:root {
            --hjuo-primary: #4285F4;
            --hjuo-success: #34A853;
            --hjuo-warning: #FBBC05;
            --hjuo-danger: #EA4335;
            --hjuo-dark: #202124;
            --hjuo-light: #F8F9FA;
            --hjuo-text: #3C4043;
            --hjuo-white: #FFFFFF;
            --hjuo-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
            --hjuo-container-width: 1100px;
        }

        * {
            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(--hjuo-text);
            background-color: var(--hjuo-white);
            line-height: 1.65;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局基础 */
        .hjuo-container {
            max-width: var(--hjuo-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

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

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

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

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

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

        .hjuo-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
        }

        .hjuo-menu-link {
            text-decoration: none;
            color: var(--hjuo-text);
            font-size: 15px;
            font-weight: 500;
            transition: var(--hjuo-transition);
            padding: 8px 0;
            position: relative;
        }

        .hjuo-menu-link:hover {
            color: var(--hjuo-primary);
        }

        .hjuo-menu-link.hjuo-active {
            color: var(--hjuo-primary);
        }

        .hjuo-menu-link.hjuo-active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--hjuo-primary);
            border-radius: 2px;
        }

        /* Hero 区 - 独特卡片悬浮结构 */
        .hjuo-hero {
            padding: 160px 0 96px;
            background: radial-gradient(circle at 10% 20%, rgba(66, 133, 244, 0.05) 0%, rgba(255, 255, 255, 0) 50%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hjuo-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(66, 133, 244, 0.1);
            color: var(--hjuo-primary);
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hjuo-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            color: var(--hjuo-dark);
            margin-bottom: 24px;
            word-break: break-word;
        }

        .hjuo-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            max-width: 700px;
            margin: 0 auto 48px;
            color: #5F6368;
        }

        /* 引擎模块 - Grid 异形布局 */
        .hjuo-engine-section {
            padding: 96px 0;
            background-color: var(--hjuo-light);
        }

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

        .hjuo-section-title {
            font-size: clamp(1.5rem, 3vw + 0.5rem, 2.5rem);
            margin-bottom: 16px;
            color: var(--hjuo-dark);
        }

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

        .hjuo-engine-card {
            background: var(--hjuo-white);
            padding: 48px 32px;
            border-radius: 24px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
            transition: var(--hjuo-transition);
            border: 1px solid rgba(0,0,0,0.02);
            position: relative;
            overflow: hidden;
        }

        .hjuo-engine-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

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

        .hjuo-engine-card:hover::before {
            opacity: 1;
        }

        .hjuo-module-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--hjuo-primary);
        }

        .hjuo-technical-logic {
            font-size: 16px;
            color: #5F6368;
            margin-bottom: 24px;
            word-break: break-word;
        }

        .hjuo-benefit-tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 12px;
            background: #E8F0FE;
            color: var(--hjuo-primary);
            border-radius: 4px;
            font-size: 13px;
            font-weight: 500;
        }

        /* 流程区块 - 交错布局 */
        .hjuo-flow-section {
            padding: 128px 0;
        }

        .hjuo-flow-item {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
        }

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

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

        .hjuo-flow-visual {
            flex: 1;
            min-width: 300px;
            height: 400px;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            border-radius: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: inset 0 0 50px rgba(255,255,255,0.5);
            position: relative;
        }

        .hjuo-flow-visual img {
            max-width: 80%;
            height: auto;
            filter: drop-shadow(0 20px 30px rgba(0,0,0,0.1));
        }

        .hjuo-step-number {
            font-size: 64px;
            font-weight: 900;
            color: rgba(66, 133, 244, 0.1);
            line-height: 1;
            margin-bottom: 8px;
        }

        .hjuo-step-title {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--hjuo-dark);
        }

        .hjuo-step-detail {
            font-size: 18px;
            color: #5F6368;
            line-height: 1.8;
            word-break: break-word;
        }

        /* 底部 */
        .hjuo-footer {
            background: var(--hjuo-dark);
            color: #9AA0A6;
            padding: 80px 0 40px;
        }

        .hjuo-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 64px;
        }

        .hjuo-footer-brand-name {
            font-size: 24px;
            font-weight: 700;
            color: var(--hjuo-white);
            margin-bottom: 24px;
        }

        .hjuo-footer-slogan {
            font-size: 16px;
            max-width: 300px;
            line-height: 1.6;
        }

        .hjuo-footer-links h4 {
            color: var(--hjuo-white);
            margin-bottom: 24px;
            font-size: 16px;
        }

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

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

        .hjuo-footer-links a {
            color: #9AA0A6;
            text-decoration: none;
            transition: var(--hjuo-transition);
        }

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

        .hjuo-copyright {
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .hjuo-menu {
                display: none; /* 简化处理，实际开发可增加汉堡菜单 */
            }
            .hjuo-hero-title {
                font-size: 2.5rem;
            }
            .hjuo-flow-item {
                flex-direction: column !important;
                gap: 32px;
            }
            .hjuo-flow-visual {
                height: 250px;
                width: 100%;
            }
            .hjuo-footer-grid {
                grid-template-columns: 1fr;
            }
        }