/* ============================================
   Zhengzhou Zeyao Media Technology Co., Ltd.
   Responsive Styles
   ============================================ */

/* ==================== Large Desktop (1400px+) ==================== */
@media (min-width: 1400px) {
    :root {
        --container-max: 1320px;
    }
    
    .hero-title {
        font-size: var(--text-8xl);
    }
    
    .section-title {
        font-size: var(--text-6xl);
    }
}

/* ==================== Desktop (1200px - 1399px) ==================== */
@media (max-width: 1399px) {
    :root {
        --text-7xl: 3.5rem;
        --text-6xl: 3rem;
        --text-5xl: 2.5rem;
    }
    
    .hero-title {
        font-size: var(--text-6xl);
    }
    
    .hero-visual {
        width: 500px;
        height: 500px;
    }
    
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ==================== Small Desktop (992px - 1199px) ==================== */
@media (max-width: 1199px) {
    :root {
        --text-7xl: 3rem;
        --text-6xl: 2.5rem;
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --container-padding: 1.5rem;
    }
    
    .hero {
        min-height: auto;
        padding: 120px 0 80px;
    }
    
    .hero-title {
        font-size: var(--text-5xl);
    }
    
    .hero-description {
        font-size: var(--text-lg);
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }
    
    .hero-visual {
        display: none;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-3xl);
    }
    
    .about-content {
        padding-right: 0;
        text-align: center;
    }
    
    .about-features {
        max-width: 600px;
        margin: var(--spacing-2xl) auto 0;
    }
    
    .about-visual {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .app-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-3xl);
    }
    
    .app-preview {
        order: -1;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-3xl);
    }
    
    .contact-info {
        padding-right: 0;
        text-align: center;
    }
    
    .contact-details {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .footer-top {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-2xl);
    }
    
    .footer-brand {
        grid-column: span 2;
        text-align: center;
        max-width: 100%;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-column {
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-grid-full {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .ad-platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==================== Tablet (768px - 991px) ==================== */
@media (max-width: 991px) {
    :root {
        --text-7xl: 2.5rem;
        --text-6xl: 2rem;
        --text-5xl: 1.75rem;
        --text-4xl: 1.5rem;
        --spacing-5xl: 5rem;
        --spacing-4xl: 4rem;
    }
    
    .navbar-menu {
        display: none;
    }
    
    .navbar-cta .btn {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .mobile-menu {
        display: block;
    }
    
    .hero-title {
        font-size: var(--text-4xl);
    }
    
    .hero-badge {
        font-size: var(--text-xs);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-stat-number {
        font-size: var(--text-3xl);
    }
    
    .section-badge {
        font-size: var(--text-xs);
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .about-image-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .about-image-item:first-child,
    .about-image-item:last-child {
        transform: none;
    }
    
    .about-floating-card {
        position: relative;
        bottom: auto;
        left: auto;
        margin-top: var(--spacing-lg);
        justify-content: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .app-feature-item {
        padding: var(--spacing-lg);
    }
    
    .app-feature-icon {
        width: 48px;
        height: 48px;
    }
    
    .app-feature-icon svg {
        width: 24px;
        height: 24px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .stat-card {
        padding: var(--spacing-lg);
    }
    
    .stat-number {
        font-size: var(--text-4xl);
    }
    
    .stat-label {
        font-size: var(--text-base);
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .news-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .contact-form {
        padding: var(--spacing-xl);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .featured-news {
        grid-template-columns: 1fr;
    }
    
    .all-news {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .contact-grid-full {
        grid-template-columns: 1fr;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        width: 100%;
        justify-content: flex-start !important;
        margin-left: 0 !important;
        padding-left: 50px;
    }
    
    .timeline-content {
        max-width: 100%;
        margin: 0 !important;
    }
    
    .ad-types-grid {
        grid-template-columns: 1fr;
    }
    
    .ad-platforms-grid {
        grid-template-columns: 1fr;
    }
    
    .page-header {
        padding: var(--spacing-4xl) 0 var(--spacing-3xl);
    }
}

/* ==================== Mobile Large (576px - 767px) ==================== */
@media (max-width: 767px) {
    :root {
        --text-7xl: 2rem;
        --text-6xl: 1.75rem;
        --text-5xl: 1.5rem;
        --text-4xl: 1.25rem;
        --text-3xl: 1.125rem;
        --spacing-5xl: 4rem;
        --spacing-4xl: 3rem;
        --spacing-3xl: 2rem;
        --container-padding: 1rem;
    }
    
    body {
        font-size: var(--text-base);
    }
    
    .navbar-brand svg {
        height: 36px;
    }
    
    .navbar-brand-text {
        font-size: var(--text-base);
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .hero-badge {
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-title {
        font-size: var(--text-3xl);
        margin-bottom: var(--spacing-lg);
    }
    
    .hero-description {
        font-size: var(--text-base);
        margin-bottom: var(--spacing-xl);
    }
    
    .hero-buttons {
        align-items: center;
    }
    
    .btn-lg {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--text-base);
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
        margin-top: var(--spacing-2xl);
        padding-top: var(--spacing-xl);
    }
    
    .hero-stat {
        padding: var(--spacing-md);
    }
    
    .hero-stat-number {
        font-size: var(--text-2xl);
    }
    
    .hero-stat-label {
        font-size: var(--text-xs);
    }
    
    .section {
        padding: var(--spacing-4xl) 0;
    }
    
    .section-title {
        margin-bottom: var(--spacing-lg);
    }
    
    .section-description {
        font-size: var(--text-base);
    }
    
    .about-floating-card {
        flex-direction: column;
        text-align: center;
    }
    
    .services-header {
        margin-bottom: var(--spacing-2xl);
    }
    
    .service-card {
        padding: var(--spacing-xl);
    }
    
    .service-icon {
        width: 60px;
        height: 60px;
        margin-bottom: var(--spacing-lg);
    }
    
    .service-icon svg {
        width: 30px;
        height: 30px;
    }
    
    .app-header {
        margin-bottom: var(--spacing-2xl);
    }
    
    .app-download {
        flex-direction: column;
    }
    
    .app-download .btn {
        width: 100%;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-icon {
        width: 48px;
        height: 48px;
    }
    
    .stat-icon svg {
        width: 24px;
        height: 24px;
    }
    
    .stat-number {
        font-size: var(--text-3xl);
    }
    
    .portfolio-header {
        margin-bottom: var(--spacing-2xl);
    }
    
    .portfolio-overlay {
        opacity: 1;
    }
    
    .cta-content .section-description {
        font-size: var(--text-base);
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .team-header {
        margin-bottom: var(--spacing-2xl);
    }
    
    .team-member-info {
        padding: var(--spacing-lg);
    }
    
    .news-header {
        margin-bottom: var(--spacing-2xl);
    }
    
    .news-card-content {
        padding: var(--spacing-lg);
    }
    
    .contact-section .section {
        padding: var(--spacing-3xl) 0;
    }
    
    .contact-form {
        padding: var(--spacing-lg);
    }
    
    .form-group {
        margin-bottom: var(--spacing-md);
    }
    
    .footer-top {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        grid-column: 1;
    }
    
    .footer-social {
        justify-content: center;
    }
    
    .footer-links {
        padding: 0;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-legal {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .featured-news-content {
        padding: var(--spacing-lg);
    }
    
    .contact-card {
        padding: var(--spacing-xl);
    }
    
    .map-section {
        height: 300px;
    }
    
    .legal-section {
        margin-bottom: var(--spacing-2xl);
    }
    
    .legal-section h2 {
        font-size: var(--text-xl);
    }
    
    .legal-section h3 {
        font-size: var(--text-lg);
    }
}

/* ==================== Mobile Small (320px - 575px) ==================== */
@media (max-width: 575px) {
    :root {
        --text-7xl: 1.75rem;
        --text-6xl: 1.5rem;
        --text-5xl: 1.25rem;
        --text-4xl: 1.125rem;
        --text-3xl: 1rem;
        --spacing-5xl: 3rem;
        --spacing-4xl: 2rem;
    }
    
    .navbar {
        padding: var(--spacing-sm) 0;
    }
    
    .navbar-brand svg {
        height: 32px;
    }
    
    .mobile-menu {
        padding: var(--spacing-4xl) var(--spacing-lg);
    }
    
    .mobile-menu-nav .nav-link {
        font-size: var(--text-xl);
    }
    
    .hero {
        padding: 80px 0 50px;
    }
    
    .hero-title {
        font-size: var(--text-2xl);
    }
    
    .hero-description {
        font-size: var(--text-sm);
    }
    
    .hero-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .hero-stat-number {
        font-size: var(--text-xl);
    }
    
    .hero-stat-label {
        font-size: 0.65rem;
    }
    
    .section-badge {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.65rem;
    }
    
    .about-feature {
        padding: var(--spacing-md);
    }
    
    .about-feature-icon {
        width: 40px;
        height: 40px;
    }
    
    .about-feature-icon svg {
        width: 20px;
        height: 20px;
    }
    
    .about-feature-content h4 {
        font-size: var(--text-base);
    }
    
    .service-card {
        padding: var(--spacing-lg);
    }
    
    .service-card h3 {
        font-size: var(--text-lg);
    }
    
    .app-feature-item {
        flex-direction: column;
        text-align: center;
    }
    
    .app-feature-icon {
        margin: 0 auto;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    .stat-icon {
        width: 40px;
        height: 40px;
        margin-bottom: var(--spacing-md);
    }
    
    .stat-icon svg {
        width: 20px;
        height: 20px;
    }
    
    .stat-number {
        font-size: var(--text-2xl);
    }
    
    .stat-label {
        font-size: var(--text-sm);
    }
    
    .team-grid {
        grid-template-columns: 1fr;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .footer {
        padding-top: var(--spacing-3xl);
    }
    
    .footer-column h4 {
        margin-bottom: var(--spacing-lg);
    }
    
    .footer-links li {
        margin-bottom: var(--spacing-sm);
    }
    
    .page-header h1 {
        font-size: var(--text-3xl);
    }
    
    .page-header p {
        font-size: var(--text-base);
    }
    
    .value-card {
        padding: var(--spacing-xl);
    }
    
    .value-icon {
        width: 64px;
        height: 64px;
    }
    
    .value-icon svg {
        width: 32px;
        height: 32px;
    }
    
    .contact-icon {
        width: 48px;
        height: 48px;
    }
    
    .contact-icon svg {
        width: 24px;
        height: 24px;
    }
    
    .contact-item-content h4 {
        font-size: var(--text-base);
    }
    
    .news-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}

/* ==================== Extra Small (Below 320px) ==================== */
@media (max-width: 320px) {
    :root {
        --text-7xl: 1.5rem;
        --text-6xl: 1.25rem;
        --text-5xl: 1rem;
    }
    
    .hero-title {
        font-size: var(--text-xl);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--text-sm);
    }
    
    .hero-stat-number {
        font-size: var(--text-lg);
    }
}

/* ==================== Landscape Mode on Mobile ==================== */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 80px 0 40px;
    }
    
    .hero-visual {
        display: none;
    }
    
    .scroll-indicator {
        display: none;
    }
}

/* ==================== High DPI Screens ==================== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Crisp text and images for retina displays */
    body {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* ==================== Dark Mode Support ==================== */
@media (prefers-color-scheme: dark) {
    /* Automatic dark mode can be enabled here if needed */
}

/* ==================== Print Styles ==================== */
@media print {
    :root {
        --primary-color: #000;
        --gray-700: #000;
    }
    
    .navbar,
    .footer,
    .mobile-menu,
    .hero-buttons,
    .scroll-indicator {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }
    
    .section {
        padding: 20pt 0;
        page-break-inside: avoid;
    }
    
    h1, h2, h3, h4, h5, h6 {
        page-break-after: avoid;
    }
    
    img {
        max-width: 100%;
        page-break-inside: avoid;
    }
    
    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 10pt;
        color: #666;
    }
}

/* ==================== Accessibility ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus styles for accessibility */
@media (focus-visible) {
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    select:focus-visible {
        outline: 2px solid var(--primary-color);
        outline-offset: 2px;
    }
}

/* ==================== Touch Device Optimizations ==================== */
@media (hover: none) and (pointer: coarse) {
    /* Remove hover effects on touch devices */
    .hover-lift:hover,
    .hover-scale:hover,
    .hover-glow:hover {
        transform: none;
    }
    
    /* Larger touch targets */
    .nav-link,
    .btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Disable smooth scrolling */
    html {
        scroll-behavior: auto;
    }
    
    /* Hide scroll indicators */
    .scroll-indicator {
        display: none;
    }
    
    /* Show overlays by default on touch */
    .portfolio-overlay {
        opacity: 1;
    }
}

/* ==================== Smart TV / Large Screen ==================== */
@media (min-width: 1920px) {
    :root {
        --container-max: 1600px;
        --text-7xl: 5rem;
        --text-6xl: 4rem;
        --text-5xl: 3rem;
    }
    
    .hero-title {
        font-size: 5rem;
    }
    
    .hero-description {
        font-size: var(--text-2xl);
    }
    
    .section {
        padding: var(--spacing-5xl) 0;
    }
}

/* ==================== Tablet in Portrait ==================== */
@media (min-width: 600px) and (max-width: 900px) and (orientation: portrait) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==================== Tablet in Landscape ==================== */
@media (min-width: 800px) and (max-width: 1200px) and (orientation: landscape) {
    .hero-visual {
        display: block;
        opacity: 0.5;
    }
    
    .hero-content {
        max-width: 60%;
    }
}