:root {
            --hjuo-primary: #8ab4f8;
            --hjuo-bg: #0a0b10;
            --hjuo-surface: #17191e;
            --hjuo-text: #e8eaed;
            --hjuo-text-dim: #9aa0a6;
            --hjuo-accent: #d2e3fc;
            --hjuo-spacing-unit: 8px;
            --hjuo-container-width: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--hjuo-bg);
            color: var(--hjuo-text);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏 */
        .hjuo-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 11, 16, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .hjuo-nav-container {
            max-width: var(--hjuo-container-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .hjuo-logo {
            flex-shrink: 0;
            display: flex;
            align-items: center;
            min-width: 0;
        }

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

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

        .hjuo-nav-item a {
            text-decoration: none;
            color: var(--hjuo-text-dim);
            font-size: 14px;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .hjuo-nav-item a:hover {
            color: var(--hjuo-primary);
            background: rgba(138, 180, 248, 0.1);
        }

        .hjuo-nav-item a.hjuo-active {
            color: var(--hjuo-primary);
            font-weight: 600;
            background: rgba(138, 180, 248, 0.15);
        }

        /* Hero 区块 - 独特径向焦点布局 */
        .hjuo-hero {
            padding-top: 140px;
            padding-bottom: 96px;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .hjuo-hero::before {
            content: "";
            position: absolute;
            top: -20%;
            left: 50%;
            transform: translateX(-50%);
            width: 800px;
            height: 800px;
            background: radial-gradient(circle, rgba(138, 180, 248, 0.08) 0%, transparent 70%);
            z-index: -1;
        }

        .hjuo-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(138, 180, 248, 0.1);
            border: 1px solid rgba(138, 180, 248, 0.2);
            border-radius: 20px;
            color: var(--hjuo-primary);
            font-size: 13px;
            margin-bottom: 24px;
            letter-spacing: 1px;
        }

        .hjuo-hero-title {
            font-size: clamp(2.2rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            line-height: 1.2;
            max-width: 900px;
            margin-bottom: 24px;
            color: #fff;
            text-shadow: 0 4px 12px rgba(0,0,0,0.5);
        }

        .hjuo-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--hjuo-text-dim);
            max-width: 700px;
            margin-bottom: 48px;
            padding: 0 24px;
        }

        /* 隐身视觉组件 (SVG/CSS 代替图片) */
        .hjuo-stealth-visual {
            width: 100%;
            max-width: 800px;
            height: 300px;
            margin: 0 auto;
            position: relative;
            background: linear-gradient(180deg, var(--hjuo-surface) 0%, transparent 100%);
            border-radius: 24px 24px 0 0;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-bottom: none;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 -20px 40px rgba(0,0,0,0.3);
        }

        .hjuo-stealth-icon-box {
            width: 120px;
            height: 120px;
            background: #202124;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }

        .hjuo-stealth-icon-box svg {
            width: 64px;
            height: 64px;
            fill: var(--hjuo-text-dim);
        }

        /* 核心引擎架构 - Grid 布局 */
        .hjuo-section {
            padding: 96px 24px;
            max-width: var(--hjuo-container-width);
            margin: 0 auto;
        }

        .hjuo-grid-architecture {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .hjuo-card {
            background: var(--hjuo-surface);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: transform 0.3s ease, border-color 0.3s ease;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        .hjuo-card:hover {
            transform: translateY(-8px);
            border-color: var(--hjuo-primary);
        }

        .hjuo-card-tag {
            font-size: 12px;
            text-transform: uppercase;
            color: var(--hjuo-primary);
            margin-bottom: 16px;
            font-weight: bold;
        }

        .hjuo-card-title {
            font-size: 24px;
            margin-bottom: 16px;
            color: #fff;
        }

        .hjuo-card-desc {
            font-size: 15px;
            color: var(--hjuo-text-dim);
            margin-bottom: 24px;
        }

        .hjuo-card-feature {
            margin-top: auto;
            font-size: 13px;
            background: rgba(255, 255, 255, 0.03);
            padding: 12px;
            border-radius: 8px;
            color: var(--hjuo-accent);
        }

        /* 交互流程区块 - 左右交叉分栏布局 */
        .hjuo-process-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 80px;
        }

        .hjuo-process-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .hjuo-process-content {
            flex: 1;
            min-width: 300px;
        }

        .hjuo-process-visual {
            flex: 1;
            min-width: 300px;
            background: rgba(138, 180, 248, 0.03);
            aspect-ratio: 16/9;
            border-radius: 12px;
            border: 1px dashed rgba(138, 180, 248, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--hjuo-text-dim);
            position: relative;
        }

        .hjuo-step-num {
            font-size: 64px;
            font-weight: 900;
            color: rgba(138, 180, 248, 0.1);
            position: absolute;
            top: -20px;
            left: -10px;
        }

        .hjuo-process-title {
            font-size: 32px;
            margin-bottom: 16px;
            color: #fff;
        }

        .hjuo-process-detail {
            font-size: 18px;
            color: var(--hjuo-text-dim);
        }

        /* 页脚 */
        .hjuo-footer {
            background: #000;
            padding: 64px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

        .hjuo-footer-inner {
            max-width: var(--hjuo-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .hjuo-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .hjuo-footer-brand-name {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            color: #fff;
        }

        .hjuo-footer-slogan {
            font-size: 14px;
            color: var(--hjuo-text-dim);
            max-width: 300px;
        }

        .hjuo-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
        }

        .hjuo-footer-group h4 {
            font-size: 14px;
            margin-bottom: 20px;
            color: #fff;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

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

        .hjuo-footer-group li {
            margin-bottom: 10px;
        }

        .hjuo-footer-group a {
            color: var(--hjuo-text-dim);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .hjuo-copyright {
            width: 100%;
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 12px;
            color: #5f6368;
            text-align: center;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .hjuo-nav-container {
                height: auto;
                padding: 16px;
            }
            .hjuo-nav-menu {
                margin-top: 16px;
                width: 100%;
                justify-content: center;
                gap: 8px;
            }
            .hjuo-hero {
                padding-top: 180px;
            }
            .hjuo-process-row, .hjuo-process-row:nth-child(even) {
                flex-direction: column;
                text-align: center;
            }
        }

        /* SEO 隐藏结构化数据 */
        .hjuo-seo-hidden {
            display: none;
        }