/* 移動端（≤750px）能力與支持專用樣式 */

@media (max-width: 750px) {
    :root {
        --px: calc(1rem / 14);
    }

    .header {
        height: 48px;
        background-color: #FFFFFF;
        border-bottom: 1px solid #F5F5F5;
    }

    .header-container {
        padding: 16px;
        height: 48px;
        position: relative;
    }

    .logo {}

    .logo img {
        width: 143px;
        height: 16px;
    }

.mobile-menu-toggle {
    display: flex;
    align-items: center;
    width: 22px;
    height: 22px;
}



.nav {
    position: fixed;
    top: 48px;
    left: 0;
    width: 100%;
    height: 200px;
    background-color: #FFFFFF;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    z-index: 1001;
    justify-content: flex-start;
}

.nav.active {
    max-height: 530px;
}

.mobile-nav-overlay {
    position: fixed;
    top: 248px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(1, 26, 54, 0.1);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 1000;
    display: block;
}

.mobile-nav-overlay.visible {
    opacity: 1;
    pointer-events: auto;
}

    .nav-list {
        display: flex;
        flex-direction: column;
        list-style: none;
        padding: 0;
        margin: 0;
        gap: 0;
        width: 100%;
    }

    .nav-item {
        width: 100%;
        height: 50px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding-left: 36px;
        border-bottom: 1px solid #F5F5F5;
    }

    .nav-link {
        display: block;
        font-family: 'TW-Normal', sans-serif;
        font-weight: 400;
        font-size: calc(16 * var(--px));
        width: 100%;
        height: 50px;
        line-height: 50px;
        color: #000000;
        text-decoration: none;
        white-space: nowrap;

    }

    .nav-item.active a::before {
        content: '';
        position: absolute;
        bottom: 18px;
        left: -18px;
        background-image: url('../img/group.png');
        background-size: 100%;
        background-repeat: no-repeat;
        object-fit: contain;
        width: 10px;
        height: 10px;
    }

    /* 隐藏下拉菜单在移动端 */
    .dropdown-menu {
        display: none !important;
    }

    /* 禁用移动端的hover效果 */
    .nav-item.dropdown:hover .solution-dropdown,
    .solution-dropdown:hover,
    .nav-item.dropdown .solution-dropdown:hover {
        display: none !important;
    }

    .nav-item.dropdown:hover .capability-dropdown,
    .capability-dropdown:hover,
    .nav-item.dropdown .capability-dropdown:hover {
        display: none !important;
    }

    .nav-item.dropdown:hover .dropdown-menu,
    .dropdown-menu:hover {
        display: none !important;
    }

    .banner {
        height: 400px;
    }

    .banner-content {
        padding: 0 20px;
    }

    .banner-title {
        font-size: 28px;
    }

    .banner-subtitle {
        font-size: 18px;
        margin-left: 0;
    }

    .about-content {
        flex-direction: column;
        gap: 40px;
    }



    .dropdown-content-grid {
        grid-template-columns: 1fr;
        min-width: 100%;
        padding: 20px;
    }

    .dropdown-card {
        height: auto;
        min-height: 240px;
    }
}