:root {
            --i5tw1i-primary: #FF6C37;
            --i5tw1i-secondary: #0B36E4;
            --i5tw1i-dark: #212121;
            --i5tw1i-light: #FFFFFF;
            --i5tw1i-gray-100: #F8F9FA;
            --i5tw1i-gray-200: #E9ECEF;
            --i5tw1i-gray-800: #343A40;
            --i5tw1i-glass: rgba(255, 255, 255, 0.9);
            --i5tw1i-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--i5tw1i-dark);
            background-color: var(--i5tw1i-light);
            word-break: break-word;
            overflow-x: hidden;
        }

        /* Typography */
        h1, h2, h3, h4 {
            line-height: 1.2;
            font-weight: 800;
            white-space: normal;
        }

        h1 { font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem); }
        h2 { font-size: clamp(1.8rem, 3vw + 0.5rem, 2.8rem); margin-bottom: 32px; }
        h3 { font-size: clamp(1.2rem, 2vw + 0.5rem, 1.8rem); }
        p { font-size: 1.1rem; line-height: 1.8; color: var(--i5tw1i-gray-800); }

        /* Layout Units */
        .i5tw1i-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* Navigation */
        .i5tw1i-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: var(--i5tw1i-glass);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--i5tw1i-gray-200);
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
        }

        .i5tw1i-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
        }

        .i5tw1i-logo {
            min-width: 0;
            flex-shrink: 0;
        }

        .i5tw1i-logo img {
            height: 40px;
            display: block;
        }

        .i5tw1i-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .i5tw1i-nav-item {
            min-width: 0;
        }

        .i5tw1i-nav-link {
            text-decoration: none;
            color: var(--i5tw1i-dark);
            font-weight: 600;
            padding: 8px 16px;
            border-radius: 8px;
            transition: var(--i5tw1i-transition);
            font-size: 0.95rem;
            white-space: nowrap;
        }

        .i5tw1i-nav-link:hover {
            background-color: var(--i5tw1i-gray-100);
            color: var(--i5tw1i-primary);
        }

        .i5tw1i-nav-link.active {
            background-color: var(--i5tw1i-primary);
            color: white;
        }

        /* Hero Documentation Section */
        .i5tw1i-hero-docs {
            padding-top: 160px;
            padding-bottom: 96px;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            position: relative;
            overflow: hidden;
        }

        .i5tw1i-hero-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            align-items: center;
        }

        .i5tw1i-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .i5tw1i-hero-visual {
            flex: 1.2;
            min-width: 320px;
            position: relative;
        }

        .i5tw1i-hero-image-box {
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 30px 60px rgba(0,0,0,0.15);
            transform: perspective(1000px) rotateY(-5deg);
        }

        .i5tw1i-hero-image-box img {
            width: 100%;
            height: auto;
            display: block;
        }

        .i5tw1i-badge {
            display: inline-block;
            background: rgba(255, 108, 55, 0.1);
            color: var(--i5tw1i-primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* Layered Content Section */
        .i5tw1i-layers-section {
            padding: 96px 0;
            background: var(--i5tw1i-light);
        }

        .i5tw1i-layers-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 32px;
            margin-top: 64px;
        }

        .i5tw1i-layer-card {
            background: var(--i5tw1i-gray-100);
            padding: 48px;
            border-radius: 24px;
            transition: var(--i5tw1i-transition);
            border: 1px solid transparent;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .i5tw1i-layer-card:hover {
            background: white;
            border-color: var(--i5tw1i-primary);
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
        }

        .i5tw1i-layer-id {
            font-family: monospace;
            color: var(--i5tw1i-primary);
            font-weight: bold;
            margin-bottom: 16px;
            display: block;
        }

        .i5tw1i-capability-list {
            margin-top: 24px;
            list-style: none;
        }

        .i5tw1i-capability-item {
            padding: 8px 0;
            border-bottom: 1px solid var(--i5tw1i-gray-200);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
        }

        .i5tw1i-capability-item::before {
            content: "✓";
            color: var(--i5tw1i-primary);
            margin-right: 12px;
            font-weight: bold;
        }

        /* Specification Detail Section */
        .i5tw1i-spec-section {
            padding: 96px 0;
            background: var(--i5tw1i-dark);
            color: white;
            overflow: hidden;
        }

        .i5tw1i-spec-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
        }

        .i5tw1i-spec-image {
            flex: 1;
            min-width: 320px;
        }

        .i5tw1i-spec-image img {
            width: 100%;
            border-radius: 16px;
            box-shadow: 0 0 40px rgba(255, 108, 55, 0.3);
        }

        .i5tw1i-spec-text {
            flex: 1;
            min-width: 320px;
        }

        .i5tw1i-spec-text p {
            color: var(--i5tw1i-gray-200);
            margin-bottom: 24px;
        }

        /* Footer */
        .i5tw1i-footer {
            background: var(--i5tw1i-gray-100);
            padding: 64px 0 32px;
            border-top: 1px solid var(--i5tw1i-gray-200);
        }

        .i5tw1i-footer-top {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 48px;
        }

        .i5tw1i-footer-brand {
            max-width: 300px;
            min-width: 0;
        }

        .i5tw1i-brand-name {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--i5tw1i-primary);
            margin-bottom: 16px;
        }

        .i5tw1i-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            min-width: 0;
        }

        .i5tw1i-link-group {
            min-width: 150px;
        }

        .i5tw1i-link-group h4 {
            margin-bottom: 20px;
            font-size: 1rem;
            color: var(--i5tw1i-dark);
        }

        .i5tw1i-link-group ul {
            list-style: none;
        }

        .i5tw1i-link-group a {
            text-decoration: none;
            color: var(--i5tw1i-gray-800);
            display: block;
            margin-bottom: 10px;
            font-size: 0.9rem;
            transition: var(--i5tw1i-transition);
        }

        .i5tw1i-link-group a:hover {
            color: var(--i5tw1i-primary);
            padding-left: 5px;
        }

        .i5tw1i-footer-bottom {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid var(--i5tw1i-gray-200);
            font-size: 0.9rem;
            color: var(--i5tw1i-gray-800);
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .i5tw1i-hero-visual {
                transform: none;
            }
            .i5tw1i-hero-image-box {
                transform: none;
            }
        }

        @media (max-width: 768px) {
            .i5tw1i-nav-wrapper {
                justify-content: center;
            }
            .i5tw1i-nav-menu {
                justify-content: center;
                margin-top: 16px;
            }
            .i5tw1i-hero-docs {
                padding-top: 200px;
                text-align: center;
            }
            .i5tw1i-hero-grid, .i5tw1i-spec-flex {
                flex-direction: column;
            }
            .i5tw1i-layers-grid {
                grid-template-columns: 1fr;
            }
        }