:root {
            --su4j14-primary: #ff8c00;
            --su4j14-primary-dark: #e67e00;
            --su4j14-secondary: #2c3e50;
            --su4j14-bg-light: #f4f7f6;
            --su4j14-text-dark: #1a1a1a;
            --su4j14-text-muted: #666;
            --su4j14-white: #ffffff;
            --su4j14-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --su4j14-radius: 16px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--su4j14-bg-light);
            color: var(--su4j14-text-dark);
            line-height: 1.8;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局容器 */
        .su4j14-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .su4j14-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
            padding: 16px 0;
        }

        .su4j14-nav-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

        .su4j14-logo {
            flex-shrink: 0;
            min-width: 0;
        }

        .su4j14-logo img {
            height: 32px;
            display: block;
        }

        .su4j14-nav-links {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 20px;
            min-width: 0;
        }

        .su4j14-nav-links a {
            text-decoration: none;
            color: var(--su4j14-text-dark);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s;
            padding: 4px 8px;
        }

        .su4j14-nav-links a:hover, .su4j14-nav-links a.active {
            color: var(--su4j14-primary);
        }

        /* Hero 区块 - 独特非对称布局 */
        .su4j14-hero {
            padding: 160px 0 80px;
            background: linear-gradient(135deg, #ffffff 0%, #f0f4f8 100%);
            position: relative;
            overflow: hidden;
        }

        .su4j14-hero::before {
            content: '';
            position: absolute;
            top: -100px;
            right: -100px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255,140,0,0.1) 0%, transparent 70%);
            border-radius: 50%;
        }

        .su4j14-hero-content {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .su4j14-hero-text {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .su4j14-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--su4j14-secondary);
        }

        .su4j14-hero-subtitle {
            font-size: clamp(1rem, 1vw + 0.5rem, 1.25rem);
            color: var(--su4j14-text-muted);
            margin-bottom: 32px;
            max-width: 600px;
        }

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

        /* 激活码核心展示区 */
        .su4j14-activation-panel {
            flex: 0 0 400px;
            min-width: 320px;
            background: var(--su4j14-white);
            padding: 40px;
            border-radius: var(--su4j14-radius);
            box-shadow: 0 20px 50px rgba(0,0,0,0.1);
            border: 1px solid rgba(0,0,0,0.05);
            text-align: center;
        }

        .su4j14-key-display {
            font-family: monospace;
            background: #f8f9fa;
            padding: 16px;
            border-radius: 8px;
            border: 1px dashed var(--su4j14-primary);
            margin: 20px 0;
            font-size: 18px;
            color: var(--su4j14-secondary);
        }

        .su4j14-btn-primary {
            display: inline-block;
            background: linear-gradient(to right, var(--su4j14-primary), #ffae42);
            color: white;
            padding: 16px 32px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: bold;
            transition: transform 0.3s, box-shadow 0.3s;
            border: none;
            cursor: pointer;
        }

        .su4j14-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(255,140,0,0.3);
        }

        /* 技术特性 - 这里的图片将由CSS形状和渐变替代 */
        .su4j14-features {
            padding: 96px 0;
            background: var(--su4j14-white);
        }

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

        .su4j14-section-title h2 {
            font-size: 2.5rem;
            color: var(--su4j14-secondary);
        }

        .su4j14-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        .su4j14-feature-card {
            background: var(--su4j14-bg-light);
            padding: 40px;
            border-radius: var(--su4j14-radius);
            transition: all 0.3s ease;
            border: 1px solid transparent;
        }

        .su4j14-feature-card:hover {
            background: var(--su4j14-white);
            border-color: var(--su4j14-primary);
            box-shadow: var(--su4j14-shadow);
            transform: translateY(-5px);
        }

        .su4j14-tech-icon {
            width: 60px;
            height: 60px;
            background: var(--su4j14-primary);
            border-radius: 12px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            font-size: 24px;
        }

        .su4j14-tech-name {
            font-size: 1.25rem;
            margin-bottom: 16px;
            color: var(--su4j14-secondary);
        }

        /* 工作流程 */
        .su4j14-workflow {
            padding: 96px 0;
            background: var(--su4j14-secondary);
            color: var(--su4j14-white);
        }

        .su4j14-workflow-steps {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: space-between;
        }

        .su4j14-step-item {
            flex: 1;
            min-width: 280px;
            padding: 32px;
            background: rgba(255,255,255,0.05);
            border-radius: var(--su4j14-radius);
            border-left: 4px solid var(--su4j14-primary);
        }

        .su4j14-step-num {
            font-size: 3rem;
            font-weight: 900;
            opacity: 0.2;
            margin-bottom: -20px;
            display: block;
        }

        .su4j14-step-phase {
            font-size: 1.5rem;
            margin-bottom: 12px;
            color: var(--su4j14-primary);
        }

        /* 授权体系 */
        .su4j14-tiers {
            padding: 96px 0;
        }

        .su4j14-tier-card {
            background: var(--su4j14-white);
            border-radius: var(--su4j14-radius);
            padding: 48px;
            box-shadow: var(--su4j14-shadow);
            flex: 1;
            min-width: 300px;
            display: flex;
            flex-direction: column;
        }

        .su4j14-tier-card.featured {
            transform: scale(1.05);
            border: 2px solid var(--su4j14-primary);
            position: relative;
        }

        .su4j14-tier-name {
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 24px;
            color: var(--su4j14-secondary);
        }

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

        .su4j14-feature-list li {
            padding: 8px 0;
            border-bottom: 1px solid #eee;
            color: var(--su4j14-text-muted);
            font-size: 15px;
        }

        .su4j14-feature-list li::before {
            content: '✓';
            color: var(--su4j14-primary);
            margin-right: 10px;
            font-weight: bold;
        }

        /* 动态内容区块 */
        .su4j14-dynamic-section {
            padding: 64px 0;
            background: #edf2f7;
        }

        /* 页脚 */
        .su4j14-footer {
            background: #1a202c;
            color: #a0aec0;
            padding: 80px 0 40px;
        }

        .su4j14-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .su4j14-footer-brand h3 {
            color: var(--su4j14-white);
            font-size: 24px;
            margin-bottom: 16px;
        }

        .su4j14-footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 32px;
            text-align: center;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .su4j14-nav-links {
                display: none; /* 简化起见，移动端隐藏或可改为汉堡菜单 */
            }
            .su4j14-hero-content {
                text-align: center;
                justify-content: center;
            }
            .su4j14-hero-text, .su4j14-activation-panel {
                flex: 0 0 100%;
            }
            .su4j14-tier-card.featured {
                transform: scale(1);
            }
        }