html - 如何水平居中包含两行的div？

Question

我似乎无法让这两行在我的元素的容器中间居中。我希望这两行位于 div 的中心，它们之间有一点边距，但我无法让它工作。

图片

HTML

<div class="page-wrapper">
  <section id="process_section">
            <h1 class="section-header">Our Process</h1>
            <h4 class="text-center">A quick rundown of how we handle things</h4>
            <div id="card_holder">
                <div class="card-row">
                    <div class="card"> <img src="icons/iconmonstr-payment-14-120.png" alt="Avatar">
                        <div class="container">
                            <h4><b>Payment</b></h4>
                            <p>Payment with Paypal</p>
                        </div>
                    </div>
                    <div class="card"> <img src="icons/iconmonstr-shipping-box-8-120.png" alt="Avatar">
                        <div class="container">
                            <h4><b>Ship</b></h4>
                            <p>Send Us Your Item</p>
                        </div>
                    </div>
                </div>
                <div class="card-row">
                    <div class="card"> <img src="icons/iconmonstr-gear-10-120.png" alt="Avatar">
                        <div class="container">
                            <h4><b>Repair</b></h4>
                            <p>Device is repaired</p>
                        </div>
                    </div>
                    <div class="card"> <img src="icons/iconmonstr-shipping-box-9-120.png" alt="Avatar">
                        <div class="container">
                            <h4><b>Return</b></h4>
                            <p>Return in 4-5 days</p>
                        </div>
                    </div>
                </div>
            </div>
        </section>
</div>

CSS

.page-wrapper {
    width: 1024px;
    margin: 0 auto;
}

#process_section {
    background: #D3D3D3;
}

#card_holder {
    width: 100%;
    display: inline;
    height: 20%;
    margin-left: auto;
    margin-right: auto;
}

#card-row {
    display: block;
}

.card {
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
    transition: 0.3s;
    width: 200px;
    height: 300px;
    display: inline-block;
    text-align: center;
    margin-right: 10%;
}

.card:hover {
    box-shadow: 0 8px 16px 0 rgba(0, 0, 0, 0.2);
}

.container {
    padding: 2px 16px;
}

jsfiddle

https://jsfiddle.net/v2vn0wza/

Answer 1

添加此样式:

.page-wrapper {
    text-align: center;
}

Updated Fiddle