:root {
            --zpa57-primary: #2c3e50;
            --zpa57-accent: #3498db;
            --zpa57-secondary: #e74c3c;
            --zpa57-bg-dark: #0f172a;
            --zpa57-bg-light: #f8fafc;
            --zpa57-text-main: #1e293b;
            --zpa57-text-muted: #64748b;
            --zpa57-white: #ffffff;
            --zpa57-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: "Inter", "Microsoft YaHei", sans-serif;
            color: var(--zpa57-text-main);
            background-color: var(--zpa57-bg-light);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局容器 */
        .zpa57-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 48px;
            width: 100%;
        }

        @media (max-width: 768px) {
            .zpa57-container {
                padding: 0 24px;
            }
        }

        /* 导航栏 */
        .zpa57-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.05);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .zpa57-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
            min-width: 0;
        }

        .zpa57-logo {
            flex-shrink: 0;
            min-width: 0;
        }

        .zpa57-logo img {
            height: 45px;
            display: block;
        }

        .zpa57-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .zpa57-nav-item {
            min-width: 0;
        }

        .zpa57-nav-link {
            text-decoration: none;
            color: var(--zpa57-text-main);
            font-weight: 500;
            font-size: 15px;
            transition: var(--zpa57-transition);
            padding: 8px 4px;
            position: relative;
        }

        .zpa57-nav-link:hover, .zpa57-nav-link.active {
            color: var(--zpa57-accent);
        }

        .zpa57-nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--zpa57-accent);
        }

        /* Hero 区域 - 独特雷达扫描风格 */
        .zpa57-hero {
            padding: 160px 0 100px;
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            color: var(--zpa57-white);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }

        .zpa57-hero-content {
            flex: 1;
            min-width: 300px;
            z-index: 2;
        }

        .zpa57-hero-visual {
            flex: 1;
            min-width: 300px;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }

        .zpa57-radar-circle {
            width: 400px;
            height: 400px;
            border: 2px solid rgba(52, 152, 219, 0.2);
            border-radius: 50%;
            position: relative;
            background: radial-gradient(circle, rgba(52, 152, 219, 0.1) 0%, transparent 70%);
        }

        .zpa57-radar-line {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 50%;
            height: 2px;
            background: linear-gradient(to right, transparent, var(--zpa57-accent));
            transform-origin: left center;
            animation: zpa57-rotate 4s linear infinite;
        }

        @keyframes zpa57-rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        .zpa57-hero-title {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.2;
            margin-bottom: 24px;
            font-weight: 800;
            word-break: break-word;
        }

        .zpa57-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            opacity: 0.9;
            margin-bottom: 40px;
            max-width: 600px;
        }

        /* 协议矩阵区块 */
        .zpa57-section {
            padding: 96px 0;
            word-break: break-word;
        }

        .zpa57-section-title {
            text-align: center;
            font-size: clamp(2rem, 3vw, 2.5rem);
            margin-bottom: 64px;
            color: var(--zpa57-primary);
        }

        .zpa57-matrix-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 32px;
        }

        .zpa57-matrix-card {
            background: var(--zpa57-white);
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            transition: var(--zpa57-transition);
            border: 1px solid rgba(0,0,0,0.05);
            min-width: 0;
        }

        .zpa57-matrix-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .zpa57-category-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(52, 152, 219, 0.1);
            color: var(--zpa57-accent);
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .zpa57-protocol-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 20px 0;
        }

        .zpa57-protocol-item {
            background: #f1f5f9;
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 13px;
            color: var(--zpa57-text-muted);
        }

        /* 核心扫描功能展示 */
        .zpa57-feature-split {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 80px;
        }

        .zpa57-feature-text {
            flex: 1;
            min-width: 320px;
        }

        .zpa57-feature-image-placeholder {
            flex: 1;
            min-width: 320px;
            background: #e2e8f0;
            border-radius: 24px;
            aspect-ratio: 16 / 10;
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(0,0,0,0.1);
        }

        .zpa57-feature-image-placeholder::before {
            content: 'MobaXterm Scanner UI';
            color: #94a3b8;
            font-weight: bold;
        }

        /* 列表/动态内容 */
        .zpa57-dynamic-section {
            background: #f1f5f9;
            border-radius: 32px;
            padding: 80px 48px;
        }

        .zpa57-news-item {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            padding: 24px;
            background: var(--zpa57-white);
            margin-bottom: 16px;
            border-radius: 12px;
            min-width: 0;
        }

        /* 页脚 */
        .zpa57-footer {
            background: var(--zpa57-primary);
            color: rgba(255,255,255,0.8);
            padding: 80px 0 40px;
        }

        .zpa57-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 60px;
        }

        .zpa57-footer-brand {
            font-size: 24px;
            font-weight: 800;
            color: var(--zpa57-white);
            margin-bottom: 20px;
        }

        .zpa57-footer-title {
            color: var(--zpa57-white);
            font-size: 18px;
            margin-bottom: 24px;
        }

        .zpa57-footer-links {
            list-style: none;
        }

        .zpa57-footer-link {
            display: block;
            color: rgba(255,255,255,0.6);
            text-decoration: none;
            margin-bottom: 12px;
            transition: var(--zpa57-transition);
        }

        .zpa57-footer-link:hover {
            color: var(--zpa57-accent);
            padding-left: 8px;
        }

        .zpa57-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) {
            .zpa57-nav-menu {
                display: none; /* 简化演示，实际可做汉堡菜单 */
            }
            .zpa57-hero {
                padding-top: 120px;
                text-align: center;
            }
            .zpa57-hero-content {
                order: 2;
            }
            .zpa57-hero-visual {
                order: 1;
                margin-bottom: 40px;
            }
            .zpa57-radar-circle {
                width: 280px;
                height: 280px;
            }
            .zpa57-feature-split:nth-child(even) {
                flex-direction: column-reverse;
            }
        }