.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 200;
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

[data-theme="dark"] .navbar {
    background: rgba(13, 17, 23, 0.8);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(13, 17, 23, 0.95);
}

.navbar-container {
    max-width: var(--container-max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    text-decoration: none;
    color: var(--color-text-primary);
    transition: opacity var(--transition-fast);
}

.navbar-brand:hover {
    opacity: 0.8;
}

.navbar-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-accent));
    border-radius: var(--radius-16);
    color: white;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-lg);
}

.navbar-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
}

.navbar-slogan {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    font-weight: var(--font-weight-normal);
    margin-top: 2px;
}

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

/* 导航链接公共样式：桌面导航与移动菜单共用 */
.navbar-link, .navbar-mobile-link {
    display: flex;
    align-items: center;
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-16);
    transition: color var(--transition-fast), background var(--transition-fast);
}

/* 桌面导航链接：紧凑尺寸 */
.navbar-link {
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* 移动菜单链接：宽松触控尺寸 */
.navbar-mobile-link {
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-base);
}

.navbar-link:hover, .navbar-mobile-link:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
}

.navbar-link.active, .navbar-mobile-link.active {
    color: var(--color-brand-primary);
    background: var(--color-brand-primary-light);
}

.navbar-link i {
    font-size: var(--font-size-base);
}

.navbar-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 9px;
    background: linear-gradient(135deg, var(--color-brand-primary), var(--color-brand-accent));
    color: white;
    font-size: 11px;
    font-weight: var(--font-weight-semibold);
    margin-left: var(--spacing-xs);
    box-shadow: 0 2px 6px rgba(var(--color-brand-primary-rgb), 0.4);
}

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

.navbar-mobile-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

/* 主题切换与移动菜单按钮公共样式 */
.navbar-theme-toggle, .navbar-mobile-toggle {
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-16);
    background: transparent;
    color: var(--color-text-secondary);
    transition: background var(--transition-fast), color var(--transition-fast);
}

.navbar-theme-toggle {
    display: flex;
}

.navbar-mobile-toggle {
    display: none;
}

.navbar-theme-toggle:hover, .navbar-mobile-toggle:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.navbar-mobile-menu {
    display: none;
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-primary);
    padding: var(--spacing-lg);
    overflow-y: auto;
    z-index: 300;
    animation: fadeInUp var(--transition-base) ease-out;
}

.navbar-mobile-menu.active {
    display: block;
}

.navbar-mobile-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

@media (max-width: 1024px) {
    .navbar-nav {
        display: none;
    }
    
    .navbar-mobile-toggle {
        display: flex;
    }
    
    .navbar-actions .btn {
        display: none;
    }
}

@media (max-width: 768px) {
    .navbar-container {
        padding: 0 var(--spacing-md);
    }
    
    .navbar-slogan {
        display: none;
    }
    
    .navbar-title {
        font-size: var(--font-size-lg);
    }
    
    .navbar-logo {
        width: 36px;
        height: 36px;
        font-size: var(--font-size-base);
    }
    
    .navbar-theme-toggle {
        width: 36px;
        height: 36px;
    }
    
    .navbar-mobile-toggle {
        width: 36px;
        height: 36px;
    }
    
    .navbar-mobile-menu {
        padding: var(--spacing-md);
    }
    
    .navbar-mobile-actions {
        margin-top: var(--spacing-lg);
        padding-top: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .navbar-container {
        padding: 0 var(--spacing-sm);
    }
    
    .navbar-brand {
        gap: var(--spacing-sm);
    }
    
    .navbar-logo {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-sm);
        border-radius: var(--radius-12);
    }
    
    .navbar-title {
        font-size: var(--font-size-base);
    }
    
    .navbar-theme-toggle {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-sm);
    }
    
    .navbar-mobile-toggle {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-sm);
    }
    
    .navbar-mobile-menu {
        padding: var(--spacing-sm);
        top: var(--navbar-height);
    }
    
    .navbar-mobile-nav {
        gap: var(--spacing-xs);
    }
    
    .navbar-mobile-actions {
        margin-top: var(--spacing-md);
        padding-top: var(--spacing-md);
        gap: var(--spacing-sm);
    }
    
    .navbar-mobile-actions .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}