/* ============================================
   responsive.css — Centralized Media Queries
   4 breakpoints: 480px, 768px, 1024px, 1200px
   ============================================ */

@media (max-width: 480px) {
            .hero-stats {
                align-items: center;
            }

            .stat-item {
                text-align: center;
            }

            .stat-number {
                font-size: 32px;
            }

            .scenario-card {
                padding: 24px;
            }

            .case-card {
                border-radius: 12px;
            }

            .case-content {
                padding: 24px;
            }

            .case-metrics {
                grid-template-columns: 1fr;
            }
        }

@media (max-width: 480px) {
            .hero-badge {
                font-size: 12px;
                padding: 6px 16px;
            }

            .hero-title {
                font-size: 28px;
            }

            .contact-card {
                padding: 24px;
            }

            .contact-icon {
                width: 48px;
                height: 48px;
                font-size: 24px;
            }

            .faq-question {
                padding: 20px 24px;
            }

            .faq-question-text {
                font-size: 16px;
            }

            .form-container {
                padding: 24px 16px;
            }
        }

@media (max-width: 480px) {
    .mobile-menu {
        width: 100%;
        max-width: 100%;
    }

    .mobile-nav-link {
        font-size: 15px;
        padding: 14px 20px;
    }

    .mobile-submenu-link {
        font-size: 13px;
        padding: 12px 20px 12px 36px;
    }
}

@media (max-width: 480px) {
    .hero-badge {
        font-size: 12px;
        padding: 6px 16px;
    }

    .hero-title {
        font-size: 28px;
    }

    .stat-card {
        padding: 16px;
    }

    .stat-number {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .news-list-section {
padding: 40px 20px;
background: var(--white);
}
.news-grid {
display: grid
;
grid-template-columns: repeat(1, 1fr);
gap: 30px;
}
.page-header h1 {
font-size: 24px;
font-weight: bold;
color: var(--text-primary);
margin-bottom: 12px;
}
.article-section {
padding: 20px 10px;
background: var(--white);
}
.article-content img {
max-width: 70%;
height: auto;
border-radius: 8px;
/* margin: 30px 0; */
box-shadow: var(--shadow-light);
}
.related-grid {
display: grid
;
grid-template-columns: repeat(1, 1fr);
gap: 30px;
}
    .hero-badge {
        font-size: 12px;
        padding: 6px 16px;
    }

    .hero-title {
        font-size: 28px;
    }

    .contact-card {
        padding: 24px;
    }

    .contact-icon {
        width: 48px;
        height: 48px;
        font-size: 24px;
    }

    .faq-question {
        padding: 20px 24px;
    }

    .faq-question-text {
        font-size: 16px;
    }

    .form-container {
        padding: 24px 16px;
    }
}

@media (max-width: 768px) {
            .top-bar {
                display: none;
            }

            .nav-links {
                display: none;
            }

            .industry-hero {
                padding: 80px 20px 60px;
            }

            .hero-title {
                font-size: 36px;
            }

            .hero-subtitle {
                font-size: 16px;
            }

            .hero-stats {
                flex-direction: column;
                gap: 30px;
            }

            .section-title {
                font-size: 32px;
            }

            .overview-text {
                font-size: 15px;
            }

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

            .scenarios-grid {
                grid-template-columns: 1fr;
            }

            .advantage-item {
                padding: 30px;
                gap: 20px;
            }

            .solution-card {
                grid-template-columns: 1fr;
            }

            .solution-visual,
            .solution-info {
                padding: 40px 20px;
            }

            .footer-content {
                grid-template-columns: 1fr;
                padding: 0 20px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 20px;
                padding: 30px 20px;
            }

            .cta-title {
                font-size: 28px;
            }
        }

@media (max-width: 768px) {
            .hero-section {
                padding: 60px 0;
            }

            .hero-title {
                font-size: 32px;
            }

            .hero-subtitle {
                font-size: 16px;
            }

            .challenge-grid,
            .products-grid,
            .advantages-grid {
                grid-template-columns: 1fr;
            }

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

            .footer-bottom {
                flex-direction: column;
                gap: 20px;
                text-align: center;
            }

            .nav-menu {
                display: none;
            }
        }

@media (max-width: 768px) {
    .contact-hero {
        padding: 60px 0 40px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 32px;
    }

    .contact-section {
        padding: 60px 0;
    }

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

    .locations-grid {
        grid-template-columns: 1fr;
    }

    .form-container {
        padding: 32px 24px;
    }
}

@media (max-width: 768px) {
    /* 新增：隐藏桌面端CTA（移动端菜单内有专属CTA）*/
    .nav-content > .cta-button {
        display: none;
    }
    .mobile-menu-button {
        display: block;
    }

    .mobile-menu-overlay {
        display: block;
    }

    .mobile-menu {
        display: block;
    }

    .nav-links {
        display: none;
    }

    /* 顶部信息栏在移动端隐藏 */
    .top-bar {
        display: none;
    }

    /* 调整导航栏高度 */
    .main-nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
    }

    .nav-content {
        padding: 0 20px;
    }

    /* 添加顶部占位，防止内容被导航栏遮挡 */
    body {
        padding-top: 80px;
    }
}

@media (max-width: 768px) {
            .specs-section {
                padding: 80px 20px 100px;
            }

            .specs-section .section-header h2 {
                font-size: 32px;
            }

            .specs-section .section-header p {
                font-size: 16px;
            }

            .specs-table-container {
                border-radius: 12px;
            }

            .specs-table-container h3 {
                padding: 20px 24px;
                font-size: 18px;
            }

            .specs-table td {
                padding: 16px 20px;
                font-size: 14px;
            }

            .specs-table td:first-child {
                width: 35%;
            }
        }

@media (max-width: 768px) {
            .specs-section {
                padding: 80px 20px 100px;
            }

            .specs-section .section-header h2 {
                font-size: 32px;
            }

            .specs-grid {
                grid-template-columns: 1fr;
            }

            .specs-card {
                margin-bottom: 20px;
            }
        }

@media (max-width: 768px) {
            .specs-section .section-header h2 {
                font-size: 28px;
            }

            .specs-section .section-header p {
                font-size: 16px;
            }

            .specs-table td {
                padding: 16px 20px;
                font-size: 13px;
            }

            .specs-table td:first-child {
                width: 35%;
            }
        }

@media (max-width: 768px) {
            .highlights-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
                margin: 40px 0;
            }

            .highlight-card {
                padding: 24px 16px;
            }

            .highlight-icon {
                width: 52px;
                height: 52px;
                margin-bottom: 16px;
            }

            .highlight-icon svg {
                width: 26px;
                height: 26px;
            }

            .highlight-title {
                font-size: 14px;
                margin-bottom: 8px;
            }

            .highlight-desc {
                font-size: 12px;
                line-height: 1.5;
            }

            .multi-function-grid,
            .lighting-grid,
            .detail-header {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .multi-function-text,
            .detail-text {
                padding-right: 0;
            }

            .lighting-text {
                order: 2;
            }

            .lighting-images {
                order: 1;
            }
        }

@media (max-width: 768px) {
            .top-bar {
                display: none;
            }

            .nav-links {
                display: none;
            }

            .product-hero h1 {
                font-size: 36px;
            }

            .product-hero p {
                font-size: 18px;
            }

            .gallery-grid,
            .features-grid,
            .scale-grid,
            .material-grid,
            .detail-images,
            .multi-function-images {
                grid-template-columns: 1fr;
            }

            .gallery-item.large,
            .detail-img.large,
            .function-img.large {
                grid-column: span 1;
                grid-row: span 1;
            }

            .gallery-item.large img,
            .detail-img.large img {
                height: 280px;
            }

            .function-img.large img {
                height: 240px;
            }

            .section-header h2 {
                font-size: 28px;
            }

            .footer-content {
                grid-template-columns: 1fr;
                padding: 0 20px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 20px;
                padding: 30px 20px;
            }

            .consultation-buttons {
                flex-direction: column;
                width: 100%;
            }

            .consultation-btn {
                width: 100%;
                text-align: center;
            }
        }

@media (max-width: 768px) {
            .upgrade-section {
                padding: 80px 20px 100px;
            }

            .upgrade-intro h2 {
                font-size: 32px;
            }

            .upgrade-intro p {
                font-size: 16px;
            }

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

            .upgrade-card {
                padding: 28px 24px;
            }

            .upgrade-img {
                height: 180px;
            }
        }

@media (max-width: 768px) {
            .advantage-section {
                padding: 80px 20px 100px;
            }

            .section-header h2 {
                font-size: 32px;
            }

            .section-header p {
                font-size: 16px;
            }

            .advantage-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .advantage-card {
                padding: 24px 16px;
            }

            .advantage-icon {
                width: 52px;
                height: 52px;
                font-size: 26px;
                margin-bottom: 16px;
            }

            .advantage-title {
                font-size: 14px;
                margin-bottom: 8px;
            }

            .advantage-desc {
                font-size: 12px;
                line-height: 1.5;
            }
        }

@media (max-width: 768px) {
    .application-hero {
        padding: 60px 0 40px;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stat-number {
        font-size: 28px;
    }

    .scenarios-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 32px;
    }
}

@media (max-width: 768px) {
        .section-title {
font-size: 32px;
font-weight: bold;
color: var(--text-primary);
/* margin-bottom: 16px; */
width: 300px;
}
.contact-section {
padding: 40px 4px;
background: var(--white);
}
.environment-grid {
display: grid
;
grid-template-columns: repeat(1, 1fr);
gap: 10px;
margin-top: 30px;
}
.network-grid {
display: grid
;
grid-template-columns: repeat(2, 1fr);
gap: 14px;
margin-top: 60px;
}
.section-header p {
font-size: 16px;
color: var(--text-secondary);
}
.section-header h2 {
font-size: 26px;
font-weight: bold;
color: var(--text-primary);
margin-bottom: 6px;
}
.environment-item img {
width: 100%;
/* height: 280px; */
object-fit: cover;
transition: transform 0.6s ease;
}
.values-section {
padding: 40px 40px;
background: var(--gray-light);
}
.environment-section {
padding: 40px 40px;
background: var(--white);
}
.values-grid {
display: grid
;
grid-template-columns: repeat(2, 0.5fr);
gap: 10px;
justify-content: center;
}

    .about-section {
padding: 20px 40px;
background: var(--white);
}
        .vision-section {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
    padding: 60px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
        .vision-title {
    font-size: 26px;
    font-weight: bold;
    color: var(--white);
    margin-bottom: 24px;
    line-height: 1.3;
}

.vision-subtitle {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

    .section-title {
font-size: 32px;
font-weight: bold;
color: var(--text-primary);
margin-bottom: 16px;
}
.section-subtitle {
font-size: 16px;
color: var(--text-secondary);
}
    .cta-button {

display: none;
}
    .top-bar {
        display: none;
    }

    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .products-showcase {
        flex-direction: column;
        align-items: center;
    }

    .cases-grid {
        grid-template-columns: 1fr;
    }

    .service-grid {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: 16px;
        padding: 0 20px 10px;
        -webkit-overflow-scrolling: touch;
    }

    .service-grid::-webkit-scrollbar {
        display: none;
    }

    .service-grid .service-card,
    .service-grid .branch-card {
        flex: 0 0 280px;
        min-width: 260px;
    }

    .industries-grid {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: 16px;
        padding: 0 20px 10px;
        -webkit-overflow-scrolling: touch;
    }

    .industries-grid::-webkit-scrollbar {
        display: none;
    }

    .industries-grid .industry-module {
        flex: 0 0 280px;
        min-width: 260px;
    }

    .industry-module {
        min-height: 280px;
    }

    .industry-name {
        font-size: 20px;
    }

    .industry-desc {
        font-size: 13px;
        opacity: 1;
        transform: translateY(0);
    }

    .news-slide {
        flex: 0 0 100%;
    }

    .news-arrow {
        display: none;
    }

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

    .cta-buttons {
        flex-direction: column;
    }

    .cta-primary,
    .cta-secondary {
        width: 100%;
    }

    .banner-arrows {
        padding: 0 20px;
    }

    /* 新闻轮播：手机端 1 卡满宽 */
    .news-track {
        gap: 0;
    }

    .news-slider {
        flex: 0 0 100%;
    }

    .news-section {
        padding: 20px 16px;
    }

    /* 首页产品模块：手机端上下堆叠，图区满宽 */
    .product-module.left-layout,
    .product-module.right-layout {
        flex-direction: column;
        height: auto;
    }

    .product-module.left-layout .product-visual,
    .product-module.right-layout .product-visual {
        flex: none;
        width: 100%;
        height: 280px;
    }

    .product-module.left-layout .product-info,
    .product-module.right-layout .product-info {
        flex: none;
        width: 100%;
        padding: 24px 20px;
    }

    .product-visual-large img {
        width: 100%;
        max-width: 320px;
        height: auto;
        object-fit: contain;
    }

    /* 行业模块：移动端无 hover，描述始终可见 + 字体更小 */
    .industry-name {
        font-size: 16px;
    }

    .industry-desc {
        opacity: 1;
        transform: translateY(0);
        font-size: 12px;
    }
}

@media (max-width: 1024px) {
            .challenge-grid,
            .case-content {
                grid-template-columns: 1fr;
            }

            .hero-title {
                font-size: 42px;
            }
        }

@media (max-width: 1024px) {
    .contact-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

@media (max-width: 1024px) {
            .specs-section {
                padding: 80px 20px 100px;
            }

            .specs-section .section-header h2 {
                font-size: 36px;
            }

            .specs-table-container h3 {
                padding: 20px 24px;
                font-size: 18px;
            }

            .specs-table td {
                padding: 18px 24px;
                font-size: 14px;
            }

            .specs-table td:first-child {
                width: 30%;
            }
        }

@media (max-width: 1024px) {
    .scenarios-grid,
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .specs-grid,
    .case-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 1200px) {
            .overview-content {
                grid-template-columns: 1fr;
                gap: 50px;
            }

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

            .advantages-grid {
                grid-template-columns: 1fr;
            }

            .solution-card {
                grid-template-columns: 1fr;
            }

            .case-grid {
                grid-template-columns: 1fr;
            }

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

@media (min-width: 769px) and (max-width: 1200px) {
            .products-grid,
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

@media (max-width: 1200px) {
            .specs-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .specs-section .section-header h2 {
                font-size: 40px;
            }
        }

@media (max-width: 1200px) {
            .highlights-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 20px;
            }

            .highlight-card {
                padding: 24px 16px;
            }

            .highlight-icon {
                width: 56px;
                height: 56px;
            }

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

            .highlight-title {
                font-size: 15px;
            }

            .highlight-desc {
                font-size: 12px;
            }
        }

@media (max-width: 1200px) {
            .gallery-grid,
            .features-grid,
            .scale-grid,
            .material-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .multi-function-grid,
            .lighting-grid,
            .detail-header {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .multi-function-text,
            .detail-text {
                padding-right: 0;
            }

            .lighting-text {
                order: 2;
            }

            .lighting-images {
                order: 1;
            }

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

            .consultation-content {
                flex-direction: column;
                text-align: center;
            }

            .consultation-text {
                text-align: center;
            }
        }

@media (max-width: 1200px) {
            .upgrade-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 24px;
            }

            .upgrade-intro h2 {
                font-size: 40px;
            }

            .upgrade-card {
                padding: 32px 24px;
            }
        }

@media (max-width: 1200px) {
            .advantage-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 20px;
            }

            .advantage-card {
                padding: 28px 20px;
            }

            .advantage-icon {
                width: 56px;
                height: 56px;
                font-size: 28px;
            }

            .advantage-title {
                font-size: 15px;
            }

            .advantage-desc {
                font-size: 12px;
            }
        }

@media (max-width: 1200px) {
            .upgrade-grid,
            .advantage-grid,
            .mode-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .channel-grid,
            .analog-grid,
            .data-grid,
            .analysis-grid,
            .trigger-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .channel-text,
            .analog-text {
                padding-right: 0;
                order: 1;
            }

            .channel-images,
            .analog-images,
            .data-img {
                order: 2;
            }

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

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

            .consultation-content {
                flex-direction: column;
                text-align: center;
            }

            .consultation-text {
                text-align: center;
            }
        }

@media (min-width: 769px) and (max-width: 1200px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .news-slide {
        flex: 0 0 50%;
    }

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