/* Navigation Styles - 导航栏样式 */

.navigation {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.nav-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
    flex: 1;
}

.nav-logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-image {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.nav-logo:hover {
    color: var(--color-accent);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu-item {
    position: relative;
}

.nav-menu-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
    border-radius: var(--border-radius-md);
}

.nav-menu-link:hover {
    color: var(--color-accent);
    background-color: var(--color-background-light);
}

.nav-menu-link.active {
    color: var(--color-accent);
}

/* Dropdown Arrow */
.dropdown-arrow {
    font-size: var(--font-size-xs);
    margin-left: var(--spacing-xs);
    transition: transform var(--transition-fast);
}

.nav-menu-item-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    list-style: none;
    padding: var(--spacing-sm) 0;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1001;
}

.dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-fast);
}

.dropdown-menu a:hover {
    background-color: var(--color-background-light);
    color: var(--color-accent);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-cart {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
    border-radius: var(--border-radius-md);
    transition: background-color var(--transition-fast);
}

.nav-cart:hover {
    background-color: var(--color-background-light);
}

.cart-count {
    display: none;
    background-color: var(--color-accent);
    color: var(--color-background);
    font-size: var(--font-size-xs);
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
    line-height: 1.4;
}

.language-selector {
    position: relative;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.language-btn:hover {
    background-color: var(--color-background-light);
    border-color: var(--color-accent);
}

.language-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-xs));
    right: 0;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 120px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1001;
}

.language-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-fast);
    border: none;
    background: none;
    cursor: pointer;
    text-align: left;
}

.language-option:hover {
    background-color: var(--color-background-light);
}

.language-option.active {
    background-color: var(--color-background-dark);
    color: var(--color-accent);
    font-weight: 500;
}

/* 移动端响应式 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-fast);
}

@media (max-width: 768px) {
    .nav-left {
        gap: var(--spacing-md);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        background-color: var(--color-background);
        border-top: 1px solid var(--color-border);
        box-shadow: var(--shadow-md);
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base);
        gap: 0;
    }
    
    .nav-menu.show {
        max-height: 500px;
    }
    
    .nav-menu-item {
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-menu-link {
        padding: var(--spacing-md);
        width: 100%;
    }
    
    .nav-actions {
        gap: var(--spacing-sm);
    }
    
    /* 移动端下拉菜单 */
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-top: 1px solid var(--color-border);
        border-radius: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-base);
    }
    
    .dropdown-menu.show {
        max-height: 500px;
    }
    
    .dropdown-menu a {
        padding-left: var(--spacing-xl);
    }
}