响应式网格（连续2张卡）-CSS /引导程序

Question

单击按钮时，卡片将按类别进行过滤。如何使我的4张卡片显示如下：每两行两张卡片，无论是使用Bootstrap还是纯CSS，仍然能够过滤它们，并在单击每个按钮时正确显示它们？

当前每行有一张卡，共有4行。我已经尝试过使用Bootstrap，但是它弄乱了卡片，使我无法正确过滤它们。一行上显示了两张卡，但它们完全重叠，我正在努力进行更改，所有四张卡都有第一张图像。

$(document).ready(function () {


    let $btns = $('.projects .button-group button');


    $btns.click(function (e) {

        $('.projects .button-group button').removeClass('active');
        e.target.classList.add('active');

        let selector = $(e.target).attr('data-filter');
        $('.projects .grid').isotope({
            filter: selector
        });

        return false;
    })

    $('.projects .button-group #btn1').trigger('click');

})

.link {
    height: 425px;
    margin-bottom: 50px;

    &:hover {
        text-decoration: none;

        .project_title {
            text-decoration: underline;
        }
    }
}

.wrapper {
    max-width: 850px;
    margin: 20px auto;
    height: auto;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-around;
}

.card_wrapper {
    width: 460px;
    transition: transform 0.5s;
    position: relative;
    margin: 4rem 3rem;

    border-radius: 6px;
    background: #e4f2f9;
    display: flex;
    flex-direction: column;
    background: url("image");
    background-size: contain;
    background-repeat: no-repeat;
}

a:nth-of-type(2) .card_wrapper {
    background-image: url("image");
}

a:nth-of-type(3) .card_wrapper {
    background-image: url("image");
}

a:nth-of-type(4) .card_wrapper {
    background-image: url("image");
}

.project_summary {
    margin-top: 260px;
    position: relative;
    padding: 0 20px;
    flex: 1;
    border-bottom-left-radius: inherit;
    border-bottom-right-radius: inherit;
    text-align: center;
}

.project_title {
    margin-bottom: 0;
    padding: 0 0.5rem 1rem 0.5rem;
}

.testimonials {
    margin-top: 16%;
}

.project-btn {
    margin: 1rem;
    color: white;
    background-color: orange;
    border: none;
    border-radius: 10%;
    font-size: 14px;
    padding: 0.4rem 0.8rem;
    &:hover {
        color: $navy-blue;
        background: none;
        border: 2px solid orange;
    }
}
.project-category {
    color: orange;
    background: white;
    text-decoration: underline;
    border: none;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
 <div class="button-group">
                <button type="button" class="project-category active text-uppercase">All</button>
                <button type="button" class="project-category text-uppercase" data-filter=".latest">Latest</button>
                <button type="button" class="project-category text-uppercase" data-filter=".frontend">Front End</button>
                <button type="button" class="project-category text-uppercase" data-filter=".fullstack">Full Stack</button>
              </div>
<div class="row grid">
                <a href="#" class="link fullstack latest">
                  <article class="card_wrapper">
                    <div class="project_summary">
                      <h2 class="project_title">project 1</h2>
                      <p class="project_desc text-secondary">
                        project 1 description</p>
                      <button id="ecommerce-code" class="project-btn text-uppercase">View code</button>
                      <button class="project-btn text-uppercase" id="ecommerce-more">View More</button>
                    </div>
                  </article>
                </a>
          
                <a href="#" class="link frontend">
                  <article class="card_wrapper">
                    <div class="project_summary">
                      <h2 class="project_title">project 2</h2>
                      <p class="project_desc para">project 2 description</p>
                      <button class="project-btn text-uppercase" id="portfolio-code">View code</button>
                    </div>
                  </article>
                </a>
               

                <a href="#" class="link frontend">
                  <article class="card_wrapper">
                    <div class="project_summary">
                     <h2 class="project_title">project 3 </h2>
                      <p class="project_desc text-secondary">
                       project 3 description</p>
                      <button class="project-btn text-uppercase" id="devscreate-code">View code</button>
                      <button class="project-btn text-uppercase" id="devscreate-site">Live Website</button>
                    </div>
                  </article>
                </a>
              
                <a href="#" class="link frontend">
                  <article class="card_wrapper"> 
              <div class="project_summary">
                      <h2 class="project_title">project 4</h2>
                      <p class="project_desc text-secondary">
                      project 4 description</p>
                      <button class="project-btn text-uppercase" id="boozles-code">View code</button>
                      <button class="project-btn text-uppercase" id="boozles-site">Live Website</button>
                    </div>
                  </article>
                </a>
                </div>