/* ============================================
   响应式样式文件
   ============================================ */

/* ============================================
   Large Screens (1440px and above)
   ============================================ */

@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }

    .hero-title .title-line {
        font-size: 5rem;
    }

    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .products-showcase {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-stats {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ============================================
   Desktop (1024px - 1439px)
   ============================================ */

@media (max-width: 1439px) and (min-width: 1024px) {
    .container {
        max-width: 1200px;
    }

    .hero-title .title-line {
        font-size: 3.5rem;
    }

    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .products-showcase {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

/* ============================================
   Tablet (768px - 1023px)
   ============================================ */

@media (max-width: 1023px) and (min-width: 768px) {
    html {
        font-size: 15px;
    }

    .container {
        max-width: 900px;
        padding: 0 var(--spacing-md);
    }

    /* Navigation */
    .nav-menu {
        gap: var(--spacing-md);
    }

    .nav-link {
        font-size: 0.9rem;
    }

    /* Hero */
    .hero-title .title-line {
        font-size: 2.8rem;
    }

    .hero-title .title-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    /* About */
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-item {
        padding: var(--spacing-sm);
    }

    .stat-number {
        font-size: 1.5rem;
    }

    /* Services */
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .service-card {
        padding: var(--spacing-lg);
    }

    /* Products */
    .products-showcase {
        grid-template-columns: 1fr;
        max-width: 600px;
        margin: 0 auto;
    }

    /* Contact */
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .contact-info {
        order: 2;
    }

    .contact-message {
        order: 1;
    }

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-links {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
}

/* ============================================
   Mobile Large (576px - 767px)
   ============================================ */

@media (max-width: 767px) and (min-width: 576px) {
    html {
        font-size: 14px;
    }

    .container {
        max-width: 700px;
        padding: 0 var(--spacing-sm);
    }

    /* Navigation */
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        width: 100%;
        height: calc(100vh - 60px);
        background: rgba(10, 25, 41, 0.95);
        backdrop-filter: var(--blur-bg);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        gap: var(--spacing-md);
        padding-top: var(--spacing-xl);
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-link {
        font-size: 1.2rem;
        padding: var(--spacing-sm);
    }

    /* Hero */
    .hero-section {
        min-height: 80vh;
    }

    .hero-content {
        padding: var(--spacing-lg);
    }

    .hero-title .title-line {
        font-size: 2.2rem;
    }

    .hero-title .title-subtitle {
        font-size: 1rem;
        letter-spacing: 2px;
    }

    .hero-description {
        font-size: 0.95rem;
        max-width: 500px;
    }

    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .scroll-indicator {
        display: none;
    }

    /* Section Headers */
    .section-header {
        margin-bottom: var(--spacing-lg);
    }

    h2 {
        font-size: 2rem;
    }

    /* About */
    .about-section {
        padding: var(--spacing-lg) 0;
    }

    .intro-highlight {
        font-size: 1.1rem;
    }

    .about-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .stat-item {
        padding: var(--spacing-sm);
    }

    .stat-number {
        font-size: 1.3rem;
    }

    .stat-label {
        font-size: 0.85rem;
    }

    .locations-list {
        gap: var(--spacing-sm);
    }

    /* Services */
    .services-section {
        padding: var(--spacing-lg) 0;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .service-card {
        padding: var(--spacing-md);
    }

    .service-icon {
        width: 50px;
        height: 50px;
    }

    /* Products */
    .products-section {
        padding: var(--spacing-lg) 0;
    }

    .products-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .product-image {
        height: 150px;
    }

    /* Contact */
    .contact-section {
        padding: var(--spacing-lg) 0;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .contact-card {
        padding: var(--spacing-md);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer {
        padding: var(--spacing-lg) 0 var(--spacing-sm);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-column {
        text-align: center;
    }

    .footer-bottom {
        padding-top: var(--spacing-sm);
    }
}

/* ============================================
   Mobile Small (375px - 575px)
   ============================================ */

@media (max-width: 575px) {
    html {
        font-size: 13px;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    /* Navigation */
    .nav-container {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .logo-text {
        font-size: 1.2rem;
    }

    .nav-menu {
        top: 50px;
        height: calc(100vh - 50px);
        padding-top: var(--spacing-lg);
    }

    /* Hero */
    .hero-section {
        min-height: 70vh;
    }

    .hero-content {
        padding: var(--spacing-md);
    }

    .hero-title .title-line {
        font-size: 1.8rem;
        line-height: 1.2;
    }

    .hero-title .title-subtitle {
        font-size: 0.9rem;
        letter-spacing: 1px;
    }

    .hero-description {
        font-size: 0.85rem;
        line-height: 1.6;
    }

    .hero-buttons {
        gap: var(--spacing-xs);
    }

    /* Section Headers */
    .section-header {
        margin-bottom: var(--spacing-md);
    }

    h2 {
        font-size: 1.8rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    /* About */
    .about-section {
        padding: var(--spacing-md) 0;
    }

    .intro-highlight {
        font-size: 1rem;
    }

    .about-description p {
        font-size: 0.9rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }

    .stat-item {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-sm);
    }

    .stat-number {
        font-size: 1.2rem;
    }

    .locations-list {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    /* Services */
    .services-section {
        padding: var(--spacing-md) 0;
    }

    .services-grid {
        gap: var(--spacing-sm);
    }

    .service-card {
        padding: var(--spacing-sm);
    }

    .service-icon {
        width: 40px;
        height: 40px;
    }

    .service-title {
        font-size: 1.1rem;
    }

    .service-description {
        font-size: 0.85rem;
    }

    /* Products */
    .products-section {
        padding: var(--spacing-md) 0;
    }

    .products-showcase {
        gap: var(--spacing-sm);
    }

    .product-image {
        height: 120px;
    }

    .product-content {
        padding: var(--spacing-sm);
    }

    .product-title {
        font-size: 1.2rem;
    }

    .product-tags {
        flex-wrap: wrap;
    }

    .tag {
        font-size: 0.75rem;
        padding: 4px 8px;
    }

    .product-description {
        font-size: 0.85rem;
    }

    /* Contact */
    .contact-section {
        padding: var(--spacing-md) 0;
    }

    .contact-card {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: var(--spacing-sm);
    }

    .contact-icon {
        width: 30px;
        height: 30px;
    }

    .contact-details h3 {
        font-size: 1rem;
    }

    .contact-details p {
        font-size: 0.85rem;
    }

    .contact-message {
        padding: var(--spacing-sm);
    }

    .contact-message h3 {
        font-size: 1.2rem;
        margin-bottom: var(--spacing-sm);
    }

    .form-group input,
    .form-group textarea {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    /* Footer */
    .footer {
        padding: var(--spacing-md) 0 var(--spacing-xs);
    }

    .footer-content {
        gap: var(--spacing-sm);
    }

    .footer-logo {
        text-align: center;
    }

    .footer-description {
        text-align: center;
        font-size: 0.85rem;
    }

    .footer-links {
        gap: var(--spacing-sm);
    }

    .footer-column h4 {
        font-size: 1rem;
        margin-bottom: var(--spacing-xs);
    }

    .footer-column a {
        font-size: 0.85rem;
    }

    .copyright {
        font-size: 0.75rem;
    }
}

/* ============================================
   Extra Small Screens (< 375px)
   ============================================ */

@media (max-width: 374px) {
    html {
        font-size: 12px;
    }

    .hero-title .title-line {
        font-size: 1.5rem;
    }

    .hero-title .title-subtitle {
        font-size: 0.8rem;
    }

    .btn {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
}

/* ============================================
   High Resolution Screens
   ============================================ */

@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    /* Ensure crisp rendering on high-DPI screens */
    .service-icon svg,
    .stat-icon svg,
    .contact-icon svg {
        shape-rendering: crispEdges;
    }
}

/* ============================================
   Landscape Orientation for Mobile
   ============================================ */

@media (max-width: 767px) and (orientation: landscape) {
    .hero-section {
        min-height: 100vh;
    }

    .hero-title .title-line {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: row;
    }

    .btn {
        width: auto;
        max-width: none;
    }

    .about-stats {
        grid-template-columns: repeat(4, 1fr);
    }

    .stat-item {
        flex-direction: column;
        text-align: center;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .products-showcase {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-content {
        grid-template-columns: 1fr 1fr;
    }
}

/* ============================================
   Touch Device Optimizations
   ============================================ */

@media (hover: none) and (pointer: coarse) {
    /* Increase touch targets */
    .btn {
        min-height: 44px;
        min-width: 44px;
    }

    .nav-link {
        padding: 12px;
    }

    .service-card,
    .product-card,
    .contact-card {
        min-height: 44px;
    }

    /* Remove hover effects on touch devices */
    .service-card:hover {
        transform: none;
    }

    .product-card:hover {
        transform: none;
    }

    .btn:hover {
        transform: none;
    }

    /* Add active states for touch feedback */
    .btn:active {
        transform: scale(0.95);
    }

    .service-card:active,
    .product-card:active {
        transform: scale(0.98);
    }
}

/* ============================================
   Reduced Motion Preference
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .hero-title .title-line {
        animation: none;
    }

    .scroll-indicator {
        animation: none;
    }

    .wheel {
        animation: none;
    }
}

/* ============================================
   Print Styles
   ============================================ */

@media print {
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }

    .navbar,
    .hero-section,
    .scroll-indicator,
    #particleCanvas {
        display: none !important;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    a {
        text-decoration: underline;
    }

    a[href^="#"]::after {
        content: " (" attr(href) ")";
    }
}