:root {
            --h0u505-primary: #1a73e8;
            --h0u505-success: #34a853;
            --h0u505-warning: #fbbc05;
            --h0u505-danger: #ea4335;
            --h0u505-text-main: #202124;
            --h0u505-text-muted: #5f6368;
            --h0u505-bg-light: #f8f9fa;
            --h0u505-white: #ffffff;
            --h0u505-radius: 16px;
            --h0u505-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --h0u505-container-width: 1320px;
        }

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

        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: break-word;
        }

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

        /* 导航栏 */
        .h0u505-header {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            width: 95%;
            max-width: var(--h0u505-container-width);
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(0,0,0,0.05);
            border-radius: 50px;
            z-index: 1000;
            padding: 12px 24px;
            box-shadow: var(--h0u505-shadow);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }

        .h0u505-logo {
            flex: 0 0 auto;
            display: flex;
            align-items: center;
            margin-right: 24px;
        }

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

        .h0u505-nav {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
        }

        .h0u505-nav-item {
            min-width: 0;
        }

        .h0u505-nav-link {
            text-decoration: none;
            color: var(--h0u505-text-muted);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: clamp(0.875rem, 1vw + 0.5rem, 1rem);
            font-weight: 500;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .h0u505-nav-link:hover {
            color: var(--h0u505-primary);
            background: rgba(26, 115, 232, 0.05);
        }

        .h0u505-nav-link.active {
            color: var(--h0u505-white);
            background: var(--h0u505-primary);
        }

        /* Hero 区块 - 独特非对称布局 */
        .h0u505-hero {
            padding: 160px 0 96px;
            background: radial-gradient(circle at 90% 10%, rgba(26, 115, 232, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 90%, rgba(52, 168, 83, 0.05) 0%, transparent 40%);
            text-align: center;
        }

        .h0u505-hero-content {
            max-width: 900px;
            margin: 0 auto;
        }

        .h0u505-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            letter-spacing: -1px;
            background: linear-gradient(135deg, #1a73e8, #4285f4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .h0u505-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.5rem);
            color: var(--h0u505-text-muted);
            margin-bottom: 48px;
            line-height: 1.5;
        }

        .h0u505-btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .h0u505-btn-primary {
            display: inline-block;
            background: var(--h0u505-primary);
            color: var(--h0u505-white);
            padding: 18px 42px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            box-shadow: 0 8px 20px rgba(26, 115, 232, 0.3);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .h0u505-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(26, 115, 232, 0.4);
        }

        /* 安全防护矩阵 - Grid 布局 */
        .h0u505-section-security {
            padding: 96px 0;
            background-color: var(--h0u505-bg-light);
        }

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

        .h0u505-section-title {
            font-size: clamp(2rem, 3vw + 1rem, 2.8rem);
            margin-bottom: 16px;
        }

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

        .h0u505-security-card {
            background: var(--h0u505-white);
            padding: 48px;
            border-radius: var(--h0u505-radius);
            box-shadow: var(--h0u505-shadow);
            transition: transform 0.3s ease;
            min-width: 0;
            border: 1px solid rgba(0,0,0,0.03);
            display: flex;
            flex-direction: column;
        }

        .h0u505-security-card:hover {
            transform: translateY(-10px);
        }

        .h0u505-card-tag {
            display: inline-block;
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--h0u505-primary);
            margin-bottom: 16px;
            font-weight: 700;
        }

        .h0u505-card-title {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .h0u505-card-text {
            color: var(--h0u505-text-muted);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .h0u505-card-meta {
            font-size: 0.875rem;
            padding-top: 20px;
            border-top: 1px solid #eee;
            color: var(--h0u505-text-main);
            font-weight: 500;
        }

        /* 未来愿景里程碑 - 独特布局 */
        .h0u505-section-vision {
            padding: 96px 0;
        }

        .h0u505-vision-wrapper {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: flex-start;
        }

        .h0u505-vision-intro {
            flex: 1 1 400px;
            min-width: 0;
        }

        .h0u505-vision-list {
            flex: 1 1 500px;
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .h0u505-vision-item {
            background: #fff;
            border-left: 4px solid var(--h0u505-primary);
            padding: 24px 32px;
            border-radius: 0 16px 16px 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
            transition: background 0.3s ease;
        }

        .h0u505-vision-item:nth-child(2) { border-left-color: var(--h0u505-success); }
        .h0u505-vision-item:nth-child(3) { border-left-color: var(--h0u505-warning); }

        .h0u505-vision-year {
            font-weight: 800;
            font-size: 1.25rem;
            margin-bottom: 8px;
            display: block;
        }

        /* 页脚 */
        .h0u505-footer {
            background: #1a1a1a;
            color: #ffffff;
            padding: 80px 0 40px;
        }

        .h0u505-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

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

        .h0u505-footer-text {
            color: #999;
            font-size: 0.9rem;
            max-width: 300px;
        }

        .h0u505-footer-links h4 {
            margin-bottom: 24px;
            font-size: 1.1rem;
        }

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

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

        .h0u505-footer-links a {
            color: #999;
            text-decoration: none;
            transition: color 0.3s ease;
        }

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

        .h0u505-footer-bottom {
            padding-top: 32px;
            border-top: 1px solid #333;
            text-align: center;
            color: #666;
            font-size: 0.85rem;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .h0u505-header {
                top: 0;
                width: 100%;
                border-radius: 0;
                max-width: none;
            }
            .h0u505-nav {
                justify-content: center;
                width: 100%;
                margin-top: 10px;
            }
        }

        @media (max-width: 768px) {
            .h0u505-hero {
                padding: 120px 0 64px;
            }
            .h0u505-nav-link {
                padding: 6px 10px;
                font-size: 0.8rem;
            }
            .h0u505-security-grid {
                grid-template-columns: 1fr;
            }
            .h0u505-vision-wrapper {
                flex-direction: column;
            }
        }