:root {
            --su4j14-primary: #ff8c00;
            --su4j14-secondary: #2d3e50;
            --su4j14-accent: #00a8ff;
            --su4j14-bg: #f9fbfc;
            --su4j14-text: #333333;
            --su4j14-light-text: #666666;
            --su4j14-white: #ffffff;
            --su4j14-card-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --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);
            color: var(--su4j14-text);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .su4j14-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);
        }

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

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

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

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

        .su4j14-menu li {
            margin-left: 24px;
            min-width: 0;
        }

        .su4j14-menu a {
            text-decoration: none;
            color: var(--su4j14-secondary);
            font-weight: 500;
            font-size: 15px;
            transition: var(--su4j14-transition);
            padding: 8px 0;
            position: relative;
            word-break: keep-all;
        }

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

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

        /* Hero 区域 - 独特对角线布局 */
        .su4j14-hero {
            padding: 160px 24px 100px;
            background: linear-gradient(135deg, #2d3e50 0%, #1a252f 100%);
            color: var(--su4j14-white);
            position: relative;
            overflow: hidden;
        }

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

        .su4j14-hero h1 {
            font-size: clamp(2rem, 5vw + 1rem, 3.5rem);
            line-height: 1.2;
            margin-bottom: 24px;
            font-weight: 800;
            word-break: keep-all;
        }

        .su4j14-hero p {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            max-width: 800px;
            margin: 0 auto 48px;
            opacity: 0.9;
            word-break: break-word;
        }

        /* 核心内容区 */
        .su4j14-main-container {
            max-width: 1300px;
            margin: -60px auto 0;
            padding: 0 24px 96px;
            position: relative;
            z-index: 10;
        }

        /* 文件格式网格 */
        .su4j14-format-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
            margin-bottom: 96px;
        }

        .su4j14-format-card {
            background: var(--su4j14-white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: var(--su4j14-card-shadow);
            transition: var(--su4j14-transition);
            border: 1px solid rgba(0,0,0,0.03);
            min-width: 0;
            word-break: break-word;
        }

        .su4j14-format-card:hover {
            transform: translateY(-10px);
            border-color: var(--su4j14-primary);
        }

        .su4j14-format-icon {
            font-size: 40px;
            margin-bottom: 24px;
            display: block;
        }

        .su4j14-format-card h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--su4j14-secondary);
        }

        .su4j14-format-list {
            list-style: none;
            color: var(--su4j14-light-text);
        }

        .su4j14-format-list li {
            padding: 8px 0;
            border-bottom: 1px dashed #eee;
        }

        /* 专有技术板块 */
        .su4j14-tech-section {
            background: var(--su4j14-white);
            padding: 80px 40px;
            border-radius: 24px;
            margin-bottom: 96px;
            box-shadow: var(--su4j14-card-shadow);
        }

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

        .su4j14-section-title h2 {
            font-size: clamp(1.5rem, 3vw, 2.5rem);
            color: var(--su4j14-secondary);
            margin-bottom: 16px;
        }

        .su4j14-tech-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .su4j14-tech-item {
            flex: 1;
            min-width: 300px;
            background: #fdfdfd;
            padding: 32px;
            border-radius: 12px;
            border-left: 4px solid var(--su4j14-primary);
        }

        .su4j14-tech-item h4 {
            color: var(--su4j14-primary);
            margin-bottom: 12px;
            font-size: 20px;
        }

        .su4j14-tech-benefit {
            margin-top: 16px;
            font-weight: 600;
            color: var(--su4j14-secondary);
            font-size: 0.9rem;
        }

        /* 工作流展示 */
        .su4j14-workflow {
            margin-bottom: 96px;
        }

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

        .su4j14-workflow-step {
            flex: 1;
            min-width: 280px;
            background: var(--su4j14-secondary);
            color: var(--su4j14-white);
            padding: 48px 32px;
            border-radius: 16px;
            position: relative;
            overflow: hidden;
        }

        .su4j14-step-number {
            font-size: 64px;
            font-weight: 900;
            position: absolute;
            top: -10px;
            right: 10px;
            opacity: 0.1;
        }

        .su4j14-workflow-step h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: var(--su4j14-primary);
        }

        /* 价格体系 - 独特三列卡片 */
        .su4j14-tier-section {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 96px;
        }

        .su4j14-tier-card {
            flex: 1;
            min-width: 300px;
            background: var(--su4j14-white);
            padding: 48px 32px;
            border-radius: 20px;
            text-align: center;
            box-shadow: var(--su4j14-card-shadow);
            border: 2px solid transparent;
            transition: var(--su4j14-transition);
        }

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

        .su4j14-tier-card h3 {
            font-size: 28px;
            margin-bottom: 24px;
        }

        .su4j14-feature-list {
            list-style: none;
            margin: 32px 0;
            text-align: left;
        }

        .su4j14-feature-list li {
            padding: 12px 0;
            border-bottom: 1px solid #f0f0f0;
            font-size: 15px;
        }

        .su4j14-btn {
            display: inline-block;
            padding: 14px 32px;
            background: var(--su4j14-primary);
            color: var(--su4j14-white);
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--su4j14-transition);
        }

        .su4j14-btn:hover {
            background: #e67e00;
            box-shadow: 0 5px 15px rgba(255,140,0,0.3);
        }

        /* 页脚 */
        .su4j14-footer {
            background: #1a252f;
            color: #bdc3c7;
            padding: 80px 24px 40px;
        }

        .su4j14-footer-content {
            max-width: 1300px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .su4j14-footer-brand {
            flex: 0 0 300px;
            min-width: 0;
        }

        .su4j14-footer-brand h2 {
            color: var(--su4j14-white);
            font-size: 32px;
            margin-bottom: 24px;
        }

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

        .su4j14-footer-column h4 {
            color: var(--su4j14-white);
            margin-bottom: 24px;
        }

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

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

        .su4j14-footer-column a {
            color: #bdc3c7;
            text-decoration: none;
            transition: var(--su4j14-transition);
        }

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

        .su4j14-footer-bottom {
            max-width: 1300px;
            margin: 64px auto 0;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.05);
            text-align: center;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .su4j14-nav-container {
                height: auto;
                padding: 16px;
            }
            .su4j14-menu {
                justify-content: center;
                margin-top: 16px;
                width: 100%;
            }
            .su4j14-menu li {
                margin: 0 12px 8px;
            }
            .su4j14-tier-card.pro {
                transform: scale(1);
            }
            .su4j14-hero {
                padding: 140px 24px 80px;
            }
        }