.blink {
    animation-duration: 1s;
    animation-name: blink;
    animation-iteration-count: infinite;
    animation-direction: alternate;
    animation-timing-function: ease-in-out;
    font-style: italic;
}

@keyframes blink {
    from {
        opacity: 1;
    }

    to {
        opacity: 0;
    }
}

.case_num {
    width: 20%;
}

.br_class {
    box-sizing: border-box;
    font-family: custom-serif, PMingLiu, MingLiu, Arial, Helvetica, sans-serif;
    font-size: 15.6px;
    letter-spacing: 1px;
    background-color: rgb(239, 239, 239);
}