/* 全站城市导航（门户 + 城市分站） */

.city-nav-btn {
    border: 1px solid var(--border-color);
    background: #fff;
    padding: 8px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.city-nav-btn:hover,
.city-nav-btn:focus-visible {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
    outline: none;
}

.portal-city-nav {
    position: fixed;
    inset: 0;
    z-index: 1000;
}

.portal-city-nav__overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(2px);
}

.portal-city-nav__dialog {
    position: relative;
    display: flex;
    flex-direction: column;
    width: min(920px, calc(100vw - 32px));
    max-height: min(80vh, 720px);
    margin: 8vh auto;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(15, 23, 42, 0.2);
    overflow: hidden;
}

.portal-city-nav__header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
}

.portal-city-nav__title {
    flex: 1;
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
}

.portal-city-nav__back,
.portal-city-nav__close {
    border: 1px solid var(--border-color);
    background: #fff;
    border-radius: var(--radius);
    padding: 6px 12px;
    cursor: pointer;
    font-size: 14px;
}

.portal-city-nav__back:hover,
.portal-city-nav__close:hover,
.portal-city-nav__back:focus-visible,
.portal-city-nav__close:focus-visible {
    border-color: var(--primary-color);
    color: var(--primary-color);
    outline: none;
}

.portal-city-nav__search-wrap {
    padding: 12px 16px 0;
}

.portal-city-nav__search {
    width: 100%;
    box-sizing: border-box;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 10px 12px;
    font-size: 14px;
}

.portal-city-nav__search:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.15);
}

.portal-city-nav__breadcrumb {
    padding: 8px 16px 0;
    font-size: 13px;
    color: var(--text-light);
}

.portal-city-nav__body {
    display: grid;
    grid-template-columns: minmax(180px, 240px) 1fr;
    gap: 0;
    flex: 1;
    min-height: 0;
    margin-top: 12px;
}

.portal-city-nav__provinces,
.portal-city-nav__cities {
    overflow: auto;
    padding: 8px 12px 16px;
    min-height: 240px;
    max-height: 52vh;
}

.portal-city-nav__provinces {
    border-right: 1px solid var(--border-color);
    background: #f8fafc;
}

.portal-city-nav__province-item,
.portal-city-nav__city-item {
    display: block;
    width: 100%;
    text-align: left;
    border: 1px solid transparent;
    border-radius: 8px;
    background: transparent;
    padding: 10px 12px;
    margin-bottom: 6px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-color);
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.portal-city-nav__province-item:hover,
.portal-city-nav__city-item:hover,
.portal-city-nav__province-item:focus-visible,
.portal-city-nav__city-item:focus-visible {
    background: #fff;
    border-color: var(--border-color);
    outline: none;
}

.portal-city-nav__province-item--active {
    background: #fff;
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
    box-shadow: var(--shadow);
}

.portal-city-nav__city-item:hover {
    color: var(--primary-color);
    border-color: #dbeafe;
    background: #f0f7ff;
}

.portal-city-nav__hint,
.portal-city-nav__empty {
    padding: 12px;
    color: var(--text-light);
    font-size: 14px;
}

body.portal-city-nav-open {
    overflow: hidden;
}

@media (max-width: 768px) {
    .portal-city-nav__dialog {
        width: calc(100vw - 16px);
        margin: 4vh auto;
        max-height: 92vh;
    }

    .portal-city-nav__body {
        grid-template-columns: 1fr;
    }

    .portal-city-nav__provinces {
        border-right: none;
    }

    .portal-city-nav--city-view .portal-city-nav__provinces {
        display: none;
    }

    .portal-city-nav--city-view .portal-city-nav__cities {
        display: block;
    }

    .portal-city-nav:not(.portal-city-nav--city-view) .portal-city-nav__cities {
        display: none;
    }
}