:root {
            --h0u505-google-blue: #4285F4;
            --h0u505-google-red: #EA4335;
            --h0u505-google-yellow: #FBBC05;
            --h0u505-google-green: #34A853;
            --h0u505-text-main: #202124;
            --h0u505-text-light: #5f6368;
            --h0u505-bg-gray: #f8f9fa;
            --h0u505-white: #ffffff;
            --h0u505-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: "Segoe UI", Roboto, Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--h0u505-text-main);
            background-color: var(--h0u505-white);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* Layout Containers */
        .h0u505-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }

        .h0u505-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .h0u505-col {
            min-width: 0;
            flex: 1;
        }

        /* Navigation */
        .h0u505-nav-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: 16px 0;
        }

        .h0u505-nav-container {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .h0u505-logo {
            flex-shrink: 0;
            min-width: 0;
        }

        .h0u505-logo img {
            height: 32px;
            display: block;
        }

        .h0u505-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
        }

        .h0u505-menu-item a {
            text-decoration: none;
            color: var(--h0u505-text-light);
            font-weight: 500;
            font-size: 14px;
            transition: var(--h0u505-transition);
            padding: 8px 4px;
            border-bottom: 2px solid transparent;
        }

        .h0u505-menu-item a:hover {
            color: var(--h0u505-google-blue);
        }

        .h0u505-menu-item.h0u505-active a {
            color: var(--h0u505-google-blue);
            border-bottom-color: var(--h0u505-google-blue);
        }

        /* Hero Section - Unique Layered Design */
        .h0u505-hero {
            padding: 160px 0 96px;
            background: radial-gradient(circle at top right, rgba(66, 133, 244, 0.05), transparent);
            position: relative;
        }

        .h0u505-hero-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 24px;
            align-items: center;
        }

        .h0u505-hero-content {
            grid-column: 1 / span 6;
            z-index: 2;
            word-break: break-word;
        }

        .h0u505-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            margin-bottom: 32px;
            font-weight: 700;
            color: var(--h0u505-text-main);
        }

        .h0u505-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.5rem, 1.4rem);
            color: var(--h0u505-text-light);
            margin-bottom: 48px;
            max-width: 600px;
        }

        .h0u505-hero-image-box {
            grid-column: 6 / span 7;
            position: relative;
            transform: translateX(50px);
        }

        .h0u505-hero-image {
            width: 100%;
            border-radius: 24px;
            box-shadow: 0 40px 80px rgba(0,0,0,0.15);
            transition: var(--h0u505-transition);
        }

        .h0u505-hero-image:hover {
            transform: scale(1.02);
        }

        .h0u505-btn {
            display: inline-block;
            padding: 16px 48px;
            background: var(--h0u505-google-blue);
            color: white;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--h0u505-transition);
            box-shadow: 0 4px 14px rgba(66, 133, 244, 0.39);
        }

        .h0u505-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(66, 133, 244, 0.23);
            background: #3367d6;
        }

        /* Security Matrix Section */
        .h0u505-section-security {
            padding: 96px 0;
            background: #000;
            color: white;
            overflow: hidden;
        }

        .h0u505-security-header {
            text-align: center;
            margin-bottom: 64px;
        }

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

        .h0u505-security-card {
            background: rgba(255, 255, 255, 0.05);
            padding: 48px;
            border-radius: 24px;
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: var(--h0u505-transition);
        }

        .h0u505-security-card:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--h0u505-google-blue);
            transform: translateY(-8px);
        }

        .h0u505-security-tag {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--h0u505-google-blue);
            margin-bottom: 16px;
            display: block;
        }

        .h0u505-security-name {
            font-size: 24px;
            margin-bottom: 16px;
        }

        .h0u505-security-desc {
            color: #bdc1c6;
            font-size: 16px;
        }

        /* Speed Section with Background Metaphor */
        .h0u505-speed-section {
            padding: 128px 0;
            position: relative;
            background-color: var(--h0u505-bg-gray);
        }

        .h0u505-speed-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.15;
            z-index: 1;
        }

        .h0u505-speed-inner {
            position: relative;
            z-index: 2;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .h0u505-speed-text {
            flex: 1;
            min-width: 300px;
        }

        .h0u505-speed-visual {
            flex: 1;
            min-width: 300px;
        }

        .h0u505-speed-visual img {
            width: 100%;
            border-radius: 24px;
            box-shadow: 20px 20px 60px rgba(0,0,0,0.1);
        }

        /* Vision Roadmap Timeline */
        .h0u505-vision-section {
            padding: 96px 0;
        }

        .h0u505-timeline {
            margin-top: 64px;
            position: relative;
        }

        .h0u505-timeline-item {
            display: flex;
            flex-wrap: wrap;
            margin-bottom: 64px;
            align-items: center;
        }

        .h0u505-timeline-year {
            flex: 0 0 150px;
            font-size: 48px;
            font-weight: 800;
            color: var(--h0u505-google-blue);
            opacity: 0.3;
        }

        .h0u505-timeline-dot {
            width: 20px;
            height: 20px;
            background: var(--h0u505-google-blue);
            border-radius: 50%;
            margin: 0 32px;
            position: relative;
        }

        .h0u505-timeline-dot::after {
            content: '';
            position: absolute;
            top: 20px;
            left: 9px;
            width: 2px;
            height: 100px;
            background: #eee;
        }

        .h0u505-timeline-item:last-child .h0u505-timeline-dot::after {
            display: none;
        }

        .h0u505-timeline-content {
            flex: 1;
            min-width: 0;
            background: var(--h0u505-bg-gray);
            padding: 32px;
            border-radius: 16px;
        }

        /* Footer */
        .h0u505-footer {
            background: #f1f3f4;
            padding: 80px 0 40px;
            border-top: 1px solid #e8eaed;
        }

        .h0u505-footer-brand {
            font-size: 24px;
            font-weight: 700;
            color: var(--h0u505-text-main);
            margin-bottom: 24px;
        }

        .h0u505-footer-links {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-bottom: 64px;
        }

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

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

        .h0u505-footer-list a {
            text-decoration: none;
            color: var(--h0u505-text-light);
            font-size: 14px;
            transition: var(--h0u505-transition);
        }

        .h0u505-footer-list a:hover {
            color: var(--h0u505-google-blue);
        }

        .h0u505-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #dadce0;
            font-size: 12px;
            color: var(--h0u505-text-light);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .h0u505-hero-grid {
                display: block;
            }
            .h0u505-hero-image-box {
                transform: none;
                margin-top: 64px;
            }
        }

        @media (max-width: 768px) {
            .h0u505-nav-container {
                justify-content: center;
            }
            .h0u505-menu {
                display: none; /* Mobile menu logic omitted for brevity, usually a hamburger */
            }
            .h0u505-hero {
                padding: 120px 0 64px;
            }
            .h0u505-timeline-year {
                flex: 100%;
                margin-bottom: 16px;
            }
            .h0u505-timeline-dot {
                display: none;
            }
            .h0u505-container {
                padding: 0 20px;
            }
        }