:root {
            --mldow-primary: #007bff;
            --mldow-secondary: #6c757d;
            --mldow-dark: #0f172a;
            --mldow-light: #f8fafc;
            --mldow-accent: #38bdf8;
            --mldow-bg: #ffffff;
            --mldow-text: #1e293b;
            --mldow-gray: #64748b;
            --mldow-spacing: 8px;
            --mldow-radius: 16px;
            --mldow-container: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--mldow-bg);
            color: var(--mldow-text);
            line-height: 1.7;
            word-break: keep-all;
            overflow-x: hidden;
        }

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

        /* 导航栏 */
        .mldow-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid #e2e8f0;
            padding: 12px 0;
        }

        .mldow-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            min-width: 0;
        }

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

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

        .mldow-nav-list {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
            min-width: 0;
        }

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

        .mldow-nav-list a:hover,
        .mldow-nav-list a.active {
            color: var(--mldow-primary);
            border-bottom: 2px solid var(--mldow-primary);
        }

        /* Hero 区块 - 独特居中卡片式布局 */
        .mldow-hero {
            padding: 96px 0 64px;
            background: radial-gradient(circle at top right, #f1f5f9 0%, #ffffff 100%);
            text-align: center;
        }

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

        .mldow-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            color: var(--mldow-dark);
            margin-bottom: 24px;
            line-height: 1.2;
            word-break: break-word;
        }

        .mldow-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.35rem);
            color: var(--mldow-gray);
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 激活交互区 */
        .mldow-activation-hub {
            background: #ffffff;
            border-radius: var(--mldow-radius);
            box-shadow: 0 20px 50px rgba(0,0,0,0.08);
            padding: 48px;
            margin-top: -32px;
            position: relative;
            z-index: 10;
            border: 1px solid #f1f5f9;
        }

        .mldow-hub-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            min-width: 0;
        }

        .mldow-hub-item {
            flex: 1;
            min-width: 300px;
            background: #f8fafc;
            padding: 32px;
            border-radius: 12px;
            transition: transform 0.3s ease;
        }

        .mldow-hub-item:hover {
            transform: translateY(-5px);
        }

        .mldow-hub-item h3 {
            margin-bottom: 16px;
            color: var(--mldow-primary);
            font-size: 1.5rem;
        }

        /* 技术协议展示 */
        .mldow-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .mldow-section-title h2 {
            font-size: 2.5rem;
            margin-bottom: 16px;
        }

        .mldow-protocol-nexus {
            padding: 96px 0;
            background-color: var(--mldow-dark);
            color: white;
        }

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

        .mldow-nexus-card {
            background: rgba(255, 255, 255, 0.05);
            padding: 32px;
            border-radius: var(--mldow-radius);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s;
        }

        .mldow-nexus-card:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--mldow-accent);
        }

        .mldow-nexus-tag {
            display: inline-block;
            background: var(--mldow-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .mldow-engine-list {
            margin: 16px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .mldow-engine-item {
            background: rgba(255, 255, 255, 0.1);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 13px;
        }

        /* 引导激活区 */
        .mldow-cta-section {
            padding: 96px 0;
            text-align: center;
            background: linear-gradient(135deg, #007bff 0%, #00d4ff 100%);
            color: white;
        }

        .mldow-btn {
            display: inline-block;
            padding: 16px 40px;
            background: white;
            color: var(--mldow-primary);
            text-decoration: none;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            transition: all 0.3s;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }

        .mldow-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 15px 30px rgba(0,0,0,0.2);
        }

        /* 页脚 */
        .mldow-footer {
            background: #f1f5f9;
            padding: 64px 0 32px;
            color: var(--mldow-gray);
        }

        .mldow-footer-content {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 48px;
        }

        .mldow-footer-brand {
            flex: 1;
            min-width: 250px;
        }

        .mldow-footer-brand h4 {
            color: var(--mldow-dark);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .mldow-footer-links {
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            min-width: 0;
        }

        .mldow-footer-group {
            flex: 1;
            min-width: 150px;
        }

        .mldow-footer-group h5 {
            color: var(--mldow-dark);
            margin-bottom: 16px;
        }

        .mldow-footer-group ul {
            list-style: none;
        }

        .mldow-footer-group li {
            margin-bottom: 8px;
        }

        .mldow-footer-group a {
            color: var(--mldow-gray);
            text-decoration: none;
            font-size: 14px;
        }

        .mldow-footer-bottom {
            border-top: 1px solid #e2e8f0;
            padding-top: 32px;
            text-align: center;
            font-size: 14px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .mldow-nav-list {
                display: none; /* 简化移动端，通常会有汉堡菜单 */
            }
            .mldow-hub-item {
                min-width: 100%;
            }
            .mldow-hero-title {
                font-size: 2rem;
            }
        }