:root {
            --su4j14-primary: #ff8c00;
            --su4j14-secondary: #2c3e50;
            --su4j14-accent: #3498db;
            --su4j14-bg-light: #f9fbfd;
            --su4j14-text-dark: #1a1a1a;
            --su4j14-text-muted: #666;
            --su4j14-white: #ffffff;
            --su4j14-success: #27ae60;
            --su4j14-radius: 16px;
            --su4j14-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --su4j14-transition: all 0.3s ease;
        }

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

        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;
        }

        /* 导航栏设计 */
        .su4j14-navbar {
            position: fixed;
            top: 0;
            left: 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);
            padding: 16px 0;
        }

        .su4j14-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 48px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
        }

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

        .su4j14-logo img {
            height: 40px;
            display: block;
        }

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

        .su4j14-nav-menu li {
            min-width: 0;
        }

        .su4j14-nav-menu a {
            text-decoration: none;
            color: var(--su4j14-secondary);
            font-weight: 500;
            font-size: 15px;
            transition: var(--su4j14-transition);
            position: relative;
        }

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

        .su4j14-nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--su4j14-primary);
        }

        /* Hero 区域 - 采用了创新的侧边装饰与大字报风格 */
        .su4j14-hero {
            padding: 160px 0 96px;
            background: linear-gradient(135deg, #fff 0%, #f0f4f8 100%);
            position: relative;
            overflow: hidden;
        }

        .su4j14-hero-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .su4j14-hero-tag {
            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: 600;
            margin-bottom: 24px;
        }

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

        .su4j14-hero p {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: var(--su4j14-text-muted);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        .su4j14-btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        .su4j14-btn {
            padding: 16px 40px;
            border-radius: var(--su4j14-radius);
            font-weight: 600;
            text-decoration: none;
            transition: var(--su4j14-transition);
            cursor: pointer;
            border: none;
        }

        .su4j14-btn-primary {
            background: var(--su4j14-primary);
            color: white;
            box-shadow: 0 4px 15px rgba(255,140,0,0.3);
        }

        .su4j14-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(255,140,0,0.4);
        }

        /* 核心技术展示 - 非对称布局 */
        .su4j14-section {
            padding: 96px 0;
            max-width: 1400px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

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

        .su4j14-section-title h2 {
            font-size: 2.5rem;
            color: var(--su4j14-secondary);
            margin-bottom: 16px;
        }

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

        .su4j14-tech-card {
            background: var(--su4j14-white);
            padding: 48px;
            border-radius: var(--su4j14-radius);
            box-shadow: var(--su4j14-shadow);
            transition: var(--su4j14-transition);
            border: 1px solid rgba(0,0,0,0.02);
            position: relative;
            overflow: hidden;
        }

        .su4j14-tech-card:hover {
            transform: translateY(-10px);
        }

        .su4j14-tech-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--su4j14-primary);
        }

        .su4j14-tech-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--su4j14-secondary);
        }

        .su4j14-tech-benefit {
            margin-top: 24px;
            padding-top: 24px;
            border-top: 1px dashed #eee;
            font-weight: 600;
            color: var(--su4j14-success);
        }

        /* 工作流步骤 - 独特的时间轴卡片 */
        .su4j14-workflow {
            background: var(--su4j14-secondary);
            color: white;
            padding: 96px 24px;
            border-radius: 40px;
            margin: 48px auto;
            max-width: 1300px;
        }

        .su4j14-workflow-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
        }

        .su4j14-step-item {
            flex: 1;
            min-width: 280px;
            background: rgba(255,255,255,0.05);
            padding: 40px;
            border-radius: var(--su4j14-radius);
            border: 1px solid rgba(255,255,255,0.1);
        }

        .su4j14-step-num {
            font-size: 3rem;
            font-weight: 800;
            color: var(--su4j14-primary);
            opacity: 0.5;
            margin-bottom: 16px;
            display: block;
        }

        .su4j14-step-phase {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 16px;
            display: block;
        }

        /* 价格体系 - 极简主义设计 */
        .su4j14-tiers {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
            margin-top: 48px;
        }

        .su4j14-tier-card {
            background: white;
            padding: 40px;
            border-radius: var(--su4j14-radius);
            text-align: center;
            border: 2px solid transparent;
            transition: var(--su4j14-transition);
        }

        .su4j14-tier-card.featured {
            border-color: var(--su4j14-primary);
            transform: scale(1.05);
            z-index: 5;
        }

        .su4j14-tier-name {
            font-size: 1.2rem;
            font-weight: bold;
            margin-bottom: 8px;
            color: var(--su4j14-secondary);
        }

        .su4j14-tier-target {
            font-size: 0.9rem;
            color: var(--su4j14-text-muted);
            margin-bottom: 24px;
        }

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

        .su4j14-feature-list li {
            padding: 10px 0;
            border-bottom: 1px solid #f0f0f0;
            font-size: 14px;
        }

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

        /* 页脚 */
        .su4j14-footer {
            background: #111;
            color: #ccc;
            padding: 80px 24px 40px;
            margin-top: 96px;
        }

        .su4j14-footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
        }

        .su4j14-footer-brand h2 {
            color: white;
            margin-bottom: 16px;
        }

        .su4j14-footer-links h4 {
            color: white;
            margin-bottom: 24px;
        }

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

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

        .su4j14-footer-links a {
            color: #999;
            text-decoration: none;
            transition: var(--su4j14-transition);
        }

        .su4j14-footer-links a:hover {
            color: var(--su4j14-primary);
        }

        .su4j14-copyright {
            text-align: center;
            padding-top: 48px;
            margin-top: 48px;
            border-top: 1px solid #222;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .su4j14-nav-container {
                padding: 0 24px;
            }
            .su4j14-nav-menu {
                display: none; /* 简化演示，实际可做汉堡菜单 */
            }
            .su4j14-hero {
                padding: 120px 0 64px;
            }
            .su4j14-tier-card.featured {
                transform: scale(1);
            }
        }