:root {
            --eztx-primary: #D32F2F;
            --eztx-primary-light: #FFEBEE;
            --eztx-secondary: #1976D2;
            --eztx-text-dark: #263238;
            --eztx-text-light: #546E7A;
            --eztx-bg-gray: #F8FAFC;
            --eztx-white: #FFFFFF;
            --eztx-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --eztx-radius: 16px;
            --eztx-container-width: 1100px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--eztx-text-dark);
            background-color: var(--eztx-bg-gray);
            line-height: 1.7;
            overflow-x: hidden;
        }

        /* 布局基础 */
        .eztx-container {
            max-width: var(--eztx-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .eztx-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .eztx-flex-item {
            min-width: 0;
        }

        .eztx-word-wrap {
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* 导航栏 */
        .eztx-header {
            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);
            transition: all 0.3s ease;
        }

        .eztx-nav-wrapper {
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .eztx-logo {
            flex-shrink: 0;
        }

        .eztx-logo img {
            height: 36px;
            display: block;
        }

        .eztx-nav-list {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
        }

        .eztx-nav-item a {
            text-decoration: none;
            color: var(--eztx-text-dark);
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            transition: color 0.3s;
            display: block;
        }

        .eztx-nav-item a:hover {
            color: var(--eztx-primary);
        }

        .eztx-nav-item.eztx-active a {
            color: var(--eztx-primary);
            font-weight: 700;
            position: relative;
        }

        .eztx-nav-item.eztx-active a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 14px;
            right: 14px;
            height: 3px;
            background: var(--eztx-primary);
            border-radius: 2px;
        }

        /* Hero 区块 */
        .eztx-hero {
            padding: 160px 0 96px;
            background: linear-gradient(135deg, #FFF5F5 0%, #FFFFFF 50%, #F0F7FF 100%);
            text-align: center;
        }

        .eztx-hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .eztx-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            color: var(--eztx-text-dark);
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .eztx-hero-subtitle {
            font-size: clamp(1rem, 1vw + 0.5rem, 1.25rem);
            color: var(--eztx-text-light);
            margin-bottom: 48px;
        }

        /* 下载主卡片 */
        .eztx-download-card {
            background: var(--eztx-white);
            border-radius: var(--eztx-radius);
            box-shadow: var(--eztx-shadow);
            padding: 48px;
            margin-top: 32px;
            position: relative;
            z-index: 2;
        }

        .eztx-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 24px;
            margin-top: 32px;
        }

        .eztx-platform-item {
            padding: 32px;
            border-radius: 12px;
            border: 1px solid #EDF2F7;
            transition: all 0.3s ease;
            text-align: center;
        }

        .eztx-platform-item:hover {
            transform: translateY(-8px);
            border-color: var(--eztx-primary);
            box-shadow: 0 10px 20px rgba(211, 47, 47, 0.05);
        }

        .eztx-btn {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
        }

        .eztx-btn-primary {
            background: linear-gradient(90deg, #D32F2F, #FF5252);
            color: var(--eztx-white);
            box-shadow: 0 4px 15px rgba(211, 47, 47, 0.3);
        }

        .eztx-btn-primary:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 20px rgba(211, 47, 47, 0.4);
        }

        /* 核心能力区块 */
        .eztx-section {
            padding: 96px 0;
        }

        .eztx-section-title {
            text-align: center;
            font-size: clamp(1.5rem, 2vw + 1rem, 2.5rem);
            margin-bottom: 64px;
        }

        .eztx-capability-row {
            align-items: center;
            margin-bottom: 64px;
            gap: 48px;
        }

        .eztx-capability-text {
            flex: 1;
            min-width: 320px;
        }

        .eztx-capability-visual {
            flex: 1;
            min-width: 320px;
            background: var(--eztx-white);
            padding: 32px;
            border-radius: var(--eztx-radius);
            box-shadow: var(--eztx-shadow);
        }

        .eztx-module-badge {
            display: inline-block;
            padding: 4px 12px;
            background: var(--eztx-primary-light);
            color: var(--eztx-primary);
            border-radius: 4px;
            font-size: 14px;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .eztx-tech-highlight {
            font-size: 18px;
            color: var(--eztx-text-dark);
            margin-bottom: 16px;
            font-weight: 600;
        }

        .eztx-metrics-list {
            margin-top: 24px;
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .eztx-metric-tag {
            background: #F1F5F9;
            padding: 6px 12px;
            border-radius: 6px;
            font-size: 13px;
            color: var(--eztx-secondary);
        }

        /* 页脚 */
        .eztx-footer {
            background: #1A202C;
            color: rgba(255,255,255,0.8);
            padding: 80px 0 40px;
        }

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

        .eztx-footer-brand h2 {
            color: var(--eztx-white);
            margin-bottom: 16px;
            font-size: 20px;
        }

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

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

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

        .eztx-footer-links a {
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            transition: color 0.3s;
        }

        .eztx-footer-links a:hover {
            color: var(--eztx-white);
        }

        .eztx-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .eztx-nav-list {
                display: none; /* 简化演示：移动端隐藏菜单 */
            }
            .eztx-hero {
                padding: 120px 0 64px;
            }
            .eztx-download-card {
                padding: 24px;
            }
            .eztx-capability-row {
                flex-direction: column;
            }
            .eztx-capability-text, .eztx-capability-visual {
                min-width: 100%;
            }
        }