:root {
            --su4j14-primary: #2b579a; /* Word Blue */
            --su4j14-secondary: #2d4a77; /* Recuva Deep Blue */
            --su4j14-accent: #ff8c00;
            --su4j14-bg-light: #f8f9fa;
            --su4j14-text-dark: #1a1a1a;
            --su4j14-text-muted: #555555;
            --su4j14-white: #ffffff;
            --su4j14-success: #28a745;
            --su4j14-warning: #ffc107;
            --su4j14-danger: #dc3545;
            --su4j14-spacing-unit: 8px;
        }

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

        body {
            font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            color: var(--su4j14-text-dark);
            background-color: var(--su4j14-bg-light);
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .su4j14-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.1);
        }

        .su4j14-nav-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

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

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

        .su4j14-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
        }

        .su4j14-nav-item a {
            text-decoration: none;
            color: var(--su4j14-text-dark);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 12px;
            border-radius: 4px;
            transition: all 0.3s ease;
        }

        .su4j14-nav-item a:hover {
            color: var(--su4j14-primary);
            background: rgba(43, 87, 154, 0.05);
        }

        .su4j14-nav-item a.active {
            color: var(--su4j14-primary);
            border-bottom: 2px solid var(--su4j14-primary);
            border-radius: 0;
        }

        /* Hero 区域 - 独特对角线分割布局 */
        .su4j14-hero {
            padding-top: 140px;
            padding-bottom: 80px;
            background: linear-gradient(135deg, #ffffff 0%, #eef2f7 100%);
            position: relative;
            overflow: hidden;
        }

        .su4j14-hero::after {
            content: "";
            position: absolute;
            bottom: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: rgba(43, 87, 154, 0.03);
            clip-path: polygon(100% 0, 0% 100%, 100% 100%);
            z-index: 1;
        }

        .su4j14-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 32px;
            position: relative;
            z-index: 2;
        }

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

        .su4j14-hero-text {
            flex: 1;
            min-width: 300px;
        }

        .su4j14-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--su4j14-secondary);
            font-weight: 800;
            word-break: break-word;
        }

        .su4j14-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--su4j14-text-muted);
            margin-bottom: 32px;
            max-width: 600px;
            line-height: 1.8;
        }

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

        .su4j14-btn {
            display: inline-block;
            padding: 16px 32px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            text-align: center;
        }

        .su4j14-btn-primary {
            background: var(--su4j14-primary);
            color: white;
            box-shadow: 0 4px 15px rgba(43, 87, 154, 0.3);
        }

        .su4j14-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 20px rgba(43, 87, 154, 0.4);
        }

        /* 核心技术展示 */
        .su4j14-tech-section {
            padding: 96px 0;
            background: white;
        }

        .su4j14-section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 64px;
            font-weight: 700;
        }

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

        .su4j14-tech-card {
            background: var(--su4j14-bg-light);
            padding: 40px;
            border-radius: 20px;
            border: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
        }

        .su4j14-tech-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            border-color: var(--su4j14-primary);
        }

        .su4j14-tech-name {
            font-size: 1.5rem;
            color: var(--su4j14-primary);
            margin-bottom: 16px;
            font-weight: 700;
        }

        .su4j14-tech-desc {
            font-size: 1rem;
            color: var(--su4j14-text-muted);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .su4j14-tech-benefit {
            padding: 12px;
            background: rgba(43, 87, 154, 0.05);
            border-left: 4px solid var(--su4j14-primary);
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--su4j14-secondary);
        }

        /* 工作流程 */
        .su4j14-workflow-section {
            padding: 96px 0;
            background: #111;
            color: white;
        }

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

        .su4j14-workflow-step {
            flex: 1;
            min-width: 280px;
            position: relative;
            padding: 32px;
            background: rgba(255,255,255,0.05);
            border-radius: 16px;
        }

        .su4j14-step-number {
            font-size: 4rem;
            font-weight: 900;
            opacity: 0.2;
            position: absolute;
            top: 10px;
            right: 20px;
            color: var(--su4j14-primary);
        }

        .su4j14-step-phase {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--su4j14-accent);
        }

        .su4j14-step-action {
            font-size: 1rem;
            line-height: 1.8;
            opacity: 0.8;
        }

        /* 版本对比 */
        .su4j14-tier-section {
            padding: 96px 0;
        }

        .su4j14-tier-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }

        .su4j14-tier-card {
            background: white;
            border-radius: 16px;
            padding: 40px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            border: 2px solid transparent;
            transition: all 0.3s ease;
        }

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

        .su4j14-tier-name {
            font-size: 1.75rem;
            margin-bottom: 8px;
            color: var(--su4j14-secondary);
        }

        .su4j14-tier-user {
            font-size: 0.9rem;
            color: var(--su4j14-text-muted);
            margin-bottom: 32px;
            display: block;
        }

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

        .su4j14-tier-features li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            font-size: 0.95rem;
        }

        /* 页脚 */
        .su4j14-footer {
            background: #1a1a1a;
            color: #ccc;
            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: white;
            font-size: 1.5rem;
            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: #888;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .su4j14-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #333;
            font-size: 0.85rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .su4j14-nav-container {
                height: auto;
                padding: 16px;
            }
            .su4j14-nav-menu {
                display: none; /* 简化演示，实际应有汉堡菜单 */
            }
            .su4j14-hero {
                padding-top: 100px;
                text-align: center;
            }
            .su4j14-hero-text {
                min-width: 100%;
            }
            .su4j14-btn-group {
                justify-content: center;
            }
            .su4j14-tier-card.featured {
                transform: none;
            }
        }

        /* 文章区块标记样式 */
        .su4j14-dynamic-articles {
            padding: 64px 0;
            background: var(--su4j14-bg-light);
        }