:root {
            --hjuo-primary: #4285F4;
            --hjuo-secondary: #34A853;
            --hjuo-accent: #FBBC05;
            --hjuo-danger: #EA4335;
            --hjuo-text-main: #202124;
            --hjuo-text-light: #5f6368;
            --hjuo-bg-light: #f8f9fa;
            --hjuo-white: #ffffff;
            --hjuo-shadow: 0 4px 20px rgba(0,0,0,0.08);
            --hjuo-radius: 16px;
            --hjuo-max-width: 1100px;
        }

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

        body {
            font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            color: var(--hjuo-text-main);
            background-color: var(--hjuo-white);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏 */
        .hjuo-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

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

        .hjuo-logo {
            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-menu li a {
            text-decoration: none;
            color: var(--hjuo-text-light);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
        }

        .hjuo-nav-menu li a:hover {
            color: var(--hjuo-primary);
            background: rgba(66, 133, 244, 0.05);
        }

        .hjuo-nav-menu li a.active {
            color: var(--hjuo-primary);
            background: rgba(66, 133, 244, 0.1);
        }

        /* Hero 区块 - 独特居中卡片布局 */
        .hjuo-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at top right, rgba(66, 133, 244, 0.05), transparent),
                        radial-gradient(circle at bottom left, rgba(52, 168, 83, 0.05), transparent);
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            flex-wrap: wrap;
        }

        .hjuo-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(66, 133, 244, 0.1);
            color: var(--hjuo-primary);
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hjuo-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 3.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            max-width: 800px;
            word-break: break-word;
        }

        .hjuo-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--hjuo-text-light);
            max-width: 650px;
            margin-bottom: 48px;
            word-break: break-word;
        }

        /* 核心功能：模拟密码管理器的视觉卡片 */
        .hjuo-vault-card {
            width: 100%;
            max-width: 500px;
            background: var(--hjuo-white);
            border-radius: var(--hjuo-radius);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            padding: 32px;
            border: 1px solid rgba(0,0,0,0.05);
            position: relative;
            margin-bottom: 64px;
            min-width: 0;
        }

        .hjuo-vault-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 24px;
        }

        .hjuo-vault-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--hjuo-danger);
        }

        .hjuo-vault-dot:nth-child(2) { background: var(--hjuo-accent); }
        .hjuo-vault-dot:nth-child(3) { background: var(--hjuo-secondary); }

        .hjuo-vault-field {
            height: 48px;
            background: var(--hjuo-bg-light);
            border-radius: 8px;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            padding: 0 16px;
            color: #bdc1c6;
            font-family: monospace;
            border: 1px solid transparent;
            transition: border 0.3s;
        }

        .hjuo-vault-field:hover {
            border-color: var(--hjuo-primary);
        }

        /* 引擎技术展示 - Grid 布局 */
        .hjuo-section {
            padding: 80px 24px;
            max-width: var(--hjuo-max-width);
            margin: 0 auto;
        }

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

        .hjuo-feature-item {
            background: var(--hjuo-bg-light);
            padding: 40px;
            border-radius: var(--hjuo-radius);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            min-width: 0;
        }

        .hjuo-feature-item:hover {
            transform: translateY(-8px);
            box-shadow: var(--hjuo-shadow);
            background: var(--hjuo-white);
        }

        .hjuo-feature-name {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--hjuo-primary);
        }

        .hjuo-feature-logic {
            font-size: 1rem;
            color: var(--hjuo-text-light);
            margin-bottom: 16px;
            line-height: 1.7;
        }

        .hjuo-feature-benefit {
            display: inline-block;
            padding: 4px 12px;
            background: var(--hjuo-white);
            border: 1px solid var(--hjuo-primary);
            color: var(--hjuo-primary);
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* 用户流程 - Flex 布局 */
        .hjuo-flow-container {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 48px;
        }

        .hjuo-flow-step {
            flex: 1;
            min-width: 280px;
            padding: 32px;
            border-left: 4px solid var(--hjuo-primary);
            background: var(--hjuo-bg-light);
            border-radius: 0 12px 12px 0;
            transition: background 0.3s;
        }

        .hjuo-flow-step:hover {
            background: #eef4ff;
        }

        .hjuo-step-title {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 12px;
        }

        /* 动态内容标记区块 */
        .hjuo-dynamic-section {
            background: var(--hjuo-text-main);
            color: var(--hjuo-white);
            padding: 96px 24px;
            border-radius: 32px;
            margin: 40px auto;
            max-width: calc(var(--hjuo-max-width) + 100px);
        }

        .hjuo-dynamic-content-header {
            text-align: center;
            margin-bottom: 48px;
        }

        /* 按钮设计 */
        .hjuo-btn {
            display: inline-block;
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
        }

        .hjuo-btn-primary {
            background: var(--hjuo-primary);
            color: var(--hjuo-white);
            box-shadow: 0 8px 24px rgba(66, 133, 244, 0.3);
        }

        .hjuo-btn-primary:hover {
            transform: scale(1.05);
            box-shadow: 0 12px 32px rgba(66, 133, 244, 0.4);
        }

        /* 页脚 */
        .hjuo-footer {
            padding: 80px 24px;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
        }

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

        .hjuo-footer-copy {
            color: var(--hjuo-text-light);
            font-size: 0.9rem;
        }

        /* 响应式断点 */
        @media (max-width: 768px) {
            .hjuo-nav-menu {
                display: none; /* 简化演示，手机端可做成汉堡菜单 */
            }
            .hjuo-hero {
                padding-top: 120px;
            }
            .hjuo-grid {
                grid-template-columns: 1fr;
            }
            .hjuo-flow-step {
                min-width: 100%;
            }
        }