:root {
            --color-bg: #0a0a0b;
            --color-bg-elevated: #111113;
            --color-bg-card: #161619;
            --color-border: #27272a;
            --color-border-subtle: #1e1e21;
            --color-text: #fafafa;
            --color-text-muted: #a1a1aa;
            --color-text-subtle: #71717a;
            --color-accent: #00d4aa;
            --color-accent-dim: rgba(0, 212, 170, 0.15);
            --color-accent-glow: rgba(0, 212, 170, 0.4);
            --color-secondary: #6366f1;
            --color-secondary-dim: rgba(99, 102, 241, 0.15);
            --color-tertiary: #f59e0b;
            --color-tertiary-dim: rgba(245, 158, 11, 0.15);
            --font-display: 'DM Sans', system-ui, sans-serif;
            --font-mono: 'Space Mono', monospace;
            --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
            --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-display);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        /* Noise texture overlay */
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            opacity: 0.03;
            z-index: 1000;
            background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
        }

        /* Navigation */
        .nav {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            padding: 1.25rem 2rem;
            background: rgba(10, 10, 11, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border-subtle);
            transition: all 0.3s var(--ease-out);
        }

        .nav-inner {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            text-decoration: none;
            color: var(--color-text);
        }

        .logo-image {
            height: 48px;
            width: auto;
            display: block;
        }

        .logo-text {
            font-weight: 600;
            font-size: 1.25rem;
            letter-spacing: -0.02em;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2.5rem;
        }

        .nav-link {
            color: var(--color-text-muted);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.2s;
            position: relative;
        }

        .nav-link:hover {
            color: var(--color-text);
        }

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 1px;
            background: var(--color-accent);
            transition: width 0.3s var(--ease-out);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.625rem 1.25rem;
            background: var(--color-text);
            color: var(--color-bg);
            text-decoration: none;
            font-size: 0.875rem;
            font-weight: 600;
            border-radius: 8px;
            transition: all 0.2s var(--ease-out);
        }

        .nav-cta:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(250, 250, 250, 0.15);
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 8rem 2rem 6rem;
            position: relative;
            overflow: hidden;
        }

        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            pointer-events: none;
        }

        .hero-gradient {
            position: absolute;
            width: 120%;
            height: 120%;
            top: -40%;
            left: -10%;
            background: radial-gradient(ellipse at 30% 20%, var(--color-accent-dim) 0%, transparent 50%),
                        radial-gradient(ellipse at 70% 60%, var(--color-secondary-dim) 0%, transparent 40%);
            opacity: 0.6;
            animation: float 20s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translate(0, 0) rotate(0deg); }
            33% { transform: translate(20px, -20px) rotate(2deg); }
            66% { transform: translate(-10px, 10px) rotate(-1deg); }
        }

        .hero-grid {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: 
                linear-gradient(var(--color-border-subtle) 1px, transparent 1px),
                linear-gradient(90deg, var(--color-border-subtle) 1px, transparent 1px);
            background-size: 60px 60px;
            mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
            opacity: 0.5;
        }

        .hero-content {
            max-width: 1400px;
            margin: 0 auto;
            position: relative;
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.625rem;
            padding: 0.5rem 1rem;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: 100px;
            font-size: 0.8125rem;
            color: var(--color-text-muted);
            margin-bottom: 2rem;
            animation: fadeUp 0.8s var(--ease-out) forwards;
            opacity: 0;
        }

        .hero-badge-dot {
            width: 6px;
            height: 6px;
            background: var(--color-accent);
            border-radius: 50%;
            animation: pulse 2s ease-in-out infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.2); }
        }

        .hero-title {
            font-size: clamp(3rem, 8vw, 5.5rem);
            font-weight: 700;
            line-height: 1.05;
            letter-spacing: -0.03em;
            margin-bottom: 1.5rem;
            animation: fadeUp 0.8s var(--ease-out) 0.1s forwards;
            opacity: 0;
        }

        .hero-title-accent {
            background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: clamp(1.125rem, 2vw, 1.375rem);
            color: var(--color-text-muted);
            max-width: 680px;
            line-height: 1.7;
            margin-bottom: 2.5rem;
            animation: fadeUp 0.8s var(--ease-out) 0.2s forwards;
            opacity: 0;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
            animation: fadeUp 0.8s var(--ease-out) 0.3s forwards;
            opacity: 0;
        }

        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.625rem;
            padding: 1rem 1.75rem;
            background: var(--color-accent);
            color: var(--color-bg);
            text-decoration: none;
            font-size: 0.9375rem;
            font-weight: 600;
            border-radius: 12px;
            transition: all 0.25s var(--ease-out);
            box-shadow: 0 0 0 0 var(--color-accent-glow);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px var(--color-accent-glow);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.625rem;
            padding: 1rem 1.75rem;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            color: var(--color-text);
            text-decoration: none;
            font-size: 0.9375rem;
            font-weight: 500;
            border-radius: 12px;
            transition: all 0.25s var(--ease-out);
        }

        .btn-secondary:hover {
            background: var(--color-bg-elevated);
            border-color: var(--color-text-subtle);
            transform: translateY(-2px);
        }

        .btn-icon {
            width: 18px;
            height: 18px;
            stroke: currentColor;
            stroke-width: 2;
            fill: none;
        }

        /* What is Fukuii Section */
        .intro-section {
            border-top: 1px solid var(--color-border-subtle);
            background: var(--color-bg-elevated);
            padding: 5rem 2rem;
        }

        .intro-inner {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
        }

        .intro-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-family: var(--font-mono);
            font-size: 0.75rem;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.1em;
            margin-bottom: 1.5rem;
        }

        .intro-title {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 1.5rem;
        }

        .intro-text {
            font-size: 1.0625rem;
            color: var(--color-text-muted);
            line-height: 1.8;
            max-width: 720px;
            margin: 0 auto;
        }

        .intro-text strong {
            color: var(--color-text);
            font-weight: 500;
        }

        /* Section Styling */
        .section {
            padding: 7rem 2rem;
            position: relative;
        }

        .section-inner {
            max-width: 1400px;
            margin: 0 auto;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            font-family: var(--font-mono);
            font-size: 0.75rem;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.1em;
            margin-bottom: 1rem;
        }

        .section-label::before {
            content: '';
            width: 24px;
            height: 1px;
            background: var(--color-accent);
        }

        .section-title {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 700;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 1.5rem;
        }

        .section-desc {
            font-size: 1.125rem;
            color: var(--color-text-muted);
            max-width: 600px;
            line-height: 1.7;
        }

        /* Settlement Focus Section */
        .settlement-section {
            background: var(--color-bg);
        }

        .settlement-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            margin-top: 3rem;
            align-items: center;
        }

        .settlement-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 1rem;
            margin-top: 2rem;
        }

        .settlement-content h3:first-child {
            margin-top: 0;
        }

        .settlement-content p {
            color: var(--color-text-muted);
            line-height: 1.7;
        }

        .settlement-visual {
            position: relative;
            aspect-ratio: 1;
            background: var(--color-bg-card);
            border-radius: 24px;
            border: 1px solid var(--color-border);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .settlement-visual::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 70%, var(--color-accent-dim) 0%, transparent 50%);
        }

        .settlement-diagram {
            width: 80%;
            height: 80%;
            position: relative;
        }

        .settlement-node {
            position: absolute;
            width: 72px;
            height: 72px;
            background: var(--color-bg);
            border: 2px solid var(--color-accent);
            border-radius: 14px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 0.25rem;
            font-family: var(--font-mono);
            font-size: 0.5625rem;
            color: var(--color-text-muted);
            box-shadow: 0 0 40px var(--color-accent-dim);
            animation: nodeGlow 3s ease-in-out infinite;
        }

        @keyframes nodeGlow {
            0%, 100% { box-shadow: 0 0 20px var(--color-accent-dim); }
            50% { box-shadow: 0 0 40px var(--color-accent-glow); }
        }

        .settlement-node:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
        .settlement-node:nth-child(2) { top: 10%; right: 10%; animation-delay: 0.5s; }
        .settlement-node:nth-child(3) { bottom: 10%; left: 10%; animation-delay: 1s; }
        .settlement-node:nth-child(4) { bottom: 10%; right: 10%; animation-delay: 1.5s; }
        .settlement-node:nth-child(5) { top: 50%; left: 50%; transform: translate(-50%, -50%); animation-delay: 0.75s; width: 88px; height: 88px; border-color: var(--color-secondary); }

        .settlement-node-icon {
            width: 22px;
            height: 22px;
            stroke: var(--color-accent);
            stroke-width: 1.5;
            fill: none;
        }

        .settlement-node:nth-child(5) .settlement-node-icon {
            stroke: var(--color-secondary);
            width: 26px;
            height: 26px;
        }

        /* Custody Context Section */
        .context-section {
            background: var(--color-bg-elevated);
            border-top: 1px solid var(--color-border-subtle);
            border-bottom: 1px solid var(--color-border-subtle);
        }

        .context-header {
            text-align: center;
            margin-bottom: 4rem;
        }

        .context-header .section-desc {
            margin: 0 auto;
        }

        .context-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .context-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            padding: 2rem;
            position: relative;
            overflow: hidden;
            transition: all 0.4s var(--ease-out);
        }

        .context-card:hover {
            transform: translateY(-4px);
            border-color: var(--color-border);
        }

        .context-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--card-color);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.4s var(--ease-out);
        }

        .context-card:hover::before {
            transform: scaleX(1);
        }

        .context-card--safekeeping { --card-color: var(--color-secondary); }
        .context-card--settlement { --card-color: var(--color-accent); }
        .context-card--reporting { --card-color: var(--color-tertiary); }

        .context-icon {
            width: 48px;
            height: 48px;
            background: var(--card-color);
            opacity: 0.15;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.25rem;
            position: relative;
        }

        .context-icon::after {
            content: '';
            position: absolute;
            inset: 0;
            border: 1px solid var(--card-color);
            border-radius: inherit;
            opacity: 0.5;
        }

        .context-icon svg {
            width: 24px;
            height: 24px;
            stroke: var(--card-color);
            stroke-width: 1.5;
            fill: none;
            position: relative;
            z-index: 1;
        }

        .context-title {
            font-size: 1.25rem;
            font-weight: 600;
            margin-bottom: 0.75rem;
            letter-spacing: -0.01em;
        }

        .context-desc {
            color: var(--color-text-muted);
            font-size: 0.9375rem;
            line-height: 1.7;
            margin-bottom: 1.25rem;
        }

        .context-note {
            font-size: 0.8125rem;
            color: var(--color-text-subtle);
            font-style: italic;
        }

        .context-badge {
            display: inline-block;
            margin-top: 1rem;
            padding: 0.375rem 0.75rem;
            background: rgba(0, 212, 170, 0.1);
            border: 1px solid rgba(0, 212, 170, 0.3);
            border-radius: 100px;
            font-size: 0.6875rem;
            font-weight: 600;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        /* Features Section */
        .features-section {
            background: var(--color-bg);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
            margin-top: 3rem;
        }

        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: 16px;
            padding: 1.75rem;
            transition: all 0.3s var(--ease-out);
        }

        .feature-card:hover {
            border-color: var(--color-accent);
            transform: translateY(-2px);
        }

        .feature-header {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-bottom: 0.75rem;
        }

        .feature-icon {
            width: 36px;
            height: 36px;
            background: var(--color-accent-dim);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .feature-icon svg {
            width: 18px;
            height: 18px;
            stroke: var(--color-accent);
            stroke-width: 2;
            fill: none;
        }

        .feature-title {
            font-weight: 600;
            font-size: 1rem;
        }

        .feature-desc {
            color: var(--color-text-muted);
            font-size: 0.9375rem;
            line-height: 1.6;
        }

        /* Quick Start Section */
        .quickstart-section {
            background: var(--color-bg-elevated);
            border-top: 1px solid var(--color-border-subtle);
        }

        .quickstart-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 4rem;
            margin-top: 3rem;
            align-items: start;
        }

        .quickstart-content {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .quickstart-item {
            display: flex;
            gap: 1rem;
        }

        .quickstart-num {
            font-family: var(--font-mono);
            font-size: 0.875rem;
            color: var(--color-accent);
            flex-shrink: 0;
            padding-top: 0.125rem;
        }

        .quickstart-item-title {
            font-weight: 600;
            margin-bottom: 0.375rem;
        }

        .quickstart-item-desc {
            color: var(--color-text-muted);
            font-size: 0.9375rem;
            line-height: 1.6;
        }

        .quickstart-visual {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: 16px;
            padding: 1.5rem;
            font-family: var(--font-mono);
            font-size: 0.8125rem;
            overflow: hidden;
        }

        .quickstart-code {
            color: var(--color-text-muted);
            line-height: 1.9;
        }

        .quickstart-code .comment { color: var(--color-text-subtle); }
        .quickstart-code .command { color: var(--color-text); }
        .quickstart-code .flag { color: var(--color-accent); }
        .quickstart-code .arg { color: var(--color-secondary); }

        /* CTA Section */
        .cta-section {
            background: var(--color-bg);
            text-align: center;
        }

        .cta-box {
            background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-elevated) 100%);
            border: 1px solid var(--color-border);
            border-radius: 24px;
            padding: 4rem 2.5rem;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, var(--color-accent-dim) 0%, transparent 40%);
            opacity: 0.5;
        }

        .cta-content {
            position: relative;
            z-index: 1;
        }

        .cta-title {
            font-size: clamp(1.75rem, 4vw, 2.5rem);
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }

        .cta-desc {
            font-size: 1.0625rem;
            color: var(--color-text-muted);
            max-width: 520px;
            margin: 0 auto 2rem;
            line-height: 1.7;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 1rem;
            flex-wrap: wrap;
        }

        /* Footer */
        .footer {
            padding: 4rem 2rem 2rem;
            border-top: 1px solid var(--color-border-subtle);
        }

        .footer-inner {
            max-width: 1400px;
            margin: 0 auto;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 3rem;
            margin-bottom: 4rem;
        }

        .footer-brand p {
            color: var(--color-text-muted);
            font-size: 0.9375rem;
            margin-top: 1rem;
            max-width: 280px;
            line-height: 1.6;
        }

        .footer-column h4 {
            font-size: 0.8125rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--color-text-subtle);
            margin-bottom: 1.25rem;
        }

        .footer-column ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }

        .footer-column a {
            color: var(--color-text-muted);
            text-decoration: none;
            font-size: 0.9375rem;
            transition: color 0.2s;
        }

        .footer-column a:hover {
            color: var(--color-text);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 2rem;
            border-top: 1px solid var(--color-border-subtle);
        }

        .footer-copy {
            font-size: 0.875rem;
            color: var(--color-text-subtle);
        }

        .footer-copy a {
            color: var(--color-text-muted);
            text-decoration: none;
        }

        .footer-copy a:hover {
            color: var(--color-accent);
        }

        .footer-social {
            display: flex;
            gap: 1rem;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: 10px;
            color: var(--color-text-muted);
            transition: all 0.2s;
        }

        .footer-social a:hover {
            background: var(--color-bg-elevated);
            border-color: var(--color-accent);
            color: var(--color-accent);
        }

        .footer-social svg {
            width: 18px;
            height: 18px;
            fill: currentColor;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .settlement-grid,
            .quickstart-grid {
                grid-template-columns: 1fr;
                gap: 3rem;
            }

            .context-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }

            .settlement-visual {
                order: -1;
                aspect-ratio: 16/10;
            }

            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .section {
                padding: 5rem 1.5rem;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 1.5rem;
                text-align: center;
            }
        }