#video .card {
    font-size: 2rem;
    font-weight: 700;
}
/*無障礙*/
#video a {
    border: 3px transparent dashed;
}
#video a:hover, #video a:focus {
    border: 3px black dashed;
}
#video .btn:hover, #video .btn:focus {
    border: 3px white dashed;
}