:root {
            --h0u505-primary: #4285F4;
            --h0u505-success: #34A853;
            --h0u505-warning: #FBBC05;
            --h0u505-danger: #EA4335;
            --h0u505-text: #202124;
            --h0u505-text-light: #5f6368;
            --h0u505-bg: #ffffff;
            --h0u505-bg-alt: #f8f9fa;
            --h0u505-border: #dadce0;
            --h0u505-container-width: 1300px;
            --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 Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--h0u505-text);
            background-color: var(--h0u505-bg);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        /* 导航栏样式 */
        .h0u505-navbar {
            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 var(--h0u505-border);
            padding: 12px 0;
        }

        .h0u505-nav-container {
            max-width: var(--h0u505-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .h0u505-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

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

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

        .h0u505-nav-link {
            text-decoration: none;
            color: var(--h0u505-text-light);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 4px;
            transition: var(--h0u505-transition);
            white-space: nowrap;
        }

        .h0u505-nav-link:hover {
            background-color: rgba(66, 133, 244, 0.05);
            color: var(--h0u505-primary);
        }

        .h0u505-nav-link.active {
            color: var(--h0u505-primary);
            background-color: rgba(66, 133, 244, 0.1);
        }

        /* Hero 区块 - 独特非对称布局 */
        .h0u505-hero {
            padding: 160px 24px 96px;
            background: radial-gradient(circle at 80% 20%, rgba(66, 133, 244, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 20% 80%, rgba(52, 168, 83, 0.05) 0%, transparent 40%);
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .h0u505-hero-inner {
            max-width: 1000px;
            text-align: center;
            flex-wrap: wrap;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .h0u505-hero-tag {
            background: linear-gradient(90deg, var(--h0u505-primary), var(--h0u505-success));
            color: white;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: bold;
            margin-bottom: 24px;
            display: inline-block;
        }

        .h0u505-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            color: var(--h0u505-text);
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }

        .h0u505-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--h0u505-text-light);
            max-width: 700px;
            margin-bottom: 48px;
            line-height: 1.6;
        }

        /* 同步状态模拟卡片 */
        .h0u505-sync-visual {
            width: 100%;
            max-width: 850px;
            background: white;
            border-radius: 24px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.08);
            border: 1px solid var(--h0u505-border);
            padding: 32px;
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            position: relative;
            z-index: 1;
        }

        .h0u505-visual-item {
            flex: 1;
            min-width: 200px;
            padding: 24px;
            background: var(--h0u505-bg-alt);
            border-radius: 16px;
            text-align: left;
            transition: var(--h0u505-transition);
            border: 1px solid transparent;
        }

        .h0u505-visual-item:hover {
            transform: translateY(-8px);
            border-color: var(--h0u505-primary);
            background: white;
            box-shadow: 0 10px 30px rgba(66, 133, 244, 0.1);
        }

        .h0u505-visual-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: white;
        }

        /* 安全矩阵区块 */
        .h0u505-section {
            padding: 96px 24px;
            max-width: var(--h0u505-container-width);
            margin: 0 auto;
        }

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

        .h0u505-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

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

        .h0u505-matrix-card {
            padding: 40px;
            border-radius: 20px;
            background: #fff;
            border: 1px solid var(--h0u505-border);
            transition: var(--h0u505-transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .h0u505-matrix-card:hover {
            box-shadow: 0 15px 35px rgba(0,0,0,0.05);
        }

        .h0u505-matrix-label {
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--h0u505-primary);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .h0u505-matrix-name {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .h0u505-matrix-logic {
            color: var(--h0u505-text-light);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .h0u505-matrix-meta {
            padding-top: 16px;
            border-top: 1px dashed var(--h0u505-border);
            font-size: 13px;
            color: var(--h0u505-success);
            font-weight: 500;
        }

        /* 愿景时间轴 */
        .h0u505-vision-bg {
            background-color: var(--h0u505-text);
            color: white;
            padding: 96px 24px;
        }

        .h0u505-vision-container {
            max-width: 1100px;
            margin: 0 auto;
        }

        .h0u505-timeline {
            position: relative;
            padding: 48px 0;
        }

        .h0u505-timeline-item {
            display: flex;
            margin-bottom: 64px;
            gap: 48px;
            flex-wrap: wrap;
            position: relative;
        }

        .h0u505-timeline-year {
            flex: 0 0 120px;
            font-size: 32px;
            font-weight: 800;
            color: var(--h0u505-primary);
            position: relative;
        }

        .h0u505-timeline-content {
            flex: 1;
            min-width: 280px;
        }

        .h0u505-timeline-focus {
            font-size: 24px;
            margin-bottom: 12px;
            color: #fff;
        }

        .h0u505-timeline-status {
            display: inline-block;
            padding: 4px 12px;
            border: 1px solid rgba(255,255,255,0.3);
            border-radius: 4px;
            font-size: 12px;
            color: rgba(255,255,255,0.6);
        }

        /* 页脚 */
        .h0u505-footer {
            background: var(--h0u505-bg-alt);
            padding: 64px 24px;
            border-top: 1px solid var(--h0u505-border);
        }

        .h0u505-footer-grid {
            max-width: var(--h0u505-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
        }

        .h0u505-footer-brand h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--h0u505-text);
        }

        .h0u505-footer-brand p {
            font-size: 14px;
            color: var(--h0u505-text-light);
        }

        .h0u505-footer-links h4 {
            margin-bottom: 20px;
            font-size: 16px;
        }

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

        .h0u505-footer-links li {
            margin-bottom: 10px;
        }

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

        .h0u505-footer-links a:hover {
            color: var(--h0u505-primary);
        }

        .h0u505-copyright {
            max-width: var(--h0u505-container-width);
            margin: 48px auto 0;
            padding-top: 24px;
            border-top: 1px solid var(--h0u505-border);
            text-align: center;
            font-size: 12px;
            color: var(--h0u505-text-light);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .h0u505-nav-menu {
                display: none; /* 简化移动端，实际开发中应使用汉堡菜单 */
            }
            .h0u505-hero {
                padding-top: 120px;
            }
            .h0u505-timeline-item {
                flex-direction: column;
                gap: 16px;
            }
            .h0u505-timeline-year {
                flex: none;
            }
        }