:root {
            --h0u505-chrome-blue: #4285F4;
            --h0u505-chrome-red: #EA4335;
            --h0u505-chrome-yellow: #FBBC05;
            --h0u505-chrome-green: #34A853;
            --h0u505-text-main: #202124;
            --h0u505-text-sub: #5f6368;
            --h0u505-bg-light: #f8f9fa;
            --h0u505-white: #ffffff;
            --h0u505-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --h0u505-radius: 16px;
        }

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

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

        /* 布局容器 */
        .h0u505-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏设计：模拟浏览器标签栏 */
        .h0u505-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid #e0e0e0;
        }

        .h0u505-nav-wrapper {
            display: flex;
            align-items: center;
            height: 72px;
            flex-wrap: wrap;
        }

        .h0u505-logo {
            margin-right: 32px;
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .h0u505-logo img {
            height: 36px;
            width: auto;
        }

        .h0u505-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 4px;
            height: 100%;
            align-items: flex-end;
            min-width: 0;
        }

        .h0u505-nav-item a {
            text-decoration: none;
            color: var(--h0u505-text-sub);
            padding: 12px 16px;
            font-size: 14px;
            font-weight: 500;
            border-radius: 12px 12px 0 0;
            transition: all 0.3s ease;
            display: block;
            word-break: break-word;
        }

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

        .h0u505-nav-item.active a {
            background-color: var(--h0u505-white);
            color: var(--h0u505-chrome-blue);
            box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
            position: relative;
        }

        /* Hero 区：堆叠标签视觉 */
        .h0u505-hero {
            padding: 160px 0 80px;
            background: radial-gradient(circle at top right, #e8f0fe 0%, #ffffff 50%);
            text-align: center;
            overflow: hidden;
        }

        .h0u505-hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .h0u505-hero h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.2;
            margin-bottom: 24px;
            font-weight: 800;
            letter-spacing: -1px;
            word-break: break-word;
        }

        .h0u505-hero p {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            color: var(--h0u505-text-sub);
            margin-bottom: 48px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            word-break: break-word;
        }

        /* 创意标签展示组件 */
        .h0u505-tab-visual {
            display: flex;
            justify-content: center;
            margin-top: 40px;
            perspective: 1000px;
            flex-wrap: wrap;
        }

        .h0u505-tab-card {
            width: 280px;
            height: 180px;
            background: var(--h0u505-white);
            border-radius: var(--h0u505-radius);
            box-shadow: var(--h0u505-shadow);
            margin: -20px;
            padding: 24px;
            text-align: left;
            transition: transform 0.4s ease, z-index 0s;
            border: 1px solid #eee;
            position: relative;
            min-width: 0;
        }

        .h0u505-tab-card:hover {
            transform: translateY(-20px) rotateX(5deg);
            z-index: 10;
            border-color: var(--h0u505-chrome-blue);
        }

        .h0u505-tab-icon {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            margin-bottom: 16px;
            background: var(--h0u505-bg-light);
        }

        /* 核心矩阵区：安全盾 */
        .h0u505-section {
            padding: 96px 0;
            word-break: break-word;
        }

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

        .h0u505-section-title h2 {
            font-size: clamp(2rem, 4vw, 2.5rem);
            margin-bottom: 16px;
        }

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

        .h0u505-matrix-card {
            background: var(--h0u505-bg-light);
            padding: 40px;
            border-radius: var(--h0u505-radius);
            transition: all 0.3s ease;
            min-width: 0;
            display: flex;
            flex-direction: column;
            border: 2px solid transparent;
        }

        .h0u505-matrix-card:hover {
            background: var(--h0u505-white);
            box-shadow: var(--h0u505-shadow);
            border-color: var(--h0u505-chrome-green);
            transform: translateY(-5px);
        }

        .h0u505-matrix-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(52, 168, 83, 0.1);
            color: var(--h0u505-chrome-green);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 16px;
            width: fit-content;
        }

        .h0u505-matrix-card h3 {
            margin-bottom: 16px;
            font-size: 20px;
        }

        /* 未来愿景：时间轴感 */
        .h0u505-vision-section {
            background-color: var(--h0u505-text-main);
            color: var(--h0u505-white);
            padding: 96px 0;
            border-radius: 40px 40px 0 0;
        }

        .h0u505-vision-item {
            display: flex;
            flex-wrap: wrap;
            margin-bottom: 48px;
            align-items: flex-start;
            min-width: 0;
        }

        .h0u505-vision-year {
            font-size: 48px;
            font-weight: 900;
            color: var(--h0u505-chrome-yellow);
            flex: 0 0 150px;
            line-height: 1;
        }

        .h0u505-vision-content {
            flex: 1;
            padding-left: 24px;
            border-left: 2px solid rgba(255,255,255,0.1);
            min-width: 0;
        }

        .h0u505-vision-content h4 {
            font-size: 24px;
            margin-bottom: 12px;
            color: var(--h0u505-white);
        }

        .h0u505-vision-status {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            margin-top: 8px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* 页脚 */
        .h0u505-footer {
            background: var(--h0u505-bg-light);
            padding: 64px 0 32px;
            border-top: 1px solid #eee;
        }

        .h0u505-footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 48px;
        }

        .h0u505-footer-brand {
            flex: 0 0 250px;
            min-width: 0;
        }

        .h0u505-footer-brand h2 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--h0u505-text-main);
        }

        .h0u505-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            min-width: 0;
        }

        .h0u505-footer-col h5 {
            margin-bottom: 20px;
            font-size: 16px;
        }

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

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

        .h0u505-footer-col a {
            color: var(--h0u505-text-sub);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .h0u505-footer-col a:hover {
            color: var(--h0u505-chrome-blue);
        }

        .h0u505-copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid #e0e0e0;
            font-size: 14px;
            color: var(--h0u505-text-sub);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .h0u505-nav-wrapper {
                height: auto;
                padding: 16px 0;
            }
            .h0u505-nav-menu {
                width: 100%;
                margin-top: 16px;
                justify-content: center;
            }
            .h0u505-hero {
                padding: 120px 0 60px;
            }
            .h0u505-vision-item {
                flex-direction: column;
            }
            .h0u505-vision-year {
                margin-bottom: 16px;
            }
            .h0u505-vision-content {
                padding-left: 0;
                border-left: none;
                border-top: 2px solid rgba(255,255,255,0.1);
                padding-top: 16px;
            }
        }