body {
    width: 100% !important;
    height: 100% !important;
    font-family: 微軟正黑體 !important;
    background-color: #e9ecef !important;
}

.bt-style {
    width: 100% !important;
    height: 100%;
}

.row-height {
    height: 55px !important;
}

.row-wrapper {
    margin: auto;
}

@media screen and (max-width: 500px) {
    #top {
        font-size: 40px !important;
        text-align: center;
    }
}

.rotate {
    animation: rotation 20s infinite linear;
}

@keyframes rotation {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(359deg);
    }
}