/* ========================================
   响应式样式 - JDL Overseas 官网
   ======================================== */

/* ==================== 
   平板端 (481px - 1024px)
   ==================== */
@media (max-width: 1024px) {
    :root {
        --font-size-4xl: 2.5rem;
        --font-size-3xl: 2rem;
        --font-size-2xl: 1.75rem;
        --font-size-xl: 1.25rem;
    }
    
    .container {
        padding: 0 var(--spacing-xl);
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .section {
        padding: var(--spacing-3xl) 0;
    }
}

/* ==================== 
   移动端 (最大 768px)
   ==================== */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.5rem;
        --font-size-xl: 1.125rem;
        
        --spacing-4xl: 3rem;
        --spacing-3xl: 2.5rem;
        --spacing-2xl: 2rem;
    }
    
    /* 防止横向溢出 */
    html, body {
        overflow-x: hidden !important;
        width: 100% !important;
        max-width: 100vw !important;
    }
    
    .container {
        padding: 0 var(--spacing-md);
        width: 100% !important;
        max-width: 100% !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }
    
    .header, .navbar {
        width: 100% !important;
        max-width: 100vw !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }
    
    /* 确保所有主要区域不溢出 */
    .section, .hero, .page-header, .footer {
        width: 100% !important;
        max-width: 100vw !important;
        overflow-x: hidden !important;
        box-sizing: border-box !important;
    }
    
    /* 导航栏移动端 */
    .navbar {
        padding: var(--spacing-md) 0;
    }
    
    .nav-brand span {
        font-size: var(--font-size-md);
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: var(--spacing-xl);
        box-shadow: var(--shadow-xl);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateX(0);
    }
    
    .nav-menu li {
        margin-bottom: var(--spacing-md);
    }
    
    .nav-menu a {
        font-size: var(--font-size-lg);
        padding: var(--spacing-sm) 0;
    }
    
    .nav-toggle {
        display: flex;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        z-index: 1000;
    }
    
    .nav-toggle span {
        width: 25px;
        height: 3px;
        background: var(--color-text-primary);
        transition: all 0.3s ease;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Hero区域 */
    .hero {
        min-height: 70vh;
        padding: var(--spacing-4xl) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-md);
    }
    
    .hero-cta {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .hero-cta .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* 语言切换器 - 移动端调整到左下角避免遮挡导航栏和返回顶部按钮 */
    .language-toggle {
        position: fixed !important;
        top: auto !important;
        bottom: 20px !important;
        left: 20px !important;
        right: auto !important;
        transform: none !important;
        display: flex !important;
        flex-direction: row !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 4px !important;
        padding: 4px !important;
        width: auto !important;
        max-width: 110px !important;
        min-width: 90px !important;
        height: 32px !important;
        max-height: 32px !important;
        min-height: 32px !important;
        border-radius: 20px !important;
        background: white !important;
        border: 2px solid #28a745 !important;
        box-shadow: 0 2px 8px rgba(0,0,0,0.15) !important;
        z-index: 999 !important;
    }
    
    .lang-btn {
        padding: 4px 10px !important;
        font-size: 12px !important;
        font-weight: 600 !important;
        min-width: auto !important;
        width: auto !important;
        height: 24px !important;
        line-height: 1 !important;
        white-space: nowrap !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        border-radius: 16px !important;
        border: none !important;
        background: transparent !important;
        color: #666 !important;
        transition: all 0.3s ease !important;
    }
    
    .lang-btn.active {
        background: #28a745 !important;
        color: white !important;
    }
    
    .lang-btn:hover {
        background: #e8f5e9 !important;
        color: #28a745 !important;
    }
    
    .lang-btn.active:hover {
        background: #218838 !important;
        color: white !important;
    }
    
    /* 网格布局 */
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    /* 区块 */
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .section-title {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-md);
    }
    
    .section-subtitle {
        font-size: var(--font-size-md);
        margin-bottom: var(--spacing-xl);
    }
    
    /* 卡片 */
    .card {
        padding: var(--spacing-lg);
    }
    
    .feature-card {
        padding: var(--spacing-xl);
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 30px;
        margin-bottom: var(--spacing-md);
    }
    
    .feature-title {
        font-size: var(--font-size-lg);
    }
    
    .feature-description {
        font-size: var(--font-size-sm);
    }
    
    /* 分类卡片 */
    .category-card {
        min-height: 200px;
    }
    
    .category-icon {
        font-size: 48px;
        margin-bottom: var(--spacing-sm);
    }
    
    .category-name {
        font-size: var(--font-size-xl);
    }
    
    .category-count {
        font-size: var(--font-size-md);
    }
    
    /* 产品卡片 */
    .product-image {
        height: 200px;
    }
    
    .product-content {
        padding: var(--spacing-md);
    }
    
    .product-name {
        font-size: var(--font-size-md);
    }
    
    .product-description {
        font-size: var(--font-size-sm);
    }
    
    /* 按钮 */
    .btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-md);
    }
    
    .btn-lg {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--font-size-md);
    }
    
    /* 数据展示 */
    .stat-number {
        font-size: var(--font-size-3xl);
    }
    
    .stat-label {
        font-size: var(--font-size-md);
    }
    
    /* 表单 */
    .contact-form {
        padding: var(--spacing-xl);
    }
    
    .form-input,
    .form-select,
    .form-textarea {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-md);
    }
    
    /* 页脚 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .footer-section {
        text-align: center;
    }
    
    /* 移动端绿色横线居中对齐 */
    .footer-section h4::after {
        left: 50% !important;
        transform: translateX(-50%) !important;
    }
    
    .footer-section:first-child {
        justify-content: center;
        align-items: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-bottom {
        text-align: center;
        padding-top: var(--spacing-xl);
    }
    
    /* 返回顶部 */
    .back-to-top {
        bottom: var(--spacing-lg);
        right: var(--spacing-lg);
        width: 45px;
        height: 45px;
    }
    
    /* 标签栏 */
    .tabs {
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    
    .tabs::-webkit-scrollbar {
        display: none;
    }
    
    .tab {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
    
    /* 认证徽章 */
    .certification-badge {
        padding: var(--spacing-lg);
    }
    
    /* 客户评价 */
    .testimonial-card {
        padding: var(--spacing-xl);
    }
    
    .testimonial-quote {
        font-size: var(--font-size-md);
    }
    
    .testimonial-avatar {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    /* 搜索框 */
    .search-input {
        padding: 12px 16px 12px 42px !important;
        font-size: var(--font-size-sm);
    }
    
    .search-icon {
        left: 14px !important;
        font-size: 18px;
        width: 18px !important;
        height: 18px !important;
    }
}

/* ==================== 
   超小屏幕 (最大 360px)
   ==================== */
@media (max-width: 360px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.375rem;
        
        --spacing-4xl: 2.5rem;
        --spacing-3xl: 2rem;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .nav-brand img {
        height: 36px;
    }
    
    .hero-title {
        font-size: var(--font-size-xl);
    }
    
    .category-icon {
        font-size: 40px;
    }
    
    .category-name {
        font-size: var(--font-size-lg);
    }
    
    .stat-number {
        font-size: var(--font-size-2xl);
    }
}

/* ==================== 
   桌面端 (大于 768px) - 语言切换器恢复到右上角
   ==================== */
@media (min-width: 769px) {
    .language-toggle {
        position: fixed !important;
        top: 20px !important;
        bottom: auto !important;
        left: auto !important;
        right: 20px !important;
        transform: none !important;
        display: flex !important;
        flex-direction: row !important;
        align-items: center !important;
        justify-content: center !important;
        gap: 6px !important;
        padding: 6px !important;
        width: auto !important;
        max-width: 140px !important;
        min-width: 100px !important;
        height: 36px !important;
        max-height: 36px !important;
        min-height: 36px !important;
        border-radius: 24px !important;
        background: white !important;
        border: 2px solid #28a745 !important;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1) !important;
        z-index: 1000 !important;
    }
    
    .lang-btn {
        padding: 6px 14px !important;
        font-size: 14px !important;
        font-weight: 600 !important;
        width: auto !important;
        height: 26px !important;
        line-height: 1 !important;
        white-space: nowrap !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        border-radius: 18px !important;
        border: none !important;
        background: transparent !important;
        color: #666 !important;
        cursor: pointer !important;
        transition: all 0.3s ease !important;
    }
    
    .lang-btn.active {
        background: #28a745 !important;
        color: white !important;
    }
    
    .lang-btn:hover {
        background: #e8f5e9 !important;
        color: #28a745 !important;
    }
    
    .lang-btn.active:hover {
        background: #218838 !important;
        color: white !important;
    }
}

/* ==================== 
   高分辨率屏幕优化
   ==================== */
@media (min-width: 1440px) {
    .container {
        max-width: 1320px;
    }
}

@media (min-width: 1920px) {
    .container {
        max-width: 1640px;
    }
}

/* ==================== 
   打印样式
   ==================== */
@media print {
    .header,
    .footer,
    .language-toggle,
    .back-to-top,
    .nav-toggle,
    .hero-cta {
        display: none;
    }
    
    .section {
        page-break-inside: avoid;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
}

/* ==================== 
   产品详情页面包屑导航响应式适配
   ==================== */

/* 平板端 (768px 以下) */
@media (max-width: 768px) {
    /* 产品详情页面包屑导航 */
    .product-detail-breadcrumb,
    section[style*="padding: 100px 0 30px"] {
        padding: 130px 0 30px !important;  /* 增加上边距：100px → 130px */
        margin-top: 20px !important;
    }
}

/* 手机端 (480px 以下) */
@media (max-width: 480px) {
    /* 产品详情页面包屑导航 */
    .product-detail-breadcrumb,
    section[style*="padding: 100px 0 30px"] {
        padding: 120px 0 25px !important;  /* 增加上边距：100px → 120px */
        margin-top: 15px !important;
    }
}