solarai/resources/views/pages/portfolio.blade.php

<section class="main-portfolio" id="portfolio">
    <div class="container">
        <div class="row">
            <div class="col-6 col-md-4 col-lg-3">
                <div>
                    item
                </div>
            </div>

            
            <div class="col-6 col-md-4 col-lg-3">
                <div>
                    item
                </div>
            </div>

            
            <div class="col-6 col-md-4 col-lg-3">
                <div>
                    item
                </div>
            </div>

            
            <div class="col-6 col-md-4 col-lg-3">
                <div>
                    item
                </div>
            </div>
        </div>
    </div>
</section>