:root {
            --x393oe-primary: #0052cc;
            --x393oe-secondary: #00b8d9;
            --x393oe-accent: #ffab00;
            --x393oe-dark: #172b4d;
            --x393oe-light: #f4f5f7;
            --x393oe-white: #ffffff;
            --x393oe-text: #253858;
            --x393oe-spacing-unit: 8px;
            --x393oe-max-width: 1400px;
        }

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

        body {
            font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--x393oe-text);
            line-height: 1.6;
            background-color: var(--x393oe-white);
            overflow-x: hidden;
        }

        /* --- Navigation --- */
        .x393oe-nav-wrapper {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
        }

        .x393oe-nav-container {
            max-width: var(--x393oe-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: calc(var(--x393oe-spacing-unit) * 2);
        }

        .x393oe-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .x393oe-logo img {
            height: 40px;
            width: auto;
            display: block;
        }

        .x393oe-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: calc(var(--x393oe-spacing-unit) * 3);
            min-width: 0;
        }

        .x393oe-menu-item a {
            text-decoration: none;
            color: var(--x393oe-dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
            word-break: keep-all;
        }

        .x393oe-menu-item a:hover {
            color: var(--x393oe-primary);
        }

        .x393oe-menu-item.active a {
            color: var(--x393oe-primary);
            border-bottom: 2px solid var(--x393oe-primary);
        }

        /* --- Hero Section --- */
        .x393oe-hero {
            padding: 160px calc(var(--x393oe-spacing-unit) * 4) 80px;
            background: linear-gradient(135deg, #f0f7ff 0%, #ffffff 100%);
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 48px;
            max-width: 100%;
        }

        .x393oe-hero-content {
            flex: 1 1 500px;
            min-width: 0;
            max-width: 700px;
        }

        .x393oe-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--x393oe-dark);
            word-break: keep-all;
        }

        .x393oe-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: #44546f;
            margin-bottom: 32px;
            max-width: 600px;
        }

        .x393oe-hero-visual {
            flex: 1 1 400px;
            min-width: 0;
            position: relative;
        }

        .x393oe-hero-visual img {
            width: 100%;
            height: auto;
            border-radius: 24px;
            box-shadow: 0 30px 60px rgba(0, 82, 204, 0.15);
            transition: transform 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

        .x393oe-hero-visual img:hover {
            transform: translateY(-10px) rotate(1deg);
        }

        .x393oe-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .x393oe-btn-primary {
            background: var(--x393oe-primary);
            color: white;
            padding: 16px 40px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            box-shadow: 0 10px 20px rgba(0, 82, 204, 0.2);
            transition: all 0.3s;
        }

        .x393oe-btn-primary:hover {
            background: #0065ff;
            transform: translateY(-2px);
            box-shadow: 0 15px 30px rgba(0, 82, 204, 0.3);
        }

        /* --- Version List Section --- */
        .x393oe-versions {
            padding: 80px calc(var(--x393oe-spacing-unit) * 4);
            max-width: var(--x393oe-max-width);
            margin: 0 auto;
        }

        .x393oe-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .x393oe-section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            margin-bottom: 16px;
            color: var(--x393oe-dark);
        }

        .x393oe-version-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            align-items: start;
        }

        .x393oe-version-card {
            background: var(--x393oe-white);
            border: 1px solid #e1e4e8;
            border-radius: 16px;
            padding: 32px;
            transition: all 0.3s;
            position: relative;
            overflow: hidden;
        }

        .x393oe-version-card:hover {
            border-color: var(--x393oe-primary);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.05);
        }

        .x393oe-version-card h3 {
            margin-bottom: 16px;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .x393oe-version-tag {
            font-size: 0.75rem;
            background: #e3f2fd;
            color: var(--x393oe-primary);
            padding: 2px 8px;
            border-radius: 4px;
        }

        .x393oe-version-meta {
            font-size: 0.9rem;
            color: #6b778c;
            margin-bottom: 24px;
            border-bottom: 1px dashed #eee;
            padding-bottom: 16px;
        }

        .x393oe-download-list {
            list-style: none;
        }

        .x393oe-download-list li {
            margin-bottom: 12px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .x393oe-download-list a {
            color: var(--x393oe-primary);
            text-decoration: none;
            font-weight: 500;
        }

        /* --- Tech Pillars --- */
        .x393oe-tech-section {
            background: var(--x393oe-dark);
            color: var(--x393oe-white);
            padding: 96px calc(var(--x393oe-spacing-unit) * 4);
        }

        .x393oe-tech-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .x393oe-tech-card {
            flex: 1 1 300px;
            min-width: 0;
            background: rgba(255, 255, 255, 0.05);
            padding: 40px;
            border-radius: 20px;
            border-top: 4px solid var(--x393oe-secondary);
        }

        .x393oe-tech-card h4 {
            font-size: 1.25rem;
            margin-bottom: 16px;
            color: var(--x393oe-secondary);
        }

        .x393oe-tech-benefit {
            margin-top: 20px;
            font-size: 0.85rem;
            background: rgba(0, 184, 217, 0.15);
            padding: 8px 12px;
            border-radius: 4px;
            display: inline-block;
        }

        /* --- Install Guide --- */
        .x393oe-guide-section {
            padding: 96px calc(var(--x393oe-spacing-unit) * 4);
            max-width: var(--x393oe-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .x393oe-guide-image {
            flex: 1 1 450px;
            min-width: 0;
        }

        .x393oe-guide-image img {
            width: 100%;
            border-radius: 20px;
            box-shadow: 20px 20px 60px #d1d9e6, -20px -20px 60px #ffffff;
        }

        .x393oe-guide-steps {
            flex: 1 1 450px;
            min-width: 0;
        }

        .x393oe-step {
            display: flex;
            gap: 24px;
            margin-bottom: 32px;
        }

        .x393oe-step-num {
            flex: 0 0 48px;
            height: 48px;
            background: var(--x393oe-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.25rem;
        }

        .x393oe-step-content h5 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }

        /* --- FAQ Section --- */
        .x393oe-faq {
            padding: 80px calc(var(--x393oe-spacing-unit) * 4);
            background: #f9fbfd;
        }

        .x393oe-faq-container {
            max-width: 900px;
            margin: 0 auto;
        }

        .x393oe-faq-item {
            background: white;
            margin-bottom: 16px;
            border-radius: 12px;
            padding: 24px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.03);
        }

        .x393oe-faq-q {
            font-weight: 700;
            color: var(--x393oe-dark);
            margin-bottom: 12px;
            font-size: 1.1rem;
        }

        .x393oe-faq-a {
            color: #44546f;
        }

        /* --- Footer --- */
        .x393oe-footer {
            background: #091e42;
            color: #ebecf0;
            padding: 80px calc(var(--x393oe-spacing-unit) * 4) 40px;
        }

        .x393oe-footer-grid {
            max-width: var(--x393oe-max-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .x393oe-footer-brand h2 {
            color: white;
            margin-bottom: 24px;
        }

        .x393oe-footer-links h6 {
            color: white;
            font-size: 1.1rem;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .x393oe-footer-links ul {
            list-style: none;
        }

        .x393oe-footer-links li {
            margin-bottom: 12px;
        }

        .x393oe-footer-links a {
            color: #a5adba;
            text-decoration: none;
            transition: color 0.3s;
        }

        .x393oe-footer-links a:hover {
            color: var(--x393oe-secondary);
        }

        .x393oe-footer-bottom {
            max-width: var(--x393oe-max-width);
            margin: 0 auto;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 0.9rem;
            color: #7a869a;
        }

        /* --- Responsive --- */
        @media (max-width: 768px) {
            .x393oe-nav-container {
                flex-direction: column;
                gap: 16px;
            }
            .x393oe-menu {
                justify-content: center;
                gap: 12px;
            }
            .x393oe-hero {
                padding-top: 120px;
                text-align: center;
            }
            .x393oe-btn-group {
                justify-content: center;
            }
            .x393oe-hero-visual {
                order: -1;
            }
            .x393oe-version-grid {
                grid-template-columns: 1fr;
            }
        }