/* ================================================
   Beijing Jingcheng Qice Enterprise Management Co., Ltd.
   Responsive Stylesheet
   ================================================ */

/* Extra Large Screens (1400px and above) */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }

    .hero h1 {
        font-size: 4.5rem;
    }

    .section {
        padding: 140px 0;
    }
}

/* Large Desktop (1200px - 1399px) */
@media (max-width: 1399px) {
    .container {
        max-width: 1140px;
        padding: 0 30px;
    }

    h1 { font-size: 3.2rem; }
    h2 { font-size: 2.3rem; }

    .services-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 30px;
    }

    .footer-content {
        grid-template-columns: 2fr 1fr 1fr;
        gap: 40px;
    }

    .app-showcase {
        gap: 60px;
    }

    .culture-values {
        gap: 30px;
    }
}

/* Desktop (992px - 1199px) */
@media (max-width: 1199px) {
    .container {
        max-width: 960px;
        padding: 0 25px;
    }

    h1 { font-size: 2.8rem; }
    h2 { font-size: 2.1rem; }
    h3 { font-size: 1.8rem; }

    .header .container {
        height: 70px;
    }

    .nav-menu {
        gap: 30px;
    }

    .logo {
        font-size: 1.3rem;
    }

    .logo svg {
        width: 45px;
        height: 45px;
    }

    .hero h1 {
        font-size: 2.8rem;
    }

    .hero p {
        font-size: 1.3rem;
    }

    .hero-buttons {
        gap: 15px;
    }

    .btn {
        padding: 14px 35px;
        font-size: 1rem;
    }

    .section {
        padding: 100px 0;
    }

    .section-header {
        margin-bottom: 60px;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .service-card {
        padding: 40px 30px;
    }

    .service-icon {
        width: 70px;
        height: 70px;
    }

    .service-icon svg {
        width: 35px;
        height: 35px;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .feature-item {
        padding: 30px 20px;
    }

    .feature-number {
        font-size: 3rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .stat-item {
        padding: 30px;
    }

    .stat-number {
        font-size: 2.8rem;
    }

    .news-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .news-image {
        height: 200px;
    }

    .culture-values {
        grid-template-columns: repeat(3, 1fr);
        gap: 25px;
    }

    .culture-card {
        padding: 50px 30px;
    }

    .culture-icon {
        width: 100px;
        height: 100px;
    }

    .culture-icon svg {
        width: 50px;
        height: 50px;
    }

    .contact-grid {
        gap: 40px;
    }

    .contact-info,
    .contact-form {
        padding: 40px;
    }

    .app-showcase {
        gap: 40px;
    }

    .app-content h3 {
        font-size: 2rem;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }

    .legal-content {
        padding: 50px;
    }
}

/* Tablet (768px - 991px) */
@media (max-width: 991px) {
    .container {
        max-width: 720px;
        padding: 0 20px;
    }

    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    h3 { font-size: 1.6rem; }

    .header .container {
        height: 65px;
    }

    .nav-menu {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .hero {
        min-height: 90vh;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        padding: 14px 30px;
    }

    .section {
        padding: 80px 0;
    }

    .section-header {
        margin-bottom: 50px;
    }

    .section-header p {
        font-size: 1.1rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .service-card {
        padding: 35px 25px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .feature-item {
        padding: 25px 20px;
    }

    .feature-number {
        font-size: 2.5rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stat-item {
        padding: 25px 20px;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .news-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .news-image {
        height: 180px;
    }

    .news-content {
        padding: 25px;
    }

    .culture-values {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .culture-card {
        padding: 40px 25px;
    }

    .culture-icon {
        width: 90px;
        height: 90px;
    }

    .culture-icon svg {
        width: 45px;
        height: 45px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .contact-info,
    .contact-form {
        padding: 35px;
    }

    .app-showcase {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .app-content h3 {
        font-size: 1.8rem;
    }

    .app-content p {
        font-size: 1.1rem;
    }

    .app-feature-item {
        padding: 15px;
    }

    .footer {
        padding: 60px 0 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .footer-brand h3 {
        font-size: 1.5rem;
    }

    .footer-links h4 {
        font-size: 1.1rem;
        margin-bottom: 20px;
    }

    .footer-links ul li {
        margin-bottom: 12px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .footer-legal {
        flex-direction: column;
        gap: 10px;
    }

    .legal-content {
        padding: 40px 25px;
    }

    .legal-content h1 {
        font-size: 2rem;
    }

    .legal-content h2 {
        font-size: 1.5rem;
        margin-top: 40px;
    }

    .legal-content h3 {
        font-size: 1.3rem;
        margin-top: 25px;
    }
}

/* Mobile Large (576px - 767px) */
@media (max-width: 767px) {
    .container {
        max-width: 100%;
        padding: 0 15px;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.8rem; }
    h3 { font-size: 1.4rem; }

    .header .container {
        height: 60px;
    }

    .logo {
        font-size: 1.2rem;
    }

    .logo svg {
        width: 40px;
        height: 40px;
    }

    .mobile-menu-btn span {
        width: 24px;
        height: 2.5px;
    }

    .mobile-menu {
        top: 60px;
        padding: 15px;
    }

    .mobile-menu a {
        padding: 12px 15px;
        font-size: 0.95rem;
    }

    .hero {
        min-height: 80vh;
        padding: 100px 0 60px;
    }

    .hero-content {
        padding: 20px;
    }

    .hero h1 {
        font-size: 2rem;
        margin-bottom: 15px;
    }

    .hero p {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .hero-buttons {
        gap: 12px;
    }

    .btn {
        padding: 12px 25px;
        font-size: 0.95rem;
    }

    .section {
        padding: 60px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .section-header h2::after {
        width: 60px;
        height: 3px;
    }

    .section-header p {
        font-size: 1rem;
        margin-top: 20px;
    }

    .services-grid {
        gap: 15px;
    }

    .service-card {
        padding: 30px 20px;
    }

    .service-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 20px;
    }

    .service-icon svg {
        width: 30px;
        height: 30px;
    }

    .service-card h3 {
        font-size: 1.3rem;
        margin-bottom: 15px;
    }

    .service-card p {
        font-size: 0.95rem;
    }

    .features-section .section-header {
        color: white;
    }

    .features-section .section-header p {
        color: rgba(255, 255, 255, 0.9);
    }

    .features-grid {
        gap: 15px;
    }

    .feature-item {
        padding: 20px 15px;
    }

    .feature-number {
        font-size: 2.2rem;
    }

    .feature-item h4 {
        font-size: 1.1rem;
    }

    .feature-item p {
        font-size: 0.9rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .stat-item {
        padding: 20px 15px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .stat-label {
        font-size: 0.9rem;
    }

    .news-grid {
        gap: 15px;
    }

    .news-image {
        height: 150px;
    }

    .news-content {
        padding: 20px;
    }

    .news-date {
        font-size: 0.85rem;
    }

    .news-card h3 {
        font-size: 1.2rem;
        margin-bottom: 12px;
    }

    .news-card p {
        font-size: 0.95rem;
    }

    .news-link {
        font-size: 0.95rem;
    }

    .culture-values {
        gap: 15px;
    }

    .culture-card {
        padding: 30px 20px;
    }

    .culture-icon {
        width: 80px;
        height: 80px;
        margin-bottom: 20px;
    }

    .culture-icon svg {
        width: 40px;
        height: 40px;
    }

    .culture-card h3 {
        font-size: 1.5rem;
        margin-bottom: 15px;
    }

    .culture-card p {
        font-size: 0.95rem;
    }

    .contact-grid {
        gap: 20px;
    }

    .contact-info,
    .contact-form {
        padding: 30px 20px;
    }

    .contact-info h3,
    .contact-form h3 {
        font-size: 1.6rem;
        margin-bottom: 20px;
    }

    .contact-item {
        padding: 15px;
        margin-bottom: 20px;
    }

    .contact-icon {
        width: 45px;
        height: 45px;
    }

    .contact-icon svg {
        width: 22px;
        height: 22px;
    }

    .contact-item h4 {
        font-size: 1rem;
    }

    .contact-item p {
        font-size: 0.95rem;
    }

    .form-group {
        margin-bottom: 20px;
    }

    .form-group label {
        font-size: 0.95rem;
        margin-bottom: 8px;
    }

    .form-group input,
    .form-group textarea {
        padding: 12px 15px;
        font-size: 0.95rem;
    }

    .form-btn {
        padding: 14px;
        font-size: 1rem;
    }

    .app-showcase {
        gap: 30px;
    }

    .app-content h3 {
        font-size: 1.6rem;
        margin-bottom: 20px;
    }

    .app-content p {
        font-size: 1rem;
        margin-bottom: 20px;
    }

    .app-features {
        gap: 15px;
    }

    .app-feature-item {
        padding: 15px;
        gap: 15px;
    }

    .app-feature-icon {
        width: 45px;
        height: 45px;
    }

    .app-feature-icon svg {
        width: 22px;
        height: 22px;
    }

    .app-feature-item h5 {
        font-size: 1rem;
    }

    .app-feature-item p {
        font-size: 0.85rem;
    }

    .footer {
        padding: 50px 0 20px;
    }

    .footer-content {
        gap: 25px;
    }

    .footer-brand h3 {
        font-size: 1.4rem;
        margin-bottom: 15px;
    }

    .footer-brand p {
        font-size: 0.95rem;
    }

    .footer-links h4 {
        font-size: 1rem;
        margin-bottom: 15px;
    }

    .footer-links ul li {
        margin-bottom: 10px;
    }

    .footer-links ul li a {
        font-size: 0.95rem;
    }

    .footer-bottom {
        padding-top: 20px;
    }

    .footer-bottom p {
        font-size: 0.9rem;
    }

    .legal-content {
        padding: 30px 15px;
        border-radius: 15px;
    }

    .legal-content h1 {
        font-size: 1.8rem;
        margin-bottom: 30px;
    }

    .legal-content h2 {
        font-size: 1.4rem;
        margin-top: 30px;
        margin-bottom: 15px;
    }

    .legal-content h3 {
        font-size: 1.2rem;
        margin-top: 20px;
        margin-bottom: 12px;
    }

    .legal-content p {
        font-size: 0.95rem;
        margin-bottom: 15px;
    }

    .legal-content ul li {
        font-size: 0.95rem;
        margin-bottom: 8px;
    }
}

/* Mobile Small (up to 575px) */
@media (max-width: 575px) {
    .container {
        padding: 0 12px;
    }

    h1 { font-size: 1.8rem; }
    h2 { font-size: 1.6rem; }
    h3 { font-size: 1.3rem; }

    .header .container {
        height: 55px;
    }

    .logo {
        font-size: 1rem;
    }

    .logo svg {
        width: 35px;
        height: 35px;
    }

    .mobile-menu-btn span {
        width: 22px;
        height: 2px;
    }

    .mobile-menu {
        top: 55px;
    }

    .mobile-menu a {
        padding: 10px 12px;
        font-size: 0.9rem;
    }

    .hero {
        min-height: 70vh;
        padding: 90px 0 50px;
    }

    .hero-content {
        padding: 15px;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 0.95rem;
    }

    .btn {
        padding: 11px 20px;
        font-size: 0.9rem;
    }

    .section {
        padding: 50px 0;
    }

    .section-header h2::after {
        width: 50px;
        height: 2px;
    }

    .section-header p {
        font-size: 0.95rem;
    }

    .service-card {
        padding: 25px 15px;
    }

    .service-icon {
        width: 55px;
        height: 55px;
        margin-bottom: 18px;
    }

    .service-icon svg {
        width: 28px;
        height: 28px;
    }

    .service-card h3 {
        font-size: 1.2rem;
    }

    .service-card p {
        font-size: 0.9rem;
    }

    .feature-item {
        padding: 18px 12px;
    }

    .feature-number {
        font-size: 2rem;
    }

    .feature-item h4 {
        font-size: 1rem;
    }

    .feature-item p {
        font-size: 0.85rem;
    }

    .stat-item {
        padding: 18px 12px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

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

    .news-image {
        height: 130px;
    }

    .news-content {
        padding: 18px;
    }

    .news-card h3 {
        font-size: 1.1rem;
    }

    .news-card p {
        font-size: 0.9rem;
    }

    .culture-card {
        padding: 25px 15px;
    }

    .culture-icon {
        width: 70px;
        height: 70px;
    }

    .culture-icon svg {
        width: 35px;
        height: 35px;
    }

    .culture-card h3 {
        font-size: 1.3rem;
    }

    .culture-card p {
        font-size: 0.9rem;
    }

    .contact-info,
    .contact-form {
        padding: 25px 15px;
    }

    .contact-info h3,
    .contact-form h3 {
        font-size: 1.4rem;
    }

    .contact-item {
        padding: 12px;
        margin-bottom: 15px;
    }

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

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

    .contact-item h4 {
        font-size: 0.95rem;
    }

    .contact-item p {
        font-size: 0.9rem;
    }

    .form-group input,
    .form-group textarea {
        padding: 10px 12px;
        font-size: 0.9rem;
    }

    .form-btn {
        padding: 12px;
        font-size: 0.95rem;
    }

    .app-content h3 {
        font-size: 1.4rem;
    }

    .app-content p {
        font-size: 0.95rem;
    }

    .app-feature-icon {
        width: 40px;
        height: 40px;
    }

    .app-feature-icon svg {
        width: 20px;
        height: 20px;
    }

    .app-feature-item h5 {
        font-size: 0.95rem;
    }

    .footer-brand h3 {
        font-size: 1.2rem;
    }

    .footer-brand p {
        font-size: 0.9rem;
    }

    .legal-content {
        padding: 25px 12px;
    }

    .legal-content h1 {
        font-size: 1.6rem;
    }

    .legal-content h2 {
        font-size: 1.3rem;
    }

    .legal-content h3 {
        font-size: 1.1rem;
    }

    .legal-content p,
    .legal-content ul li {
        font-size: 0.9rem;
    }
}

/* Touch Device Optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn:hover {
        transform: none;
    }

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

    .service-card:hover::before {
        transform: scaleX(1);
    }

    .service-card:hover .service-icon {
        transform: none;
    }

    .service-card:hover {
        box-shadow: var(--shadow-hover);
    }

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

    .news-card:hover {
        box-shadow: var(--shadow-hover);
    }

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

    .culture-card:hover {
        box-shadow: var(--shadow-hover);
    }

    .contact-item:hover {
        transform: none;
    }

    .app-feature-item:hover {
        transform: none;
    }
}

/* High DPI Displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero,
    .features-section,
    .bg-animated {
        background-size: 200% 200%;
    }
}

/* Print Styles */
@media print {
    .header,
    .hero,
    .mobile-menu,
    .footer,
    .contact-form,
    .form-btn,
    .btn {
        display: none !important;
    }

    .section {
        padding: 30px 0;
    }

    .legal-content {
        box-shadow: none;
        padding: 0;
    }

    body {
        font-size: 12pt;
        line-height: 1.6;
    }
}

/* Accessibility - Reduced Motion */
@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;
    }

    .scroll-animate,
    .scroll-animate-left,
    .scroll-animate-right,
    .scroll-animate-scale {
        opacity: 1;
        transform: none;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #e0e0e0;
        --text-secondary: #b0b0b0;
        --text-light: #808080;
        --background-light: #1a1a2e;
        --background-white: #2d2d44;
        --border-color: #404060;
    }

    .header {
        background: rgba(45, 45, 68, 0.95);
    }

    .service-card,
    .stat-item,
    .news-card,
    .culture-card,
    .contact-info,
    .contact-form,
    .legal-content {
        background: var(--background-white);
    }

    .app-feature-item,
    .contact-item {
        background: var(--background-light);
    }

    .app-feature-item:hover,
    .contact-item:hover {
        background: var(--background-white);
    }

    .form-group input,
    .form-group textarea {
        background: var(--background-light);
        border-color: var(--border-color);
    }
}