.box-a {
    width: 200px;
    height: 200px;
    display: inline-block;
    background-color: #aaa;
}

.box-b {
    width: 200px;
    height: 200px;
    display: inline-block;
    background-color: #faa;
}

.font-to-right{
    text-align: right;
}

.product-title {
    background-color: #000;
    color:#fff;
    padding:10px;
    cursor:pointer;
}

.product-content {
    display: none;
}

.full-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    background: rgba(0,0,0,.5);
    display:flex;
    justify-content :center ;
    align-items :center ;
}

    .full-screen .full-screen-text {
        width: 90%;
        max-width: 500px;
        max-height: 80%;
        height: 300px;
        background: #fff;
        padding: 20px;
        position: relative;
    }

        .full-screen .full-screen-text .full-screen-text-btn-close {
            position: absolute;
            width: 30px;
            height: 30px;
            line-height: 30px;
            text-align: center;
            background-color: #f00;
            color: #fff;
            text-decoration: none;
            top: -15px;
            right: -15px;
            border-radius: 50%;
        }