.main-nav {
    width: 100%;
    max-width: 1100px;
    margin: 20px auto 0;
    background-color: #fff;
}

.main-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav>ul {
    display: flex;
    justify-content: center;
    gap: 0;
    border-left: solid 1px #707070;
}

.main-nav>ul>li {
    position: relative;
    width: 20%;
    margin: 0;
    border-right: solid 1px #707070;
}

.main-nav>ul>li>a {
    display: block;
    padding: 20px 25px;
    color: #333;
    font-weight: bold;
    position: relative;
}

.main-nav>ul>li.is-open>a {
    background-color: #30818a;
    color: #FFF;
}

.mega-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100vw;
    max-width: 600px;
    background-color: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 20px 30px;
    border: 3px solid #30818A;
    z-index: 1100;
}

.mega-menu.opens-up {
    top: auto;
    bottom: 100%;
    box-shadow: 0 -4px 8px rgba(0, 0, 0, 0.1);
}

.main-nav>ul>li.is-open .mega-menu {
    display: block;
}

.mega-menu-content {
    display: flex;
    gap: 30px;
}

.mega-menu-column {
    flex: 1;
}

.mega-menu-column ul {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0 15px;
}

.mega-menu-column ul li {
    margin-bottom: 0px;
}

.mega-menu-column ul li a {
    display: block;
    padding: 3px;
    color: #333;
}

.hamburger-menu {
    display: none;
    cursor: pointer;
    padding: 15px;
    background: none;
    border: none;
}

.hamburger-menu .bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #333;
    margin: 5px 0;
    transition: 0.4s;
}

.no-scroll {
    overflow: hidden;
}

/* ----------------------------------------------------------- */
/* .supportNavのちらつき防止
/* ----------------------------------------------------------- */
/* 初期状態では透明にしておく */
.supportNav {
    opacity: 0;
    /* visibility: hidden; を使う方法もあります */
    transition: opacity 0.2s ease-in-out;
    /* 表示される際に少し滑らかにする（任意） */
}

/* JavaScriptによる移動完了後に付与するクラス */
.supportNav.is-ready {
    opacity: 1;
    /* visibility: visible; */
}

@media (max-width: 992px) {
    .hamburger-menu {
        display: block;
        z-index: 10000;
        position: fixed;
        top: 10px;
        right: 15px;
        background-color: #FFF;
        border: solid 1px gainsboro;
        border-radius: 4px;
    }

    .hamburger-menu:hover {
        background-color: #FFF;
    }

    .hamburger-menu.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger-menu.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger-menu.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .main-nav {
        display: flex;
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        align-items: center;
        padding-top: 80px;
        transform: translateX(-100%);
        overflow-y: auto;
        margin: 0;
        box-sizing: border-box;
    }

    .main-nav.active {
        transform: translateX(0);
        z-index: 9999;
        align-items: flex-start;
        margin-top: -70px;
    }

    .main-nav.active+.main-nav-overlay {
        display: block;
    }

    .main-nav>ul {
        flex-direction: column;
        width: calc(100% - 24px);
        gap: 0;
        border-left: none;
        margin: 0 auto;
        border: solid 1px #30818a;
        border-radius: 10px;
    }

    .main-nav>ul>li {
        width: 100%;
        border-right: none;
        border-bottom: solid 1px #707070;
    }

    .main-nav>ul>li:last-child {
        border-bottom: none;
    }

    .main-nav>ul>li>a {
        padding: 15px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        background-image: none;
        background-position: center;
        background-size: auto;
        padding-top: 15px;
        padding-bottom: 15px;
        text-align: left;
    }

    .main-nav>ul>li>a::after {
        content: '';
        display: inline-block;
        width: 0;
        height: 0;
        border-style: solid;
        border-width: 0.4em 0.4em 0;
        border-color: currentColor transparent transparent;
        margin-left: 0.5em;
        vertical-align: middle;
        transition: transform 0.3s;
    }

    .main-nav>ul>li>a.open::after {
        transform: rotate(180deg);
    }

    .mega-menu {
        position: static;
        width: auto;
        max-width: none;
        box-shadow: none;
        border-top: none;
        background-color: #f9f9f9;
        display: block;
        overflow: hidden;
        box-sizing: border-box;
        padding-left: 15px;
        padding-right: 15px;
        max-height: 0;
        padding-top: 0;
        padding-bottom: 0;
        transition: max-height 0.4s ease-in-out, padding-top 0.4s ease-in-out, padding-bottom 0.4s ease-in-out;
        border: none;
    }

    /* 開いた状態のスタイル */
    .main-nav>ul>li.is-open .mega-menu {
        max-height: 100vh;
        padding-top: 15px;
        padding-bottom: 15px;
    }

    .main-nav>ul>li.gyosei.is-open .mega-menu {
        border-radius: 0px 0px 10px 10px;
    }

    .mega-menu-content {
        flex-direction: column;
        gap: 0;
    }

    .mega-menu-column h3 {
        padding-top: 15px;
    }

    .site-header>.iza-toggle {
        display: none;
    }

    .site-header>.izaSection {
        display: none;
    }

    .main-nav>.izaSection {
        display: block;
    }

    .main-nav .izaSection {
        position: static;
        transform: none;
        height: auto;
        width: 100%;
        pointer-events: auto;
        padding: 15px;
        box-sizing: border-box;
    }

    .main-nav .iza-menu {
        visibility: visible;
        transform: none;
        position: static;
        width: 100%;
        height: auto;
        overflow-y: visible;
        box-shadow: none;
        border: none;
        padding: 0;
        background-color: transparent;
    }

    .main-nav .iza-menu h2 {
        margin: 0 0 10px 0;
        padding: 0;
        font-size: 1rem;
        font-weight: bold;
        text-align: left;
        color: #333;
        display: block;
    }

    .main-nav .iza-menu h2::before {
        display: none;
    }

    .main-nav .iza-menu>ul {
        display: block;
        padding: 0;
        margin: 0;
        gap: 0;
        list-style: none;
    }

    .main-nav .iza-menu>ul li {
        margin-bottom: 8px;
    }

    .main-nav .iza-menu>ul li:last-child {
        margin-bottom: 0;
    }

    .supportNav {
        width: calc(100% - 90px);
        margin: 0 10px 20px;
        border-radius: 6px;
        box-shadow: none;
    }

    .main-nav>ul>li>a.open {
        background-color: #30818a;
        color: #FFF;
    }

    .main-nav.active ul li.kurashi a.open {
        background-image: url('/img/top/gi-kurashi-siro.png');
        border-radius: 9px 9px 0px 0px;
    }

    .main-nav.active ul li.kosodate a.open {
        background-image: url('/img/top/gi-kosodate-siro.png');
    }

    .main-nav.active ul li.kenko a.open {
        background-image: url('/img/top/gi-kenko-siro.png');
    }

    .main-nav.active ul li.shigoto a.open {
        background-image: url('/img/top/gi-shigoto-siro.png');
    }

    .main-nav.active ul li.gyosei a.open {
        background-image: url('/img/top/gi-gyosei-siro.png');
    }
}

.main-nav .gyosei>a,
.main-nav .shigoto>a,
.main-nav .kenko>a,
.main-nav .kosodate>a,
.main-nav .kurashi>a {
    display: block;
    background-repeat: no-repeat;
    background-position: center top 6px;
    background-size: 70px;
    text-align: center;
    padding-top: 66px;
    padding-bottom: 6px;
    text-decoration: none;
}

.main-nav .kurashi>a {
    background-image: url('/img/top/gi-kurashi.png');
}

.main-nav .kurashi.is-open>a {
    background-image: url('/img/top/gi-kurashi-siro.png');
}

.main-nav .kosodate>a {
    background-image: url('/img/top/gi-kosodate.png');
}

.main-nav .kosodate.is-open>a {
    background-image: url('/img/top/gi-kosodate-siro.png');
}

.main-nav .kenko>a {
    background-image: url('/img/top/gi-kenko.png');
}

.main-nav .kenko.is-open>a {
    background-image: url('/img/top/gi-kenko-siro.png');
}

.main-nav .shigoto>a {
    background-image: url('/img/top/gi-shigoto.png');
}

.main-nav .shigoto.is-open>a {
    background-image: url('/img/top/gi-shigoto-siro.png');
}

.main-nav .gyosei>a {
    background-image: url('/img/top/gi-gyosei.png');
}

.main-nav .gyosei.is-open>a {
    background-image: url('/img/top/gi-gyosei-siro.png');
}

.mega-menu-column ul li a {
    position: relative;
    display: block;
    padding-left: 30px;
    line-height: 24px;
    text-decoration: none;
}

.mega-menu-column ul li a:hover {
    text-decoration: underline;
}

.mega-menu-column ul li a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background-color: #30818a;
    border-radius: 50%;
}

.mega-menu-column ul li a::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 14px;
    width: 5px;
    height: 5px;
    border-top: 2px solid #FFF;
    border-right: 2px solid #FFF;
    transform: translateY(-50%) rotate(45deg);
}


/* 追加2026年1月8日 */
/* タッチデバイスでメガメニュー内をスクロール可能にする */
@media (hover: none) and (min-width: 993px) {
    .mega-menu {
        max-height: 80vh;
        /* 画面からはみ出さないよう制限 */
        overflow-y: auto;
        /* メニュー内が長い場合にスクロール可能に */
        -webkit-overflow-scrolling: touch;
    }
}