:root {
            --hjuo-primary: #4285F4;
            --hjuo-success: #34A853;
            --hjuo-warning: #FBBC05;
            --hjuo-danger: #EA4335;
            --hjuo-text-dark: #202124;
            --hjuo-text-light: #5f6368;
            --hjuo-bg-soft: #f8f9fa;
            --hjuo-white: #ffffff;
            --hjuo-radius: 16px;
            --hjuo-container-width: 1100px;
            --hjuo-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--hjuo-white);
            color: var(--hjuo-text-dark);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏设计 */
        .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);
        }

        .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;
        }

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

        .hjuo-nav-menu {
            display: flex;
            list-style: none;
            gap: 8px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .hjuo-nav-item a {
            text-decoration: none;
            color: var(--hjuo-text-light);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 20px;
            transition: var(--hjuo-transition);
            display: block;
            white-space: nowrap;
        }

        .hjuo-nav-item a:hover {
            background: rgba(66, 133, 244, 0.08);
            color: var(--hjuo-primary);
        }

        .hjuo-nav-item a.hjuo-active {
            background: var(--hjuo-primary);
            color: var(--hjuo-white);
        }

        /* Hero 区域：独特垂直叠加布局 */
        .hjuo-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at 80% 20%, rgba(66, 133, 244, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 20% 80%, rgba(52, 168, 83, 0.05) 0%, transparent 40%);
            text-align: center;
            overflow: hidden;
        }

        .hjuo-hero-content {
            max-width: 800px;
            margin: 0 auto;
            word-break: break-word;
        }

        .hjuo-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #202124 0%, #4285F4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hjuo-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.4rem);
            color: var(--hjuo-text-light);
            margin-bottom: 48px;
            max-width: 650px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 核心下载卡片 */
        .hjuo-download-card {
            background: var(--hjuo-white);
            border-radius: 24px;
            padding: 40px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.08);
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            gap: 24px;
            border: 1px solid rgba(0,0,0,0.03);
            position: relative;
            z-index: 10;
        }

        .hjuo-btn-main {
            background: var(--hjuo-primary);
            color: var(--hjuo-white);
            padding: 18px 48px;
            border-radius: 100px;
            font-size: 18px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--hjuo-transition);
            box-shadow: 0 8px 20px rgba(66, 133, 244, 0.3);
            display: inline-block;
        }

        .hjuo-btn-main:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(66, 133, 244, 0.4);
            filter: brightness(1.1);
        }

        .hjuo-version-info {
            font-size: 14px;
            color: var(--hjuo-text-light);
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            justify-content: center;
        }

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

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

        .hjuo-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 700;
            margin-bottom: 16px;
        }

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

        .hjuo-engine-card {
            background: var(--hjuo-bg-soft);
            padding: 40px;
            border-radius: var(--hjuo-radius);
            transition: var(--hjuo-transition);
            border: 1px solid transparent;
            min-width: 0;
            position: relative;
            overflow: hidden;
        }

        .hjuo-engine-card:hover {
            background: var(--hjuo-white);
            border-color: var(--hjuo-primary);
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.05);
        }

        .hjuo-card-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(66, 133, 244, 0.1);
            color: var(--hjuo-primary);
            border-radius: 6px;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 20px;
            text-transform: uppercase;
        }

        .hjuo-engine-name {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--hjuo-text-dark);
        }

        .hjuo-engine-desc {
            font-size: 15px;
            color: var(--hjuo-text-light);
            margin-bottom: 20px;
        }

        .hjuo-engine-benefit {
            font-size: 14px;
            font-weight: 600;
            color: var(--hjuo-success);
            padding-top: 16px;
            border-top: 1px dashed rgba(0,0,0,0.1);
        }

        /* 用户路径区块 - 独特步骤布局 */
        .hjuo-steps-container {
            display: flex;
            flex-direction: column;
            gap: 24px;
            margin-top: 48px;
        }

        .hjuo-step-item {
            display: flex;
            align-items: center;
            background: var(--hjuo-white);
            border: 1px solid rgba(0,0,0,0.05);
            border-radius: 20px;
            padding: 32px;
            gap: 32px;
            transition: var(--hjuo-transition);
            min-width: 0;
            flex-wrap: wrap;
        }

        .hjuo-step-item:hover {
            border-color: var(--hjuo-success);
            box-shadow: 0 10px 25px rgba(0,0,0,0.03);
        }

        .hjuo-step-number {
            width: 56px;
            height: 56px;
            background: var(--hjuo-text-dark);
            color: var(--hjuo-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            flex-shrink: 0;
        }

        .hjuo-step-text {
            flex: 1;
            min-width: 240px;
        }

        .hjuo-step-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .hjuo-step-detail {
            color: var(--hjuo-text-light);
            font-size: 16px;
        }

        /* 动态资讯区块标记 */
        .hjuo-news-section {
            background: #fdfdfd;
        }

        /* 页脚设计 */
        .hjuo-footer {
            background: var(--hjuo-text-dark);
            color: rgba(255,255,255,0.7);
            padding: 80px 24px 40px;
        }

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

        .hjuo-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .hjuo-footer-logo-text {
            font-size: 24px;
            font-weight: 700;
            color: var(--hjuo-white);
            margin-bottom: 16px;
        }

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

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

        .hjuo-footer-list-title {
            color: var(--hjuo-white);
            font-weight: 600;
            margin-bottom: 20px;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

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

        .hjuo-footer-list a {
            color: rgba(255,255,255,0.5);
            text-decoration: none;
            font-size: 14px;
            transition: var(--hjuo-transition);
        }

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

        .hjuo-footer-bottom {
            max-width: var(--hjuo-container-width);
            margin: 64px auto 0;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.05);
            text-align: center;
            font-size: 13px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .hjuo-nav-container {
                height: auto;
                padding: 16px;
            }
            .hjuo-nav-menu {
                margin-top: 12px;
                justify-content: center;
                width: 100%;
            }
            .hjuo-hero {
                padding-top: 140px;
            }
            .hjuo-step-item {
                flex-direction: column;
                text-align: center;
                gap: 16px;
            }
            .hjuo-download-card {
                width: 100%;
                padding: 32px 20px;
            }
        }