/* 响应式设计 */

/* 大屏幕 (1200px 以上) */
@media (min-width: 1200px) {
    .container {
        max-width: 1400px;
    }
    
    .hero-title {
        font-size: 56px;
    }
    
    .hero-subtitle {
        font-size: 28px;
    }
    
    .business-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .business-grid-enhanced {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* 中等屏幕 (768px - 1199px) */
@media (max-width: 1199px) {
    .container {
        padding: 0 15px;
    }
    
    .top-bar-content {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .contact-info {
        gap: 20px;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .hero-subtitle {
        font-size: 22px;
    }
    
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .business-grid-enhanced {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
    
    .business-card-enhanced {
        margin-bottom: 20px;
    }
    
    .business-header {
        padding: 25px 25px 15px;
    }
    
    .business-content {
        padding: 20px 25px;
    }
    
    .business-footer {
        padding: 15px 25px 25px;
    }
    
    .info-grid {
        flex-direction: row;
        gap: 30px;
    }
    
    .info-card {
        max-width: none;
    }
}

/* 平板设备 (768px - 991px) */
@media (max-width: 991px) {
    .nav-menu {
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        display: none;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    /* 产品页面响应式 */
    .intro-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .intro-text {
        padding-right: 0;
        order: 2;
    }
    
    .product-image-main {
        order: 1;
    }
    
    .system-diagram {
        padding: 20px;
    }
    
    .diagram-container svg {
        width: 100%;
        height: auto;
    }
    
    /* TEA页面响应式样式 */
    .framework-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding: 0 10px;
    }
    
    /* 服务特色网格响应式 */
    .features-grid-modern {
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }
    
    .indicators-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    
    .areas-content {
        grid-template-columns: 1fr;
        gap: 20px;
        padding: 0 10px;
    }
    
    .deliverables-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
    }

    /* 评估指标板块平板响应式 */
    .categories-grid-modern {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        max-width: 800px;
    }

    .category-card {
        height: 180px;
        padding: 25px 20px;
    }

    .icon-bg {
        width: 65px;
        height: 65px;
        font-size: 1.9rem;
    }

    .category-content h3 {
        font-size: 1.25rem;
    }

    .category-content p {
        font-size: 0.92rem;
    }
    
    /* 四列布局平板响应式 */
    .specs-grid-four-columns {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
        padding: 0 15px;
    }
    
    /* 技术特点图片展示平板响应式 */
    .feature-images {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
        margin-top: 25px;
        padding: 18px 0;
    }
    
    .feature-image-container {
        padding: 18px;
    }
    
    .process-timeline::before {
        left: 20px;
    }
    
    .timeline-marker {
        left: 20px;
        transform: none;
    }
    
    .timeline-item {
        flex-direction: row !important;
    }
    
    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px !important;
        margin-right: 0 !important;
    }
    
    .nav-item {
        width: 100%;
    }
    
    .nav-item > a {
        padding: 15px 20px;
        border-bottom: 1px solid #f8f9fa;
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: #f8f9fa;
        margin-left: 20px;
    }
    
    .hero-section {
        padding: 60px 0;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 20px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
        gap: 15px;
    }
    
    .business-section,
    .info-section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 32px;
        margin-bottom: 40px;
    }
    
    .business-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .info-grid {
        flex-direction: column;
        gap: 25px;
        max-width: 500px;
    }
    
    .info-card {
        max-width: none;
    }
}

/* 小屏幕设备 (576px - 767px) */
@media (max-width: 767px) {
    .top-bar {
        padding: 6px 0;
    }
    
    .top-bar-content {
        flex-direction: column;
        text-align: center;
        gap: 15px;
    }
    
    .logo h1 {
        font-size: 24px;
    }
    
    .contact-info {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .contact-item {
        font-size: 12px;
    }
    
    .hero-section {
        padding: 40px 0;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-description {
        font-size: 14px;
        margin-bottom: 30px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 13px;
    }
    
    .business-section,
    .info-section {
        padding: 40px 0;
    }
    
    .section-title {
        font-size: 28px;
        margin-bottom: 30px;
    }
    
    .business-card {
        padding: 30px 20px;
    }
    
    .business-icon {
        width: 60px;
        height: 60px;
        margin-bottom: 20px;
    }
    
    .business-title {
        font-size: 20px;
    }
    
    .business-description {
        font-size: 14px;
    }
    
    .business-grid-enhanced {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 40px;
    }
    
    .business-card-enhanced {
        margin-bottom: 15px;
    }
    
    /* 产品页面小屏幕适配 */
    .product-header h1 {
        font-size: 24px;
    }
    
    .product-subtitle {
        font-size: 16px;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .intro-text {
        padding-right: 0;
    }
    
    .intro-content h2 {
        font-size: 20px;
    }
    
    .intro-content h3 {
        font-size: 18px;
    }
    
    .system-diagram {
        padding: 15px;
        margin-top: 15px;
    }
    
    .system-diagram h3 {
        font-size: 18px;
        margin-bottom: 20px;
    }
    
    .diagram-container {
        padding: 15px;
    }
    
    .product-photo {
        max-width: 100%;
    }
    
    .image-caption {
        font-size: 12px;
        margin-top: 10px;
    }
    
    .business-header {
        padding: 20px 20px 15px;
    }
    
    .business-header .business-icon {
    
    /* TEA页面小屏幕适配 */
    .analysis-framework,
    .application-areas {
        padding: 30px 0;
        margin-bottom: 40px;
    }
    
    .analysis-framework h2,
    .key-indicators h2,
    .application-areas h2,
    .deliverables h2 {
        font-size: 1.8rem;
        margin-bottom: 25px;
    }
    
    .framework-grid {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 0 5px;
    }
    
    /* 服务特色网格小屏幕适配 */
    .features-grid-modern {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .features-grid-four-columns {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .framework-item {
        padding: 20px;
    }
    
    .indicators-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    
    .indicator-card {
        padding: 15px;
    }
    
    .areas-content {
        grid-template-columns: 1fr;
        gap: 15px;
        padding: 0 5px;
    }
    
    .area-section {
        padding: 20px;
    }
    
    .deliverables-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .deliverable-item {
        padding: 20px;
    }
    
    .service-contact {
        padding: 30px 20px;
        margin-bottom: 40px;
    }
    
    .service-contact h2 {
        font-size: 1.6rem;
    }
    
    .contact-buttons {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }
    
    .contact-buttons .btn {
        width: 100%;
        max-width: 250px;
    }
    
    .process-timeline {
        padding: 10px 0;
    }
    
    .timeline-content {
        padding: 20px;
        width: calc(100% - 50px);
        margin-left: 50px !important;
    }
    
    .timeline-marker {
        width: 30px;
        height: 30px;
        font-size: 0.9rem;
    }
        width: 60px;
        height: 60px;
        margin-bottom: 15px;
    }
    
    .business-header .business-title {
        font-size: 18px;
    }
    
    .business-content {
        padding: 15px 20px;
    }
    
    .business-content .business-description {
        font-size: 14px;
        margin-bottom: 20px;
    }
    
    .category-item {
        padding: 15px;
        margin-bottom: 15px;
    }
    
    .category-item h4 {
        font-size: 15px;
    }
    
    .category-item p {
        font-size: 13px;
    }
    
    .business-footer {
        padding: 15px 20px 20px;
    }
    
    .business-link-enhanced {
        font-size: 14px;
        padding: 10px 20px;
    }
    
    /* 业务板块中等屏幕响应式样式 */
    .business-section-block {
        margin-bottom: 35px;
    }
    
    .block-header {
        padding: 35px 25px;
    }
    
    .block-title {
        font-size: 26px;
    }
    
    .block-description {
        font-size: 15px;
    }
    
    .products-slider {
        padding: 25px;
    }
    
    .slider-btn {
        width: 35px;
        height: 35px;
        font-size: 14px;
    }
    
    .slider-controls.prev {
        left: 5px;
    }
    
    .slider-controls.next {
        right: 5px;
    }
    
    .product-item {
        flex: 0 0 calc(50% - 12.5px);
        min-width: calc(50% - 12.5px);
        padding: 20px 15px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
    }
    
    .product-image {
        width: 100%;
        aspect-ratio: 4/3;
        margin: 0 0 15px 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .product-icon {
        font-size: 44px;
    }
    
    .product-item h4 {
        font-size: 17px;
    }
    
    .product-item p {
        font-size: 13px;
    }
    
    .block-footer {
        padding: 22px 25px;
    }
    
    .view-all-btn {
        font-size: 15px;
        padding: 13px 26px;
    }
    
    /* 业务板块响应式样式 */
    .business-section-block {
        margin-bottom: 30px;
    }
    
    .block-header {
        padding: 30px 20px;
    }
    
    .block-title {
        font-size: 24px;
    }
    
    .block-description {
        font-size: 14px;
    }
    
    .products-slider {
        padding: 20px;
    }
    
    .slider-btn {
        width: 30px;
        height: 30px;
        font-size: 12px;
    }
    
    .slider-controls.prev {
        left: 2px;
    }
    
    .slider-controls.next {
        right: 2px;
    }
    
    .product-item {
        flex: 0 0 calc(100% - 25px);
        min-width: calc(100% - 25px);
        padding: 18px 12px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
    }
    
    .product-icon {
        font-size: 40px;
    }
    
    .product-item h4 {
        font-size: 16px;
    }
    
    .product-item p {
        font-size: 13px;
    }
    
    .block-footer {
        padding: 20px;
    }
    
    .view-all-btn {
        font-size: 14px;
        padding: 12px 24px;
    }
    
    .info-card {
        padding: 20px;
    }
    
    .info-card h3 {
        font-size: 18px;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
    }
    
    .modal-header,
    .modal-body {
        padding: 20px;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
    }
}

/* 超小屏幕设备 (575px 以下) */
@media (max-width: 575px) {
    .container {
        padding: 0 10px;
    }
    
    .top-bar-content {
        gap: 10px;
    }
    
    .logo h1 {
        font-size: 20px;
    }
    
    .logo .tagline {
        font-size: 10px;
    }
    
    .contact-info {
        gap: 10px;
    }
    
    .contact-item {
        font-size: 11px;
    }
    
    .contact-icon {
        width: 16px;
        height: 16px;
    }
    
    .language-switch .lang-btn {
        padding: 6px 12px;
        font-size: 11px;
    }
    
    .nav-item > a {
        padding: 12px 15px;
        font-size: 14px;
    }
    
    .hero-section {
        padding: 30px 0;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-description {
        font-size: 13px;
        margin-bottom: 25px;
    }
    
    .btn {
        padding: 8px 16px;
        font-size: 12px;
    }
    
    .business-section,
    .info-section {
        padding: 30px 0;
    }
    
    .section-title {
        font-size: 24px;
        margin-bottom: 25px;
    }
    
    .business-card {
        padding: 25px 15px;
    }
    
    .business-icon {
        width: 50px;
        height: 50px;
        margin-bottom: 15px;
    }
    
    .business-title {
        font-size: 18px;
        margin-bottom: 10px;
    }
    
    .business-description {
        font-size: 13px;
        margin-bottom: 20px;
    }
    
    .info-card {
        padding: 25px 20px;
    }
    
    .info-card h3 {
        font-size: 18px;
        margin-bottom: 20px;
    }
    
    .info-card p {
        font-size: 14px;
        margin-bottom: 20px;
    }
    
    .info-card .btn {
        padding: 12px 24px;
        font-size: 14px;
        min-width: 120px;
    }
    
    .contact-details p {
        font-size: 12px;
        margin-bottom: 8px;
    }
    
    .business-links a {
        font-size: 13px;
    }
    
    .footer {
        padding: 30px 0;
    }
    
    .company-motto {
        font-size: 14px;
        margin-bottom: 15px;
    }
    
    .copyright {
        font-size: 12px;
    }
    
    .modal-content {
        margin: 5% auto;
        width: 98%;
    }
    
    .modal-header {
        padding: 15px;
    }
    
    .modal-header h3 {
        font-size: 18px;
    }
    
    .modal-body {
        padding: 15px;
    }
    
    .form-group {
        margin-bottom: 15px;
    }
    
    .form-group label {
        font-size: 13px;
        margin-bottom: 6px;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 10px;
        font-size: 13px;
    }
}

/* 横屏模式优化 */
@media (max-height: 500px) and (orientation: landscape) {
    .hero-section {
        padding: 30px 0;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-description {
        margin-bottom: 20px;
    }
    
    .modal-content {
        margin: 2% auto;
        max-height: 90vh;
        overflow-y: auto;
    }
}

/* 左侧边栏响应式样式 */
@media (max-width: 768px) {
    .content-wrapper {
        flex-direction: column;
        gap: 20px;
    }
    
    .left-sidebar {
        width: 100%;
        order: 0;
        padding-top: 25px;
    }
    
    .main-content-area {
        order: 1;
    }
    
    .product-cards {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
    }
    
    .product-card .product-image {
        height: 100px;
    }
    
    .product-card .product-info h4 {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .left-sidebar {
        margin-bottom: 20px;
        padding-top: 15px;
    }
    
    .product-cards {
        grid-template-columns: 1fr;
    }
    
    .product-card {
        padding: 12px;
    }
    
    .product-card .product-image {
        height: 80px;
    }
}

/* 打印样式 */
@media print {
    .top-bar,
    .main-nav,
    .hero-actions,
    .business-link,
    .btn,
    .modal {
        display: none !important;
    }
    
    .hero-section {
        background: none !important;
        color: #333 !important;
        padding: 20px 0;
    }
    
    .business-card,
    .info-card {
        box-shadow: none !important;
        border: 1px solid #ddd;
        break-inside: avoid;
    }
    
    .footer {
        background: none !important;
        color: #333 !important;
    }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .btn-primary {
        background: #000;
        border: 2px solid #000;
    }
    
    .btn-secondary {
        background: #fff;
        color: #000;
        border: 2px solid #000;
    }
    
    .business-card {
        border: 2px solid #333;
    }
    
    .info-card {
        border: 2px solid #333;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }
    
    .tea-definition {
        color: #e0e0e0 !important;
    }
    
    .intro-text p:not(.tea-definition) {
        color: #e0e0e0 !important;
    }
    
    .top-bar {
        background: linear-gradient(135deg, #2d2d2d, #1a1a1a);
        border-bottom-color: #444;
    }
    
    .main-nav {
        background: #2d2d2d;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }
    
    .nav-item > a {
        color: #e0e0e0;
    }
    
    .nav-item:hover > a,
    .nav-item.active > a {
        background: rgba(0, 123, 255, 0.2);
    }
    
    .dropdown-menu {
        background: #2d2d2d;
        border: 1px solid #444;
    }
    
    .business-section {
        background: #1a1a1a;
    }
    
    .business-card {
        background: #2d2d2d;
        border: 1px solid #444;
    }
    
    .info-section {
        background: #2d2d2d;
    }
    
    .info-card {
        background: #1a1a1a;
        border-color: #444;
    }
    
    .modal-content {
        background: #2d2d2d;
        color: #e0e0e0;
    }
    
    .form-group input,
    .form-group textarea {
        background: #1a1a1a;
        border-color: #444;
        color: #e0e0e0;
    }
    
    .form-group input:focus,
    .form-group textarea:focus {
        border-color: #007bff;
    }

    /* 联系页面响应式样式 */
    .contact-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .form-container {
        padding: 30px 20px;
    }

    .contact-card {
        padding: 25px 20px;
    }

    .business-hours,
    .quick-links {
        padding: 25px 20px;
    }

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

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

    /* 评估指标板块响应式 */
    .categories-grid-modern {
        grid-template-columns: 1fr;
        gap: 20px;
        margin: 30px 0;
        max-width: 100%;
    }

    .category-card {
        height: auto;
        min-height: 180px;
        padding: 25px 20px;
    }

    .icon-bg {
        width: 60px;
        height: 60px;
        font-size: 1.8rem;
        margin-bottom: 15px;
    }

    .category-content h3 {
        font-size: 1.2rem;
        margin: 10px 0 8px 0;
    }

    .category-content p {
        font-size: 0.9rem;
        margin-bottom: 12px;
    }

    .category-unit {
        font-size: 0.85rem;
        padding: 6px 12px;
    }
    
    /* 技术经济性分析指标响应式 */
    .indicators-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .indicator-card {
        padding: 12px;
        height: 140px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
    
    .indicator-card h3 {
        font-size: 1.1rem;
        margin-bottom: 6px;
    }
    
    .indicator-card p {
        font-size: 0.9rem;
        margin-bottom: 0;
        flex-grow: 1;
    }
    
    .indicator-formula {
        font-size: 0.8rem;
        padding: 8px 10px;
        height: 40px;
        display: flex;
        align-items: center;
        margin-top: 0;
        justify-content: center;
        flex-shrink: 0;
    }
    
    /* 四列布局响应式 */
    .specs-grid-four-columns {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        padding: 0 10px;
    }
    
    /* 技术特点图片展示响应式 */
    .feature-images {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 20px;
        padding: 15px 0;
    }
    
    .feature-image-container {
        padding: 15px;
    }
    
    .feature-image {
        max-width: 100%;
    }
    
    .feature-image.sem-image {
        max-width: 1000px;
    }
}