:root {
            --h0u505-chrome-blue: #4285F4;
            --h0u505-chrome-red: #EA4335;
            --h0u505-chrome-yellow: #FBBC05;
            --h0u505-chrome-green: #34A853;
            --h0u505-text-main: #202124;
            --h0u505-text-light: #5f6368;
            --h0u505-bg-gray: #f8f9fa;
            --h0u505-white: #ffffff;
            --h0u505-border: #dadce0;
            --h0u505-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --h0u505-container-width: 1320px;
        }

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

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

        /* 布局基础 */
        .h0u505-flex { display: flex; flex-wrap: wrap; }
        .h0u505-container { 
            max-width: var(--h0u505-container-width); 
            margin: 0 auto; 
            padding: 0 32px;
            width: 100%;
        }
        .h0u505-section { padding: 96px 0; position: relative; }

        /* 导航栏 */
        .h0u505-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--h0u505-border);
            transition: var(--h0u505-transition);
        }

        .h0u505-nav-wrapper {
            height: 72px;
            align-items: center;
            justify-content: space-between;
        }

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

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

        .h0u505-menu {
            list-style: none;
            gap: 8px;
            align-items: center;
        }

        .h0u505-menu-item a {
            text-decoration: none;
            color: var(--h0u505-text-light);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            transition: var(--h0u505-transition);
            display: inline-block;
            white-space: nowrap;
        }

        .h0u505-menu-item a:hover {
            background-color: var(--h0u505-bg-gray);
            color: var(--h0u505-chrome-blue);
        }

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

        /* Hero 区域 - 独特控制台布局 */
        .h0u505-hero {
            padding-top: 160px;
            background: radial-gradient(circle at 10% 20%, rgba(66, 133, 244, 0.05) 0%, transparent 40%);
            min-height: 80vh;
            display: flex;
            align-items: center;
        }

        .h0u505-hero-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
            gap: 64px;
            align-items: center;
        }

        .h0u505-hero-content {
            min-width: 0;
        }

        .h0u505-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            margin-bottom: 24px;
            font-weight: 700;
            letter-spacing: -1px;
        }

        .h0u505-hero-subtitle {
            font-size: clamp(1.125rem, 1.5vw + 0.5rem, 1.5rem);
            color: var(--h0u505-text-light);
            margin-bottom: 40px;
            max-width: 600px;
            line-height: 1.6;
        }

        .h0u505-hero-visual {
            position: relative;
            background: #202124;
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 40px 80px rgba(0,0,0,0.15);
            border: 1px solid #3c4043;
            aspect-ratio: 16/10;
        }

        .h0u505-code-mockup {
            font-family: 'Courier New', Courier, monospace;
            color: #8ab4f8;
            font-size: 14px;
        }

        .h0u505-code-line {
            margin-bottom: 8px;
            display: flex;
            gap: 12px;
        }

        .h0u505-line-num { color: #5f6368; min-width: 20px; }

        /* 安全矩阵 - 模块化设计 */
        .h0u505-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .h0u505-matrix-card {
            background: var(--h0u505-bg-gray);
            border-radius: 24px;
            padding: 40px;
            transition: var(--h0u505-transition);
            border: 1px solid transparent;
            min-width: 0;
        }

        .h0u505-matrix-card:hover {
            background: var(--h0u505-white);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            border-color: var(--h0u505-border);
            transform: translateY(-8px);
        }

        .h0u505-card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--h0u505-white);
            border-radius: 12px;
            font-size: 12px;
            font-weight: 700;
            color: var(--h0u505-chrome-blue);
            margin-bottom: 24px;
            text-transform: uppercase;
        }

        .h0u505-card-title {
            font-size: 24px;
            margin-bottom: 16px;
            font-weight: 600;
        }

        /* 愿景里程碑 - 时间轴设计 */
        .h0u505-vision-section {
            background: #202124;
            color: var(--h0u505-white);
            border-radius: 40px;
            margin: 0 24px;
        }

        .h0u505-timeline {
            position: relative;
            max-width: 900px;
            margin: 64px auto 0;
        }

        .h0u505-timeline-item {
            padding: 40px 0;
            border-bottom: 1px solid #3c4043;
            display: flex;
            gap: 48px;
            min-width: 0;
        }

        .h0u505-year {
            font-size: 32px;
            font-weight: 700;
            color: var(--h0u505-chrome-blue);
            flex: 0 0 120px;
        }

        .h0u505-vision-content {
            flex: 1;
        }

        .h0u505-status-pill {
            display: inline-block;
            padding: 4px 12px;
            border: 1px solid #5f6368;
            border-radius: 100px;
            font-size: 13px;
            margin-top: 16px;
        }

        /* 页脚 */
        .h0u505-footer {
            background: var(--h0u505-bg-gray);
            padding: 80px 0 40px;
            margin-top: 96px;
        }

        .h0u505-footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            border-bottom: 1px solid var(--h0u505-border);
            padding-bottom: 48px;
            margin-bottom: 40px;
        }

        .h0u505-brand-info {
            max-width: 300px;
            min-width: 0;
        }

        .h0u505-footer-brand-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--h0u505-text-main);
        }

        .h0u505-copyright {
            font-size: 14px;
            color: var(--h0u505-text-light);
            text-align: center;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .h0u505-container { padding: 0 20px; }
            .h0u505-menu { display: none; } /* 移动端通常应有汉堡菜单，此处简化 */
            .h0u505-hero-grid { grid-template-columns: 1fr; }
            .h0u505-hero { padding-top: 120px; }
            .h0u505-vision-section { margin: 0; border-radius: 0; }
            .h0u505-timeline-item { flex-direction: column; gap: 16px; }
            .h0u505-year { flex: none; }
        }

        /* 按钮样式 */
        .h0u505-btn {
            display: inline-block;
            padding: 16px 32px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--h0u505-transition);
            cursor: pointer;
            border: none;
        }

        .h0u505-btn-primary {
            background: var(--h0u505-chrome-blue);
            color: var(--h0u505-white);
        }

        .h0u505-btn-primary:hover {
            box-shadow: 0 8px 24px rgba(66, 133, 244, 0.3);
            transform: translateY(-2px);
        }