:root {
            --hjuo-primary: #4285F4;
            --hjuo-success: #34A853;
            --hjuo-warning: #FBBC05;
            --hjuo-danger: #EA4335;
            --hjuo-text-dark: #202124;
            --hjuo-text-light: #5f6368;
            --hjuo-bg-gray: #f8f9fa;
            --hjuo-white: #ffffff;
            --hjuo-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        /* Fluid Typography */
        h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem); line-height: 1.1; font-weight: 800; margin-bottom: 24px; white-space: normal; }
        h2 { font-size: clamp(1.8rem, 3vw + 0.5rem, 2.8rem); line-height: 1.2; font-weight: 700; margin-bottom: 32px; white-space: normal; }
        h3 { font-size: clamp(1.2rem, 1.5vw + 0.2rem, 1.8rem); font-weight: 600; margin-bottom: 16px; }
        p { font-size: clamp(1rem, 0.5vw + 0.8rem, 1.2rem); line-height: 1.8; color: var(--hjuo-text-light); }

        .hjuo-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 48px;
        }

        /* Navbar */
        .hjuo-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 16px 0;
        }

        .hjuo-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            min-width: 0;
        }

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

        .hjuo-logo img {
            height: 40px;
            display: block;
        }

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

        .hjuo-menu li a {
            text-decoration: none;
            color: var(--hjuo-text-dark);
            font-weight: 500;
            font-size: 15px;
            transition: var(--hjuo-transition);
            padding: 8px 12px;
            border-radius: 8px;
        }

        .hjuo-menu li a:hover {
            background: rgba(66, 133, 244, 0.08);
            color: var(--hjuo-primary);
        }

        .hjuo-menu li a.hjuo-active {
            background: var(--hjuo-primary);
            color: var(--hjuo-white);
        }

        /* Hero Section - Unique Centered Card Layout */
        .hjuo-hero {
            padding: 180px 0 100px;
            background: radial-gradient(circle at 80% 20%, rgba(66, 133, 244, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 80%, rgba(52, 168, 83, 0.05) 0%, transparent 40%);
            text-align: center;
        }

        .hjuo-hero-badge {
            display: inline-block;
            padding: 8px 24px;
            background: rgba(66, 133, 244, 0.1);
            color: var(--hjuo-primary);
            border-radius: 100px;
            font-weight: 600;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hjuo-hero-content {
            max-width: 900px;
            margin: 0 auto;
            word-break: break-word;
        }

        .hjuo-translation-demo {
            margin-top: 64px;
            background: var(--hjuo-white);
            border-radius: 24px;
            box-shadow: 0 40px 80px rgba(0,0,0,0.1);
            padding: 48px;
            position: relative;
            border: 1px solid rgba(0,0,0,0.05);
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            text-align: left;
        }

        .hjuo-demo-block {
            flex: 1 1 300px;
            min-width: 0;
            padding: 24px;
            border-radius: 16px;
            background: var(--hjuo-bg-gray);
        }

        .hjuo-demo-block.hjuo-translated {
            background: linear-gradient(135deg, #e8f0fe 0%, #f1f3f4 100%);
            border-left: 4px solid var(--hjuo-primary);
        }

        /* Engine Architecture Section */
        .hjuo-section-engine {
            padding: 120px 0;
        }

        .hjuo-grid-engine {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 40px;
            margin-top: 64px;
        }

        .hjuo-card-engine {
            background: var(--hjuo-white);
            padding: 48px;
            border-radius: 32px;
            border: 1px solid #eee;
            transition: var(--hjuo-transition);
            position: relative;
            overflow: hidden;
        }

        .hjuo-card-engine:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            border-color: var(--hjuo-primary);
        }

        .hjuo-card-engine::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--hjuo-primary);
            opacity: 0;
            transition: var(--hjuo-transition);
        }

        .hjuo-card-engine:hover::before {
            opacity: 1;
        }

        .hjuo-engine-tag {
            font-size: 14px;
            font-weight: 700;
            color: var(--hjuo-primary);
            margin-bottom: 12px;
            display: block;
        }

        /* Experience Flow Section */
        .hjuo-section-flow {
            padding: 120px 0;
            background: var(--hjuo-bg-gray);
        }

        .hjuo-flow-container {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            min-width: 0;
        }

        .hjuo-flow-step {
            flex: 1 1 300px;
            min-width: 0;
            padding: 40px;
            background: var(--hjuo-white);
            border-radius: 24px;
            transition: var(--hjuo-transition);
        }

        .hjuo-step-number {
            width: 48px;
            height: 48px;
            background: var(--hjuo-text-dark);
            color: var(--hjuo-white);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin-bottom: 24px;
        }

        /* Footer */
        .hjuo-footer {
            padding: 80px 0 40px;
            background: var(--hjuo-white);
            border-top: 1px solid #eee;
            text-align: center;
        }

        .hjuo-footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: var(--hjuo-text-dark);
            margin-bottom: 16px;
        }

        .hjuo-footer-copy {
            color: var(--hjuo-text-light);
            font-size: 14px;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .hjuo-container { padding: 0 32px; }
            .hjuo-nav-wrapper { justify-content: center; gap: 20px; }
        }

        @media (max-width: 768px) {
            .hjuo-menu { justify-content: center; gap: 12px; }
            .hjuo-hero { padding: 140px 0 60px; }
            .hjuo-grid-engine { grid-template-columns: 1fr; }
            .hjuo-flow-step { flex: 1 1 100%; }
        }