:root {
            --h0u505-chrome-blue: #1a73e8;
            --h0u505-chrome-red: #ea4335;
            --h0u505-chrome-yellow: #fbbc04;
            --h0u505-chrome-green: #34a853;
            --h0u505-text-main: #202124;
            --h0u505-text-sub: #5f6368;
            --h0u505-bg-light: #f8f9fa;
            --h0u505-white: #ffffff;
            --h0u505-radius: 16px;
            --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", sans-serif;
            color: var(--h0u505-text-main);
            background-color: var(--h0u505-white);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        .h0u505-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .h0u505-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .h0u505-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            min-width: 0;
        }

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

        .h0u505-logo img {
            height: 40px;
            display: block;
        }

        .h0u505-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

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

        .h0u505-nav-item a:hover {
            background: rgba(26, 115, 232, 0.05);
            color: var(--h0u505-chrome-blue);
        }

        .h0u505-nav-item a.h0u505-active {
            background: var(--h0u505-chrome-blue);
            color: var(--h0u505-white);
        }

        /* Hero 区块 */
        .h0u505-hero {
            padding: 160px 0 80px;
            text-align: center;
            background: radial-gradient(circle at 50% -20%, #e8f0fe 0%, #ffffff 60%);
        }

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

        .h0u505-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            margin-bottom: 24px;
            font-weight: 700;
            background: linear-gradient(135deg, #1a73e8, #4285f4);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .h0u505-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.8rem, 1.4rem);
            color: var(--h0u505-text-sub);
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 核心步骤区 */
        .h0u505-guide-section {
            padding: 80px 0;
        }

        .h0u505-section-title {
            text-align: center;
            font-size: clamp(1.8rem, 3vw + 0.5rem, 2.5rem);
            margin-bottom: 64px;
            font-weight: 600;
        }

        .h0u505-step-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            flex-wrap: wrap;
        }

        .h0u505-step-card {
            background: var(--h0u505-bg-light);
            padding: 40px;
            border-radius: var(--h0u505-radius);
            transition: var(--h0u505-transition);
            border: 1px solid transparent;
            min-width: 0;
            overflow-wrap: break-word;
        }

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

        .h0u505-step-num {
            width: 48px;
            height: 48px;
            background: var(--h0u505-chrome-blue);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-weight: bold;
            font-size: 20px;
            margin-bottom: 24px;
        }

        .h0u505-step-card:nth-child(2) .h0u505-step-num { background: var(--h0u505-chrome-red); }
        .h0u505-step-card:nth-child(3) .h0u505-step-num { background: var(--h0u505-chrome-yellow); }

        .h0u505-step-card h3 {
            font-size: 22px;
            margin-bottom: 16px;
        }

        /* 安全矩阵区 */
        .h0u505-security-section {
            padding: 96px 0;
            background-color: #1a73e8;
            color: var(--h0u505-white);
            border-radius: 40px;
            margin: 0 24px;
        }

        .h0u505-matrix-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 48px;
            min-width: 0;
        }

        .h0u505-matrix-item {
            flex: 1 1 300px;
            min-width: 0;
            background: rgba(255, 255, 255, 0.1);
            padding: 32px;
            border-radius: 20px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: var(--h0u505-transition);
        }

        .h0u505-matrix-item:hover {
            background: rgba(255, 255, 255, 0.2);
        }

        .h0u505-layer-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--h0u505-chrome-green);
            font-size: 12px;
            border-radius: 12px;
            margin-bottom: 16px;
            text-transform: uppercase;
            font-weight: bold;
        }

        .h0u505-matrix-item h4 {
            font-size: 20px;
            margin-bottom: 12px;
        }

        .h0u505-matrix-item p {
            font-size: 15px;
            opacity: 0.9;
        }

        /* 未来愿景区 */
        .h0u505-vision-section {
            padding: 96px 0;
        }

        .h0u505-vision-timeline {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            justify-content: center;
            min-width: 0;
        }

        .h0u505-vision-card {
            flex: 1 1 280px;
            min-width: 0;
            text-align: center;
            padding: 32px;
            border-top: 4px solid var(--h0u505-chrome-blue);
            background: var(--h0u505-bg-light);
            border-radius: 0 0 16px 16px;
        }

        .h0u505-vision-card:nth-child(2) { border-color: var(--h0u505-chrome-green); }
        .h0u505-vision-card:nth-child(3) { border-color: var(--h0u505-chrome-red); }

        .h0u505-vision-year {
            font-size: 32px;
            font-weight: 800;
            color: var(--h0u505-chrome-blue);
            margin-bottom: 16px;
            display: block;
        }

        /* 资讯区标记 */
        .h0u505-news-section {
            padding: 80px 0;
            background: #fdfdfd;
        }

        /* 页脚 */
        .h0u505-footer {
            background: #f8f9fa;
            padding: 64px 0 32px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .h0u505-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            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: 48px;
            min-width: 0;
        }

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

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

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

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

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

        .h0u505-copyright {
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            font-size: 13px;
            color: var(--h0u505-text-sub);
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .h0u505-nav-menu {
                display: none; /* 简化移动端处理 */
            }
            .h0u505-hero {
                padding: 120px 0 60px;
            }
            .h0u505-security-section {
                margin: 0 16px;
                border-radius: 24px;
                padding: 48px 24px;
            }
            .h0u505-step-card {
                padding: 24px;
            }
        }