* {
    /* border: red solid 2px; */
    margin: 0px;
    padding: 0px;
    color: white;
    text-decoration: none;
}

html {
    background: #098 url(/campus.jpg) center;
    background-size: cover;
    background-attachment: fixed;
    height: 100vh;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    font: 6vw 'Montserrat', "微软雅黑", sans-serif;
    font: min(6vw, 12vh) 'Montserrat', "微软雅黑", sans-serif;
}

.container {
    opacity: 0.75;
}

.menu {
    position: relative;
    top: 1em;
    float: right;
    z-index: 1;
    font-size: 0.3em;
    opacity: 0.5;
}

.dropdown,
.dropdown * {
    padding: 0.2em;
    background: white;
    color: gray;
    border-radius: 0.5em;
}

.dropdown>p {
    display: none;
}

.dropdown:hover>p {
    display: block;
    position: absolute;
}

.dropdown>p>a {
    display: block;
}

.bar {
    margin: 0.2em auto;
    width: 100%;
    height: 0.1rem;
    background: rgba(255, 255, 255, 0.2);
}

#bar {
    height: 100%;
    background: white;
}

.card {
    margin: 0.2em auto;
    display: flex;
    flex-wrap: wrap;
}

.card>div {
    margin: 0.1em;
    padding: 0.2em 0.4em;
    background: rgba(255, 255, 255, 0.2);
    display: inline-block;
    border-radius: 0.5em;
}

.card>div>h6 {
    opacity: 0.6;
}

.half {
    font-size: 0.4em;
    opacity: 0.6;
}

@media (max-aspect-ratio: 1/1) {
    html {
        font: 10vw 'Montserrat', "微软雅黑", sans-serif;
        font: min(10vw, 12vh) 'Montserrat', "微软雅黑", sans-serif;
    }

    .menu {
        float: none;
    }

    .card {
        flex-direction: column;
        align-content: center;
    }

    .card>div {
        text-align: center;
    }
}