/* 子選單：平板維持 hover；手機/抽屜內改為按鈕 +/-/ 展開 */

.nav-submenu-toggle {
    display: none;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    line-height: 1;
    font-weight: 700;
    cursor: pointer;
    color: #1a3a5c;
    border: none;
    background: transparent;
    padding: 0;
}

.nav-submenu-toggle:focus {
    outline: 2px solid #3182ce;
    outline-offset: 2px;
}

.nav-toggle-icon {
    pointer-events: none;
    display: block;
}

/* 768px 斷點：首頁 / 關於 / 聯絡等 */
@media (max-width: 768px) {
    html[data-nav-breakpoint="768"] nav ul li.has-dropdown {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        align-content: flex-start;
        justify-content: space-between;
        gap: 0;
        flex: 0 0 auto;
    }

    html[data-nav-breakpoint="768"] nav ul li.has-dropdown > a {
        flex: 1;
        min-width: 0;
    }

    html[data-nav-breakpoint="768"] .nav-submenu-toggle {
        display: inline-flex;
    }

    html[data-nav-breakpoint="768"] nav ul li.has-dropdown:hover .submenu {
        display: none !important;
    }

    html[data-nav-breakpoint="768"] nav ul li.has-dropdown.is-open .submenu {
        display: block !important;
    }

    html[data-nav-breakpoint="768"] nav ul li.has-dropdown .submenu {
        width: 100%;
        flex: 0 0 auto !important;
        flex-basis: 100%;
        align-self: flex-start;
        height: auto !important;
        min-height: 0 !important;
        max-height: none !important;
        position: static !important;
        box-shadow: none !important;
        border-radius: 6px;
        padding-left: 15px !important;
        margin: 10px 0 !important;
        background: rgba(0, 0, 0, 0.05) !important;
    }

    /* 主選單抽屜維持整屏高度；子選單由上方規則限制為依內容 */
    html[data-nav-breakpoint="768"] nav ul#navMenu {
        height: 100vh !important;
        min-height: 100vh !important;
        max-height: 100vh !important;
    }

    html[data-nav-breakpoint="768"] nav ul#navMenu > li {
        flex: 0 0 auto;
    }

    /* 語言下拉需蓋過側邊選單面板 */
    html[data-nav-breakpoint="768"] header .header-right {
        position: relative;
        z-index: 1002;
    }

    html[data-nav-breakpoint="768"] header .header-lang .lang-dropdown {
        z-index: 1003;
    }
}

/* 992px 斷點：服務內頁等較早切換漢堡的版面 */
@media (max-width: 992px) {
    html[data-nav-breakpoint="992"] nav ul li.has-dropdown {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        align-content: flex-start;
        justify-content: space-between;
        gap: 0;
        flex: 0 0 auto;
    }

    html[data-nav-breakpoint="992"] nav ul li.has-dropdown > a {
        flex: 1;
        min-width: 0;
    }

    html[data-nav-breakpoint="992"] .nav-submenu-toggle {
        display: inline-flex;
    }

    html[data-nav-breakpoint="992"] nav ul li.has-dropdown:hover .submenu {
        display: none !important;
    }

    html[data-nav-breakpoint="992"] nav ul li.has-dropdown.is-open .submenu {
        display: block !important;
    }

    html[data-nav-breakpoint="992"] nav ul li.has-dropdown .submenu {
        width: 100%;
        flex: 0 0 auto !important;
        flex-basis: 100%;
        align-self: flex-start;
        height: auto !important;
        min-height: 0 !important;
        max-height: none !important;
        position: static !important;
        box-shadow: none !important;
        border-radius: 6px;
        padding-left: 15px !important;
        margin: 10px 0 !important;
        background: rgba(0, 0, 0, 0.05) !important;
    }

    html[data-nav-breakpoint="992"] nav ul#navMenu {
        height: 100vh !important;
        min-height: 100vh !important;
        max-height: 100vh !important;
    }

    html[data-nav-breakpoint="992"] nav ul#navMenu > li {
        flex: 0 0 auto;
    }

    html[data-nav-breakpoint="992"] header .header-right {
        position: relative;
        z-index: 1002;
    }

    html[data-nav-breakpoint="992"] header .header-lang .lang-dropdown {
        z-index: 1003;
    }
}