:root {
            --i0yps4-primary: #004c99;
            --i0yps4-secondary: #f39200;
            --i0yps4-accent: #e6f2ff;
            --i0yps4-text: #2d3436;
            --i0yps4-text-light: #636e72;
            --i0yps4-bg: #ffffff;
            --i0yps4-bg-alt: #f8fafc;
            --i0yps4-border: #e2e8f0;
            --i0yps4-shadow: 0 4px 20px rgba(0, 76, 153, 0.08);
            --i0yps4-max-width: 1300px;
        }

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

        body {
            font-family: "Inter", "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--i0yps4-text);
            background-color: var(--i0yps4-bg);
            line-height: 1.7;
            word-break: break-word;
            overflow-x: hidden;
        }

        /* Utility Classes */
        .i0yps4-container {
            width: 100%;
            max-width: var(--i0yps4-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .i0yps4-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .i0yps4-flex-item {
            min-width: 0;
        }

        /* Navigation */
        .i0yps4-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--i0yps4-border);
            transition: all 0.3s ease;
        }

        .i0yps4-navbar {
            height: 80px;
            align-items: center;
            justify-content: space-between;
        }

        .i0yps4-logo {
            flex: 0 0 auto;
        }

        .i0yps4-logo img {
            height: 40px;
            width: auto;
            display: block;
        }

        .i0yps4-nav-menu {
            list-style: none;
            gap: 8px;
        }

        .i0yps4-nav-link {
            text-decoration: none;
            color: var(--i0yps4-text);
            font-weight: 500;
            padding: 10px 16px;
            border-radius: 8px;
            font-size: 0.95rem;
            transition: all 0.2s ease;
        }

        .i0yps4-nav-link:hover {
            color: var(--i0yps4-primary);
            background: var(--i0yps4-accent);
        }

        .i0yps4-nav-link.active {
            color: var(--i0yps4-primary);
            background: var(--i0yps4-accent);
            position: relative;
        }

        /* Hero Section - Technical Blueprint Style */
        .i0yps4-hero {
            padding: 96px 0;
            background: radial-gradient(circle at top right, #f0f7ff 0%, #ffffff 70%);
            position: relative;
            overflow: hidden;
        }

        .i0yps4-hero::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--i0yps4-border), transparent);
        }

        .i0yps4-hero-content {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .i0yps4-hero-tag {
            display: inline-block;
            padding: 6px 16px;
            background: var(--i0yps4-accent);
            color: var(--i0yps4-primary);
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 700;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .i0yps4-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            color: var(--i0yps4-primary);
            margin-bottom: 24px;
        }

        .i0yps4-hero-desc {
            font-size: clamp(1.1rem, 1vw + 0.5rem, 1.3rem);
            color: var(--i0yps4-text-light);
            margin-bottom: 32px;
        }

        /* Configuration Steps Section */
        .i0yps4-section {
            padding: 96px 0;
        }

        .i0yps4-section-alt {
            background-color: var(--i0yps4-bg-alt);
        }

        .i0yps4-grid-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .i0yps4-step-card {
            background: var(--i0yps4-bg);
            padding: 40px;
            border-radius: 20px;
            border: 1px solid var(--i0yps4-border);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
        }

        .i0yps4-step-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--i0yps4-shadow);
            border-color: var(--i0yps4-primary);
        }

        .i0yps4-step-number {
            font-size: 3rem;
            font-weight: 900;
            color: var(--i0yps4-accent);
            position: absolute;
            top: 20px;
            right: 30px;
            line-height: 1;
        }

        .i0yps4-step-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--i0yps4-primary);
        }

        /* Comparison Section Layout - Unique Split */
        .i0yps4-feature-split {
            align-items: center;
            gap: 64px;
        }

        .i0yps4-feature-content {
            flex: 1;
            min-width: 350px;
        }

        .i0yps4-feature-visual {
            flex: 1;
            min-width: 350px;
            background: var(--i0yps4-primary);
            padding: 48px;
            border-radius: 24px;
            color: white;
            position: relative;
        }

        .i0yps4-code-block {
            background: #001f3f;
            padding: 24px;
            border-radius: 12px;
            font-family: "Consolas", monospace;
            font-size: 0.9rem;
            overflow-x: auto;
            border-left: 4px solid var(--i0yps4-secondary);
        }

        /* Config Table */
        .i0yps4-table-wrapper {
            margin-top: 40px;
            overflow-x: auto;
            border-radius: 16px;
            border: 1px solid var(--i0yps4-border);
        }

        .i0yps4-config-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .i0yps4-config-table th {
            background: var(--i0yps4-primary);
            color: white;
            padding: 16px 24px;
            font-weight: 600;
        }

        .i0yps4-config-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--i0yps4-border);
            background: white;
        }

        .i0yps4-config-table tr:last-child td {
            border-bottom: none;
        }

        /* CTA Section */
        .i0yps4-cta {
            background: linear-gradient(135deg, var(--i0yps4-primary) 0%, #003366 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
            border-radius: 32px;
            margin: 64px 24px;
        }

        .i0yps4-btn {
            display: inline-block;
            padding: 16px 36px;
            background: var(--i0yps4-secondary);
            color: white;
            text-decoration: none;
            font-weight: 700;
            border-radius: 12px;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 1.1rem;
        }

        .i0yps4-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 20px rgba(243, 146, 0, 0.3);
        }

        /* Footer */
        .i0yps4-footer {
            background: var(--i0yps4-bg-alt);
            padding: 80px 0 40px;
            border-top: 1px solid var(--i0yps4-border);
        }

        .i0yps4-footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 64px;
        }

        .i0yps4-footer-brand h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--i0yps4-primary);
            margin-bottom: 16px;
        }

        .i0yps4-footer-links h4 {
            margin-bottom: 24px;
            font-size: 1.1rem;
            color: var(--i0yps4-text);
        }

        .i0yps4-footer-links ul {
            list-style: none;
        }

        .i0yps4-footer-links li {
            margin-bottom: 12px;
        }

        .i0yps4-footer-links a {
            text-decoration: none;
            color: var(--i0yps4-text-light);
            transition: color 0.2s;
        }

        .i0yps4-footer-links a:hover {
            color: var(--i0yps4-primary);
        }

        .i0yps4-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid var(--i0yps4-border);
            color: var(--i0yps4-text-light);
            font-size: 0.9rem;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .i0yps4-footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .i0yps4-navbar {
                height: auto;
                padding: 16px 0;
            }
            .i0yps4-nav-menu {
                display: none; /* In a real app, this would be a mobile menu */
            }
            .i0yps4-hero {
                padding: 64px 0;
            }
            .i0yps4-feature-split {
                flex-direction: column;
            }
            .i0yps4-footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }