/* 基础变量与复位 */
        :root {
            --hjuo-bg: #050505;
            --hjuo-surface: #111111;
            --hjuo-accent: #4285f4;
            --hjuo-accent-glow: rgba(66, 133, 244, 0.3);
            --hjuo-text-main: #ffffff;
            --hjuo-text-mute: #a0a0a0;
            --hjuo-border: rgba(255, 255, 255, 0.1);
            --hjuo-radius: 16px;
            --hjuo-spacing: 8px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-font-smoothing: antialiased;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--hjuo-bg);
            color: var(--hjuo-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* 布局容器 */
        .hjuo-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 calc(var(--hjuo-spacing) * 3);
            width: 100%;
        }

        /* 导航系统 */
        .hjuo-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(5, 5, 5, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--hjuo-border);
        }

        .hjuo-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            height: 80px;
            min-width: 0;
        }

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

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

        .hjuo-nav-list {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--hjuo-spacing) * 3);
            min-width: 0;
        }

        .hjuo-nav-item a {
            text-decoration: none;
            color: var(--hjuo-text-mute);
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        .hjuo-nav-item a:hover {
            color: var(--hjuo-accent);
        }

        .hjuo-nav-item.hjuo-active a {
            color: var(--hjuo-text-main);
            position: relative;
        }

        .hjuo-nav-item.hjuo-active a::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--hjuo-accent);
            box-shadow: 0 0 10px var(--hjuo-accent);
        }

        /* Hero 视觉区 - 采用对角线分割感设计 */
        .hjuo-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            position: relative;
            overflow: hidden;
        }

        .hjuo-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            min-width: 0;
        }

        .hjuo-hero-text {
            flex: 1;
            min-width: 320px;
            z-index: 2;
        }

        .hjuo-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(66, 133, 244, 0.1);
            border: 1px solid var(--hjuo-accent);
            color: var(--hjuo-accent);
            border-radius: 100px;
            font-size: 0.85rem;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .hjuo-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(135deg, #fff 0%, #888 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hjuo-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--hjuo-text-mute);
            max-width: 600px;
            margin-bottom: 40px;
        }

        .hjuo-hero-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
            display: flex;
            justify-content: center;
        }

        /* 纯CSS设计的暗黑模式示意图，替代图片 */
        .hjuo-browser-mockup {
            width: 100%;
            max-width: 500px;
            aspect-ratio: 16/10;
            background: #1a1a1a;
            border-radius: 12px;
            border: 1px solid rgba(255,255,255,0.1);
            box-shadow: 0 40px 100px rgba(0,0,0,0.5), 0 0 20px var(--hjuo-accent-glow);
            padding: 12px;
            position: relative;
        }

        .hjuo-mockup-header {
            height: 20px;
            display: flex;
            gap: 6px;
            margin-bottom: 12px;
        }

        .hjuo-dot { width: 8px; height: 8px; border-radius: 50%; background: #333; }
        .hjuo-mockup-content {
            height: calc(100% - 32px);
            background: #0a0a0a;
            border-radius: 4px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            padding: 20px;
        }

        .hjuo-skeleton { background: #1a1a1a; border-radius: 4px; }
        .hjuo-sk-1 { width: 60%; height: 20px; background: linear-gradient(90deg, #1a1a1a, #2a2a2a, #1a1a1a); }
        .hjuo-sk-2 { width: 90%; height: 12px; }
        .hjuo-sk-3 { width: 80%; height: 12px; }

        /* 技术模块 Grid */
        .hjuo-section {
            padding: 96px 0;
        }

        .hjuo-section-title {
            text-align: center;
            font-size: clamp(2rem, 3vw + 0.5rem, 2.8rem);
            margin-bottom: 64px;
        }

        .hjuo-engine-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .hjuo-card {
            background: var(--hjuo-surface);
            padding: 48px;
            border-radius: var(--hjuo-radius);
            border: 1px solid var(--hjuo-border);
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            min-width: 0;
            position: relative;
            overflow: hidden;
        }

        .hjuo-card:hover {
            transform: translateY(-12px);
            border-color: var(--hjuo-accent);
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
        }

        .hjuo-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--hjuo-accent);
            opacity: 0;
            transition: opacity 0.3s;
        }

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

        .hjuo-card-icon {
            font-size: 2.5rem;
            margin-bottom: 24px;
            display: block;
        }

        .hjuo-card-title {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: #fff;
        }

        .hjuo-card-text {
            color: var(--hjuo-text-mute);
            font-size: 1rem;
            line-height: 1.7;
        }

        .hjuo-benefit-tag {
            margin-top: 20px;
            display: inline-block;
            font-size: 0.85rem;
            color: #4caf50;
            font-weight: 600;
        }

        /* 流程步骤 - 横向交替布局 */
        .hjuo-flow-container {
            display: flex;
            flex-direction: column;
            gap: 64px;
            margin-top: 48px;
        }

        .hjuo-flow-item {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
            min-width: 0;
        }

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

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

        .hjuo-flow-step-num {
            font-size: 4rem;
            font-weight: 900;
            opacity: 0.1;
            line-height: 1;
            margin-bottom: -20px;
            font-family: serif;
        }

        .hjuo-flow-title {
            font-size: 2rem;
            margin-bottom: 16px;
        }

        .hjuo-flow-detail {
            color: var(--hjuo-text-mute);
            font-size: 1.1rem;
        }

        /* 按钮设计 */
        .hjuo-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .hjuo-btn {
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s ease;
            display: inline-block;
            text-align: center;
        }

        .hjuo-btn-primary {
            background: var(--hjuo-accent);
            color: #fff;
            box-shadow: 0 10px 20px var(--hjuo-accent-glow);
        }

        .hjuo-btn-primary:hover {
            transform: scale(1.05);
            box-shadow: 0 15px 30px var(--hjuo-accent-glow);
        }

        .hjuo-btn-secondary {
            background: transparent;
            color: #fff;
            border: 1px solid var(--hjuo-border);
        }

        .hjuo-btn-secondary:hover {
            background: rgba(255,255,255,0.05);
            border-color: #fff;
        }

        /* 页脚 */
        .hjuo-footer {
            padding: 80px 0 40px;
            border-top: 1px solid var(--hjuo-border);
            margin-top: 64px;
        }

        .hjuo-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .hjuo-footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 24px;
            color: var(--hjuo-accent);
        }

        .hjuo-footer-link-group h4 {
            margin-bottom: 20px;
            font-size: 1rem;
            color: #fff;
        }

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

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

        .hjuo-footer-link-group a {
            color: var(--hjuo-text-mute);
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.3s;
        }

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

        .hjuo-copyright {
            text-align: center;
            color: #555;
            font-size: 0.85rem;
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 40px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .hjuo-nav-list {
                display: none; /* 简化移动端，实际项目中应有汉堡菜单 */
            }
            .hjuo-hero {
                padding-top: 120px;
                text-align: center;
            }
            .hjuo-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .hjuo-cta-group {
                justify-content: center;
            }
            .hjuo-flow-item {
                text-align: center;
            }
        }