:root {
            --kuarrz-primary: #ff4d4f;
            --kuarrz-primary-hover: #ff7875;
            --kuarrz-secondary: #1890ff;
            --kuarrz-bg: #f8fafc;
            --kuarrz-text-main: #1e293b;
            --kuarrz-text-muted: #64748b;
            --kuarrz-white: #ffffff;
            --kuarrz-card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
            --kuarrz-container-width: 1100px;
            --kuarrz-radius: 16px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            background-color: var(--kuarrz-bg);
            color: var(--kuarrz-text-main);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* Typography */
        h1, h2, h3 {
            line-height: 1.2;
            word-break: keep-all;
            white-space: normal;
        }

        .kuarrz-fluid-h1 { font-size: clamp(2rem, 5vw + 1rem, 3.5rem); font-weight: 800; margin-bottom: 24px; }
        .kuarrz-fluid-h2 { font-size: clamp(1.5rem, 3vw + 0.5rem, 2.25rem); font-weight: 700; margin-bottom: 16px; }
        .kuarrz-fluid-p { font-size: clamp(1rem, 1vw + 0.5rem, 1.125rem); line-height: 1.8; }

        /* Navigation */
        .kuarrz-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .kuarrz-nav-container {
            max-width: var(--kuarrz-container-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .kuarrz-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .kuarrz-logo img {
            height: 32px;
            width: auto;
        }

        .kuarrz-nav-menu {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .kuarrz-nav-link {
            text-decoration: none;
            color: var(--kuarrz-text-main);
            padding: 8px 16px;
            border-radius: 8px;
            font-weight: 500;
            transition: all 0.2s ease;
            font-size: 14px;
        }

        .kuarrz-nav-link:hover {
            color: var(--kuarrz-primary);
            background: rgba(255, 77, 79, 0.05);
        }

        .kuarrz-nav-link.kuarrz-active {
            color: var(--kuarrz-white);
            background: var(--kuarrz-primary);
        }

        /* Hero Section - Unique Layered Design */
        .kuarrz-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at 70% 20%, rgba(255, 77, 79, 0.08) 0%, transparent 40%),
                        radial-gradient(circle at 10% 80%, rgba(24, 144, 255, 0.08) 0%, transparent 40%);
            text-align: center;
            overflow: hidden;
        }

        .kuarrz-hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .kuarrz-hero-badge {
            display: inline-block;
            background: rgba(255, 77, 79, 0.1);
            color: var(--kuarrz-primary);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .kuarrz-sync-visual {
            margin-top: 64px;
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
            min-width: 0;
            flex-wrap: wrap;
        }

        .kuarrz-device-card {
            background: var(--kuarrz-white);
            border-radius: var(--kuarrz-radius);
            padding: 32px;
            box-shadow: var(--kuarrz-card-shadow);
            width: 280px;
            margin: 16px;
            transition: transform 0.3s ease;
            border: 1px solid rgba(0,0,0,0.03);
            min-width: 0;
        }

        .kuarrz-device-card:hover {
            transform: translateY(-8px);
        }

        .kuarrz-sync-icon {
            font-size: 40px;
            margin-bottom: 16px;
            display: block;
        }

        /* Content Sections */
        .kuarrz-section {
            padding: 96px 24px;
            max-width: var(--kuarrz-container-width);
            margin: 0 auto;
        }

        .kuarrz-grid-features {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .kuarrz-feature-item {
            display: flex;
            flex-direction: column;
            gap: 16px;
            background: var(--kuarrz-white);
            padding: 40px;
            border-radius: var(--kuarrz-radius);
            border: 1px solid rgba(0,0,0,0.04);
            min-width: 0;
            transition: box-shadow 0.3s ease;
        }

        .kuarrz-feature-item:hover {
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
        }

        /* Step Guide Section */
        .kuarrz-steps-container {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 64px;
        }

        .kuarrz-step-box {
            flex: 1;
            min-width: 260px;
            background: var(--kuarrz-white);
            padding: 32px;
            border-radius: var(--kuarrz-radius);
            position: relative;
            overflow: hidden;
        }

        .kuarrz-step-number {
            position: absolute;
            top: -10px;
            right: -10px;
            font-size: 80px;
            font-weight: 900;
            color: rgba(0,0,0,0.03);
            line-height: 1;
        }

        /* CTA Section */
        .kuarrz-cta {
            background: var(--kuarrz-text-main);
            color: var(--kuarrz-white);
            border-radius: 32px;
            padding: 64px;
            text-align: center;
            margin: 64px 24px;
            max-width: var(--kuarrz-container-width);
            margin-left: auto;
            margin-right: auto;
        }

        .kuarrz-btn {
            display: inline-block;
            padding: 16px 40px;
            border-radius: 12px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
            font-size: 16px;
            margin: 8px;
        }

        .kuarrz-btn-primary {
            background: var(--kuarrz-primary);
            color: var(--kuarrz-white);
        }

        .kuarrz-btn-primary:hover {
            background: var(--kuarrz-primary-hover);
            transform: scale(1.05);
        }

        /* Footer */
        .kuarrz-footer {
            background: #f1f5f9;
            padding: 80px 24px 40px;
            margin-top: 80px;
        }

        .kuarrz-footer-content {
            max-width: var(--kuarrz-container-width);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 48px;
        }

        .kuarrz-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .kuarrz-footer-brand h4 {
            font-size: 20px;
            margin-bottom: 16px;
            color: var(--kuarrz-primary);
        }

        .kuarrz-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
        }

        .kuarrz-footer-group h5 {
            margin-bottom: 20px;
            font-size: 16px;
        }

        .kuarrz-footer-group ul {
            list-style: none;
        }

        .kuarrz-footer-group li {
            margin-bottom: 12px;
        }

        .kuarrz-footer-group a {
            text-decoration: none;
            color: var(--kuarrz-text-muted);
            font-size: 14px;
            transition: color 0.2s;
        }

        .kuarrz-footer-group a:hover {
            color: var(--kuarrz-primary);
        }

        .kuarrz-copyright {
            max-width: var(--kuarrz-container-width);
            margin: 40px auto 0;
            padding-top: 24px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            color: var(--kuarrz-text-muted);
            font-size: 14px;
        }

        /* Mobile Adjustments */
        @media (max-width: 768px) {
            .kuarrz-nav-menu {
                display: none; /* In real product, this would be a hamburger */
            }
            .kuarrz-hero {
                padding-top: 120px;
            }
            .kuarrz-cta {
                padding: 40px 24px;
            }
            .kuarrz-footer-content {
                flex-direction: column;
                text-align: center;
            }
            .kuarrz-footer-links {
                justify-content: center;
                gap: 32px;
            }
        }