<style>
.card {
    box-shadow: 0 0 10px rgba(0,0,0,0.15);
    font-size: 1em;
    line-height: 1.3;
    margin:1em;
    padding:1em;
    max-width:60em;
    margin-left:auto;
    margin-right:auto;
}
.nav_card{
    margin-left:1em;
    margin-right:1em;
    flex:1;
}
</style>

<div style="display:flex;">

<div class="card nav_card">
    <h3>欢迎</h3>
    <div class="content">
    开始安装PCD Suite
    </div>
</div>

<div id = "step1" class="card nav_card">
    <a href="step1.php" style="display: inline-block;width: 100%;height: 100%;">
        <h3>1.建立目录</h3>
        <div class="content">
    
        </div>
    </a>
</div>

<div  id = "step2" class="card nav_card">
    <a href="step2.php" style="display: inline-block;width: 100%;height: 100%;">
    <h3>2-用户数据存储库</h3>
    <div class="content">
    
    </div>
    </a>
</div>


<div  id = "step3" class="card nav_card">
    <a href="step3.php" style="display: inline-block;width: 100%;height: 100%;">
        <h3>3-字典数据库</h3>
        <div class="content">
        
        </div>
    </a>
</div>

<div  id = "step5" class="card nav_card">
    <a href="step5.php" style="display: inline-block;width: 100%;height: 100%;">
    <h3>建立三藏语料数据库</h3>
    <div class="content">
    Build Pali Canon Database
    </div>
    </a>
</div>

</div>