<div class="item__content"></div>

.item__content {

    position: relative;

    display: flex;

    flex-direction: column;

    justify-content: center;

    align-items: center;

    width: 80px;

    height: 80px;

    font-size: 40px;

    box-sizing: border-box;

    color: #18314F;

    background-color: #051a2d;

    background-image: url('../img/bg/border-line.png') ,url('../img/bg/border-line.png'),url('../img/bg/border-line.png'),url('../img/bg/border-line.png');

    background-position: top left,top right,bottom left,bottom right;

    background-repeat: no-repeat, no-repeat, no-repeat, no-repeat;

    overflow: hidden;

}