/* ===== site-nav（Mobile Phone抽屉） ===== */

body.is-nav-open {
    overflow: hidden;
}

.btn-menu-bars {
    position: relative;
    display: block;
    width: calc(22 * var(--rpx));
    height: calc(16 * var(--rpx));
}

.btn-menu {
    position: relative;
}

.btn-menu .bar {
    position: absolute;
    left: 0;
    width: 100%;
    height: calc(2 * var(--rpx));
    border-radius: calc(1 * var(--rpx));
    background: var(--text);
    transform-origin: center center;
    transition:
        transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
        opacity 0.2s ease,
        top 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

.btn-menu .bar-top {
    top: 0;
}

.btn-menu .bar-mid {
    top: calc(7 * var(--rpx));
}

.btn-menu .bar-bot {
    top: calc(14 * var(--rpx));
}

.btn-menu.is-open .bar-top {
    top: calc(7 * var(--rpx));
    transform: rotate(45deg);
}

.btn-menu.is-open .bar-mid {
    opacity: 0;
}

.btn-menu.is-open .bar-bot {
    top: calc(7 * var(--rpx));
    transform: rotate(-45deg);
}

.site-nav {
    display: none;
}

.site-nav-overlay,
.site-nav-drawer {
    display: none;
}

@media (max-width: 828px) {
    .site-nav {
        display: block;
        position: fixed;
        top: 0;
        right: 0;
        bottom: 0;
        left: 0;
        inset: 0;
        width: 100%;
        height: 100%;
        z-index: 720;
        pointer-events: none;
        visibility: hidden;
        opacity: 0;
        transition: opacity 0.28s ease, visibility 0.28s;
    }

    .site-nav.is-open {
        visibility: visible;
        opacity: 1;
    }

    .site-nav.is-open .site-nav-overlay,
    .site-nav.is-open .site-nav-drawer {
        pointer-events: auto;
    }

    .site-nav-overlay,
    .site-nav-drawer {
        display: block;
    }

    .site-nav-overlay {
        position: absolute;
        top: var(--header-height);
        right: 0;
        bottom: 0;
        left: 0;
        background: rgba(0, 12, 36, 0.45);
        opacity: 0;
        transition: opacity 0.28s ease;
    }

    .site-nav.is-open .site-nav-overlay {
        opacity: 1;
    }

    .site-nav-drawer {
        position: absolute;
        top: var(--header-height);
        right: 0;
        left: 0;
        width: 100%;
        max-width: none;
        height: calc(100% - var(--header-height));
        display: flex;
        flex-direction: column;
        box-sizing: border-box;
        background: #fff;
        border-top: calc(1 * var(--rpx)) solid rgba(0, 0, 0, 0.15);
        box-shadow: none;
        transform: translateX(100%);
        transition: transform 0.34s cubic-bezier(0.22, 1, 0.36, 1);
        overflow: hidden;
    }

    .site-nav.is-open .site-nav-drawer {
        transform: translateX(0);
    }

    .site-nav-drawer-menu {
        flex: 1;
        min-height: 0;
        overflow-x: hidden;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        padding: calc(8 * var(--rpx)) 0 calc(32 * var(--rpx));
    }

    .site-nav-mobile-item {
        border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    }

    .site-nav-mobile-row {
        display: flex;
        align-items: stretch;
        min-height: calc(64 * var(--rpx));
    }

    .site-nav-mobile-link {
        flex: 1;
        min-width: 0;
        display: flex;
        align-items: center;
        padding: calc(16 * var(--rpx)) calc(32 * var(--rpx));
        color: var(--text);
        font-size: calc(16 * var(--fpx));
        font-weight: 600;
        line-height: 1.3;
        text-decoration: none;
    }

    .site-nav-mobile-link:active {
        background: #f7f7f7;
    }

    .site-nav-mobile-expand {
        flex-shrink: 0;
        width: calc(64 * var(--rpx));
        border: none;
        padding: 0;
        background: transparent;
        cursor: pointer;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .site-nav-mobile-expand span {
        width: calc(10 * var(--rpx));
        height: calc(10 * var(--rpx));
        border-right: calc(2 * var(--rpx)) solid var(--muted);
        border-bottom: calc(2 * var(--rpx)) solid var(--muted);
        transform: rotate(45deg);
        transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .site-nav-mobile-item.is-expanded .site-nav-mobile-expand span {
        transform: rotate(-135deg);
    }

    .site-nav-mobile-sub {
        max-height: 0;
        overflow: hidden;
        background: #f5f6f7;
        transition: max-height 0.34s cubic-bezier(0.22, 1, 0.36, 1);
    }

    .site-nav-mobile-sub-link {
        display: block;
        padding: calc(12 * var(--rpx)) calc(32 * var(--rpx)) calc(12 * var(--rpx)) calc(48 * var(--rpx));
        color: var(--muted);
        font-size: calc(16 * var(--fpx));
        font-weight: 600;
        line-height: 1.4;
        text-decoration: none;
    }

    .site-nav-mobile-sub-link:first-child {
        padding-top: calc(8 * var(--rpx));
    }

    .site-nav-mobile-sub-link:last-child {
        padding-bottom: calc(12 * var(--rpx));
    }

    .site-nav-mobile-sub-link:active {
        color: var(--brand);
        background: rgba(6, 83, 182, 0.04);
    }
}

@media (min-width: 829px) {
    .site-nav,
    .site-nav-overlay,
    .site-nav-drawer {
        display: none !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    .btn-menu .bar,
    .site-nav,
    .site-nav-overlay,
    .site-nav-drawer {
        transition: none !important;
    }
}