:root {
            --mldow-primary: #3e689a;
            --mldow-secondary: #2c3e50;
            --mldow-accent: #e74c3c;
            --mldow-bg-light: #f8fafc;
            --mldow-text: #334155;
            --mldow-white: #ffffff;
            --mldow-border: #e2e8f0;
            --mldow-terminal-bg: #1e1e1e;
        }

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

        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--mldow-bg-light);
            color: var(--mldow-text);
            line-height: 1.7;
            overflow-x: hidden;
        }

        /* 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 var(--mldow-border);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .mldow-nav-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            flex-wrap: wrap;
        }

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

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

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

        .mldow-nav-link {
            text-decoration: none;
            color: var(--mldow-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 6px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .mldow-nav-link:hover {
            color: var(--mldow-primary);
            background: rgba(62, 104, 154, 0.08);
        }

        .mldow-nav-link.active {
            color: var(--mldow-white);
            background: var(--mldow-primary);
        }

        /* Hero 区域 - 独特诊断室布局 */
        .mldow-hero-section {
            padding: 80px 24px;
            background: linear-gradient(135deg, #1a2a6c, #2a4858);
            color: var(--mldow-white);
            position: relative;
            overflow: hidden;
        }

        .mldow-hero-content {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .mldow-hero-text {
            flex: 1;
            min-width: 320px;
            word-break: break-word;
        }

        .mldow-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            white-space: normal;
        }

        .mldow-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            opacity: 0.9;
            margin-bottom: 32px;
            max-width: 600px;
        }

        .mldow-terminal-mockup {
            flex: 1;
            min-width: 320px;
            background: var(--mldow-terminal-bg);
            border-radius: 12px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
            border: 1px solid rgba(255,255,255,0.1);
            overflow: hidden;
            font-family: 'Consolas', 'Monaco', monospace;
        }

        .mldow-terminal-header {
            background: #333;
            padding: 10px 16px;
            display: flex;
            gap: 8px;
        }

        .mldow-dot { width: 12px; height: 12px; border-radius: 50%; }
        .mldow-dot-red { background: #ff5f56; }
        .mldow-dot-yellow { background: #ffbd2e; }
        .mldow-dot-green { background: #27c93f; }

        .mldow-terminal-body {
            padding: 20px;
            font-size: 14px;
            color: #d1d5db;
        }

        .mldow-error-line { color: #f87171; }
        .mldow-cmd-line { color: #34d399; }

        /* 内容区块通用 */
        .mldow-section {
            padding: 96px 24px;
            max-width: 1100px;
            margin: 0 auto;
        }

        .mldow-section-title {
            font-size: 2.25rem;
            color: var(--mldow-secondary);
            margin-bottom: 48px;
            text-align: center;
            font-weight: 700;
        }

        /* 核心诊断网格 */
        .mldow-diagnosis-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .mldow-diag-card {
            background: var(--mldow-white);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--mldow-border);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            min-width: 0;
            word-break: break-word;
        }

        .mldow-diag-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        .mldow-diag-icon {
            font-size: 2.5rem;
            margin-bottom: 24px;
            color: var(--mldow-primary);
        }

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

        /* 解决步骤流程 */
        .mldow-steps-container {
            background: var(--mldow-white);
            border-radius: 24px;
            padding: 48px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.03);
        }

        .mldow-step-item {
            display: flex;
            gap: 24px;
            margin-bottom: 40px;
            flex-wrap: wrap;
        }

        .mldow-step-number {
            width: 48px;
            height: 48px;
            background: var(--mldow-primary);
            color: var(--mldow-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            flex-shrink: 0;
        }

        .mldow-step-content {
            flex: 1;
            min-width: 280px;
        }

        .mldow-code-block {
            background: #f1f5f9;
            padding: 16px;
            border-radius: 8px;
            font-family: monospace;
            margin-top: 12px;
            display: block;
            border-left: 4px solid var(--mldow-primary);
        }

        /* 技术亮点区 */
        .mldow-protocol-nexus {
            background: var(--mldow-secondary);
            color: var(--mldow-white);
            padding: 80px 24px;
            border-radius: 32px;
            margin: 64px auto;
        }

        .mldow-nexus-item {
            padding: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }

        .mldow-nexus-item:last-child { border-bottom: none; }

        .mldow-nexus-tag {
            background: var(--mldow-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            margin-bottom: 12px;
            display: inline-block;
        }

        /* 页脚 */
        .mldow-footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 80px 24px 40px;
        }

        .mldow-footer-content {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 48px;
        }

        .mldow-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .mldow-footer-title {
            color: var(--mldow-white);
            font-size: 1.5rem;
            margin-bottom: 16px;
            font-weight: 700;
        }

        .mldow-footer-links {
            flex: 2;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 32px;
        }

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

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

        .mldow-footer-list a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s;
        }

        .mldow-footer-list a:hover { color: var(--mldow-white); }

        .mldow-copyright {
            max-width: 1100px;
            margin: 64px auto 0;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 0.9rem;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .mldow-nav-container { height: auto; padding: 16px; }
            .mldow-nav-menu { width: 100%; margin-top: 16px; justify-content: center; }
            .mldow-section { padding: 64px 20px; }
            .mldow-hero-section { padding: 60px 20px; }
            .mldow-steps-container { padding: 24px; }
        }