body {
    margin: 0;
    min-height: 100vh;
    overflow: hidden;
}

.highlight_font {
    color: #0381d6;
    -webkit-text-stroke: 0.5px #004080;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.9), 0 0 16px rgba(255, 255, 255, 0.7), 0 0 24px rgba(255, 255, 255, 0.5), 0 0 32px rgba(255, 255, 255, 0.3), 0 0 40px rgba(255, 255, 255, 0.1);
    font-size: 72px;
    font-weight: bold;
    font-family: "Microsoft Yahei", sans-serif;
}

.content {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    align-content: flex-start;
    width: 100vw;
    height: 100vh;
    padding: 2rem;
    /*border-radius: 8px;*/
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    background-image: url('navigation-background.jpg');
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
}

    .content #topdiv {
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100vw;
        height: 40vh;
    }

    /*        .content #topdiv span {
            color: #0381d6;
            -webkit-text-stroke: 0.5px #004080;
            text-shadow: 0 0 8px rgba(255, 255, 255, 0.9), 0 0 16px rgba(255, 255, 255, 0.7), 0 0 24px rgba(255, 255, 255, 0.5), 0 0 32px rgba(255, 255, 255, 0.3), 0 0 40px rgba(255, 255, 255, 0.1);
            font-size: 72px;
            font-weight: bold;
            font-family: "Microsoft Yahei", sans-serif;
        }*/

    .content #maindiv {
        width: 1200px;
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
    }

        .content #maindiv div {
            margin-right: 40px;
            margin-bottom: 40px;
            width: 313px;
            height: 150px;
            cursor: pointer;
            cursor: pointer;
        }

            .content #maindiv div image {
                width: 313px;
                height: 150px;
            }

    .content #bottomdiv {
        width: 100vw;
        height: 10vh;
        display: flex;
        align-items: flex-end;
        justify-content: center;
    }

        .content #bottomdiv a {
            font-size: 12px;
            text-decoration: none;
            color: #0381D6;
        }