:root {
            --zfrc1y-primary: #6366F1;
            --zfrc1y-primary-dark: #4f46e5;
            --zfrc1y-accent: #f59e0b;
            --zfrc1y-bg-dark: #0f172a;
            --zfrc1y-bg-light: #f8fafc;
            --zfrc1y-text-main: #1e293b;
            --zfrc1y-text-muted: #64748b;
            --zfrc1y-white: #ffffff;
            --zfrc1y-spacing-unit: 8px;
            --zfrc1y-container-max: 1300px;
        }

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

        body {
            font-family: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--zfrc1y-bg-light);
            color: var(--zfrc1y-text-main);
            line-height: 1.8;
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        /* Layout Utilities */
        .zfrc1y-container {
            max-width: var(--zfrc1y-container-max);
            margin: 0 auto;
            padding: 0 calc(var(--zfrc1y-spacing-unit) * 3);
            width: 100%;
        }

        .zfrc1y-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .zfrc1y-grid {
            display: grid;
            gap: calc(var(--zfrc1y-spacing-unit) * 4);
        }

        /* Navigation */
        .zfrc1y-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            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);
        }

        .zfrc1y-nav-container {
            height: 80px;
            justify-content: space-between;
            align-items: center;
        }

        .zfrc1y-logo img {
            height: 40px;
            width: auto;
            display: block;
        }

        .zfrc1y-menu {
            list-style: none;
            gap: calc(var(--zfrc1y-spacing-unit) * 3);
        }

        .zfrc1y-menu-item a {
            text-decoration: none;
            color: var(--zfrc1y-text-main);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
            padding: 8px 12px;
            border-radius: 6px;
        }

        .zfrc1y-menu-item a:hover {
            color: var(--zfrc1y-primary);
            background: rgba(99, 102, 241, 0.05);
        }

        .zfrc1y-menu-item a.zfrc1y-active {
            color: var(--zfrc1y-primary);
            border-bottom: 2px solid var(--zfrc1y-primary);
            border-radius: 0;
        }

        /* Hero Section - Unique Blueprint Style */
        .zfrc1y-hero {
            background: var(--zfrc1y-bg-dark);
            padding: calc(var(--zfrc1y-spacing-unit) * 12) 0;
            color: var(--zfrc1y-white);
            position: relative;
            overflow: hidden;
        }

        .zfrc1y-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: 40px 40px;
        }

        .zfrc1y-hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }

        .zfrc1y-hero-title {
            font-size: clamp(2rem, 5vw, 3.5rem);
            font-weight: 800;
            margin-bottom: calc(var(--zfrc1y-spacing-unit) * 3);
            line-height: 1.2;
            background: linear-gradient(135deg, #fff 0%, #a5b4fc 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .zfrc1y-hero-subtitle {
            font-size: clamp(1rem, 2vw, 1.25rem);
            color: #94a3b8;
            margin-bottom: calc(var(--zfrc1y-spacing-unit) * 5);
        }

        /* Tutorial Section */
        .zfrc1y-tutorial-section {
            padding: calc(var(--zfrc1y-spacing-unit) * 10) 0;
        }

        .zfrc1y-section-title {
            font-size: 2.25rem;
            margin-bottom: calc(var(--zfrc1y-spacing-unit) * 6);
            position: relative;
            padding-bottom: 15px;
        }

        .zfrc1y-section-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--zfrc1y-primary);
        }

        .zfrc1y-filter-card {
            background: var(--zfrc1y-white);
            border: 1px solid rgba(0,0,0,0.05);
            border-radius: 16px;
            padding: calc(var(--zfrc1y-spacing-unit) * 4);
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
            min-width: 0;
        }

        .zfrc1y-filter-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .zfrc1y-card-tag {
            display: inline-block;
            background: rgba(99, 102, 241, 0.1);
            color: var(--zfrc1y-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .zfrc1y-card-title {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }

        .zfrc1y-card-desc {
            color: var(--zfrc1y-text-muted);
            font-size: 1rem;
        }

        /* Ecosystem Solutions Section */
        .zfrc1y-eco-section {
            background: #f1f5f9;
            padding: calc(var(--zfrc1y-spacing-unit) * 12) 0;
        }

        .zfrc1y-eco-item {
            background: var(--zfrc1y-white);
            border-radius: 24px;
            overflow: hidden;
            margin-bottom: calc(var(--zfrc1y-spacing-unit) * 6);
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

        .zfrc1y-eco-visual {
            background: var(--zfrc1y-primary);
            color: white;
            padding: 40px;
            flex: 1 1 400px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-width: 0;
        }

        .zfrc1y-eco-content {
            padding: 40px;
            flex: 1 1 500px;
            min-width: 0;
        }

        .zfrc1y-eco-tool {
            font-weight: 700;
            color: var(--zfrc1y-primary);
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 0.85rem;
            margin-bottom: 8px;
            display: block;
        }

        /* Code/Config Block */
        .zfrc1y-code-block {
            background: #1e293b;
            color: #e2e8f0;
            padding: 24px;
            border-radius: 12px;
            font-family: "Fira Code", monospace;
            font-size: 0.9rem;
            margin-top: 20px;
            overflow-x: auto;
            border-left: 4px solid var(--zfrc1y-accent);
        }

        /* Footer */
        .zfrc1y-footer {
            background: var(--zfrc1y-bg-dark);
            color: var(--zfrc1y-white);
            padding: calc(var(--zfrc1y-spacing-unit) * 10) 0;
            text-align: center;
        }

        .zfrc1y-footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .zfrc1y-footer-links {
            list-style: none;
            gap: 20px;
            justify-content: center;
            margin-bottom: 32px;
        }

        .zfrc1y-footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
        }

        .zfrc1y-footer-links a:hover {
            color: var(--zfrc1y-white);
        }

        .zfrc1y-copyright {
            color: #64748b;
            font-size: 0.85rem;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .zfrc1y-menu {
                display: none; /* Simplification for demo: In real project use a hamburger */
            }
            .zfrc1y-eco-item {
                flex-direction: column;
            }
            .zfrc1y-grid {
                grid-template-columns: 1fr !important;
            }
        }

        @media (min-width: 769px) {
            .zfrc1y-grid-3 {
                grid-template-columns: repeat(3, 1fr);
            }
        }