:root {
            --zpa57-primary: #0a4da2;
            --zpa57-accent: #f39200;
            --zpa57-dark: #1e293b;
            --zpa57-light: #f8fafc;
            --zpa57-text: #334155;
            --zpa57-white: #ffffff;
            --zpa57-gray: #64748b;
            --zpa57-gradient: linear-gradient(135deg, #0a4da2 0%, #1e293b 100%);
            --zpa57-radius: 16px;
            --zpa57-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.1);
            --zpa57-container-width: 1300px;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            color: var(--zpa57-text);
            background-color: var(--zpa57-light);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: keep-all;
        }

        h1, h2, h3, h4 {
            line-height: 1.2;
            color: var(--zpa57-dark);
            white-space: normal;
            word-break: keep-all;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        img {
            max-width: 100%;
            display: block;
        }

        /* Layout Helpers */
        .zpa57-container {
            max-width: var(--zpa57-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .zpa57-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .zpa57-grid {
            display: grid;
            gap: 32px;
        }

        /* Navigation */
        .zpa57-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            padding: 16px 0;
        }

        .zpa57-nav-wrapper {
            justify-content: space-between;
            align-items: center;
        }

        .zpa57-logo img {
            height: 40px;
            width: auto;
        }

        .zpa57-nav-menu {
            gap: 24px;
            list-style: none;
        }

        .zpa57-nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--zpa57-gray);
            padding: 8px 4px;
            position: relative;
        }

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

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

        /* Hero Section */
        .zpa57-hero {
            padding: 96px 0;
            background: var(--zpa57-gradient);
            color: var(--zpa57-white);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .zpa57-hero::before {
            content: "";
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background-image: radial-gradient(circle at 2px 2px, rgba(255,255,255,0.05) 1px, transparent 0);
            background-size: 32px 32px;
        }

        .zpa57-hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }

        .zpa57-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            margin-bottom: 24px;
            font-weight: 800;
            letter-spacing: -0.02em;
        }

        .zpa57-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.4rem);
            opacity: 0.9;
            margin-bottom: 40px;
            font-weight: 300;
        }

        .zpa57-seed-tag {
            display: inline-block;
            background: rgba(255, 255, 255, 0.1);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.75rem;
            margin-top: 16px;
            font-family: monospace;
        }

        /* Download Section */
        .zpa57-download-section {
            padding: 96px 0;
            margin-top: -64px;
        }

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

        .zpa57-download-card {
            background: var(--zpa57-white);
            border-radius: var(--zpa57-radius);
            padding: 48px;
            box-shadow: var(--zpa57-shadow);
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
            position: relative;
            overflow: hidden;
            min-width: 0;
        }

        .zpa57-download-card:hover {
            transform: translateY(-8px);
        }

        .zpa57-card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: 32px;
        }

        .zpa57-version-tag {
            color: var(--zpa57-primary);
            text-transform: uppercase;
            font-weight: 700;
            font-size: 0.85rem;
            letter-spacing: 0.1em;
            margin-bottom: 12px;
            display: block;
        }

        .zpa57-card-title {
            font-size: 1.8rem;
            margin-bottom: 24px;
        }

        .zpa57-feature-list {
            list-style: none;
            margin-bottom: 40px;
            flex-grow: 1;
        }

        .zpa57-feature-item {
            padding: 8px 0;
            display: flex;
            align-items: center;
            font-size: 0.95rem;
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        }

        .zpa57-feature-item::before {
            content: "✓";
            color: #10b981;
            margin-right: 12px;
            font-weight: bold;
        }

        .zpa57-btn {
            display: inline-block;
            padding: 16px 32px;
            border-radius: 12px;
            font-weight: 600;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .zpa57-btn-primary {
            background: var(--zpa57-primary);
            color: var(--zpa57-white);
        }

        .zpa57-btn-primary:hover {
            background: var(--zpa57-dark);
            box-shadow: 0 4px 15px rgba(10, 77, 162, 0.3);
        }

        .zpa57-btn-outline {
            border: 2px solid var(--zpa57-primary);
            color: var(--zpa57-primary);
        }

        .zpa57-btn-outline:hover {
            background: var(--zpa57-primary);
            color: var(--zpa57-white);
        }

        /* Comparison Table Section */
        .zpa57-compare-section {
            padding: 96px 0;
            background: var(--zpa57-white);
        }

        .zpa57-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .zpa57-section-title {
            font-size: 2.5rem;
            margin-bottom: 16px;
        }

        .zpa57-section-desc {
            color: var(--zpa57-gray);
            max-width: 700px;
            margin: 0 auto;
        }

        .zpa57-compare-wrapper {
            background: var(--zpa57-light);
            border-radius: 24px;
            padding: 48px;
            align-items: center;
            gap: 48px;
        }

        .zpa57-compare-image {
            flex: 1;
            min-width: 300px;
            border-radius: 16px;
            box-shadow: var(--zpa57-shadow);
        }

        .zpa57-compare-content {
            flex: 1.2;
            min-width: 300px;
        }

        /* Protocol Matrix */
        .zpa57-matrix-section {
            padding: 96px 0;
        }

        .zpa57-matrix-grid {
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        }

        .zpa57-matrix-item {
            background: rgba(255, 255, 255, 0.6);
            border: 1px solid rgba(0,0,0,0.05);
            padding: 32px;
            border-radius: 20px;
            transition: all 0.3s ease;
        }

        .zpa57-matrix-item:hover {
            background: var(--zpa57-white);
            box-shadow: var(--zpa57-shadow);
        }

        .zpa57-matrix-category {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--zpa57-primary);
        }

        .zpa57-protocol-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 16px;
        }

        .zpa57-tag {
            background: #e2e8f0;
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        .zpa57-matrix-desc {
            font-size: 0.9rem;
            color: var(--zpa57-gray);
        }

        /* CTA Section */
        .zpa57-cta {
            padding: 80px 0;
            background: var(--zpa57-accent);
            color: var(--zpa57-white);
            text-align: center;
            border-radius: 32px;
            margin: 0 24px 96px;
        }

        .zpa57-cta-title {
            font-size: 2.2rem;
            margin-bottom: 24px;
            color: var(--zpa57-white);
        }

        /* Footer */
        .zpa57-footer {
            background: var(--zpa57-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 80px 0 40px;
        }

        .zpa57-footer-grid {
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding-bottom: 48px;
            margin-bottom: 40px;
        }

        .zpa57-footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--zpa57-white);
            margin-bottom: 16px;
        }

        .zpa57-footer-title {
            color: var(--zpa57-white);
            font-size: 1rem;
            margin-bottom: 24px;
            font-weight: 600;
        }

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

        .zpa57-footer-link {
            margin-bottom: 12px;
            display: block;
        }

        .zpa57-footer-link:hover {
            color: var(--zpa57-accent);
        }

        .zpa57-copyright {
            text-align: center;
            font-size: 0.85rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .zpa57-download-grid, .zpa57-matrix-grid {
                grid-template-columns: 1fr;
            }
            .zpa57-header {
                padding: 12px 0;
            }
            .zpa57-nav-menu {
                display: none; /* In a real site, you'd add a hamburger menu */
            }
            .zpa57-hero {
                padding: 64px 0;
            }
            .zpa57-compare-wrapper {
                flex-direction: column;
                padding: 24px;
            }
        }

        /* Animation enhancement */
        .zpa57-download-card, .zpa57-matrix-item, .zpa57-btn {
            will-change: transform;
        }