/* ========================================
   导航栏样式
   ======================================== */
.navbar {
    position: sticky;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background: var(--color-bg-white);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    z-index: var(--z-sticky);
    transition: box-shadow var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

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

/* Logo */
.navbar-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: var(--font-bold);
    color: var(--color-text);
    flex-shrink: 0;
}

.navbar-logo-icon {
    width: 36px;
    height: 36px;
    background: var(--color-primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-white);
}

.navbar-logo-icon svg {
    width: 20px;
    height: 20px;
}

.navbar-logo-text span {
    color: var(--color-primary);
}

/* 导航菜单 */
.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.navbar-link {
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--color-text);
    transition: color var(--transition-fast);
    position: relative;
}

.navbar-link:hover,
.navbar-link.active {
    color: var(--color-primary);
}

.navbar-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    border-radius: var(--radius-full);
}

/* 分类下拉 */
.navbar-dropdown {
    position: relative;
}

.navbar-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--color-text);
    cursor: pointer;
    transition: color var(--transition-fast);
}

.navbar-dropdown-toggle:hover {
    color: var(--color-primary);
}

.navbar-dropdown-toggle svg {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-fast);
}

.navbar-dropdown.open .navbar-dropdown-toggle svg {
    transform: rotate(180deg);
}

.navbar-dropdown-menu {
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%);
    min-width: 200px;
    background: var(--color-bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-sm) 0;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-dropdown);
}

.navbar-dropdown.open .navbar-dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.navbar-dropdown-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    font-size: var(--font-size-sm);
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.navbar-dropdown-item:hover {
    background: var(--color-primary-bg);
    color: var(--color-primary);
}

.navbar-dropdown-item .count {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    background: var(--color-bg);
    padding: 2px 8px;
    border-radius: var(--radius-full);
}

/* 右侧操作区 */
.navbar-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* 汉堡菜单 */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--nav-height));
    background: var(--color-bg-white);
    padding: var(--spacing-xl);
    overflow-y: auto;
    z-index: var(--z-overlay);
    transform: translateX(-100%);
    transition: transform var(--transition-base);
}

.mobile-menu.open {
    transform: translateX(0);
}

.mobile-menu-link {
    display: block;
    padding: var(--spacing-md) 0;
    font-size: var(--font-size-md);
    font-weight: var(--font-medium);
    color: var(--color-text);
    border-bottom: 1px solid var(--color-bg);
}

.mobile-menu-link:hover {
    color: var(--color-primary);
}

.mobile-menu-category {
    margin-top: var(--spacing-md);
}

.mobile-menu-category h4 {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.mobile-menu-category a {
    display: block;
    padding: var(--spacing-sm) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text);
}

.mobile-menu-category a:hover {
    color: var(--color-primary);
}

/* ========================================
   响应式导航
   ======================================== */
@media (max-width: 1024px) {
    .navbar-menu {
        display: none;
    }

    .navbar-actions .search-box {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .navbar-actions {
        gap: var(--spacing-sm);
    }
}

@media (max-width: 768px) {
    .navbar {
        height: var(--nav-height-mobile);
    }

    .mobile-menu {
        top: var(--nav-height-mobile);
        height: calc(100vh - var(--nav-height-mobile));
        padding: var(--spacing-lg);
    }

    .navbar-logo {
        font-size: var(--font-size-lg);
    }

    .navbar-logo-icon {
        width: 30px;
        height: 30px;
    }

    .mobile-menu-link {
        font-size: var(--font-size-sm);
        padding: var(--spacing-sm) 0;
    }

    .mobile-menu-category h4 {
        font-size: var(--font-size-xs);
    }

    .mobile-menu-category a {
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 480px) {
    .navbar-logo-text {
        font-size: var(--font-size-sm);
    }

    .navbar-logo-icon {
        width: 28px;
        height: 28px;
    }

    .btn-icon {
        width: 36px;
        height: 36px;
    }
}