:root {
            --primary: #1e40af;
            --primary-dark: #1e3a8a;
            --accent: #f97316;
            --accent-hover: #ea580c;
            --bg-light: #f8fafc;
            --bg-white: #ffffff;
            --text-dark: #1e293b;
            --text-gray: #64748b;
            --border: #e2e8f0;
        }

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

        header {
            position: sticky;
            top: 0;
            background-color: white;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
            z-index: 1000;
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
        }
        header .cta-button {
            padding: 10px 24px;
            font-size: 14px;
        }
        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--primary);
        }

        .brand-mark {
            width: 30px;
            height: 30px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--primary), #63a3d7);
            box-shadow: 0 8px 18px rgba(31, 94, 145, 0.24);
        }
        body {
            font-family: 'Noto Sans JP', sans-serif;
            color: var(--text-dark);
            line-height: 1.7;
            background: var(--bg-light);
            overflow-x: hidden;
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, #EFF6FF 0%, #DBEAFE 100%);
            color: var(--primary-dark);
            padding: 80px 20px 100px;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            animation: float 20s infinite ease-in-out;
        }

        @keyframes float {
            0%, 100% { transform: translate(0, 0) scale(1); }
            50% { transform: translate(-50px, 50px) scale(1.1); }
        }

        .container {
            max-width: 1200px;
            position: relative;
            margin: 0 auto;
            z-index: 1;
        }

        .hero-content {
            max-width: 700px;
            margin: 0;
            text-align: left;
            animation: fadeInUp 0.8s ease-out;
        }

        .hero-layout {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 40px;
            align-items: center;
        }

        .hero-visual {
            animation: fadeInUp 0.8s ease-out 0.2s backwards;
        }

        .hero-visual img {
            width: 100%;
            height: auto;
            display: block;
            max-width: 520px;
            margin-left: auto;
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .hero-tag {
            display: inline-block;
            background: rgba(255, 255, 255, 0.2);
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(10px);
        }

        h1 {
            font-family: 'Outfit', 'Noto Sans JP', sans-serif;
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
        }

        .hero-subtitle {
            font-size: 20px;
            opacity: 0.95;
            margin-bottom: 40px;
            font-weight: 500;
        }

        .cta-button {
            display: inline-block;
            background: var(--accent);
            color: white;
            padding: 18px 48px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 700;
            font-size: 18px;
            transition: all 0.3s ease;
            box-shadow: 0 10px 30px rgba(249, 115, 22, 0.3);
            border: none;
            cursor: pointer;
        }

        .cta-button:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 15px 40px rgba(249, 115, 22, 0.4);
        }

        .price-tag {
            display: block;
            margin-top: 16px;
            font-size: 16px;
            opacity: 0.9;
        }

        /* Screenshot */
        .hero-image {
            margin-top: 60px;
            animation: fadeInUp 0.8s ease-out 0.2s backwards;
        }

        .screenshot-box {
            background: white;
            border-radius: 16px;
            padding: 20px;
            box-shadow: 0 20px 60px rgba(30, 64, 175, 0.2);
            max-width: 900px;
            margin: 0 auto;
        }

        .screenshot-image {
            width: 100%;
            height: auto;
            border-radius: 8px;
            display: block;
        }

        .screenshot-placeholder {
            background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
            border-radius: 8px;
            padding: 80px 20px;
            text-align: center;
            color: var(--text-gray);
            border: 2px dashed var(--border);
        }

        .screenshot-placeholder svg {
            width: 80px;
            height: 80px;
            margin-bottom: 16px;
            opacity: 0.5;
        }

        /* Problem Section */
        .problem-section {
            background: white;
            padding: 80px 20px;
        }

        .section-title {
            font-family: 'Outfit', 'Noto Sans JP', sans-serif;
            font-size: 36px;
            font-weight: 800;
            text-align: center;
            margin-bottom: 50px;
            color: var(--text-dark);
        }

        .problems-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .problem-card {
            background: var(--bg-light);
            padding: 32px;
            border-radius: 12px;
            border-left: 4px solid var(--accent);
            transition: transform 0.3s ease;
        }

        .problem-card:hover {
            transform: translateY(-5px);
        }

        .problem-icon {
            font-size: 40px;
            margin-bottom: 16px;
        }

        .problem-title {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .problem-text {
            color: var(--text-gray);
            font-size: 15px;
        }

        /* How It Works */
        .how-section {
            background: var(--bg-light);
            padding: 80px 20px;
        }

        .steps {
            max-width: 900px;
            margin: 0 auto;
        }

        .how-intro-image {
            max-width: 960px;
            margin: 0 auto 40px;
            background: var(--bg-white);
            border-radius: 16px;
            padding: 16px;
            box-shadow: 0 12px 30px rgba(30, 64, 175, 0.12);
        }

        .how-intro-image img {
            width: 100%;
            height: auto;
            display: block;
            border-radius: 10px;
        }

        .how-section .cta-button {
            display: block;
            width: fit-content;
            margin: 10px auto 0;
        }

        .step {
            display: flex;
            gap: 30px;
            margin-bottom: 50px;
            align-items: center;
            animation: fadeInUp 0.6s ease-out backwards;
        }

        .step:nth-child(1) { animation-delay: 0.1s; }
        .step:nth-child(2) { animation-delay: 0.2s; }
        .step:nth-child(3) { animation-delay: 0.3s; }

        .step-number {
            flex-shrink: 0;
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: 'Outfit', sans-serif;
            font-size: 32px;
            font-weight: 800;
            box-shadow: 0 10px 30px rgba(30, 64, 175, 0.2);
        }

        .step-content h3 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .step-content p {
            color: var(--text-gray);
            font-size: 16px;
        }

        /* Features */
        .features-section {
            background: white;
            padding: 80px 20px;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            max-width: 1100px;
            margin: 0 auto;
        }

        .feature-card {
            padding: 32px;
            border-radius: 12px;
            background: var(--bg-light);
            transition: all 0.3s ease;
            border: 2px solid transparent;
        }

        .feature-card:hover {
            border-color: var(--primary);
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(30, 64, 175, 0.1);
        }

        .feature-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary) 0%, #3b82f6 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 24px;
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .feature-card p {
            color: var(--text-gray);
            font-size: 15px;
            line-height: 1.6;
        }

        /* Use Cases */
        .usecase-section {
            background: var(--bg-light);
            padding: 80px 20px;
        }

        .usecase-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .usecase-card {
            background: white;
            padding: 36px;
            border-radius: 16px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
        }

        .usecase-card h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--primary);
        }

        .usecase-card p {
            color: var(--text-gray);
            margin-bottom: 16px;
            font-size: 15px;
        }

        .usecase-example {
            background: var(--bg-light);
            padding: 20px;
            border-radius: 8px;
            border-left: 3px solid var(--accent);
            font-size: 14px;
            color: var(--text-dark);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-section {
            background: white;
            padding: 80px 20px;
        }

        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--bg-light);
            margin-bottom: 16px;
            border-radius: 12px;
            overflow: hidden;
            border: 2px solid transparent;
            transition: all 0.3s ease;
        }

        .faq-item:hover {
            border-color: var(--primary);
        }

        .faq-question {
            padding: 24px 28px;
            font-weight: 700;
            font-size: 18px;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-question::after {
            content: '+';
            font-size: 28px;
            color: var(--primary);
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-question::after {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
        }

        .faq-answer-content {
            padding: 0 28px 24px;
            color: var(--text-gray);
            line-height: 1.7;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            color: white;
            padding: 80px 20px;
            text-align: center;
        }

        .cta-section h2 {
            font-family: 'Outfit', 'Noto Sans JP', sans-serif;
            font-size: 40px;
            font-weight: 800;
            margin-bottom: 24px;
        }

        .cta-section p {
            font-size: 20px;
            margin-bottom: 40px;
            opacity: 0.95;
        }

        /* Footer */
        footer {
            background: var(--text-dark);
            color: white;
            padding: 40px 20px;
            text-align: center;
        }

        footer p {
            opacity: 0.7;
            font-size: 14px;
        }

        /* Responsive */
        @media (max-width: 768px) {
            h1 {
                font-size: 36px;
            }

            .hero-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .hero-content {
                margin: 0 auto;
                text-align: center;
            }

            .hero-visual img {
                margin: 0 auto;
                max-width: 440px;
            }

            .hero-subtitle {
                font-size: 18px;
            }

            .section-title {
                font-size: 28px;
            }

            .step {
                flex-direction: column;
                text-align: center;
            }

            .step-number {
                width: 60px;
                height: 60px;
                font-size: 24px;
            }

            .cta-section h2 {
                font-size: 32px;
            }
        }

        /* Highlight boxes */
        .highlight-box {
            background: #fef3c7;
            border-left: 4px solid #f59e0b;
            padding: 20px 24px;
            border-radius: 8px;
            margin: 24px 0;
        }

        .highlight-box strong {
            color: #92400e;
        }

        .security-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(34, 197, 94, 0.1);
            color: #166534;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-top: 16px;
        }