:root {
            --h0u505-chrome-blue: #4285F4;
            --h0u505-chrome-red: #EA4335;
            --h0u505-chrome-yellow: #FBBC05;
            --h0u505-chrome-green: #34A853;
            --h0u505-bg-light: #F8F9FA;
            --h0u505-text-main: #202124;
            --h0u505-text-sub: #5F6368;
            --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: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
            color: var(--h0u505-text-main);
            background-color: var(--h0u505-bg-light);
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* 导航栏 */
        .h0u505-navbar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 72px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            display: flex;
            align-items: center;
        }

        .h0u505-nav-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            width: 100%;
        }

        .h0u505-logo {
            flex-shrink: 0;
        }

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

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

        .h0u505-menu li {
            min-width: 0;
        }

        .h0u505-menu a {
            text-decoration: none;
            color: var(--h0u505-text-sub);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .h0u505-menu a:hover {
            color: var(--h0u505-chrome-blue);
            background: rgba(66, 133, 244, 0.05);
        }

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

        /* Hero 区块 - 独特诊断布局 */
        .h0u505-hero {
            padding: 160px 0 80px;
            background: radial-gradient(circle at 10% 20%, rgba(66, 133, 244, 0.05) 0%, transparent 50%),
                        radial-gradient(circle at 90% 80%, rgba(52, 168, 83, 0.05) 0%, transparent 50%);
            text-align: center;
        }

        .h0u505-hero-card {
            background: var(--h0u505-white);
            border-radius: 32px;
            padding: 48px;
            box-shadow: var(--h0u505-shadow);
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .h0u505-status-icon {
            width: 80px;
            height: 80px;
            background: #FEEFC3;
            border-radius: 50%;
            margin: 0 auto 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .h0u505-status-icon::after {
            content: "!";
            font-size: 40px;
            font-weight: bold;
            color: var(--h0u505-chrome-yellow);
        }

        .h0u505-hero h1 {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--h0u505-text-main);
            letter-spacing: -1px;
            word-break: keep-all;
        }

        .h0u505-hero p {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--h0u505-text-sub);
            max-width: 700px;
            margin: 0 auto 40px;
        }

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

        .h0u505-btn {
            padding: 16px 32px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            min-width: 180px;
        }

        .h0u505-btn-primary {
            background: var(--h0u505-chrome-blue);
            color: var(--h0u505-white);
            box-shadow: 0 4px 14px rgba(66, 133, 244, 0.4);
        }

        .h0u505-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(66, 133, 244, 0.5);
        }

        .h0u505-btn-secondary {
            background: transparent;
            color: var(--h0u505-chrome-blue);
            border: 2px solid var(--h0u505-chrome-blue);
        }

        /* 故障排除步骤 */
        .h0u505-section {
            padding: 96px 0;
        }

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

        .h0u505-section-title h2 {
            font-size: clamp(1.75rem, 3vw + 0.5rem, 2.5rem);
            margin-bottom: 16px;
        }

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

        .h0u505-step-card {
            background: var(--h0u505-white);
            padding: 40px;
            border-radius: var(--h0u505-radius);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            border-bottom: 4px solid transparent;
        }

        .h0u505-step-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--h0u505-shadow);
            border-bottom-color: var(--h0u505-chrome-blue);
        }

        .h0u505-step-number {
            font-size: 48px;
            font-weight: 900;
            opacity: 0.1;
            position: absolute;
            top: 20px;
            right: 20px;
        }

        .h0u505-step-card h3 {
            font-size: 20px;
            margin-bottom: 16px;
            color: var(--h0u505-chrome-blue);
        }

        /* 安全矩阵区块 */
        .h0u505-matrix-section {
            background: #202124;
            color: #fff;
            padding: 96px 0;
            border-radius: 64px 64px 0 0;
        }

        .h0u505-matrix-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .h0u505-matrix-item {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            padding: 32px;
            border-radius: 24px;
            border: 1px solid rgba(255,255,255,0.1);
        }

        .h0u505-matrix-item h4 {
            color: var(--h0u505-chrome-green);
            margin-bottom: 12px;
            font-size: 18px;
        }

        .h0u505-matrix-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(52, 168, 83, 0.2);
            color: var(--h0u505-chrome-green);
            font-size: 12px;
            border-radius: 4px;
            margin-top: 16px;
            text-transform: uppercase;
        }

        /* 愿景里程碑 */
        .h0u505-vision-section {
            background: var(--h0u505-white);
            padding: 96px 0;
        }

        .h0u505-timeline {
            display: flex;
            flex-direction: column;
            gap: 40px;
            max-width: 800px;
            margin: 0 auto;
        }

        .h0u505-timeline-node {
            display: flex;
            gap: 32px;
            align-items: flex-start;
        }

        .h0u505-year {
            font-size: 24px;
            font-weight: 800;
            color: var(--h0u505-chrome-red);
            min-width: 80px;
        }

        .h0u505-focus {
            background: var(--h0u505-bg-light);
            padding: 24px;
            border-radius: 16px;
            flex-grow: 1;
        }

        /* 资讯动态区块标签 */
        .h0u505-news-section {
            padding: 80px 0;
            background: #f1f3f4;
        }

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

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

        .h0u505-footer-brand h5 {
            font-size: 20px;
            margin-bottom: 16px;
            color: var(--h0u505-text-main);
        }

        .h0u505-footer-links h6 {
            font-size: 14px;
            margin-bottom: 20px;
            color: var(--h0u505-text-main);
            text-transform: uppercase;
        }

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

        .h0u505-footer-links a {
            text-decoration: none;
            color: var(--h0u505-text-sub);
            font-size: 14px;
            display: block;
            margin-bottom: 12px;
            transition: color 0.3s;
        }

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

        .h0u505-copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid #f1f3f4;
            color: var(--h0u505-text-sub);
            font-size: 13px;
        }

        /* 文本溢出与换行 */
        p, h1, h2, h3, h4, h5, h6 {
            word-break: keep-all;
            overflow-wrap: break-word;
            white-space: normal;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .h0u505-navbar {
                height: auto;
                padding: 12px 0;
            }
            .h0u505-menu {
                justify-content: center;
                margin-top: 12px;
            }
            .h0u505-hero {
                padding: 120px 0 40px;
            }
            .h0u505-hero-card {
                padding: 24px;
                border-radius: 16px;
            }
            .h0u505-step-grid, .h0u505-matrix-grid {
                grid-template-columns: 1fr;
            }
            .h0u505-timeline-node {
                flex-direction: column;
                gap: 8px;
            }
        }