body {
    background: url(../image/background.jpg) fixed;
    background-size: cover;
}

#center {
    margin: 2%;
    padding: 2%;
    border-radius: 2em;
    background-color: white;
    opacity: 0.87;
    box-shadow: 0px 0px 12px gray;
}

#title {
    font-weight: bold;
}

big {
    font-size: 20px;
}

#NTUST {
    width: 9.87%;
}

#angry {
    font-size: 200%;
    vertical-align: top;
}