/* ===== 主导航栏模块 ===== */
/* HEADER_STYLES_START */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--layout-header-height);
    background-color: var(--color-header-bg);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    z-index: var(--z-index-header);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: transform 0.4s var(--animation-easing), top 0.4s var(--animation-easing);
    padding: 0 var(--spacing-lg);
    transform: translateY(0);
    will-change: transform;
    gap: var(--spacing-lg);
}

@media (min-width: 769px) {
    .header {
        top: var(--layout-topbar-height);
    }
    
    .header.scrolled-up {
        top: 0;
    }
}

.header.hidden {
    transform: translateY(-100%);
}

/* 左侧区域 */
.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    justify-content: flex-start;
    flex-shrink: 0;
    min-width: 0;
}

.menu-toggle {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    cursor: pointer;
    transition: background-color var(--animation-speed-fast);
    touch-action: manipulation;
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.menu-toggle:hover {
    background-color: rgba(0, 0, 0, 0.05);
}

.logo-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    cursor: pointer;
    transition: opacity var(--animation-speed-fast);
    height: 40px;
    flex-shrink: 0;
}

.logo:hover {
    opacity: 0.8;
}

.logo-img {
    height: 100%;
    width: auto;
    max-width: 160px;
    object-fit: contain;
    transition: transform var(--animation-speed-normal) ease;
}

/* 城市选择器 */
.city-selector {
    position: relative;
    flex-shrink: 0;
    z-index: var(--z-index-dropdown);
    display: none;
}

@media (min-width: 769px) {
    .city-selector {
        display: block;
    }
}

.city-selector-btn {
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-muted);
    cursor: pointer;
    transition: color var(--animation-speed-normal), background-color var(--animation-speed-normal);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.city-selector-btn:hover {
    color: var(--color-primary);
    background: rgba(0, 0, 0, 0.05);
}

.city-selector-btn i {
    font-size: 10px;
    color: var(--color-primary);
}

.city-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    width: 240px;
    background: var(--color-card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 0;
    z-index: var(--z-index-dropdown);
    overflow: hidden;
    margin-top: var(--spacing-xs);
    border: 1px solid var(--color-border);
}

@supports (backdrop-filter: blur(8px)) {
    .city-dropdown {
        backdrop-filter: blur(8px);
        background-color: rgba(255, 255, 255, 0.95);
    }
    
    [data-theme="dark"] .city-dropdown {
        background-color: rgba(30, 41, 59, 0.95);
    }
}

.city-section {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.city-section:last-child {
    border-bottom: none;
}

.city-section-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.city-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
}

.city-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) 2px;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    transition: color var(--animation-speed-fast), background-color var(--animation-speed-fast);
    border-radius: var(--radius-sm);
    text-decoration: none;
    text-align: center;
    min-height: 32px;
    line-height: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.city-item:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--color-primary);
}

.city-item.active {
    background: var(--color-primary);
    color: white;
    font-weight: var(--font-weight-medium);
}

.city-item.hot-city {
    font-weight: var(--font-weight-medium);
    color: var(--color-primary);
}

.city-item.hot-city:hover {
    background: rgba(26, 86, 219, 0.1);
    color: var(--color-secondary);
}

.city-item.hot-city.active {
    background: var(--color-primary);
    color: white;
}

/* 中间区域 - 主导航菜单 */
.main-nav-container {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
    position: relative;
}

/* ===== 新增的语义化导航样式 ===== */
.main-nav {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 100%;
    width: 100%;
    max-width: var(--layout-nav-max);
    margin: 0 auto;
    padding-right: var(--spacing-lg);
    margin-left: 120px;
}

.nav-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    height: 100%;
    width: 100%;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    height: 100%;
    display: flex;
    align-items: center;
    position: relative;
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-md);
    color: #425b7e;
    border-radius: var(--radius-md);
    transition: color var(--animation-speed-fast), background-color var(--animation-speed-fast);
    white-space: nowrap;
    position: relative;
    font-weight: var(--font-weight-medium);
    text-align: center;
    flex-shrink: 0;
    height: 100%;
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 12px;
    right: 12px;
    height: 2px;
    background-color: var(--color-primary);
    transform: scaleX(0);
    transform-origin: bottom center;
    transition: transform var(--animation-speed-normal) ease;
}

.nav-link:hover {
    color: var(--color-secondary);
    background-color: rgba(26, 86, 219, 0.05);
}

.nav-link:hover::after {
    transform: scaleX(1);
}

.nav-link.active {
    color: var(--color-secondary);
    font-weight: var(--font-weight-bold);
    background-color: rgba(26, 86, 219, 0.08);
}

.nav-link.active::after {
    transform: scaleX(1);
}

.has-dropdown {
    position: relative;
    height: 100%;
    display: flex;
    align-items: center;
}

.has-dropdown .nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    height: 100%;
}

.has-dropdown .nav-link i.arrow {
    font-size: 10px;
    flex-shrink: 0;
}

.mega-dropdown {
    position: absolute;
    top: 100%;
    background: var(--color-bg);
    border-radius: 10px;
    box-shadow: var(--shadow-lg);
    padding: 0;
    z-index: var(--z-index-dropdown);
    margin-top: var(--spacing-xs);
    border: 1px solid rgba(0, 0, 0, 0.08);
    overflow: hidden;
    min-width: 280px;
}

@supports (backdrop-filter: blur(8px)) {
    .mega-dropdown {
        backdrop-filter: blur(8px);
        background-color: rgba(255, 255, 255, 0.95);
    }
    
    [data-theme="dark"] .mega-dropdown {
        background-color: rgba(30, 41, 59, 0.95);
    }
}

[data-theme="dark"] .mega-dropdown {
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.has-dropdown .mega-dropdown {
    width: 720px;
    left: 0;
    transform: none;
}

.has-dropdown.active .nav-link {
    color: var(--color-primary);
    background: rgba(26, 86, 219, 0.05);
}

.has-dropdown.active .nav-link::after {
    transform: scaleX(1);
}

.mega-content {
    display: flex;
    min-height: 320px;
}

.mega-categories {
    width: 200px;
    background: var(--color-card-bg);
    padding: 18px 0;
    border-right: 1px solid var(--color-border);
    flex-shrink: 0;
}

.mega-category-item {
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    transition: color 0.3s var(--animation-easing), background-color 0.3s var(--animation-easing), border-left-color 0.3s var(--animation-easing);
    color: var(--color-text);
    border-left: 3px solid transparent;
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    text-decoration: none;
}

.mega-category-item:hover,
.mega-category-item.active {
    background: rgba(26, 86, 219, 0.08);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

.mega-category-item i {
    width: 16px;
    text-align: center;
    font-size: var(--font-size-md);
    color: var(--color-primary);
    flex-shrink: 0;
}

.mega-category-name {
    font-size: 13px;
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mega-subcategories {
    flex: 1;
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    align-content: start;
    width: 100%;
}

.category-content {
    display: none;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-xs) 0;
}

.category-content.active {
    display: grid;
}

.mega-subcategory {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    cursor: pointer;
    transition: transform 0.3s var(--animation-easing);
    height: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid transparent;
}

.mega-subcategory:hover {
    transform: translateY(-3px);
    border-color: rgba(26, 86, 219, 0.1);
    box-shadow: var(--shadow-md);
}

.subcategory-image {
    width: 100%;
    height: 100px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-card-bg);
    flex-shrink: 0;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.subcategory-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--animation-speed-slow) var(--animation-easing);
}

.mega-subcategory:hover .subcategory-image img {
    transform: scale(1.05);
}

.subcategory-info {
    padding: var(--spacing-xs) 0;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.subcategory-title {
    font-size: 13px;
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.subcategory-title a {
    color: inherit;
    text-decoration: none;
    display: block;
    width: 100%;
    height: 100%;
}

.subcategory-title a:hover {
    color: var(--color-primary);
}

.subcategory-desc {
    font-size: 11px;
    color: var(--color-muted);
    line-height: 1.4;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.mega-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-card-bg);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.view-all-link {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: color var(--animation-speed-normal) ease, gap var(--animation-speed-normal) ease;
    font-size: 13px;
    white-space: nowrap;
    text-decoration: none;
}

.view-all-link:hover {
    gap: var(--spacing-sm);
    color: var(--color-secondary);
}

/* 右侧区域 */
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-shrink: 0;
    justify-content: flex-end;
    min-width: 0;
}

.search-container {
    position: relative;
    flex-shrink: 0;
}

.desktop-search {
    display: flex;
}

.search-input {
    flex: 1;
    height: 36px;
    background: var(--color-bg);
    border: 1px solid var(--color-primary);
    border-radius: 18px 0 0 18px;
    padding: 0 var(--spacing-md);
    color: var(--color-text);
    font-size: 13px;
    outline: none;
    transition: border-color var(--animation-speed-fast);
    min-width: 140px;
}

.search-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(26, 86, 219, 0.1);
}

.search-btn {
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-left: none;
    border-radius: 0 18px 18px 0;
    width: 44px;
    height: 36px;
    cursor: pointer;
    color: white;
    font-size: 13px;
    transition: background-color var(--animation-speed-normal);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.search-btn:hover {
    background: var(--color-secondary);
}

/* 移动端搜索框优化 */
@media (max-width: 768px) {
    .search-container {
        flex: 1;
        max-width: 180px;
        margin-right: var(--spacing-sm);
    }
    
    .desktop-search {
        display: flex !important;
        width: 100%;
    }
    
    .search-input {
        min-width: 100px;
        flex: 1;
        font-size: var(--font-size-sm);
        padding: 0 var(--spacing-sm);
    }
    
    .search-btn {
        width: 36px;
        height: 36px;
        font-size: var(--font-size-sm);
    }
    
    .mobile-search-trigger {
        display: none !important;
    }
    
    .mobile-search-overlay {
        display: none !important;
    }
}

.mobile-search-trigger {
    display: none;
    background: none;
    border: none;
    width: 36px;
    height: 36px;
    color: var(--color-primary);
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: background-color var(--animation-speed-fast);
    flex-shrink: 0;
}

.mobile-search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--layout-header-height);
    background-color: var(--color-header-bg);
    z-index: 1300;
    transform: translateY(-100%);
    transition: transform var(--animation-speed-normal) ease;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
}

.mobile-search-overlay.active {
    transform: translateY(0);
}

.back-btn {
    background: none;
    border: none;
    color: var(--color-text);
    font-size: var(--font-size-xl);
    margin-right: var(--spacing-md);
    cursor: pointer;
    transition: color var(--animation-speed-fast), background-color var(--animation-speed-fast);
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    touch-action: manipulation;
    flex-shrink: 0;
}

.back-btn:hover {
    color: var(--color-primary);
    background: rgba(0, 0, 0, 0.05);
}

.mobile-search-input {
    flex: 1;
    height: 36px;
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--color-border);
    border-radius: 18px;
    padding: 0 var(--spacing-md);
    color: var(--color-text);
    font-size: 15px;
    outline: none;
    transition: border-color var(--animation-speed-fast), background-color var(--animation-speed-fast);
    min-width: 0;
}

.mobile-search-input:focus {
    border-color: var(--color-primary);
    background: rgba(0, 0, 0, 0.03);
    box-shadow: 0 0 0 2px rgba(26, 86, 219, 0.1);
}

/* 右侧控制按钮 */
.header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

/* 移动端响应式布局 */
@media (max-width: 768px) {
    .header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0 var(--spacing-sm);
        height: var(--mobile-header-height);
        gap: 4px;
    }
    
    .header-left {
        flex: 0 0 auto;
        order: 1;
        min-width: 0;
        gap: 8px;
    }
    
    .menu-toggle {
        width: 28px;
        height: 28px;
        margin-right: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--color-primary);
        border-radius: var(--radius-sm);
        background: rgba(26, 86, 219, 0.05);
    }
    
    .logo-container {
        height: 32px;
        min-width: 0;
        flex-shrink: 0;
    }
    
    .logo {
        height: 32px;
        display: flex;
        align-items: center;
    }
    
    .logo-img {
        height: 32px;
        width: auto;
        max-width: 120px;
        object-fit: contain;
    }
    
    .city-selector {
        display: block !important;
        flex-shrink: 0;
    }
    
    .city-selector-btn {
        padding: 4px 8px;
        font-size: 11px;
        height: 24px;
        line-height: 16px;
        border: 1px solid var(--color-border);
        border-radius: 12px;
        background: rgba(26, 86, 219, 0.05);
        color: var(--color-primary);
    }
    
    .city-selector-btn i {
        font-size: 8px;
        margin-left: 2px;
    }
    
    .main-nav-container {
        display: none;
    }
    
    .header-right {
        flex: 1;
        order: 2;
        justify-content: flex-end;
        min-width: 0;
        gap: 4px;
        margin-left: 0;
        padding-left: 4px;
    }
    
    .search-container {
        position: relative;
        flex: 1;
        max-width: 180px;
        margin-right: 0;
        min-width: 120px;
    }
    
    .desktop-search {
        display: flex !important;
        width: 100%;
        height: var(--mobile-search-height);
        background: rgba(26, 86, 219, 0.05);
        border-radius: 16px;
        overflow: hidden;
        border: 1px solid var(--color-border);
        transition: border-color var(--animation-speed-fast) ease;
    }
    
    .desktop-search:focus-within {
        border-color: var(--color-primary);
        box-shadow: 0 0 0 2px rgba(26, 86, 219, 0.1);
    }
    
    .search-input {
        flex: 1;
        height: 100%;
        min-width: 0;
        font-size: 12px;
        padding: 0 12px;
        background: transparent;
        border: none;
        border-radius: 0;
        color: var(--color-text);
        outline: none;
        font-weight: var(--font-weight-normal);
    }
    
    .search-input::placeholder {
        color: var(--color-muted);
        opacity: 0.8;
    }
    
    .search-btn {
        width: 36px;
        height: 100%;
        background: var(--color-primary);
        border: none;
        border-radius: 0 15px 15px 0;
        color: white;
        font-size: 12px;
        cursor: pointer;
        transition: background-color var(--animation-speed-normal);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }
    
    .search-btn:hover {
        background: var(--color-secondary);
    }
    
    .search-btn i {
        font-size: 12px;
    }
    
    .mobile-search-trigger,
    .mobile-search-overlay {
        display: none !important;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0 8px;
        height: 54px;
    }
    
    .logo-img {
        max-width: 100px;
    }
    
    .city-selector-btn {
        font-size: 10px;
        padding: 3px 6px;
        height: 22px;
        line-height: 14px;
    }
    
    .search-container {
        max-width: 140px;
        min-width: 100px;
    }
    
    .desktop-search {
        height: 28px;
        border-radius: 14px;
    }
    
    .search-input {
        font-size: 11px;
        padding: 0 10px;
    }
    
    .search-btn {
        width: 32px;
        font-size: 11px;
    }
    
    .search-btn i {
        font-size: 11px;
    }
    
    .menu-toggle {
        width: 26px;
        height: 26px;
    }
}

/* 桌面端响应式优化 */
@media (min-width: 769px) {
    .header-left {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
        flex-shrink: 0;
    }
    
    .menu-toggle {
        width: 32px;
        height: 32px;
        border-radius: var(--radius-md);
        display: flex;
        align-items: center;
        justify-content: center;
        position: relative;
    }
    
    .menu-toggle:hover {
        background: rgba(0, 0, 0, 0.05);
    }
    
    .logo-container {
        min-width: 140px;
        height: 40px;
    }
    
    .logo {
        height: 50px;
    }
    
    .logo-img {
        max-width: 140px;
    }
    
    .city-selector {
        display: block !important;
        margin-left: var(--spacing-md);
    }
    
    .main-nav {
        display: flex;
        align-items: center;
        justify-content: center;
        height: 100%;
        width: 100%;
        max-width: var(--layout-nav-max);
    }
    
    .nav-links {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 15px;
        height: 100%;
        width: 100%;
    }
    
    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 14.5px;
        white-space: nowrap;
    }
    
    .header-right {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
        flex-shrink: 0;
        justify-content: flex-end;
        margin-right: 238px;
    }
    
    .mobile-search-trigger,
    .mobile-search-overlay {
        display: none;
    }
    
    .search-container {
        position: relative;
        width: 250px;
        margin: 0;
    }
    
    .desktop-search {
        display: flex !important;
        width: 100%;
    }
}

@media (max-width: 1200px) and (min-width: 769px) {
    .has-dropdown .mega-dropdown {
        width: 600px;
    }
    
    .nav-links {
        gap: var(--spacing-xs);
    }
    
    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 13px;
    }
    
    .search-container {
        width: 180px;
    }
    
    .city-dropdown {
        width: 280px;
    }
}

@media (max-width: 1100px) and (min-width: 769px) {
    .has-dropdown .mega-dropdown {
        width: 540px;
    }
    
    .category-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-links {
        gap: 3px;
    }
    
    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    .search-input {
        min-width: 120px;
    }
    
    .city-dropdown {
        width: 260px;
    }
}

@media (max-width: 992px) and (min-width: 769px) {
    .has-dropdown .mega-dropdown {
        width: 480px;
    }
    
    .category-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .nav-links {
        gap: 2px;
    }
    
    .nav-link {
        padding: var(--spacing-sm) var(--spacing-sm);
        font-size: 11px;
    }
    
    .search-input {
        min-width: 100px;
        font-size: var(--font-size-sm);
        padding: 0 var(--spacing-md);
    }
    
    .search-btn {
        width: 36px;
    }
    
    .city-dropdown {
        width: 240px;
    }
}

@media (max-width: 850px) and (min-width: 769px) {
    .has-dropdown .mega-dropdown {
        width: 420px;
    }
    
    .category-content {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .top-bar {
        display: flex;
    }
    
    .header {
        top: var(--layout-topbar-height);
    }
}

@media (max-width: 769px) and (min-width: 768px) {
    .header {
        padding: 0 10px;
    }
    
    .logo-img {
        max-width: 100px;
    }
    
    .search-container {
        width: 120px;
    }
}
/* HEADER_STYLES_END */

/* 推荐标签样式 */
.recommend-tag {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--color-accent);
    color: #fff;
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 4px;
    z-index: 1;
}

/* 给内容项添加相对定位，让标签定位生效 */
.mega-subcategory {
    position: relative;
    padding: 10px;
    box-sizing: border-box;
}

/* 强制下拉显示 */
#citySelector.dropdown-open .city-dropdown,
.has-dropdown.dropdown-open .mega-dropdown {
    display: block !important;
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(0) !important;
    pointer-events: auto !important;
}

/* 确保下拉默认隐藏 */
#citySelector .city-dropdown,
.has-dropdown .mega-dropdown {
    display: none !important;
}

/* 二级分类内容显示 */
.category-content {
    display: none;
}

.category-content.active {
    display: grid !important;
}

.mega-category-item.active {
    background: rgba(26, 86, 219, 0.08);
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

/* 深色模式 - 主导航链接颜色适配 */
[data-theme="dark"] .nav-link {
    color: #ffffff; /* 主文字变为白色 */
}

[data-theme="dark"] .nav-link:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.1); /* 悬停时增加浅色背景 */
}

[data-theme="dark"] .nav-link.active {
    color: var(--color-primary); /* 激活状态保留品牌色（或根据需要调整为亮色） */
    background-color: rgba(26, 86, 219, 0.25); /* 激活背景稍微加深 */
}

/* 可选：如果下拉箭头也需要调整 */
[data-theme="dark"] .nav-link i.arrow {
    color: rgba(255, 255, 255, 0.7);
}

/* 可选：城市选择器按钮在深色模式下的颜色 */
[data-theme="dark"] .city-selector-btn {
    color: #e0e0e0;
}
[data-theme="dark"] .city-selector-btn:hover {
    color: var(--color-primary);
}