/* ========================================
   Guangzhou Chengzou Trading Co., Ltd.
   Responsive Stylesheet
   ======================================== */

/* ========================================
   LARGE DESKTOP (1400px and above)
   ======================================== */
@media (min-width: 1400px) {
    .container {
        max-width: 1320px;
    }

    h1 {
        font-size: 4.5rem;
    }

    h2 {
        font-size: 3rem;
    }

    .hero-content {
        max-width: 1100px;
    }

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

    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }
}

/* ========================================
   DESKTOP (1024px - 1399px)
   ======================================== */
@media (min-width: 1024px) and (max-width: 1399px) {
    .container {
        padding: 0 30px;
    }

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

    .app-showcase {
        gap: 60px;
    }
}

/* ========================================
   TABLET (768px - 1023px)
   ======================================== */
@media (min-width: 768px) and (max-width: 1023px) {
    :root {
        --container-max: 100%;
    }

    .container {
        padding: 0 25px;
    }

    /* Header */
    .header {
        padding: 15px 0;
    }

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

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

    .nav-menu {
        gap: 25px;
    }

    .nav-menu a {
        font-size: 0.9rem;
    }

    /* Hero */
    .hero {
        min-height: 90vh;
    }

    .hero-badge {
        padding: 8px 20px;
        margin-bottom: 25px;
    }

    .hero-badge span {
        font-size: 0.8rem;
    }

    .hero-description {
        font-size: 1.1rem;
        margin-bottom: 40px;
    }

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

    .btn {
        padding: 15px 35px;
        font-size: 0.95rem;
        width: 100%;
        max-width: 300px;
    }

    /* Sections */
    .section {
        padding: 80px 0;
    }

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

    .section-badge {
        padding: 6px 15px;
        font-size: 0.75rem;
    }

    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .service-card {
        padding: 30px;
    }

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

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

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

    /* App Showcase */
    .app-showcase {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .app-features {
        grid-template-columns: 1fr;
    }

    .app-preview {
        order: -1;
    }

    .phone-mockup {
        max-width: 320px;
    }

    /* Values */
    .values-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }

    .value-card {
        padding: 30px;
    }

    .value-icon {
        width: 80px;
        height: 80px;
    }

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

    /* Timeline */
    .timeline {
        padding: 30px 0;
    }

    .timeline-content {
        padding: 25px;
    }

    /* News */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .news-image {
        height: 200px;
    }

    /* Contact */
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

    /* Footer */
    .footer {
        padding: 60px 0 25px;
    }

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

    .footer-brand {
        grid-column: span 2;
    }

    .footer-links h4 {
        font-size: 1rem;
        margin-bottom: 20px;
    }

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

    .footer-links ul li a {
        font-size: 0.9rem;
    }

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

    .footer-legal {
        justify-content: center;
    }

    /* Page Header */
    .page-header {
        padding: 150px 0 80px;
    }

    /* Legal Content */
    .legal-content {
        padding: 60px 20px;
    }

    .legal-content h2 {
        font-size: 1.5rem;
        margin: 40px 0 15px;
    }

    .legal-content h3 {
        font-size: 1.2rem;
        margin: 25px 0 12px;
    }

    .legal-content p {
        font-size: 1rem;
    }
}

/* ========================================
   MOBILE (576px - 767px)
   ======================================== */
@media (min-width: 576px) and (max-width: 767px) {
    :root {
        --container-max: 100%;
        --border-radius: 15px;
    }

    .container {
        padding: 0 20px;
    }

    /* Header */
    .header {
        padding: 12px 0;
    }

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

    .logo-text {
        font-size: 1.1rem;
    }

    .nav-menu {
        width: 85%;
        max-width: 320px;
        padding: 80px 30px;
        gap: 25px;
    }

    .nav-menu a {
        font-size: 1.1rem;
        padding: 8px 0;
    }

    .mobile-menu-btn {
        padding: 8px;
    }

    .mobile-menu-btn span {
        width: 25px;
    }

    /* Hero */
    .hero {
        min-height: 85vh;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-badge {
        padding: 6px 18px;
        margin-bottom: 20px;
    }

    .hero-badge span {
        font-size: 0.7rem;
        letter-spacing: 1px;
    }

    .hero-description {
        font-size: 1rem;
        margin-bottom: 35px;
        line-height: 1.6;
    }

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

    .btn {
        padding: 14px 30px;
        font-size: 0.9rem;
        width: 100%;
        max-width: 280px;
    }

    /* Sections */
    .section {
        padding: 60px 0;
    }

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

    .section-badge {
        padding: 5px 12px;
        font-size: 0.7rem;
        letter-spacing: 1px;
    }

    h2 {
        font-size: 1.8rem;
    }

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

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

    .service-card {
        padding: 25px;
    }

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

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

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

    .service-card p {
        font-size: 0.9rem;
        line-height: 1.6;
    }

    .service-number {
        font-size: 2.5rem;
        top: 15px;
        right: 15px;
    }

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

    .app-content h2 {
        font-size: 1.8rem;
        margin-bottom: 20px;
    }

    .app-content > p {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .app-features {
        grid-template-columns: 1fr;
        gap: 15px;
        margin-bottom: 30px;
    }

    .app-feature span {
        font-size: 0.9rem;
    }

    .app-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .app-store-btn {
        padding: 10px 20px;
    }

    .phone-mockup {
        max-width: 280px;
    }

    .phone-frame {
        padding: 12px;
        border-radius: 30px;
    }

    .phone-screen {
        border-radius: 22px;
    }

    .phone-glow {
        width: 200px;
        height: 200px;
    }

    /* Values */
    .values-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .value-card {
        padding: 25px;
    }

    .value-icon {
        width: 70px;
        height: 70px;
        margin-bottom: 20px;
    }

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

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

    /* Timeline */
    .timeline {
        padding: 20px 0;
    }

    .timeline-item {
        margin-bottom: 35px;
    }

    .timeline-content {
        padding: 20px;
        max-width: 100%;
    }

    .timeline-dot {
        width: 16px;
        height: 16px;
    }

    .timeline-year {
        padding: 4px 12px;
        font-size: 0.8rem;
        margin-bottom: 12px;
    }

    .timeline-content h4 {
        font-size: 1.1rem;
        margin-bottom: 8px;
    }

    .timeline-content p {
        font-size: 0.9rem;
    }

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

    .news-image {
        height: 180px;
    }

    .news-image svg {
        width: 50px;
        height: 50px;
    }

    .news-category {
        padding: 4px 12px;
        font-size: 0.7rem;
    }

    .news-content {
        padding: 20px;
    }

    .news-card h3 {
        font-size: 1.15rem;
        margin-bottom: 12px;
    }

    .news-card p {
        font-size: 0.9rem;
        margin-bottom: 15px;
    }

    /* Contact */
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

    .contact-info h3,
    .contact-form h3 {
        font-size: 1.3rem;
        margin-bottom: 25px;
    }

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

    .contact-icon {
        width: 45px;
        height: 45px;
        border-radius: 12px;
    }

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

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

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

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

    .form-group label {
        font-size: 0.9rem;
        margin-bottom: 8px;
    }

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

    .form-group textarea {
        min-height: 120px;
    }

    /* Footer */
    .footer {
        padding: 50px 0 20px;
    }

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

    .footer-brand .logo {
        margin-bottom: 15px;
    }

    .footer-brand p {
        font-size: 0.9rem;
        margin-bottom: 20px;
    }

    .footer-social {
        justify-content: center;
    }

    .footer-social a {
        width: 40px;
        height: 40px;
    }

    .footer-social a svg {
        width: 20px;
        height: 20px;
    }

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

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

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

    .footer-links ul li a {
        font-size: 0.9rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        padding-top: 25px;
    }

    .footer-bottom p {
        font-size: 0.85rem;
    }

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

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

    /* Page Header */
    .page-header {
        padding: 120px 0 60px;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .page-header p {
        font-size: 1rem;
    }

    /* Legal Content */
    .legal-content {
        padding: 40px 15px;
    }

    .legal-content h2 {
        font-size: 1.3rem;
        margin: 30px 0 12px;
    }

    .legal-content h3 {
        font-size: 1.1rem;
        margin: 20px 0 10px;
    }

    .legal-content p {
        font-size: 0.95rem;
        line-height: 1.7;
        margin-bottom: 15px;
    }

    .legal-content ul {
        padding-left: 25px;
    }

    .legal-content ul li {
        font-size: 0.95rem;
        padding-left: 20px;
        margin-bottom: 10px;
    }

    .legal-content ul li::before {
        width: 6px;
        height: 6px;
        top: 8px;
    }
}

/* ========================================
   SMALL MOBILE (below 575px)
   ======================================== */
@media (max-width: 575px) {
    :root {
        --container-max: 100%;
        --border-radius: 12px;
    }

    .container {
        padding: 0 15px;
    }

    /* Header */
    .header {
        padding: 10px 0;
    }

    .logo svg {
        width: 32px;
        height: 32px;
    }

    .logo-text {
        font-size: 1rem;
    }

    .nav-menu {
        width: 100%;
        max-width: 100%;
        padding: 70px 25px;
        gap: 20px;
    }

    .nav-menu a {
        font-size: 1rem;
        padding: 6px 0;
    }

    .mobile-menu-btn {
        padding: 6px;
    }

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

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

    .hero-content {
        max-width: 100%;
    }

    .hero-badge {
        padding: 5px 15px;
        margin-bottom: 18px;
        gap: 8px;
    }

    .hero-badge span {
        font-size: 0.65rem;
        letter-spacing: 1px;
    }

    .hero h1 {
        font-size: 2rem;
        margin-bottom: 20px;
    }

    .hero-description {
        font-size: 0.95rem;
        margin-bottom: 30px;
        line-height: 1.6;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .btn {
        padding: 12px 25px;
        font-size: 0.85rem;
        width: 100%;
        max-width: 250px;
    }

    .btn svg {
        width: 18px;
        height: 18px;
    }

    /* Sections */
    .section {
        padding: 50px 0;
    }

    .section-header {
        margin-bottom: 35px;
    }

    .section-badge {
        padding: 4px 10px;
        font-size: 0.65rem;
        letter-spacing: 1px;
    }

    h2 {
        font-size: 1.6rem;
        margin-bottom: 15px;
    }

    .section-description {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .service-card {
        padding: 22px;
    }

    .service-icon {
        width: 55px;
        height: 55px;
        border-radius: 15px;
        margin-bottom: 18px;
    }

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

    .service-card h3 {
        font-size: 1.1rem;
        margin-bottom: 10px;
    }

    .service-card p {
        font-size: 0.85rem;
        line-height: 1.5;
    }

    .service-number {
        font-size: 2rem;
        top: 12px;
        right: 12px;
    }

    /* App Showcase */
    .app-showcase {
        grid-template-columns: 1fr;
        gap: 35px;
    }

    .app-content h2 {
        font-size: 1.6rem;
        margin-bottom: 18px;
    }

    .app-content > p {
        font-size: 0.95rem;
        margin-bottom: 25px;
        line-height: 1.6;
    }

    .app-features {
        grid-template-columns: 1fr;
        gap: 12px;
        margin-bottom: 25px;
    }

    .app-feature {
        gap: 12px;
    }

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

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

    .app-buttons {
        flex-direction: column;
        gap: 12px;
    }

    .app-store-btn {
        padding: 10px 18px;
        border-radius: 10px;
    }

    .app-store-btn svg {
        width: 24px;
        height: 24px;
    }

    .app-store-btn .store-label {
        font-size: 0.65rem;
    }

    .app-store-btn .store-name {
        font-size: 0.9rem;
    }

    .phone-mockup {
        max-width: 250px;
    }

    .phone-frame {
        padding: 10px;
        border-radius: 25px;
    }

    .phone-screen {
        border-radius: 18px;
    }

    .phone-screen-content {
        padding: 20px;
    }

    .phone-screen-content svg {
        width: 60px;
        height: 60px;
        margin-bottom: 15px;
    }

    .phone-screen-content p {
        font-size: 0.85rem;
    }

    .phone-glow {
        width: 180px;
        height: 180px;
    }

    /* Values */
    .values-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .value-card {
        padding: 22px;
    }

    .value-icon {
        width: 65px;
        height: 65px;
        margin-bottom: 18px;
    }

    .value-icon svg {
        width: 32px;
        height: 32px;
    }

    .value-card h3 {
        font-size: 1.1rem;
        margin-bottom: 10px;
    }

    .value-card p {
        font-size: 0.85rem;
        line-height: 1.5;
    }

    /* Timeline */
    .timeline {
        padding: 15px 0;
    }

    .timeline::before {
        width: 2px;
    }

    .timeline-item,
    .timeline-item:nth-child(even) {
        padding-left: 45px;
        padding-right: 0;
        justify-content: flex-start;
        margin-bottom: 30px;
    }

    .timeline-content {
        padding: 18px;
        max-width: 100%;
    }

    .timeline-dot,
    .timeline-item:nth-child(even) .timeline-dot {
        left: -25px;
        right: auto;
        transform: none;
        width: 14px;
        height: 14px;
        top: 25px;
    }

    .timeline-year {
        padding: 3px 10px;
        font-size: 0.75rem;
        margin-bottom: 10px;
    }

    .timeline-content h4 {
        font-size: 1rem;
        margin-bottom: 8px;
    }

    .timeline-content p {
        font-size: 0.85rem;
        line-height: 1.5;
    }

    /* News */
    .news-grid {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .news-image {
        height: 160px;
    }

    .news-image svg {
        width: 45px;
        height: 45px;
    }

    .news-category {
        padding: 3px 10px;
        font-size: 0.65rem;
        top: 12px;
        left: 12px;
    }

    .news-content {
        padding: 18px;
    }

    .news-date {
        font-size: 0.8rem;
        margin-bottom: 8px;
    }

    .news-card h3 {
        font-size: 1.05rem;
        margin-bottom: 10px;
    }

    .news-card p {
        font-size: 0.85rem;
        line-height: 1.5;
        margin-bottom: 12px;
    }

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

    .news-link svg {
        width: 16px;
        height: 16px;
    }

    /* Contact */
    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .contact-info,
    .contact-form {
        padding: 22px;
    }

    .contact-info h3,
    .contact-form h3 {
        font-size: 1.2rem;
        margin-bottom: 20px;
    }

    .contact-item {
        margin-bottom: 18px;
        gap: 15px;
    }

    .contact-icon {
        width: 42px;
        height: 42px;
        border-radius: 10px;
    }

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

    .contact-item h4 {
        font-size: 0.9rem;
        margin-bottom: 4px;
    }

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

    .form-group {
        margin-bottom: 18px;
    }

    .form-group label {
        font-size: 0.85rem;
        margin-bottom: 8px;
    }

    .form-group input,
    .form-group textarea {
        padding: 12px 14px;
        font-size: 0.9rem;
        border-radius: 10px;
    }

    .form-group textarea {
        min-height: 100px;
    }

    /* Footer */
    .footer {
        padding: 40px 0 15px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .footer-brand .logo {
        margin-bottom: 12px;
    }

    .footer-brand p {
        font-size: 0.85rem;
        margin-bottom: 18px;
        line-height: 1.5;
    }

    .footer-social {
        justify-content: center;
    }

    .footer-social a {
        width: 38px;
        height: 38px;
        border-radius: 10px;
    }

    .footer-social a svg {
        width: 18px;
        height: 18px;
    }

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

    .footer-links h4 {
        font-size: 0.95rem;
        margin-bottom: 12px;
    }

    .footer-links ul li {
        margin-bottom: 8px;
    }

    .footer-links ul li a {
        font-size: 0.85rem;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        padding-top: 20px;
    }

    .footer-bottom p {
        font-size: 0.8rem;
    }

    .footer-legal {
        flex-direction: column;
        gap: 8px;
        align-items: center;
    }

    .footer-legal a {
        font-size: 0.8rem;
    }

    /* Page Header */
    .page-header {
        padding: 100px 0 50px;
    }

    .page-header h1 {
        font-size: 1.8rem;
        margin-bottom: 15px;
    }

    .page-header p {
        font-size: 0.95rem;
        line-height: 1.5;
    }

    /* Legal Content */
    .legal-content {
        padding: 30px 12px;
    }

    .legal-content h2 {
        font-size: 1.2rem;
        margin: 25px 0 10px;
    }

    .legal-content h3 {
        font-size: 1rem;
        margin: 18px 0 8px;
    }

    .legal-content p {
        font-size: 0.9rem;
        line-height: 1.6;
        margin-bottom: 12px;
    }

    .legal-content ul {
        padding-left: 20px;
    }

    .legal-content ul li {
        font-size: 0.9rem;
        padding-left: 18px;
        margin-bottom: 8px;
    }

    .legal-content ul li::before {
        width: 5px;
        height: 5px;
        top: 7px;
    }

    .legal-content strong {
        font-size: 0.9rem;
    }
}

/* ========================================
   ORIENTATION LANDSCAPE (Mobile)
   ======================================== */
@media (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: auto;
        padding: 100px 0 60px;
    }

    .hero-content {
        max-width: 800px;
    }

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

    .hero-description {
        font-size: 0.95rem;
        margin-bottom: 25px;
    }

    .hero-buttons {
        flex-direction: row;
        justify-content: center;
    }

    .btn {
        width: auto;
        max-width: none;
        padding: 12px 25px;
    }
}

/* ========================================
   HIGH DPI DISPLAYS
   ======================================== */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .hero-bg,
    .news-image,
    .app-section {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

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

    html {
        scroll-behavior: auto;
    }

    .particle,
    .particle-item {
        animation: none;
    }

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

/* ========================================
   PRINT STYLES
   ======================================== */
@media print {
    .header,
    .footer,
    .hero-buttons,
    .app-buttons,
    .contact-form,
    .mobile-menu-btn {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }

    .section {
        padding: 30px 0;
    }

    .container {
        max-width: 100%;
    }

    a {
        color: black;
        text-decoration: underline;
    }
}