:root {
            --hjuo-primary: #4285F4;
            --hjuo-success: #34A853;
            --hjuo-warning: #FBBC05;
            --hjuo-danger: #EA4335;
            --hjuo-text-main: #202124;
            --hjuo-text-sub: #5f6368;
            --hjuo-bg-light: #f8f9fa;
            --hjuo-white: #ffffff;
            --hjuo-container-width: 1320px;
            --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, "Noto Sans SC", sans-serif;
            color: var(--hjuo-text-main);
            background-color: var(--hjuo-bg-light);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Typography */
        h1, h2, h3, h4 {
            line-height: 1.2;
            font-weight: 700;
            word-break: keep-all;
            white-space: normal;
        }

        p {
            line-height: 1.8;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* Layout Helpers */
        .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;
        }

        /* Navigation */
        .hjuo-navbar {
            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);
            transition: var(--hjuo-transition);
        }

        .hjuo-navbar-inner {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            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;
            flex-wrap: wrap;
        }

        .hjuo-nav-item a {
            text-decoration: none;
            color: var(--hjuo-text-sub);
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            transition: var(--hjuo-transition);
            display: block;
        }

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

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

        .hjuo-nav-item.active a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 3px;
            background: var(--hjuo-primary);
            border-radius: 2px;
        }

        /* Hero Section */
        .hjuo-hero {
            padding: 160px 0 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;
        }

        .hjuo-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            margin-bottom: 24px;
            background: linear-gradient(135deg, #4285F4, #34A853);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hjuo-hero-subtitle {
            font-size: clamp(1.1rem, 2vw + 0.5rem, 1.5rem);
            color: var(--hjuo-text-sub);
            max-width: 800px;
            margin: 0 auto 48px;
        }

        .hjuo-search-box {
            max-width: 680px;
            margin: 0 auto;
            position: relative;
            background: var(--hjuo-white);
            padding: 8px;
            border-radius: 50px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            display: flex;
            align-items: center;
        }

        .hjuo-search-input {
            flex: 1;
            border: none;
            padding: 12px 24px;
            font-size: 18px;
            outline: none;
            background: transparent;
            min-width: 0;
        }

        .hjuo-search-btn {
            background: var(--hjuo-primary);
            color: var(--hjuo-white);
            border: none;
            padding: 12px 32px;
            border-radius: 40px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--hjuo-transition);
        }

        .hjuo-search-btn:hover {
            box-shadow: 0 5px 15px rgba(66, 133, 244, 0.3);
            transform: translateY(-2px);
        }

        /* Bento Grid Section */
        .hjuo-section {
            padding: 96px 0;
        }

        .hjuo-section-header {
            margin-bottom: 48px;
            text-align: left;
        }

        .hjuo-section-title {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            margin-bottom: 16px;
        }

        .hjuo-bento-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .hjuo-bento-item {
            background: var(--hjuo-white);
            border-radius: 24px;
            padding: 32px;
            border: 1px solid rgba(0,0,0,0.03);
            transition: var(--hjuo-transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .hjuo-bento-item:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.06);
        }

        .hjuo-category-tag {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(66, 133, 244, 0.1);
            color: var(--hjuo-primary);
            border-radius: 6px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .hjuo-bento-item h3 {
            font-size: 20px;
            margin-bottom: 12px;
        }

        /* Engine Stats Section */
        .hjuo-engine-section {
            background: var(--hjuo-text-main);
            color: var(--hjuo-white);
            border-radius: 40px;
            margin: 40px 24px;
            padding: 80px 48px;
        }

        .hjuo-engine-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 48px;
        }

        .hjuo-engine-card {
            min-width: 0;
        }

        .hjuo-engine-name {
            color: var(--hjuo-primary);
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 16px;
            display: block;
        }

        .hjuo-engine-desc {
            font-size: 16px;
            opacity: 0.8;
            margin-bottom: 20px;
        }

        .hjuo-engine-spec {
            font-family: monospace;
            padding: 12px;
            background: rgba(255,255,255,0.05);
            border-radius: 8px;
            font-size: 13px;
        }

        /* User Flow Timeline */
        .hjuo-flow-container {
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            padding-left: 40px;
        }

        .hjuo-flow-container::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(to bottom, var(--hjuo-primary), var(--hjuo-success));
        }

        .hjuo-flow-step {
            position: relative;
            margin-bottom: 64px;
        }

        .hjuo-flow-step::after {
            content: '';
            position: absolute;
            left: -46px;
            top: 0;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--hjuo-white);
            border: 3px solid var(--hjuo-primary);
        }

        .hjuo-flow-title {
            font-size: 22px;
            margin-bottom: 8px;
        }

        /* Footer */
        .hjuo-footer {
            background: var(--hjuo-white);
            padding: 80px 0 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

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

        .hjuo-footer-brand h2 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--hjuo-primary);
        }

        .hjuo-footer-links h4 {
            margin-bottom: 24px;
            font-size: 16px;
        }

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

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

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

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

        .hjuo-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(0,0,0,0.05);
            color: var(--hjuo-text-sub);
            font-size: 14px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hjuo-footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .hjuo-navbar-inner {
                height: auto;
                padding: 16px 0;
            }
            .hjuo-nav-menu {
                width: 100%;
                justify-content: center;
                margin-top: 16px;
            }
            .hjuo-nav-item a {
                padding: 8px 10px;
                font-size: 13px;
            }
            .hjuo-hero {
                padding: 120px 0 60px;
            }
            .hjuo-footer-grid {
                grid-template-columns: 1fr;
            }
            .hjuo-engine-section {
                padding: 40px 24px;
                margin: 20px 12px;
            }
        }