:root {
            --iuiyl-primary: #0052D9;
            --iuiyl-accent: #7C3AED;
            --iuiyl-bg: #F8FAFC;
            --iuiyl-text: #1E293B;
            --iuiyl-text-light: #64748B;
            --iuiyl-white: #FFFFFF;
            --iuiyl-gradient: linear-gradient(135deg, #0052D9 0%, #7C3AED 100%);
            --iuiyl-glass: rgba(255, 255, 255, 0.8);
            --iuiyl-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            --iuiyl-radius: 16px;
            --iuiyl-max-width: 1400px;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--iuiyl-bg);
            color: var(--iuiyl-text);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* Layout & Spacing */
        .iuiyl-container {
            max-width: var(--iuiyl-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .iuiyl-section {
            padding: 96px 0;
            display: flex;
            flex-wrap: wrap;
        }

        /* Typography */
        h1, h2, h3 {
            line-height: 1.2;
            margin-bottom: 24px;
            white-space: normal;
        }

        h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem); font-weight: 800; letter-spacing: -0.02em; }
        h2 { font-size: clamp(2rem, 3vw + 0.5rem, 3rem); font-weight: 700; }
        h3 { font-size: clamp(1.25rem, 1.5vw + 0.5rem, 1.75rem); font-weight: 600; }
        p { font-size: clamp(1rem, 0.5vw + 0.8rem, 1.125rem); line-height: 1.8; color: var(--iuiyl-text-light); margin-bottom: 16px; word-break: break-word; }

        /* Navigation */
        .iuiyl-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--iuiyl-glass);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }

        .iuiyl-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            height: 80px;
            min-width: 0;
        }

        .iuiyl-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .iuiyl-logo img {
            height: 32px;
            display: block;
        }

        .iuiyl-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .iuiyl-menu-link {
            text-decoration: none;
            color: var(--iuiyl-text);
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s ease;
            position: relative;
            padding: 8px 0;
        }

        .iuiyl-menu-link:hover { color: var(--iuiyl-primary); }
        .iuiyl-menu-link.iuiyl-active { color: var(--iuiyl-primary); font-weight: 700; }
        .iuiyl-menu-link.iuiyl-active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--iuiyl-primary);
        }

        /* Hero Section - Unique Diagonal Split */
        .iuiyl-hero {
            position: relative;
            background: var(--iuiyl-white);
            padding-top: 160px;
            padding-bottom: 120px;
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
        }

        .iuiyl-hero::before {
            content: '';
            position: absolute;
            top: -10%;
            right: -10%;
            width: 60%;
            height: 120%;
            background: var(--iuiyl-gradient);
            clip-path: polygon(20% 0%, 100% 0%, 100% 100%, 0% 100%);
            opacity: 0.05;
            z-index: 0;
        }

        .iuiyl-hero-content {
            flex: 1 1 600px;
            min-width: 0;
            position: relative;
            z-index: 1;
        }

        .iuiyl-hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(0, 82, 217, 0.1);
            color: var(--iuiyl-primary);
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .iuiyl-hero-visual {
            flex: 1 1 500px;
            min-width: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .iuiyl-ai-sphere {
            width: 400px;
            height: 400px;
            background: var(--iuiyl-gradient);
            border-radius: 50%;
            filter: blur(80px);
            opacity: 0.2;
            position: absolute;
            animation: pulse 8s infinite alternate;
        }

        @keyframes pulse {
            0% { transform: scale(1); }
            100% { transform: scale(1.2); }
        }

        .iuiyl-hero-img {
            width: 100%;
            max-width: 650px;
            height: auto;
            border-radius: var(--iuiyl-radius);
            box-shadow: 0 40px 100px rgba(0,0,0,0.1);
            position: relative;
            z-index: 2;
        }

        /* Journey Steps */
        .iuiyl-journey {
            background: var(--iuiyl-bg);
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .iuiyl-journey-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            width: 100%;
        }

        .iuiyl-step-card {
            background: var(--iuiyl-white);
            padding: 48px;
            border-radius: var(--iuiyl-radius);
            box-shadow: var(--iuiyl-shadow);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .iuiyl-step-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .iuiyl-step-num {
            font-size: 64px;
            font-weight: 900;
            background: var(--iuiyl-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            opacity: 0.2;
            margin-bottom: -20px;
        }

        /* AI Features Section */
        .iuiyl-ai-features {
            background: #0F172A;
            color: var(--iuiyl-white);
        }

        .iuiyl-ai-features h2 { color: var(--iuiyl-white); }
        .iuiyl-ai-features p { color: #94A3B8; }

        .iuiyl-feature-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
        }

        .iuiyl-feature-row:nth-child(even) { flex-direction: row-reverse; }

        .iuiyl-feature-text { flex: 1 1 450px; min-width: 0; }
        .iuiyl-feature-media { flex: 1 1 500px; min-width: 0; }

        .iuiyl-glass-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            padding: 32px;
            border-radius: var(--iuiyl-radius);
        }

        /* CTA Section */
        .iuiyl-cta {
            background: var(--iuiyl-gradient);
            text-align: center;
            color: var(--iuiyl-white);
            border-radius: 32px;
            margin: 0 24px 96px;
            padding: 80px 24px;
        }

        .iuiyl-cta h2 { color: var(--iuiyl-white); }

        .iuiyl-btn {
            display: inline-block;
            padding: 18px 48px;
            border-radius: 100px;
            font-weight: 700;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            font-size: 18px;
        }

        .iuiyl-btn-white { background: var(--iuiyl-white); color: var(--iuiyl-primary); }
        .iuiyl-btn-white:hover { transform: scale(1.05); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }

        .iuiyl-btn-primary { background: var(--iuiyl-primary); color: var(--iuiyl-white); box-shadow: 0 10px 25px rgba(0, 82, 217, 0.3); }
        .iuiyl-btn-primary:hover { transform: translateY(-3px); box-shadow: 0 15px 30px rgba(0, 82, 217, 0.4); }

        /* Footer */
        .iuiyl-footer {
            background: var(--iuiyl-white);
            padding: 80px 0 40px;
            border-top: 1px solid rgba(0, 0, 0, 0.05);
        }

        .iuiyl-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 64px;
        }

        .iuiyl-footer-brand { flex: 1 1 300px; min-width: 0; }
        .iuiyl-footer-links { flex: 2 1 600px; display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 32px; min-width: 0; }

        .iuiyl-footer-title { font-size: 16px; font-weight: 700; margin-bottom: 24px; color: var(--iuiyl-text); }
        .iuiyl-footer-list { list-style: none; }
        .iuiyl-footer-list li { margin-bottom: 12px; }
        .iuiyl-footer-list a { text-decoration: none; color: var(--iuiyl-text-light); transition: color 0.3s ease; }
        .iuiyl-footer-list a:hover { color: var(--iuiyl-primary); }

        .iuiyl-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(0, 0, 0, 0.05);
            color: var(--iuiyl-text-light);
            font-size: 14px;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .iuiyl-hero-content { flex: 1 1 100%; text-align: center; margin-bottom: 64px; }
            .iuiyl-hero-visual { flex: 1 1 100%; }
        }

        @media (max-width: 768px) {
            .iuiyl-menu { display: none; } /* Simplified for demo, usually a hamburger */
            .iuiyl-section { padding: 64px 0; }
            .iuiyl-hero { padding-top: 120px; }
            .iuiyl-feature-row { gap: 32px; }
        }