:root {
            --mldow-primary: #0066cc;
            --mldow-secondary: #2c3e50;
            --mldow-accent: #00d2ff;
            --mldow-bg-light: #f4f7f9;
            --mldow-bg-dark: #0a192f;
            --mldow-text-main: #333333;
            --mldow-text-light: #666666;
            --mldow-white: #ffffff;
            --mldow-radius: 12px;
            --mldow-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.7;
            color: var(--mldow-text-main);
            background-color: var(--mldow-white);
            word-break: break-word;
            overflow-x: hidden;
        }

        /* 布局容器 */
        .mldow-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 导航栏 */
        .mldow-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
        }

        .mldow-nav {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            min-height: 70px;
        }

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

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

        .mldow-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .mldow-menu-item a {
            text-decoration: none;
            color: var(--mldow-secondary);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 6px;
            transition: var(--mldow-transition);
            font-size: 15px;
            white-space: nowrap;
        }

        .mldow-menu-item a:hover {
            background: rgba(0, 102, 204, 0.08);
            color: var(--mldow-primary);
        }

        .mldow-menu-item a.active {
            background: var(--mldow-primary);
            color: var(--mldow-white);
        }

        /* Hero 区块 */
        .mldow-hero {
            padding: 96px 0;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            overflow: hidden;
            position: relative;
        }

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

        .mldow-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .mldow-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            color: var(--mldow-secondary);
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .mldow-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            color: var(--mldow-text-light);
            margin-bottom: 32px;
            max-width: 600px;
        }

        .mldow-hero-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        .mldow-hero-card {
            background: var(--mldow-white);
            border-radius: 20px;
            padding: 32px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.1);
            border: 1px solid rgba(255,255,255,0.2);
            transform: perspective(1000px) rotateY(-5deg);
            transition: var(--mldow-transition);
        }

        .mldow-hero-card:hover {
            transform: perspective(1000px) rotateY(0deg);
        }

        /* 协议连接中心 */
        .mldow-protocol-section {
            padding: 80px 0;
        }

        .mldow-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .mldow-section-title {
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            color: var(--mldow-secondary);
            margin-bottom: 16px;
        }

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

        .mldow-nexus-card {
            background: var(--mldow-bg-light);
            border-radius: var(--mldow-radius);
            padding: 40px;
            transition: var(--mldow-transition);
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .mldow-nexus-card:hover {
            background: var(--mldow-white);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            border-color: var(--mldow-primary);
            transform: translateY(-8px);
        }

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

        .mldow-nexus-engines {
            margin: 20px 0;
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .mldow-engine-chip {
            background: rgba(0, 102, 204, 0.1);
            color: var(--mldow-primary);
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 14px;
            font-weight: 600;
        }

        .mldow-nexus-highlight {
            font-size: 15px;
            color: var(--mldow-text-light);
            border-left: 3px solid var(--mldow-accent);
            padding-left: 16px;
        }

        /* 特色列表区 */
        .mldow-feature-split {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            padding: 80px 0;
        }

        .mldow-feature-image {
            flex: 1;
            min-width: 300px;
            background: var(--mldow-bg-dark);
            height: 400px;
            border-radius: var(--mldow-radius);
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--mldow-white);
            text-align: center;
            padding: 40px;
        }

        .mldow-feature-image::before {
            content: "";
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(circle at center, rgba(0,210,255,0.2) 0%, transparent 70%);
        }

        .mldow-feature-text {
            flex: 1.2;
            min-width: 320px;
        }

        .mldow-feature-list {
            list-style: none;
            margin-top: 24px;
        }

        .mldow-feature-list li {
            position: relative;
            padding-left: 32px;
            margin-bottom: 16px;
            font-weight: 500;
        }

        .mldow-feature-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--mldow-primary);
            font-weight: bold;
        }

        /* 按钮样式 */
        .mldow-btn {
            display: inline-block;
            padding: 16px 40px;
            border-radius: 50px;
            font-weight: 700;
            text-decoration: none;
            transition: var(--mldow-transition);
            cursor: pointer;
            text-align: center;
            border: none;
        }

        .mldow-btn-primary {
            background: var(--mldow-primary);
            color: var(--mldow-white);
            box-shadow: 0 10px 20px rgba(0, 102, 204, 0.2);
        }

        .mldow-btn-primary:hover {
            transform: scale(1.05);
            background: #0052a3;
            box-shadow: 0 15px 30px rgba(0, 102, 204, 0.3);
        }

        /* 底部 */
        .mldow-footer {
            background: var(--mldow-bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 80px 0 40px;
        }

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

        .mldow-footer-brand h2 {
            color: var(--mldow-white);
            margin-bottom: 24px;
        }

        .mldow-footer-links h4 {
            color: var(--mldow-white);
            margin-bottom: 24px;
            font-size: 18px;
        }

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

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

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

        .mldow-footer-links a:hover {
            color: var(--mldow-accent);
        }

        .mldow-footer-bottom {
            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) {
            .mldow-nav {
                flex-direction: column;
                gap: 16px;
            }
            .mldow-menu {
                justify-content: center;
            }
            .mldow-hero {
                padding: 48px 0;
                text-align: center;
            }
            .mldow-hero-grid {
                flex-direction: column;
            }
            .mldow-hero-card {
                transform: none;
            }
            .mldow-feature-split {
                flex-direction: column;
            }
        }