:root {
            --kuarrz-primary: #FF6600;
            --kuarrz-primary-hover: #E65C00;
            --kuarrz-text-dark: #222222;
            --kuarrz-text-light: #666666;
            --kuarrz-bg-white: #FFFFFF;
            --kuarrz-bg-alt: #F8F9FA;
            --kuarrz-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --kuarrz-radius: 16px;
            --kuarrz-container-max: 1400px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--kuarrz-text-dark);
            background-color: var(--kuarrz-bg-white);
            line-height: 1.6;
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        ul {
            list-style: none;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* Layout Helpers */
        .kuarrz-container {
            max-width: var(--kuarrz-container-max);
            margin: 0 auto;
            padding: 0 48px;
            width: 100%;
        }

        .kuarrz-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .kuarrz-flex-item {
            min-width: 0;
        }

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

        .kuarrz-fluid-h1 {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            margin-bottom: 24px;
        }

        .kuarrz-fluid-h2 {
            font-size: clamp(1.5rem, 3vw + 0.5rem, 2.5rem);
            font-weight: 700;
            margin-bottom: 24px;
        }

        .kuarrz-fluid-p {
            font-size: clamp(1rem, 1vw + 0.5rem, 1.25rem);
            color: var(--kuarrz-text-light);
            word-break: break-word;
            overflow-wrap: break-word;
            line-height: 1.8;
        }

        /* Navigation */
        .kuarrz-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            padding: 24px 0;
            transition: all 0.4s ease;
        }

        .kuarrz-header.kuarrz-scrolled {
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(20px);
            padding: 16px 0;
            box-shadow: var(--kuarrz-shadow);
        }

        .kuarrz-nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .kuarrz-logo img {
            height: 40px;
            width: auto;
        }

        .kuarrz-nav-menu {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .kuarrz-nav-link {
            font-weight: 500;
            font-size: 16px;
            position: relative;
        }

        .kuarrz-nav-link:hover {
            color: var(--kuarrz-primary);
        }

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

        .kuarrz-nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--kuarrz-primary);
            border-radius: 2px;
        }

        /* Hero Section */
        .kuarrz-hero {
            position: relative;
            padding: 180px 0 100px;
            background: var(--kuarrz-bg-alt);
            overflow: hidden;
        }

        .kuarrz-hero-content {
            flex: 1;
            min-width: 300px;
            z-index: 2;
        }

        .kuarrz-hero-visual {
            flex: 1;
            min-width: 350px;
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .kuarrz-hero-img-box {
            position: relative;
            width: 100%;
            max-width: 600px;
            border-radius: var(--kuarrz-radius);
            overflow: hidden;
            box-shadow: var(--kuarrz-shadow);
            transform: perspective(1000px) rotateY(-5deg);
            transition: transform 0.5s ease;
        }

        .kuarrz-hero-img-box:hover {
            transform: perspective(1000px) rotateY(0deg) translateY(-10px);
        }

        .kuarrz-btn {
            display: inline-block;
            padding: 16px 48px;
            background: var(--kuarrz-primary);
            color: white;
            border-radius: 50px;
            font-weight: 600;
            font-size: 18px;
            margin-top: 32px;
            box-shadow: 0 4px 15px rgba(255, 102, 0, 0.3);
        }

        .kuarrz-btn:hover {
            background: var(--kuarrz-primary-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(255, 102, 0, 0.4);
        }

        /* Feature Sections */
        .kuarrz-section {
            padding: 120px 0;
        }

        .kuarrz-grid-feature {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 48px;
            align-items: center;
        }

        .kuarrz-feature-card {
            background: var(--kuarrz-bg-white);
            border-radius: var(--kuarrz-radius);
            padding: 0;
            overflow: hidden;
            box-shadow: var(--kuarrz-shadow);
            transition: transform 0.3s ease;
        }

        .kuarrz-feature-card:hover {
            transform: translateY(-10px);
        }

        .kuarrz-card-image {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }

        .kuarrz-card-body {
            padding: 32px;
        }

        .kuarrz-section-title-area {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 64px;
        }

        /* Split Section */
        .kuarrz-split-section {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .kuarrz-split-text {
            flex: 1;
            min-width: 300px;
        }

        .kuarrz-split-media {
            flex: 1;
            min-width: 300px;
        }

        .kuarrz-img-styled {
            border-radius: var(--kuarrz-radius);
            box-shadow: var(--kuarrz-shadow);
        }

        /* Sync Section - Dark Variant */
        .kuarrz-sync-section {
            background: #1a1a1a;
            color: #ffffff;
            border-radius: 40px;
            margin: 40px 24px;
            padding: 96px 48px;
        }

        .kuarrz-sync-section .kuarrz-fluid-p {
            color: rgba(255,255,255,0.7);
        }

        /* Footer */
        .kuarrz-footer {
            background: var(--kuarrz-bg-alt);
            padding: 96px 0 48px;
            border-top: 1px solid #eee;
        }

        .kuarrz-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .kuarrz-footer-brand h2 {
            font-size: 24px;
            color: var(--kuarrz-primary);
            margin-bottom: 16px;
        }

        .kuarrz-footer-links h4 {
            font-size: 18px;
            margin-bottom: 24px;
        }

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

        .kuarrz-footer-links a:hover {
            color: var(--kuarrz-primary);
            padding-left: 5px;
        }

        .kuarrz-copyright {
            text-align: center;
            padding-top: 48px;
            border-top: 1px solid #ddd;
            color: var(--kuarrz-text-light);
            font-size: 14px;
        }

        /* Mobile Adjustments */
        @media (max-width: 768px) {
            .kuarrz-container {
                padding: 0 24px;
            }
            .kuarrz-nav-menu {
                display: none; /* In real site, add hamburger */
            }
            .kuarrz-hero {
                padding: 140px 0 60px;
                text-align: center;
            }
            .kuarrz-hero-visual {
                margin-top: 48px;
            }
            .kuarrz-section {
                padding: 64px 0;
            }
            .kuarrz-sync-section {
                margin: 20px 10px;
                padding: 48px 24px;
            }
        }