:root {
            --h0u505-chrome-blue: #4285F4;
            --h0u505-chrome-red: #EA4335;
            --h0u505-chrome-yellow: #FBBC05;
            --h0u505-chrome-green: #34A853;
            --h0u505-text-dark: #202124;
            --h0u505-text-light: #5f6368;
            --h0u505-bg-soft: #f8f9fa;
            --h0u505-white: #ffffff;
            --h0u505-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --h0u505-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            color: var(--h0u505-text-dark);
            line-height: 1.6;
            background-color: var(--h0u505-white);
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* Layout Container */
        .h0u505-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* Navigation */
        .h0u505-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            height: 72px;
            display: flex;
            align-items: center;
        }

        .h0u505-nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            flex-wrap: wrap;
        }

        .h0u505-logo {
            flex-shrink: 0;
            width: 160px;
            display: flex;
            align-items: center;
        }

        .h0u505-logo img {
            height: 32px;
            width: auto;
        }

        .h0u505-menu {
            display: flex;
            list-style: none;
            gap: 16px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .h0u505-menu li {
            min-width: 0;
        }

        .h0u505-menu a {
            text-decoration: none;
            color: var(--h0u505-text-light);
            font-size: 0.95rem;
            padding: 8px 12px;
            border-radius: 8px;
            transition: var(--h0u505-transition);
            white-space: nowrap;
        }

        .h0u505-menu a:hover {
            background: rgba(66, 133, 244, 0.05);
            color: var(--h0u505-chrome-blue);
        }

        .h0u505-menu a.h0u505-active {
            color: var(--h0u505-chrome-blue);
            font-weight: 600;
            background: rgba(66, 133, 244, 0.1);
        }

        /* Hero Section - Unique Diagonal Layout */
        .h0u505-hero {
            padding: 160px 0 96px;
            background: radial-gradient(circle at 90% 10%, rgba(66, 133, 244, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, rgba(52, 168, 83, 0.05) 0%, transparent 40%);
            position: relative;
            overflow: hidden;
        }

        .h0u505-hero-grid {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .h0u505-hero-content {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .h0u505-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.1;
            margin-bottom: 24px;
            font-weight: 700;
            color: var(--h0u505-text-dark);
        }

        .h0u505-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--h0u505-text-light);
            margin-bottom: 40px;
            max-width: 600px;
            line-height: 1.6;
        }

        .h0u505-download-card {
            background: var(--h0u505-white);
            padding: 40px;
            border-radius: 24px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.1);
            border: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            flex: 0 0 400px;
            min-width: 300px;
            position: relative;
            z-index: 2;
        }

        .h0u505-btn-primary {
            display: inline-block;
            background: var(--h0u505-chrome-blue);
            color: white;
            padding: 18px 48px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--h0u505-transition);
            box-shadow: 0 10px 20px rgba(66, 133, 244, 0.3);
            margin-bottom: 16px;
        }

        .h0u505-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(66, 133, 244, 0.4);
            background: #3367d6;
        }

        .h0u505-os-info {
            font-size: 0.85rem;
            color: var(--h0u505-text-light);
        }

        /* Security Matrix Section */
        .h0u505-security-section {
            padding: 96px 0;
            background: #fafafa;
        }

        .h0u505-section-tag {
            text-transform: uppercase;
            color: var(--h0u505-chrome-blue);
            font-weight: 700;
            letter-spacing: 2px;
            font-size: 0.9rem;
            margin-bottom: 16px;
            display: block;
        }

        .h0u505-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 48px;
            max-width: 800px;
        }

        .h0u505-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .h0u505-matrix-card {
            background: var(--h0u505-white);
            padding: 32px;
            border-radius: 16px;
            border-top: 4px solid var(--h0u505-chrome-blue);
            transition: var(--h0u505-transition);
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
        }

        .h0u505-matrix-card:nth-child(2) { border-top-color: var(--h0u505-chrome-red); }
        .h0u505-matrix-card:nth-child(3) { border-top-color: var(--h0u505-chrome-yellow); }

        .h0u505-matrix-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.1);
        }

        .h0u505-layer-name {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--h0u505-text-dark);
        }

        .h0u505-protection-logic {
            font-size: 1rem;
            color: var(--h0u505-text-light);
            margin-bottom: 20px;
        }

        .h0u505-security-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.8rem;
            font-weight: 600;
            padding-top: 16px;
            border-top: 1px solid #eee;
        }

        /* Future Vision Section */
        .h0u505-vision-section {
            padding: 120px 0;
            position: relative;
        }

        .h0u505-milestone-container {
            display: flex;
            flex-direction: column;
            gap: 64px;
            position: relative;
        }

        .h0u505-milestone-container::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--h0u505-chrome-blue), var(--h0u505-chrome-green), var(--h0u505-chrome-yellow), var(--h0u505-chrome-red));
            transform: translateX(-50%);
        }

        .h0u505-milestone-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            position: relative;
        }

        .h0u505-milestone-item:nth-child(even) {
            flex-direction: row-reverse;
        }

        .h0u505-milestone-content {
            width: 45%;
            padding: 32px;
            background: var(--h0u505-bg-soft);
            border-radius: 20px;
            min-width: 0;
        }

        .h0u505-year {
            font-size: 2.5rem;
            font-weight: 900;
            color: rgba(0,0,0,0.05);
            margin-bottom: -20px;
            display: block;
        }

        .h0u505-focus {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
        }

        .h0u505-status {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            background: var(--h0u505-chrome-green);
            color: white;
            font-weight: 600;
        }

        /* Footer */
        .h0u505-footer {
            background: var(--h0u505-text-dark);
            color: #ccc;
            padding: 80px 0 40px;
        }

        .h0u505-footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: white;
            margin-bottom: 24px;
            display: block;
        }

        .h0u505-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 60px;
        }

        .h0u505-footer-links {
            list-style: none;
        }

        .h0u505-footer-links li {
            margin-bottom: 12px;
        }

        .h0u505-footer-links a {
            color: #999;
            text-decoration: none;
            transition: var(--h0u505-transition);
        }

        .h0u505-footer-links a:hover {
            color: white;
        }

        .h0u505-copyright {
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 0.85rem;
        }

        /* Responsive Fixes */
        @media (max-width: 1024px) {
            .h0u505-milestone-container::before { left: 20px; transform: none; }
            .h0u505-milestone-item, .h0u505-milestone-item:nth-child(even) { flex-direction: row; padding-left: 60px; }
            .h0u505-milestone-content { width: 100%; }
        }

        @media (max-width: 768px) {
            .h0u505-header { height: auto; padding: 16px 0; }
            .h0u505-menu { margin-top: 16px; justify-content: center; width: 100%; }
            .h0u505-hero { padding: 120px 0 64px; }
            .h0u505-hero-content { text-align: center; }
            .h0u505-hero-subtitle { margin: 0 auto 40px; }
            .h0u505-download-card { flex: 1 1 100%; }
            .h0u505-matrix-grid { grid-template-columns: 1fr; }
        }
    

@keyframes spin {100% {transform: rotate(360deg);}}