:root {
            --primary-grad: linear-gradient(90deg, #ff5e62, #ff9966, #ffd97d, #6be585, #43cbff, #7f00ff);
            --rainbow-red: #ff5e62;
            --rainbow-orange: #ff9966;
            --rainbow-yellow: #feca57;
            --rainbow-green: #1dd1a1;
            --rainbow-blue: #48dbfb;
            --rainbow-purple: #9b5de5;
            --dark-text: #1e293b;
            --light-text: #64748b;
            --bg-light: #f8fafc;
            --card-shadow: 0 10px 30px -10px rgba(0,0,0,0.08);
            --card-hover-shadow: 0 20px 40px -15px rgba(0,0,0,0.15);
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--dark-text);
            background-color: #ffffff;
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 基础容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 80px 0;
            position: relative;
        }

        .section-bg-light {
            background-color: var(--bg-light);
        }

        /* 彩虹装饰线与标题 */
        .section-title-wrap {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--dark-text);
            position: relative;
            display: inline-block;
            margin-bottom: 15px;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 5%;
            width: 90%;
            height: 4px;
            background: var(--primary-grad);
            border-radius: 2px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--light-text);
            max-width: 700px;
            margin: 0 auto;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 30px;
            border: none;
            cursor: pointer;
            text-decoration: none;
            transition: var(--transition-smooth);
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        }

        .btn-rainbow {
            background: var(--primary-grad);
            color: #ffffff;
            background-size: 200% auto;
        }

        .btn-rainbow:hover {
            background-position: right center;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }

        .btn-outline {
            background: #ffffff;
            color: var(--dark-text);
            border: 2px solid var(--dark-text);
        }

        .btn-outline:hover {
            background: var(--dark-text);
            color: #ffffff;
            transform: translateY(-2px);
        }

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            z-index: 1000;
            transition: var(--transition-smooth);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .ai-page-logo {
            max-height: 40px;
            width: auto;
        }

        .logo-text {
            font-size: 1.3rem;
            font-weight: 800;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 20px;
        }

        .nav-link {
            text-decoration: none;
            color: var(--dark-text);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition-smooth);
            position: relative;
        }

        .nav-link:hover {
            color: var(--rainbow-red);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary-grad);
            transition: var(--transition-smooth);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark-text);
        }

        /* 1. Hero 首屏 - 纯文字，无图片 */
        .hero-section {
            padding: 150px 0 100px 0;
            background: radial-gradient(circle at 10% 20%, rgba(255, 94, 98, 0.05) 0%, rgba(67, 203, 255, 0.05) 90%);
            text-align: center;
            overflow: hidden;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(255, 94, 98, 0.1);
            color: var(--rainbow-red);
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(255, 94, 98, 0.2);
            animation: pulse 2s infinite;
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.25;
            color: var(--dark-text);
            margin-bottom: 25px;
            letter-spacing: -1px;
        }

        .hero-title span {
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-size: 200% auto;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--light-text);
            max-width: 800px;
            margin: 0 auto 40px auto;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        .hero-btn-primary {
            background: var(--primary-grad);
            color: #fff;
            padding: 15px 35px;
            border-radius: 50px;
            font-weight: bold;
            text-decoration: none;
            box-shadow: 0 10px 20px rgba(255, 94, 98, 0.3);
            transition: var(--transition-smooth);
        }

        .hero-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 94, 98, 0.4);
        }

        /* 2. 关于我们 */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--dark-text);
        }

        .about-text p {
            color: var(--light-text);
            margin-bottom: 20px;
            font-size: 1.05rem;
        }

        .about-highlight-box {
            border-left: 4px solid var(--rainbow-orange);
            padding-left: 20px;
            margin: 25px 0;
            background: rgba(255, 153, 102, 0.05);
            padding-top: 15px;
            padding-bottom: 15px;
            border-radius: 0 8px 8px 0;
        }

        .about-media {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .about-media img {
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            transition: var(--transition-smooth);
        }

        .about-media img:hover {
            transform: scale(1.02);
            box-shadow: var(--card-hover-shadow);
        }

        /* 3. 全平台AIGC服务体系 & 软件介绍 */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 35px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 6px;
            height: 100%;
            background: var(--primary-grad);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--card-hover-shadow);
        }

        .service-icon-box {
            width: 60px;
            height: 60px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin-bottom: 25px;
        }

        .bg-gradient-1 { background: rgba(255, 94, 98, 0.1); color: var(--rainbow-red); }
        .bg-gradient-2 { background: rgba(255, 153, 102, 0.1); color: var(--rainbow-orange); }
        .bg-gradient-3 { background: rgba(72, 219, 251, 0.1); color: var(--rainbow-blue); }

        .service-card h4 {
            font-size: 1.4rem;
            margin-bottom: 15px;
        }

        .service-card p {
            color: var(--light-text);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .tag-item {
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: 20px;
            background: var(--bg-light);
            color: var(--light-text);
            border: 1px solid rgba(0,0,0,0.05);
        }

        /* 4. 全自动AIGC制作流程 */
        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            width: 4px;
            height: 100%;
            background: var(--primary-grad);
            transform: translateX(-50%);
        }

        .timeline-item {
            margin-bottom: 60px;
            position: relative;
            width: 50%;
            padding: 0 40px;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }

        .timeline-dot {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: #fff;
            border: 4px solid var(--rainbow-blue);
            position: absolute;
            top: 5px;
            z-index: 10;
        }

        .timeline-item:nth-child(odd) .timeline-dot {
            right: -12px;
        }

        .timeline-item:nth-child(even) .timeline-dot {
            left: -12px;
        }

        .timeline-content {
            background: #ffffff;
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.05);
            display: inline-block;
            text-align: left;
            width: 100%;
        }

        .timeline-content h4 {
            font-size: 1.25rem;
            margin-bottom: 10px;
            color: var(--dark-text);
        }

        /* 5. 全行业解决方案 */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .solution-card {
            background: #ffffff;
            border-radius: 12px;
            padding: 30px;
            border-top: 4px solid var(--rainbow-yellow);
            box-shadow: var(--card-shadow);
            transition: var(--transition-smooth);
        }

        .solution-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--card-hover-shadow);
        }

        .solution-card:nth-child(2) { border-top-color: var(--rainbow-green); }
        .solution-card:nth-child(3) { border-top-color: var(--rainbow-blue); }
        .solution-card:nth-child(4) { border-top-color: var(--rainbow-purple); }

        /* 6. 全国服务网络 */
        .network-section {
            background: radial-gradient(circle at 80% 80%, rgba(155, 93, 229, 0.05) 0%, rgba(255,255,255,0) 80%);
        }

        .network-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .network-map-placeholder {
            border: 1px solid rgba(0,0,0,0.05);
            border-radius: 16px;
            padding: 40px;
            background: #fff;
            position: relative;
            overflow: hidden;
            box-shadow: var(--card-shadow);
        }

        .network-node {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 12px;
            background: var(--bg-light);
            border-radius: 20px;
            font-size: 0.85rem;
            margin: 5px;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .network-node::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--rainbow-green);
        }

        /* 7. 标准化服务全流程 & 8. 技术标准 */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
            margin-bottom: 50px;
        }

        .step-box {
            background: #ffffff;
            border-radius: 12px;
            padding: 25px;
            text-align: center;
            border: 1px solid rgba(0,0,0,0.03);
            box-shadow: var(--card-shadow);
            position: relative;
        }

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-grad);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 15px auto;
        }

        .tech-standards-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-top: 40px;
        }

        .tech-card {
            background: rgba(255,255,255,0.7);
            border-radius: 12px;
            padding: 30px;
            border: 1px dashed rgba(0,0,0,0.1);
        }

        /* 9. 客户案例中心 */
        .case-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .case-card {
            background: #ffffff;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.03);
        }

        .case-img-wrap {
            position: relative;
            overflow: hidden;
        }

        .case-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
            transition: var(--transition-smooth);
        }

        .case-card:hover .case-img-wrap img {
            transform: scale(1.05);
        }

        .case-info {
            padding: 30px;
        }

        .case-tag {
            display: inline-block;
            padding: 4px 10px;
            background: rgba(72, 219, 251, 0.1);
            color: var(--rainbow-blue);
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 4px;
            margin-bottom: 15px;
        }

        /* 10. 对比评测 */
        .eval-section {
            background: linear-gradient(135deg, rgba(255, 94, 98, 0.02) 0%, rgba(127, 0, 255, 0.02) 100%);
        }

        .eval-header {
            display: flex;
            align-items: center;
            justify-content: space-around;
            background: #ffffff;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--card-shadow);
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 20px;
        }

        .eval-score-box {
            text-align: center;
        }

        .eval-score {
            font-size: 4rem;
            font-weight: 900;
            background: var(--primary-grad);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
        }

        .eval-stars {
            color: #feca57;
            font-size: 1.5rem;
            margin-top: 5px;
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: #ffffff;
            border-radius: 16px;
            box-shadow: var(--card-shadow);
        }

        .eval-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .eval-table th, .eval-table td {
            padding: 18px 25px;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .eval-table th {
            background-color: var(--bg-light);
            font-weight: 700;
            color: var(--dark-text);
        }

        .eval-table tr:last-child td {
            border-bottom: none;
        }

        .tag-yes {
            color: var(--rainbow-green);
            font-weight: bold;
        }

        .tag-no {
            color: var(--rainbow-red);
        }

        /* 11. 智能需求匹配与 20. 联系我们表单 */
        .form-section {
            background-color: var(--bg-light);
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .contact-form-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.03);
        }

        .form-group-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-bottom: 20px;
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border-radius: 8px;
            border: 1px solid rgba(0,0,0,0.1);
            background: var(--bg-light);
            font-size: 0.95rem;
            color: var(--dark-text);
            transition: var(--transition-smooth);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--rainbow-orange);
            background: #ffffff;
            box-shadow: 0 0 0 4px rgba(255, 153, 102, 0.15);
        }

        /* 12. Token比价参考 */
        .token-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            text-align: center;
        }

        .token-price {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--rainbow-purple);
            margin: 15px 0;
        }

        /* 13. 职业技术培训 & 14. 人工智能培训 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .training-card {
            background: #ffffff;
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            text-align: center;
            transition: var(--transition-smooth);
        }

        .training-card:hover {
            transform: translateY(-5px);
            border-color: var(--rainbow-green);
        }

        .training-card h4 {
            margin-top: 15px;
            font-size: 1.1rem;
        }

        /* 15. 帮助中心, 16. 常见用户问题 FAQ, 17. 常见问题自助排查, 18. 网站术语百科 */
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 15px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: #ffffff;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .faq-question {
            padding: 20px 25px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            user-select: none;
        }

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--rainbow-orange);
            transition: var(--transition-smooth);
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: var(--bg-light);
        }

        .faq-answer-inner {
            padding: 20px 25px;
            color: var(--light-text);
            font-size: 0.95rem;
            border-top: 1px solid rgba(0,0,0,0.03);
        }

        /* 术语百科 & 自助排查 */
        .百科-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 40px;
        }

        .wiki-card {
            background: var(--bg-light);
            border-radius: 8px;
            padding: 20px;
            border-left: 3px solid var(--rainbow-blue);
        }

        /* 19. 行业资讯 / 知识库 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .article-card {
            background: #ffffff;
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .article-card:hover {
            transform: translateY(-5px);
        }

        .article-body {
            padding: 25px;
        }

        .article-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .article-title a {
            text-decoration: none;
            color: var(--dark-text);
            transition: var(--transition-smooth);
        }

        .article-title a:hover {
            color: var(--rainbow-red);
        }

        /* 6条用户评论 */
        .reviews-section {
            background: linear-gradient(180deg, #ffffff 0%, var(--bg-light) 100%);
        }

        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .review-card {
            background: #ffffff;
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--card-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            position: relative;
        }

        .review-text {
            font-style: italic;
            color: var(--light-text);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .review-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: var(--primary-grad);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-weight: bold;
            font-size: 1.1rem;
        }

        .review-info h5 {
            font-size: 0.95rem;
            font-weight: 700;
        }

        .review-info p {
            font-size: 0.8rem;
            color: var(--light-text);
        }

        /* 侧边悬浮客服 */
        .floating-kf {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .kf-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #ffffff;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
            transition: var(--transition-smooth);
        }

        .kf-btn:hover {
            transform: scale(1.1);
        }

        .kf-btn-qr {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #ffffff;
            padding: 15px;
            border-radius: 12px;
            box-shadow: 0 4px 25px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 160px;
        }

        .kf-btn-qr img {
            width: 100%;
            height: auto;
            border-radius: 8px;
        }

        .kf-btn:hover .kf-btn-qr {
            display: block;
        }

        /* 页脚 */
        footer {
            background: #1e293b;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            font-size: 0.9rem;
        }

        footer a {
            color: #cbd5e1;
            text-decoration: none;
            transition: var(--transition-smooth);
        }

        footer a:hover {
            color: #ffffff;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 1.1rem;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-col ul {
            list-style: none;
        }

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

        .friend-links {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 25px;
            margin-top: 25px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }

        .friend-links span {
            color: #64748b;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 30px;
            text-align: center;
            font-size: 0.8rem;
        }

        /* 动画效果定义 */
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.05); }
            100% { transform: scale(1); }
        }

        /* 响应式样式适配 */
        @media (max-width: 992px) {
            .hero-title { font-size: 2.3rem; }
            .about-grid, .network-grid, .form-grid, .tech-standards-grid, .case-grid {
                grid-template-columns: 1fr;
            }
            .timeline::before { left: 20px; }
            .timeline-item { width: 100%; padding: 0 0 0 50px; text-align: left !important; }
            .timeline-dot { left: 8px !important; }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #ffffff;
                padding: 20px;
                box-shadow: 0 10px 20px rgba(0,0,0,0.1);
            }
            .nav-menu.active {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .nav-actions {
                display: none;
            }
        }