:root {
            --mldow-primary: #1e3a8a;
            --mldow-secondary: #3b82f6;
            --mldow-accent: #10b981;
            --mldow-dark: #0f172a;
            --mldow-light: #f8fafc;
            --mldow-text: #334155;
            --mldow-kbd-bg: #e2e8f0;
            --mldow-kbd-shadow: #cbd5e1;
            --mldow-gap-base: 8px;
            --mldow-max-width: 1300px;
        }

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

        body {
            font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            color: var(--mldow-text);
            background-color: var(--mldow-light);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航栏 */
        .mldow-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 72px;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            display: flex;
            align-items: center;
        }

        .mldow-nav-container {
            max-width: var(--mldow-max-width);
            margin: 0 auto;
            width: 100%;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

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

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

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

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

        .mldow-nav-link:hover {
            color: var(--mldow-primary);
            background: rgba(59, 130, 246, 0.1);
        }

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

        /* Hero 区 - 独特对角线设计 */
        .mldow-hero {
            padding-top: 160px;
            padding-bottom: 100px;
            background: linear-gradient(135deg, var(--mldow-dark) 0%, var(--mldow-primary) 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
            clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
        }

        .mldow-hero-content {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
            padding: 0 24px;
            position: relative;
            z-index: 2;
        }

        .mldow-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            margin-bottom: 24px;
            line-height: 1.2;
            word-break: break-word;
        }

        .mldow-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.3rem);
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto 40px;
            word-break: break-word;
        }

        /* 快捷键表格区块 */
        .mldow-section {
            padding: 80px 24px;
            max-width: var(--mldow-max-width);
            margin: 0 auto;
        }

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

        .mldow-card {
            background: #fff;
            border-radius: 16px;
            padding: 32px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
            border: 1px solid #edf2f7;
            min-width: 0;
            transition: transform 0.3s ease;
        }

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

        .mldow-card-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--mldow-primary);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .mldow-shortcut-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px dashed #e2e8f0;
            gap: 16px;
        }

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

        .mldow-action {
            font-size: 0.95rem;
            color: var(--mldow-text);
            flex: 1;
        }

        .mldow-keys {
            display: flex;
            gap: 4px;
            flex-wrap: wrap;
            justify-content: flex-end;
            min-width: 0;
        }

        kbd {
            background-color: var(--mldow-kbd-bg);
            border: 1px solid var(--mldow-kbd-shadow);
            border-radius: 4px;
            box-shadow: 0 2px 0 var(--mldow-kbd-shadow);
            color: var(--mldow-dark);
            display: inline-block;
            font-family: inherit;
            font-size: 0.85rem;
            font-weight: 700;
            line-height: 1;
            padding: 4px 8px;
            white-space: nowrap;
        }

        /* 协议面板 */
        .mldow-protocol-nexus {
            background: #fff;
            border-radius: 24px;
            padding: 48px;
            margin: 40px auto;
            border: 1px solid #e2e8f0;
        }

        .mldow-protocol-item {
            margin-bottom: 32px;
            padding-bottom: 32px;
            border-bottom: 1px solid #f1f5f9;
        }

        .mldow-protocol-item:last-child {
            border-bottom: none;
            margin-bottom: 0;
            padding-bottom: 0;
        }

        .mldow-protocol-header {
            font-weight: 800;
            color: var(--mldow-dark);
            font-size: 1.25rem;
            margin-bottom: 12px;
        }

        .mldow-protocol-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 12px;
        }

        .mldow-tag {
            background: var(--mldow-light);
            color: var(--mldow-secondary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
        }

        .mldow-protocol-desc {
            font-size: 1rem;
            color: #64748b;
        }

        /* 底部 CTA */
        .mldow-cta {
            background: var(--mldow-dark);
            padding: 80px 24px;
            text-align: center;
            color: #fff;
        }

        .mldow-btn {
            display: inline-block;
            background: var(--mldow-secondary);
            color: #fff;
            padding: 16px 40px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 700;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(59, 130, 246, 0.4);
        }

        .mldow-btn:hover {
            transform: scale(1.05);
            background: #2563eb;
        }

        /* 页脚 */
        .mldow-footer {
            background: #f1f5f9;
            padding: 60px 24px;
            border-top: 1px solid #e2e8f0;
        }

        .mldow-footer-content {
            max-width: var(--mldow-max-width);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 40px;
        }

        .mldow-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .mldow-footer-brand h2 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--mldow-primary);
        }

        .mldow-footer-links {
            display: flex;
            gap: 60px;
            flex-wrap: wrap;
        }

        .mldow-footer-group h4 {
            margin-bottom: 20px;
            font-size: 1rem;
            color: var(--mldow-dark);
        }

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

        .mldow-footer-group ul li {
            margin-bottom: 10px;
        }

        .mldow-footer-group ul li a {
            text-decoration: none;
            color: #64748b;
            font-size: 0.9rem;
            transition: color 0.3s;
        }

        .mldow-footer-group ul li a:hover {
            color: var(--mldow-primary);
        }

        .mldow-copyright {
            text-align: center;
            padding-top: 40px;
            margin-top: 40px;
            border-top: 1px solid #e2e8f0;
            color: #94a3b8;
            font-size: 0.85rem;
            width: 100%;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .mldow-nav-menu {
                display: none; /* 简化演示，手机端可做成汉堡菜单 */
            }
            .mldow-hero {
                padding-top: 120px;
                padding-bottom: 60px;
                clip-path: none;
            }
            .mldow-grid {
                grid-template-columns: 1fr;
            }
            .mldow-protocol-nexus {
                padding: 24px;
            }
            .mldow-footer-content {
                flex-direction: column;
            }
        }