.about-site-board {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 32px;
    row-gap: 12px;
    margin: 18px 0 22px;
    font-size: 15px;
    text-align: left;
}

.about-site-heading {
    padding: 0 0 8px;
    border-bottom: 1px solid #ccc;
    font-weight: 700;
    color: #333;
}

.about-site-heading-active {
    grid-column: span 2;
}

.about-site-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.about-site-list li {
    margin: 0 0 8px;
    line-height: 1.45;
}

.about-site-list a {
    display: inline-block;
    max-width: 100%;
    word-break: break-word;
}

@media (max-width: 900px) {
    .about-site-board {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        column-gap: 24px;
    }

    .about-site-heading-active {
        grid-column: span 2;
    }
}

@media (max-width: 640px) {
    .about-site-board {
        grid-template-columns: 1fr;
    }

    .about-site-heading,
    .about-site-heading-active {
        grid-column: auto;
    }
}