:root {
            --hjuo-primary: #1a73e8;
            --hjuo-secondary: #202124;
            --hjuo-accent: #34a853;
            --hjuo-bg-light: #f8f9fa;
            --hjuo-text-main: #3c4043;
            --hjuo-text-dark: #202124;
            --hjuo-white: #ffffff;
            --hjuo-border: #dadce0;
            --hjuo-code-green: #00c853;
            --hjuo-code-blue: #40c4ff;
            --hjuo-spacing-unit: 8px;
            --hjuo-max-width: 1400px;
        }

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

        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--hjuo-bg-light);
            color: var(--hjuo-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            background-image: radial-gradient(rgba(0,0,0,0.05) 1px, transparent 0);
            background-size: 32px 32px;
        }

        /* 布局基础 */
        .hjuo-container {
            max-width: var(--hjuo-max-width);
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }

        .hjuo-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .hjuo-flex-item {
            min-width: 0;
        }

        /* 导航栏 */
        .hjuo-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--hjuo-border);
            z-index: 1000;
            transition: box-shadow 0.3s ease;
        }

        .hjuo-header:hover {
            box-shadow: 0 4px 20px rgba(0,0,0,0.08);
        }

        .hjuo-nav-container {
            height: 72px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

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

        .hjuo-logo img {
            height: 36px;
            width: auto;
            display: block;
        }

        .hjuo-nav-menu {
            display: flex;
            list-style: none;
            gap: 16px;
        }

        .hjuo-nav-link {
            text-decoration: none;
            color: var(--hjuo-text-main);
            font-size: clamp(0.85rem, 1vw + 0.2rem, 1rem);
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .hjuo-nav-link:hover {
            background: rgba(26, 115, 232, 0.08);
            color: var(--hjuo-primary);
        }

        .hjuo-nav-link.active {
            color: var(--hjuo-primary);
            background: rgba(26, 115, 232, 0.12);
        }

        /* Hero 区块 - 独特代码审查风格 */
        .hjuo-hero {
            padding: 160px 0 96px;
            background: linear-gradient(135deg, #ffffff 0%, #f1f3f4 100%);
            border-bottom: 1px solid var(--hjuo-border);
        }

        .hjuo-hero-content {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }

        .hjuo-badge {
            display: inline-block;
            background: var(--hjuo-secondary);
            color: var(--hjuo-white);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-bottom: 24px;
            letter-spacing: 1px;
            text-transform: uppercase;
        }

        .hjuo-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            color: var(--hjuo-text-dark);
            line-height: 1.1;
            margin-bottom: 24px;
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        .hjuo-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--hjuo-text-main);
            max-width: 700px;
            margin: 0 auto 40px;
            word-break: break-word;
        }

        /* 技术架构区块 - Grid 布局 */
        .hjuo-section-engine {
            padding: 96px 0;
            background: var(--hjuo-white);
        }

        .hjuo-grid-engine {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .hjuo-engine-card {
            background: var(--hjuo-bg-light);
            border: 1px solid var(--hjuo-border);
            border-radius: 16px;
            padding: 40px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
            min-width: 0;
        }

        .hjuo-engine-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 32px rgba(0,0,0,0.1);
            border-color: var(--hjuo-primary);
        }

        .hjuo-engine-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--hjuo-primary);
        }

        .hjuo-engine-name {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--hjuo-text-dark);
            margin-bottom: 16px;
        }

        .hjuo-engine-logic {
            font-size: 1rem;
            color: var(--hjuo-text-main);
            margin-bottom: 24px;
            word-break: break-word;
        }

        .hjuo-engine-tech {
            font-family: 'Courier New', Courier, monospace;
            background: #e8eaed;
            padding: 12px;
            border-radius: 8px;
            font-size: 0.9rem;
            color: var(--hjuo-secondary);
        }

        /* 交互流程区块 */
        .hjuo-section-flow {
            padding: 96px 0;
            background: var(--hjuo-secondary);
            color: var(--hjuo-white);
        }

        .hjuo-flow-container {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            justify-content: center;
        }

        .hjuo-flow-item {
            flex: 1;
            min-width: 300px;
            position: relative;
        }

        .hjuo-flow-step {
            font-size: 4rem;
            font-weight: 900;
            color: rgba(255,255,255,0.1);
            position: absolute;
            top: -20px;
            left: 0;
        }

        .hjuo-flow-content {
            position: relative;
            z-index: 1;
            padding-top: 20px;
        }

        .hjuo-flow-title {
            font-size: 1.4rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--hjuo-primary);
        }

        .hjuo-flow-detail {
            font-size: 1rem;
            opacity: 0.8;
            line-height: 1.8;
            word-break: break-word;
        }

        /* 底部 */
        .hjuo-footer {
            background: var(--hjuo-white);
            border-top: 1px solid var(--hjuo-border);
            padding: 64px 0 32px;
        }

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

        .hjuo-footer-brand {
            flex: 2;
            min-width: 300px;
        }

        .hjuo-footer-brand-name {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--hjuo-text-dark);
            margin-bottom: 16px;
        }

        .hjuo-footer-links {
            flex: 3;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 24px;
        }

        .hjuo-footer-column h4 {
            margin-bottom: 16px;
            font-size: 1rem;
            color: var(--hjuo-text-dark);
        }

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

        .hjuo-footer-column li {
            margin-bottom: 8px;
        }

        .hjuo-footer-column a {
            text-decoration: none;
            color: var(--hjuo-text-main);
            font-size: 0.9rem;
            transition: color 0.2s;
        }

        .hjuo-footer-column a:hover {
            color: var(--hjuo-primary);
        }

        .hjuo-copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid var(--hjuo-border);
            font-size: 0.85rem;
            color: #70757a;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .hjuo-nav-menu {
                display: none; /* 简化演示：移动端隐藏菜单或转为汉堡菜单 */
            }
            .hjuo-hero {
                padding: 120px 0 64px;
            }
            .hjuo-hero-title {
                font-size: 2.5rem;
            }
            .hjuo-grid-engine {
                grid-template-columns: 1fr;
            }
            .hjuo-container {
                padding: 0 20px;
            }
        }

        /* 按钮样式 */
        .hjuo-btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .hjuo-btn-primary {
            background: var(--hjuo-primary);
            color: var(--hjuo-white);
            box-shadow: 0 4px 14px rgba(26, 115, 232, 0.4);
        }

        .hjuo-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 115, 232, 0.6);
            background: #1765cc;
        }