.box-announce {
    background-color: transparent;
    width: 350px;
    height: 500px;
    perspective: 1000px;

}

.box-announce-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.3s;
    transform-style: preserve-3d;
    box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2);
    word-wrap: break-word;
}

.box-announce-front {
    background-color: rgba(0, 0, 0, 0.9);
    color: white;
    border-radius: 10px;
    border: 1px solid white;
    box-shadow: rgba(255, 255, 255, 0.35) 0px 5px 15px;
}

.box-announce-front {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    padding: 20px;

}