="card">
        <img src="image2.jpg" alt="Image 2">
        <h3>Card 2</h3>
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    </li>
    <li class="card">
        <img src="image3.jpg" alt="Image 3">
        <h3>Card 3</h3>
        <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit.</p>
    </li>
    ...
</ul>

.card-wall {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

.card {
    width: 300px;
    margin: 10px;
    background-color: #f1f1f1;
    text-align: center;
    padding: 20px;
}

.card img {
    width: 100%;
}

@media only screen and (max-width: 768px) {
    .card {
        width: 90%;
    }
}