:root {
            --su4j14-primary: #ff8c00;
            --su4j14-primary-hover: #e67e00;
            --su4j14-dark: #1a1a1a;
            --su4j14-light: #f4f7f6;
            --su4j14-white: #ffffff;
            --su4j14-text: #333333;
            --su4j14-text-muted: #666666;
            --su4j14-border: #e0e0e0;
            --su4j14-success: #28a745;
            --su4j14-font-main: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --su4j14-spacing-unit: 8px;
        }

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

        body {
            font-family: var(--su4j14-font-main);
            line-height: 1.6;
            color: var(--su4j14-text);
            background-color: var(--su4j14-white);
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        /* 导航栏 */
        .su4j14-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--su4j14-border);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .su4j14-nav-container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            flex-wrap: wrap;
        }

        .su4j14-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .su4j14-logo img {
            height: 32px;
            width: auto;
        }

        .su4j14-nav-menu {
            display: flex;
            list-style: none;
            gap: 24px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .su4j14-nav-menu li a {
            text-decoration: none;
            color: var(--su4j14-text);
            font-weight: 500;
            font-size: 14px;
            transition: color 0.3s;
        }

        .su4j14-nav-menu li a:hover {
            color: var(--su4j14-primary);
        }

        .su4j14-nav-menu li a.su4j14-active {
            color: var(--su4j14-primary);
            border-bottom: 2px solid var(--su4j14-primary);
            padding-bottom: 4px;
        }

        /* Hero 区块 */
        .su4j14-hero {
            padding: 160px 24px 96px;
            background: radial-gradient(circle at top right, #fff5e6 0%, #ffffff 50%);
            text-align: center;
        }

        .su4j14-hero-content {
            max-width: 900px;
            margin: 0 auto;
        }

        .su4j14-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 140, 0, 0.1);
            color: var(--su4j14-primary);
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .su4j14-hero h1 {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            color: var(--su4j14-dark);
            margin-bottom: 24px;
        }

        .su4j14-hero p {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--su4j14-text-muted);
            margin-bottom: 48px;
            max-width: 750px;
            margin-left: auto;
            margin-right: auto;
        }

        .su4j14-download-box {
            background: var(--su4j14-white);
            padding: 40px;
            border-radius: 24px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            gap: 16px;
            border: 1px solid var(--su4j14-border);
        }

        .su4j14-btn-primary {
            background: linear-gradient(135deg, var(--su4j14-primary) 0%, #ff6a00 100%);
            color: white;
            padding: 18px 48px;
            border-radius: 12px;
            text-decoration: none;
            font-size: 18px;
            font-weight: bold;
            transition: transform 0.3s, box-shadow 0.3s;
            box-shadow: 0 10px 20px rgba(255, 140, 0, 0.3);
        }

        .su4j14-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(255, 140, 0, 0.4);
        }

        .su4j14-meta-info {
            font-size: 13px;
            color: var(--su4j14-text-muted);
        }

        /* 核心技术区块 */
        .su4j14-section {
            padding: 96px 24px;
            max-width: 1320px;
            margin: 0 auto;
        }

        .su4j14-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .su4j14-section-title h2 {
            font-size: clamp(1.75rem, 4vw, 2.5rem);
            margin-bottom: 16px;
        }

        .su4j14-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .su4j14-tech-card {
            background: var(--su4j14-light);
            padding: 40px;
            border-radius: 20px;
            transition: background 0.3s, transform 0.3s;
            border: 1px solid transparent;
            min-width: 0;
        }

        .su4j14-tech-card:hover {
            background: var(--su4j14-white);
            border-color: var(--su4j14-primary);
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

        .su4j14-tech-card h3 {
            font-size: 20px;
            margin-bottom: 16px;
            color: var(--su4j14-primary);
        }

        .su4j14-tech-card p {
            margin-bottom: 24px;
            color: var(--su4j14-text);
        }

        .su4j14-benefit {
            font-weight: 600;
            font-size: 14px;
            color: var(--su4j14-success);
            padding-top: 16px;
            border-top: 1px dashed var(--su4j14-border);
        }

        /* 工作流程 */
        .su4j14-workflow-container {
            background: var(--su4j14-dark);
            color: white;
            padding: 96px 24px;
            border-radius: 40px;
            margin: 0 24px;
        }

        .su4j14-workflow-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            justify-content: center;
        }

        .su4j14-workflow-item {
            flex: 1;
            min-width: 280px;
            position: relative;
        }

        .su4j14-step-num {
            font-size: 64px;
            font-weight: 800;
            opacity: 0.2;
            line-height: 1;
            margin-bottom: -20px;
        }

        .su4j14-workflow-item h3 {
            font-size: 24px;
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }

        .su4j14-workflow-item p {
            color: #cccccc;
        }

        /* 版本对比 */
        .su4j14-tier-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .su4j14-tier-card {
            padding: 48px 32px;
            border: 1px solid var(--su4j14-border);
            border-radius: 20px;
            text-align: center;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .su4j14-tier-card.su4j14-featured {
            background: var(--su4j14-dark);
            color: white;
            border: none;
            transform: scale(1.05);
        }

        .su4j14-tier-card h3 {
            font-size: 24px;
            margin-bottom: 24px;
        }

        .su4j14-feature-list {
            list-style: none;
            text-align: left;
            margin-bottom: 32px;
            flex-grow: 1;
        }

        .su4j14-feature-list li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            font-size: 15px;
        }

        .su4j14-featured .su4j14-feature-list li {
            border-bottom-color: rgba(255,255,255,0.1);
        }

        .su4j14-btn-outline {
            border: 2px solid var(--su4j14-primary);
            color: var(--su4j14-primary);
            padding: 12px 24px;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
        }

        .su4j14-btn-outline:hover {
            background: var(--su4j14-primary);
            color: white;
        }

        .su4j14-featured .su4j14-btn-outline {
            background: var(--su4j14-primary);
            color: white;
            border: none;
        }

        /* 页脚 */
        .su4j14-footer {
            background: #f8f9fa;
            padding: 80px 24px 40px;
            border-top: 1px solid var(--su4j14-border);
        }

        .su4j14-footer-content {
            max-width: 1320px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .su4j14-footer-brand {
            flex: 1;
            min-width: 250px;
        }

        .su4j14-footer-brand h2 {
            font-size: 28px;
            color: var(--su4j14-primary);
            margin-bottom: 16px;
        }

        .su4j14-footer-links {
            display: flex;
            gap: 64px;
            flex-wrap: wrap;
        }

        .su4j14-footer-column h4 {
            margin-bottom: 20px;
            font-size: 16px;
        }

        .su4j14-footer-column ul {
            list-style: none;
        }

        .su4j14-footer-column ul li {
            margin-bottom: 12px;
        }

        .su4j14-footer-column ul li a {
            text-decoration: none;
            color: var(--su4j14-text-muted);
            font-size: 14px;
            transition: color 0.3s;
        }

        .su4j14-footer-column ul li a:hover {
            color: var(--su4j14-primary);
        }

        .su4j14-copyright {
            max-width: 1320px;
            margin: 48px auto 0;
            padding-top: 24px;
            border-top: 1px solid var(--su4j14-border);
            text-align: center;
            font-size: 14px;
            color: var(--su4j14-text-muted);
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .su4j14-tier-card.su4j14-featured {
                transform: scale(1);
            }
        }

        @media (max-width: 768px) {
            .su4j14-nav-container {
                height: auto;
                padding: 16px;
            }
            .su4j14-nav-menu {
                margin-top: 16px;
                gap: 12px;
                justify-content: center;
            }
            .su4j14-hero {
                padding: 140px 24px 64px;
            }
            .su4j14-download-box {
                padding: 24px;
                width: 100%;
            }
            .su4j14-workflow-container {
                margin: 0;
                border-radius: 0;
            }
        }