.greeting_info {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    margin-top: 40px;
}

/* PC（961px以上）：スマホ用改行は消す */
@media (min-width: 961px) {
    /*.br_sp { 
        display: none; 
    }*/

    .greeting_info p {
        line-height: 1.8; /* 行間を広めにして読みやすく */
    }
}

/* スマホ・タブレット（960px以下）：スマホ用改行を有効にする */
@media (max-width: 960px) {
    /*.br_sp { 
        display: inline; 
    }*/
    .greeting_info p {
        text-align: center;
        line-height: 1.8; /* 行間を広めにして読みやすく */
    }
}
.sign {
    display: flex;
    margin-left: auto;
    margin-right: 2em;
    margin-top:30px;
}

.company {
    display: flex;
    width: 100%;
    height: 100%;
    position: relative;
}

.about_us_table {
    border-collapse: collapse;
    width: 100%;
}

.about_us_table th,
.about_us_table td {
    border-top: 1px solid #333;
    border-bottom: 1px solid #333;
    border-left: none;
    border-right: none;
    padding: 8px;
    text-align: left;
    vertical-align: top; 
}

.about_us_table .right {
    text-align: right;
}


.about_us_nav {
    background: #f5f5f5;
    padding: 0.5em 2em;
    margin-bottom: 1em;
    position: sticky;
    top: 0;
    z-index: 9999; 
}

@media (max-width: 960px) {
    .about_us_nav {
        display: none;
    }
}

.about_us_nav ul {
    list-style: none;
    display: flex;
    gap: 2em;
    margin: 0;
    padding: 0;
}

.about_us_nav a {
    text-decoration: none;
    color: #009e41;
    font-weight: bold;
    transition: color 0.2s;
}

.about_us_nav a:hover {
    color: #71c963;
}


.about_us_p {
    margin-top: 20px;
    text-align: center;
}

@media(min-width: 961px) {
    .about_us_p {
        font-size: clamp(8px, 1.5vw, 20px);
    }
}