    <style>
        /* ── Design Tokens ────────────────────── */
        :root {
            --primary: #0B4F3A;
            --secondary: #00D3A2;
            --text-dark: #333333;
            --text-gray: #666666;
            --bg-light: #FFFFFF;
            --bg-offwhite: #F8FAF9;
            --border-color: rgba(0, 0, 0, 0.05);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            color: var(--text-dark);
            line-height: 1.8;
            background-color: var(--bg-light);
            font-family: 'Inter', 'Noto Sans JP', sans-serif;
            -webkit-font-smoothing: antialiased;
        }

        h1, h2, h3, h4, h5 {
            line-height: 1.4;
            font-family: 'Inter', 'IBM Plex Sans JP', sans-serif;
            color: var(--primary);
        }

        /* ── EPC Notice Bar ──────────────────────── */
        .epc-notice-bar {
            background-color: var(--primary);
            color: white;
            text-align: center;
            padding: 0.5rem;
            font-size: 0.85rem;
            font-family: 'Inter', 'Noto Sans JP', sans-serif;
        }
        .epc-notice-bar a {
            color: var(--secondary);
            text-decoration: underline;
            font-weight: 700;
            margin-left: 0.5rem;
        }
        .epc-notice-bar a:hover {
            color: #ffffff;
        }

        /* ── Header ──────────────────────────────── */
        header {
            position: sticky;
            top: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(12px);
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1.5rem 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .logo-img {
            height: 32px;
            width: auto;
            display: block;
        }

        .nav-links {
            display: flex;
            gap: 2.5rem;
            align-items: center;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.3s;
            font-family: 'Inter', sans-serif;
        }
        .nav-links a:hover, .nav-links a.active {
            color: var(--secondary);
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            background: none;
            border: none;
            z-index: 1100;
        }
        .hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        /* Mobile nav overlay */
        .mobile-nav {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(16px);
            z-index: 1050;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2.5rem;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        .mobile-nav.open {
            display: flex;
            opacity: 1;
        }
        .mobile-nav a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 700;
            font-size: 1.5rem;
            font-family: 'IBM Plex Sans JP', sans-serif;
            transition: color 0.2s;
        }

        .btn-primary {
            background-color: var(--secondary);
            color: var(--primary);
            padding: 1rem 2rem;
            border-radius: 8px;
            text-decoration: none;
            font-weight: 700;
            transition: all 0.3s ease;
            display: inline-block;
            font-family: 'Inter', 'IBM Plex Sans JP', sans-serif;
            text-align: center;
            box-shadow: 0 4px 15px rgba(0, 211, 162, 0.2);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 211, 162, 0.3);
            background-color: #0BE2B2;
        }

        /* ── Split Hero Section ──────────────────── */
        .hero-split {
            display: flex;
            min-height: 85vh;
            background-color: var(--bg-light);
            position: relative;
            overflow: hidden;
        }
        .hero-content {
            flex: 1;
            padding: 6rem 4rem 6rem 10%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            z-index: 2;
        }
        .hero-visual {
            flex: 1;
            background: url('tokyo-sunrise-hero.png') center center / cover no-repeat;
            position: relative;
            overflow: hidden;
        }

        .hero-label {
            display: inline-block;
            background: rgba(0, 211, 162, 0.1);
            color: var(--primary);
            padding: 0.5rem 1.5rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
            width: fit-content;
        }
        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 1.5rem;
            letter-spacing: -0.02em;
        }
        .hero-content p {
            font-size: 1.1rem;
            color: var(--text-gray);
            margin-bottom: 3rem;
        }
        .hero-cta {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            align-items: flex-start;
        }

        /* ── Sections ────────────────────────────── */
        .section-padding {
            padding: 8rem 2rem;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .section-header {
            text-align: center;
            margin-bottom: 4rem;
        }
        .section-header h2 {
            font-size: 2.2rem;
            margin-bottom: 1rem;
        }
        .section-header p {
            color: var(--text-gray);
            font-size: 1.1rem;
            line-height: 1.8;
        }

        /* ── Vertical Tabs ───────────────────────── */
        .pain-section {
            background: var(--bg-offwhite);
        }
        .vertical-tabs-container {
            display: flex;
            flex-direction: column;
            gap: 2rem;
            max-width: 1000px;
            margin: 0 auto;
        }
        .tab-buttons {
            display: flex;
            flex-direction: column;
            gap: 1rem;
            flex: 0 0 300px;
        }
        .tab-btn {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 1.5rem;
            border-radius: 12px;
            text-align: left;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 700;
            color: var(--text-gray);
            font-size: 1.1rem;
            font-family: 'IBM Plex Sans JP', sans-serif;
            position: relative;
            overflow: hidden;
        }
        .tab-btn::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 4px;
            background: transparent;
            transition: all 0.3s;
        }
        .tab-btn:hover {
            border-color: var(--secondary);
            color: var(--primary);
        }
        .tab-btn.active {
            background: white;
            color: var(--primary);
            border-color: white;
            box-shadow: 0 10px 30px rgba(11, 79, 58, 0.08);
        }
        .tab-btn.active::before {
            background: var(--secondary);
        }

        .tab-content-wrapper {
            flex: 1;
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 3rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            position: relative;
        }
        .tab-panel {
            display: none;
            animation: fadeIn 0.4s ease;
        }
        .tab-panel.active {
            display: block;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .tab-panel h3 {
            font-size: 1.8rem;
            margin-bottom: 2rem;
            color: var(--primary);
        }
        .pain-list {
            margin-bottom: 2.5rem;
            padding-left: 1.5rem;
            color: var(--text-dark);
        }
        .pain-list li {
            margin-bottom: 1rem;
            font-size: 1.05rem;
            position: relative;
        }
        .pain-list li::marker {
            color: var(--secondary);
        }
        .tab-panel p {
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
        }

        /* ── Proposal Frameworks ─────────────────── */
        .framework-section {
            background: var(--bg-light);
        }
        .framework-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2rem;
            max-width: 1000px;
            margin: 0 auto;
        }
        @media (min-width: 768px) {
            .framework-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        .framework-card {
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 3rem 2.5rem;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
            transition: transform 0.3s, box-shadow 0.3s;
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .framework-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(11, 79, 58, 0.08);
            border-color: rgba(0, 211, 162, 0.3);
        }
        .framework-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--secondary);
        }
        .framework-card h3 {
            font-size: 1.4rem;
            margin-bottom: 1.5rem;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }
        .framework-card h3 span {
            background: rgba(0, 211, 162, 0.1);
            color: var(--primary);
            padding: 0.3rem 0.8rem;
            border-radius: 50px;
            font-size: 0.85rem;
            font-family: 'Inter', sans-serif;
            font-weight: 700;
        }
        .framework-list {
            list-style: none;
            margin-bottom: 2rem;
            flex: 1;
        }
        .framework-list li {
            position: relative;
            padding-left: 1.8rem;
            margin-bottom: 1rem;
            font-size: 1.05rem;
            color: var(--text-dark);
            line-height: 1.6;
        }
        .framework-list li::before {
            content: '✓';
            position: absolute;
            left: 0;
            top: 0;
            color: var(--secondary);
            font-weight: 700;
        }
        .framework-card p.note {
            font-size: 0.9rem;
            color: var(--text-gray);
            background: var(--bg-offwhite);
            padding: 1rem;
            border-radius: 8px;
            margin-top: auto;
            margin-bottom: 0;
        }

        /* ── Disclaimer ──────────────────────────── */
        .disclaimer-section {
            background: var(--bg-offwhite);
            padding: 4rem 2rem;
            border-top: 1px solid var(--border-color);
        }
        .disclaimer-box {
            max-width: 900px;
            margin: 0 auto;
        }

        /* ── CTA Strip ───────────────────────────── */
        .cta-strip {
            background: var(--primary);
            padding: 6rem 2rem;
            text-align: center;
        }
        .cta-strip h2 {
            color: white;
            font-size: 2.2rem;
            margin-bottom: 1rem;
        }
        .cta-strip p {
            color: rgba(255,255,255,0.8);
            margin-bottom: 3rem;
        }

        /* ── Footer ──────────────────────────────── */
        footer {
            background-color: #062a1d;
            color: rgba(255, 255, 255, 0.6);
            padding: 6rem 2rem 3rem;
            font-size: 0.95rem;
        }
        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 4rem;
            margin-bottom: 4rem;
        }
        .footer-logo {
            font-family: 'IBM Plex Sans JP', sans-serif;
            font-size: 1.4rem;
            font-weight: 700;
            color: white;
            display: block;
            margin-bottom: 1.5rem;
        }
        .footer-links h4 {
            color: white;
            margin-bottom: 1.5rem;
            font-family: 'Inter', sans-serif;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links li {
            margin-bottom: 1rem;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: var(--secondary);
        }
        .copyright {
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 3rem;
            font-family: 'Inter', sans-serif;
        }

        /* ── Responsive ──────────────────────────── */
        @media (min-width: 768px) {
            .vertical-tabs-container {
                flex-direction: row;
                align-items: flex-start;
            }
        }
        @media (max-width: 900px) {
            .hero-split {
                flex-direction: column;
            }
            .hero-content {
                padding: 4rem 2rem;
            }
            .hero-visual {
                min-height: 400px;
            }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .hamburger { display: flex; }
            .hero-content h1 { font-size: 2.2rem; }
            .section-header h2 { font-size: 1.8rem; }
            .tab-buttons {
                flex-direction: row;
                flex-wrap: wrap;
                flex: none;
            }
            .tab-btn {
                flex: 1;
                text-align: center;
                padding: 1rem;
            }
            .tab-btn::before {
                left: 0;
                top: auto;
                bottom: 0;
                width: 100%;
                height: 4px;
            }
            .tab-content-wrapper {
                padding: 2rem 1.5rem;
            }
            .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
            .epc-notice-bar { font-size: 0.75rem; }
        }
    </style>