html, body {
    margin: 0;
}

body {
    background: #F9F9F9 url("/static/img-1.png") top center/cover no-repeat;
}

header {
    height: 74px;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 99;
    background: #fff url("/static/img-6.png") top center/cover no-repeat;
}

header img {
    /*transform: translate(40%, 40%);*/
    height: 50px;
    margin: 12px 20px;
    z-index: 2;
    position: relative;
}


header #particles-js{
    width: 100%;
    height: 74px;
    background-color: #1F2438;
    position: absolute;
    top: 0;
    z-index: 1;
}

main {
    height: calc(100vh - 74px);
    transform: translateY(74px);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    z-index: 1;
}

main div {
    background-color: #fff;
    box-shadow: 0 0 1px 1px rgba(255, 255, 255, 0.2);
    text-align: center;
    margin: 0 10px;
    border-radius: 10px;
    width: 22%;
    cursor: pointer;
}

main div img {
    width: 100%;
}

main div sub {
    display: inline-block;
    word-break: break-all;
    width: 80%;
    height: 80px;
    font-size: 13px;
    color: #666;
    line-height: 20px;
}

@media screen and (max-width: 768px) {
    body {

    }

    main:after {
        content: '';
        height: 20px;
        width: 375px;
    }

    main div {
        width: 90%;
        margin-top: 20px;
    }

    main div sub {
        font-size: 15px;
    }
}