:root {
            --hjuo-primary: #1a73e8;
            --hjuo-danger: #ea4335;
            --hjuo-success: #34a853;
            --hjuo-warning: #fbbc04;
            --hjuo-dark: #202124;
            --hjuo-light: #f8f9fa;
            --hjuo-text: #3c4043;
            --hjuo-spacing: 8px;
            --hjuo-radius: 16px;
            --hjuo-container-width: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--hjuo-text);
            line-height: 1.6;
            background-color: #fff;
            overflow-x: hidden;
        }

        /* 导航系统 */
        .hjuo-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(15px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            padding: calc(var(--hjuo-spacing) * 2) 0;
        }

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

        .hjuo-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .hjuo-logo img {
            height: 40px;
            display: block;
        }

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

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

        .hjuo-nav-link {
            text-decoration: none;
            color: var(--hjuo-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
            word-break: keep-all;
        }

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

        .hjuo-nav-link.active {
            color: #fff;
            background: var(--hjuo-primary);
        }

        /* Hero 视觉区 - 独特盾牌布局 */
        .hjuo-hero {
            padding: 160px 0 80px;
            background: radial-gradient(circle at 10% 20%, rgba(26, 115, 232, 0.05) 0%, rgba(255, 255, 255, 1) 90%);
            position: relative;
            overflow: hidden;
        }

        .hjuo-hero-content {
            max-width: var(--hjuo-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .hjuo-hero-text {
            flex: 1 1 500px;
            min-width: 0;
            word-break: break-word;
        }

        .hjuo-hero-badge {
            display: inline-block;
            background: var(--hjuo-danger);
            color: #fff;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: bold;
            margin-bottom: 24px;
            box-shadow: 0 4px 15px rgba(234, 67, 53, 0.3);
        }

        .hjuo-hero-title {
            font-size: clamp(2.5rem, 5vw, 3.5rem);
            line-height: 1.1;
            color: var(--hjuo-dark);
            margin-bottom: 24px;
            font-weight: 800;
        }

        .hjuo-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            color: #5f6368;
            margin-bottom: 32px;
            max-width: 600px;
        }

        .hjuo-hero-visual {
            flex: 1 1 400px;
            min-width: 0;
            display: flex;
            justify-content: center;
            position: relative;
        }

        /* 纯CSS设计的动态安全盾 */
        .hjuo-shield-anim {
            width: 280px;
            height: 320px;
            background: linear-gradient(135deg, #1a73e8 0%, #0d47a1 100%);
            clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 20px 50px rgba(26, 115, 232, 0.4);
            transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

        .hjuo-shield-anim:hover {
            transform: scale(1.05) rotate(5deg);
        }

        .hjuo-shield-inner {
            color: #fff;
            font-size: 80px;
            font-weight: bold;
        }

        /* 引擎核心区块 */
        .hjuo-engine-section {
            padding: 96px 0;
            background: var(--hjuo-light);
        }

        .hjuo-section-header {
            max-width: var(--hjuo-container-width);
            margin: 0 auto 64px;
            padding: 0 24px;
            text-align: center;
        }

        .hjuo-section-title {
            font-size: 2.5rem;
            color: var(--hjuo-dark);
            margin-bottom: 16px;
        }

        .hjuo-grid {
            max-width: var(--hjuo-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .hjuo-card {
            background: #fff;
            padding: 40px;
            border-radius: var(--hjuo-radius);
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            transition: all 0.3s ease;
            min-width: 0;
            word-break: break-word;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .hjuo-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(26, 115, 232, 0.1);
            border-color: var(--hjuo-primary);
        }

        .hjuo-card-tag {
            color: var(--hjuo-primary);
            font-weight: 700;
            font-size: 14px;
            text-transform: uppercase;
            margin-bottom: 16px;
            display: block;
        }

        .hjuo-card-h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--hjuo-dark);
        }

        .hjuo-card-p {
            color: #5f6368;
            font-size: 1rem;
            line-height: 1.8;
        }

        /* 步骤流程区块 */
        .hjuo-flow-section {
            padding: 96px 0;
            background: #fff;
        }

        .hjuo-flow-container {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .hjuo-step {
            display: flex;
            flex-wrap: wrap;
            align-items: flex-start;
            gap: 32px;
            margin-bottom: 64px;
            position: relative;
        }

        .hjuo-step:not(:last-child)::after {
            content: '';
            position: absolute;
            left: 30px;
            top: 80px;
            bottom: -40px;
            width: 2px;
            background: linear-gradient(to bottom, var(--hjuo-primary), transparent);
        }

        .hjuo-step-number {
            width: 64px;
            height: 64px;
            background: var(--hjuo-primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: bold;
            flex-shrink: 0;
        }

        .hjuo-step-content {
            flex: 1 1 300px;
            min-width: 0;
            word-break: break-word;
        }

        .hjuo-step-title {
            font-size: 1.8rem;
            margin-bottom: 12px;
            color: var(--hjuo-dark);
        }

        /* 动态区块 */
        .hjuo-security-news {
            background: #202124;
            color: #fff;
            padding: 80px 0;
        }

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

        .hjuo-news-grid {
            max-width: var(--hjuo-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .hjuo-news-item {
            flex: 1 1 300px;
            background: rgba(255,255,255,0.05);
            padding: 24px;
            border-radius: 12px;
            min-width: 0;
        }

        /* 页脚 */
        .hjuo-footer {
            background: var(--hjuo-light);
            padding: 64px 0 32px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .hjuo-footer-content {
            max-width: var(--hjuo-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .hjuo-footer-brand {
            flex: 1 1 300px;
            min-width: 0;
        }

        .hjuo-footer-brand-name {
            font-size: 24px;
            font-weight: bold;
            color: var(--hjuo-dark);
            margin-bottom: 16px;
        }

        .hjuo-footer-links {
            flex: 2 1 500px;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            min-width: 0;
        }

        .hjuo-footer-group {
            min-width: 120px;
        }

        .hjuo-footer-h4 {
            font-size: 14px;
            text-transform: uppercase;
            color: #5f6368;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

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

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

        .hjuo-footer-link {
            text-decoration: none;
            color: #3c4043;
            font-size: 14px;
            transition: color 0.3s;
        }

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

        .hjuo-copyright {
            max-width: var(--hjuo-container-width);
            margin: 48px auto 0;
            padding: 24px 24px 0;
            border-top: 1px solid rgba(0,0,0,0.05);
            text-align: center;
            font-size: 12px;
            color: #70757a;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .hjuo-nav-menu {
                display: none; /* 简化移动端，实际应有汉堡菜单 */
            }
            .hjuo-hero-visual {
                order: -1;
            }
            .hjuo-hero {
                padding: 120px 0 60px;
                text-align: center;
            }
            .hjuo-hero-text {
                flex: 1 1 100%;
            }
            .hjuo-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .hjuo-step-number {
                width: 48px;
                height: 48px;
                font-size: 18px;
            }
            .hjuo-step:not(:last-child)::after {
                left: 23px;
            }
        }