:root {
            --primary-pink: #FF6B8B;
            --primary-blue: #4D96FF;
            --primary-yellow: #FFD93D;
            --primary-green: #6BCB77;
            --text-main: #2D3748;
            --text-muted: #718096;
            --bg-light: #FDFAF6;
            --bg-pure: #FFFFFF;
            --border-color: #EDF2F7;
            --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-smooth);
        }

        /* 统一外层居中容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 按钮通用样式 - 缤纷糖果风 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: var(--transition-smooth);
            font-size: 1rem;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
        }

        .btn-pink {
            background: linear-gradient(135deg, var(--primary-pink), #FF8E9E);
            color: #fff;
        }
        .btn-pink:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(255, 107, 139, 0.3);
        }

        .btn-blue {
            background: linear-gradient(135deg, var(--primary-blue), #6CA6FF);
            color: #fff;
        }
        .btn-blue:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(77, 150, 255, 0.3);
        }

        .btn-outline {
            background: transparent;
            border: 2px solid var(--primary-blue);
            color: var(--primary-blue);
        }
        .btn-outline:hover {
            background-color: var(--primary-blue);
            color: #fff;
            transform: translateY(-2px);
        }

        /* 标签与徽章 */
        .badge {
            display: inline-block;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .badge-pink { background-color: rgba(255, 107, 139, 0.15); color: var(--primary-pink); }
        .badge-blue { background-color: rgba(77, 150, 255, 0.15); color: var(--primary-blue); }
        .badge-green { background-color: rgba(107, 203, 119, 0.15); color: #4B9A57; }

        /* 顶部导航 */
        header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

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

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

        .ai-page-logo {
            height: 38px;
            width: auto;
        }

        nav {
            display: flex;
            gap: 20px;
        }

        nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
            padding: 6px 12px;
            border-radius: 8px;
        }

        nav a:hover {
            color: var(--primary-pink);
            background-color: rgba(255, 107, 139, 0.05);
        }

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

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .menu-toggle span {
            display: block;
            width: 24px;
            height: 3px;
            background-color: var(--text-main);
            border-radius: 2px;
            transition: var(--transition-smooth);
        }

        /* 主体布局 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

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

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary-pink), var(--primary-blue));
        }

        .section-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 首屏 Hero - 缤纷糖果无图风 */
        .hero {
            background: radial-gradient(circle at 10% 20%, rgba(255, 107, 139, 0.08) 0%, rgba(77, 150, 255, 0.08) 90%);
            padding: 120px 0 90px 0;
            text-align: center;
            border-bottom: none;
        }

        .hero-content {
            max-width: 850px;
            margin: 0 auto;
        }

        .hero h1 {
            font-size: 3.2rem;
            font-weight: 850;
            line-height: 1.25;
            letter-spacing: -1px;
            margin-bottom: 24px;
            color: var(--text-main);
        }

        .hero h1 span {
            background: linear-gradient(120deg, var(--primary-pink), var(--primary-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero .lead {
            font-size: 1.3rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            line-height: 1.6;
        }

        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
        }

        .hero-tags {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 10px;
            max-width: 700px;
            margin: 0 auto;
        }

        .hero-tags span {
            background: var(--bg-pure);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.9rem;
            color: var(--text-main);
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            transition: var(--transition-smooth);
        }
        .hero-tags span:hover {
            border-color: var(--primary-pink);
            transform: scale(1.05);
        }

        /* 平台/关于介绍 */
        .intro-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .intro-text h3 {
            font-size: 1.8rem;
            margin-bottom: 15px;
            color: var(--text-main);
        }

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

        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
            margin-top: 30px;
        }

        .intro-feat-item {
            background-color: var(--bg-pure);
            padding: 15px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
        }

        .intro-feat-item h4 {
            color: var(--primary-blue);
            margin-bottom: 5px;
            font-size: 1.05rem;
        }

        .intro-image-wrapper {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 15px 35px rgba(0,0,0,0.05);
        }

        /* 服务能力卡片 */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        .card {
            background-color: var(--bg-pure);
            border-radius: 20px;
            padding: 30px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 25px rgba(0,0,0,0.02);
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 6px;
            height: 100%;
            background-color: var(--primary-pink);
            opacity: 0;
            transition: var(--transition-smooth);
        }

        .card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.06);
        }

        .card:hover::before {
            opacity: 1;
        }

        .card-icon {
            width: 50px;
            height: 50px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            margin-bottom: 20px;
        }

        .bg-pink-light { background-color: rgba(255, 107, 139, 0.1); color: var(--primary-pink); }
        .bg-blue-light { background-color: rgba(77, 150, 255, 0.1); color: var(--primary-blue); }
        .bg-yellow-light { background-color: rgba(255, 217, 61, 0.15); color: #D4A017; }
        .bg-green-light { background-color: rgba(107, 203, 119, 0.1); color: var(--primary-green); }

        .card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }

        .card p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        /* 流程步骤 */
        .step-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
            margin-top: 40px;
        }

        .step-item {
            text-align: center;
            background: var(--bg-pure);
            padding: 30px 20px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            position: relative;
            box-shadow: 0 8px 20px rgba(0,0,0,0.02);
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary-pink), var(--primary-blue));
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px auto;
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
        }

        .step-item h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 对比评测表格 */
        .table-responsive {
            overflow-x: auto;
            background: var(--bg-pure);
            border-radius: 20px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 30px rgba(0,0,0,0.02);
            padding: 10px;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 700px;
        }

        th, td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }

        th {
            font-weight: 700;
            color: var(--text-main);
            background-color: rgba(0,0,0,0.01);
        }

        .highlight-col {
            background-color: rgba(255, 107, 139, 0.03);
            font-weight: 600;
        }

        /* 评测总结卡片 */
        .review-summary-card {
            background: linear-gradient(135deg, #FFF0F2 0%, #E6EFFF 100%);
            border-radius: 20px;
            padding: 35px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 40px;
            border: 1px solid rgba(255, 107, 139, 0.1);
        }

        .summary-left h3 {
            font-size: 1.6rem;
            margin-bottom: 10px;
        }

        .summary-stars {
            color: var(--primary-yellow);
            font-size: 1.5rem;
            margin-bottom: 10px;
        }

        .summary-score {
            text-align: center;
            background: var(--bg-pure);
            padding: 15px 25px;
            border-radius: 15px;
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
        }

        .score-val {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--primary-pink);
            line-height: 1;
        }

        .score-max {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 用户评论 */
        .comment-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
        }

        .comment-card {
            background-color: var(--bg-pure);
            border-radius: 16px;
            padding: 24px;
            border: 1px solid var(--border-color);
            box-shadow: 0 6px 15px rgba(0,0,0,0.01);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

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

        .comment-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .user-avatar-placeholder {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-blue), var(--primary-pink));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .user-info h4 {
            font-size: 0.95rem;
            margin-bottom: 2px;
        }

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

        /* 案例中心 */
        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .gallery-card {
            background: var(--bg-pure);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition-smooth);
        }
        .gallery-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.06);
        }

        .gallery-img-holder {
            width: 100%;
            position: relative;
            background-color: #eee;
            overflow: hidden;
        }

        .gallery-img-holder img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }

        .gallery-desc {
            padding: 20px;
        }

        .gallery-desc h4 {
            margin-bottom: 8px;
            font-size: 1.1rem;
        }

        .gallery-desc p {
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        /* 极简网格排版（素材图展示） */
        .material-showcase {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }
        .material-showcase img {
            width: 100%;
            border-radius: 16px;
            object-fit: cover;
            box-shadow: 0 8px 24px rgba(0,0,0,0.04);
        }

        /* 标签云、价格参考等 */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
            margin-top: 35px;
        }

        .price-card {
            background-color: var(--bg-pure);
            border-radius: 16px;
            border: 1px solid var(--border-color);
            padding: 30px;
            text-align: center;
            transition: var(--transition-smooth);
        }

        .price-card:hover {
            border-color: var(--primary-pink);
            box-shadow: 0 10px 25px rgba(255, 107, 139, 0.05);
        }

        .price-card.featured {
            border: 2px solid var(--primary-pink);
            background: linear-gradient(180deg, rgba(255, 107, 139, 0.02), var(--bg-pure));
        }

        .price-card h4 {
            font-size: 1.2rem;
            margin-bottom: 15px;
        }

        .price-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .price-num span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* 地图服务网络 & 时间线 */
        .network-layout {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 40px;
        }

        .timeline {
            position: relative;
            border-left: 2px dashed var(--border-color);
            padding-left: 20px;
            margin-left: 10px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 30px;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -27px;
            top: 5px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: var(--primary-blue);
            border: 2px solid var(--bg-pure);
        }

        .timeline-item h4 {
            font-size: 1.05rem;
            margin-bottom: 5px;
        }

        .timeline-item p {
            font-size: 0.88rem;
            color: var(--text-muted);
        }

        /* 需求表单与联系方式 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 50px;
        }

        .contact-form-wrapper {
            background-color: var(--bg-pure);
            border-radius: 24px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: 0 15px 35px rgba(0,0,0,0.02);
        }

        .form-title {
            margin-bottom: 25px;
        }

        .form-title h3 {
            font-size: 1.6rem;
            margin-bottom: 8px;
        }

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

        .form-grid-full {
            grid-column: span 2;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .form-group label {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-main);
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            padding: 12px 16px;
            border-radius: 10px;
            border: 1px solid var(--border-color);
            background-color: #F8FAFC;
            font-size: 0.95rem;
            transition: var(--transition-smooth);
            color: var(--text-main);
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary-pink);
            background-color: #fff;
            box-shadow: 0 0 0 4px rgba(255, 107, 139, 0.1);
        }

        .contact-info-wrapper {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .info-card {
            background-color: var(--bg-pure);
            border-radius: 20px;
            padding: 30px;
            border: 1px solid var(--border-color);
            margin-bottom: 20px;
        }

        .qr-area {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 15px;
        }

        .qr-area img {
            width: 100px;
            height: 100px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        /* FAQ折叠面板 */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--bg-pure);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            background-color: var(--bg-pure);
        }

        .faq-question::after {
            content: '+';
            font-size: 1.3rem;
            color: var(--primary-blue);
            transition: var(--transition-smooth);
        }

        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: var(--transition-smooth);
            color: var(--text-muted);
            font-size: 0.95rem;
        }

        .faq-item.active {
            border-color: var(--primary-blue);
            box-shadow: 0 4px 15px rgba(77, 150, 255, 0.05);
        }

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

        .faq-item.active .faq-answer {
            padding-bottom: 18px;
            max-height: 200px;
        }

        /* 自助排查与百科词汇 */
        .troubleshooting-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 25px;
            margin-bottom: 40px;
        }

        .wiki-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .wiki-card {
            background-color: var(--bg-pure);
            border-radius: 12px;
            padding: 20px;
            border: 1px solid var(--border-color);
        }

        .wiki-card h4 {
            color: var(--primary-pink);
            margin-bottom: 8px;
        }

        /* 资讯文章列表 */
        .articles-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }

        .article-card {
            background-color: var(--bg-pure);
            border-radius: 16px;
            padding: 24px;
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition-smooth);
        }

        .article-card:hover {
            border-color: var(--primary-blue);
            transform: translateY(-3px);
        }

        .article-meta {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .article-card h3 {
            font-size: 1.15rem;
            margin-bottom: 15px;
        }

        /* 浮动组件与返回顶部 */
        .float-panel {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--bg-pure);
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-smooth);
            border: 1px solid var(--border-color);
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--primary-pink);
            color: #fff;
            transform: translateY(-3px);
        }

        .float-btn .tooltip {
            position: absolute;
            right: 60px;
            top: 50%;
            transform: translateY(-50%) translateX(10px);
            background-color: var(--text-main);
            color: #fff;
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 0.8rem;
            white-space: nowrap;
            opacity: 0;
            pointer-events: none;
            transition: var(--transition-smooth);
        }

        .float-btn:hover .tooltip {
            opacity: 1;
            transform: translateY(-50%) translateX(0);
        }

        .float-qr {
            width: 140px;
            padding: 10px;
            background: var(--bg-pure);
            border-radius: 12px;
            box-shadow: 0 6px 20px rgba(0,0,0,0.1);
            position: absolute;
            bottom: 60px;
            right: 0;
            display: none;
            text-align: center;
        }

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

        .float-qr img {
            width: 100%;
            height: auto;
            border-radius: 6px;
        }

        /* 页脚 */
        footer {
            background-color: #1A202C;
            color: #E2E8F0;
            padding: 60px 0 20px 0;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr repeat(3, 1fr) 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo-area img {
            margin-bottom: 15px;
            background: #fff;
            padding: 6px;
            border-radius: 8px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 20px;
            font-weight: 600;
        }

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

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

        .footer-col ul li a {
            color: #A0AEC0;
        }

        .footer-col ul li a:hover {
            color: var(--primary-pink);
        }

        .footer-qr-wrapper {
            text-align: center;
        }

        .footer-qr-wrapper img {
            width: 100px;
            height: 100px;
            border-radius: 8px;
            margin-bottom: 10px;
            background-color: #fff;
            padding: 4px;
        }

        .friend-links {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #2D3748;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links a {
            color: #A0AEC0;
            font-size: 0.85rem;
        }

        .friend-links a:hover {
            color: var(--primary-blue);
        }

        .copyright-area {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #2D3748;
            color: #718096;
            font-size: 0.8rem;
        }

        /* 移动端响应式样式 */
        @media (max-width: 1024px) {
            .intro-grid {
                grid-template-columns: 1fr;
            }
            .network-layout {
                grid-template-columns: 1fr;
            }
            .contact-layout {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-actions {
                display: none;
            }
            nav {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            nav.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .step-timeline {
                grid-template-columns: 1fr;
            }
            .step-item::after {
                display: none;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-grid-full {
                grid-column: span 1;
            }
            .troubleshooting-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .material-showcase {
                grid-template-columns: 1fr;
            }
        }