* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Yu Gothic Medium', 'Meiryo', sans-serif;
            line-height: 1.8;
            color: #333;
            background: #fafafa;
        }

        /* ヘッダー */
        .header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            transition: all 0.3s ease;
        }

        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 2rem;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 300;
            color: #2c3e50;
            letter-spacing: 2px;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 3rem;
        }

        .nav-menu a {
            color: #555;
            text-decoration: none;
            font-weight: 300;
            font-size: 0.95rem;
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #4CAF50, #2196F3, #FF9800);
            transition: width 0.3s ease;
        }

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

        .nav-menu a:hover {
            color: #2c3e50;
        }

        /* メインコンテンツ */
        .main-content {
            margin-top: 100px;
        }

        /* ヒーローセクション */
        .hero {
            min-height: 80vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            position: relative;
            background: linear-gradient(135deg, rgba(76, 175, 80, 0.05) 0%, rgba(33, 150, 243, 0.05) 50%, rgba(255, 152, 0, 0.05) 100%);
        }

        .hero-content {
            max-width: 800px;
            padding: 0 2rem;
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 200;
            color: #2c3e50;
            margin-bottom: 2rem;
            letter-spacing: 3px;
            animation: fadeInUp 1s ease-out;
        }

        .hero .subtitle {
            font-size: 1.3rem;
            color: #666;
            font-weight: 300;
            margin-bottom: 3rem;
            animation: fadeInUp 1s ease-out 0.3s both;
        }

        .hero .description {
            font-size: 1rem;
            color: #777;
            line-height: 2;
            max-width: 600px;
            margin: 0 auto 3rem;
            animation: fadeInUp 1s ease-out 0.6s both;
        }

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

        /* セクション共通スタイル */
        .section {
            padding: 6rem 0;
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 2rem;
            padding-right: 2rem;
        }

        .section-title {
            font-size: 2.5rem;
            font-weight: 200;
            text-align: center;
            margin-bottom: 4rem;
            color: #2c3e50;
            letter-spacing: 2px;
            position: relative;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, #4CAF50, #2196F3, #FF9800);
            border-radius: 2px;
        }

        /* キーワードセクション */
        .keywords {
            background: white;
            border-top: 1px solid rgba(0,0,0,0.05);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .keywords-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 4rem;
            margin-top: 4rem;
        }

        .keyword-card {
            text-align: center;
            padding: 3rem 2rem;
            transition: all 0.3s ease;
            border-radius: 8px;
            position: relative;
        }

        .keyword-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }

        .keyword-icon {
            font-size: 3rem;
            margin-bottom: 2rem;
            opacity: 0.8;
        }

        .keyword-card h3 {
            font-size: 1.5rem;
            font-weight: 300;
            margin-bottom: 1.5rem;
            color: #2c3e50;
            letter-spacing: 1px;
        }

        .keyword-card p {
            color: #666;
            line-height: 1.8;
            font-size: 0.95rem;
        }

        .keyword-card.ai {
            background: linear-gradient(135deg, rgba(76, 175, 80, 0.03), rgba(76, 175, 80, 0.08));
        }

        .keyword-card.automation {
            background: linear-gradient(135deg, rgba(33, 150, 243, 0.03), rgba(33, 150, 243, 0.08));
        }

        .keyword-card.community {
            background: linear-gradient(135deg, rgba(255, 152, 0, 0.03), rgba(255, 152, 0, 0.08));
        }

        /* コンテンツセクション */
        .content-section {
            background: linear-gradient(135deg, rgba(76, 175, 80, 0.02), rgba(33, 150, 243, 0.02));
        }

        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
            margin-top: 4rem;
        }

        .content-card {
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0,0,0,0.05);
            transition: all 0.3s ease;
            border: 1px solid rgba(0,0,0,0.05);
        }

        .content-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.1);
        }

        .content-card-header {
            padding: 2rem 1.5rem 1rem;
            text-align: center;
            position: relative;
            background: white;
        }

        .content-card-header h3 {
            font-size: 1.3rem;
            font-weight: 300;
            color: #2c3e50;
            margin-bottom: 0.5rem;
        }

        .content-card-body {
            padding: 0 2rem 2rem;
        }

        .content-card ul {
            list-style: none;
            padding-left: 0;
        }

        .content-card li {
            padding: 0.8rem 0;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            position: relative;
            padding-left: 1.5rem;
            color: #666;
            font-size: 0.95rem;
            transition: color 0.3s ease;
        }

        .content-card li:last-child {
            border-bottom: none;
        }

        .content-card li:before {
            content: '・';
            position: absolute;
            left: 0;
            color: #4CAF50;
            font-weight: bold;
        }

        .content-card li:hover {
            color: #2c3e50;
        }

        .content-card.ai li:before { color: #4CAF50; }
        .content-card.automation li:before { color: #2196F3; }
        .content-card.community li:before { color: #FF9800; }
        .content-card.profile li:before { color: #9C27B0; }

        /* コミュニティセクション */
        .community {
            background: white;
            text-align: center;
        }

        .community-content {
            max-width: 600px;
            margin: 0 auto;
        }

        .community .description {
            font-size: 1.1rem;
            color: #666;
            line-height: 2;
            margin-bottom: 3rem;
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-top: 3rem;
        }

        .social-link {
            display: inline-block;
            padding: 1rem 2.5rem;
            background: white;
            color: #2c3e50;
            text-decoration: none;
            border-radius: 50px;
            border: 2px solid rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            font-weight: 300;
            font-size: 0.95rem;
        }

        .social-link:hover {
            background: #2c3e50;
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
        }

        .social-link.line:hover { background: #00B900; border-color: #00B900; }
        .social-link.youtube:hover { background: #FF0000; border-color: #FF0000; }
        .social-link.facebook:hover { background: #1877F2; border-color: #1877F2; }

        /* 特徴セクション */
        .features {
            background: rgba(248, 249, 250, 0.5);
            padding: 6rem 0;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 3rem;
            margin-top: 4rem;
        }

        .feature-item {
            text-align: center;
            padding: 2rem;
        }

        .feature-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 2rem;
            background: linear-gradient(135deg, #4CAF50, #2196F3);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: white;
        }

        .feature-item h3 {
            font-size: 1.3rem;
            font-weight: 300;
            color: #2c3e50;
            margin-bottom: 1rem;
        }

        .feature-item p {
            color: #666;
            line-height: 1.8;
        }

        /* フッター */
        .footer {
            background: #2c3e50;
            color: #ecf0f1;
            padding: 4rem 0 2rem;
            text-align: center;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 3rem;
            margin-bottom: 3rem;
        }

        .footer-links a {
            color: #bdc3c7;
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 300;
            transition: color 0.3s ease;
        }

        .footer-links a:hover {
            color: white;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 2rem;
            font-size: 0.85rem;
            color: #95a5a6;
        }

        /* レスポンシブ */
        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }
            
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .hero .subtitle {
                font-size: 1.1rem;
            }
            
            .social-links {
                flex-direction: column;
                align-items: center;
                gap: 1rem;
            }
            
            .keywords-grid,
            .content-grid,
            .features-grid {
                grid-template-columns: 1fr;
            }

            .section {
                padding: 4rem 1rem;
            }

            .footer-links {
                flex-direction: column;
                gap: 1rem;
            }
        }

        /* アニメーション */
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.8s ease;
        }

        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ハンバーガーメニュー */
        .menu-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 4px;
        }

        .menu-toggle span {
            width: 25px;
            height: 2px;
            background: #2c3e50;
            transition: all 0.3s ease;
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: flex;
            }
        }

        /* ページ切り替え */
        .page {
            display: none;
        }

        .page.active {
            display: block;
        }

        /* 詳細ページスタイル */
        .page-header {
            background: linear-gradient(135deg, rgba(76, 175, 80, 0.05) 0%, rgba(33, 150, 243, 0.05) 50%, rgba(255, 152, 0, 0.05) 100%);
            padding: 8rem 0 4rem;
            text-align: center;
            margin-top: 100px;
        }

        .page-title {
            font-size: 3rem;
            font-weight: 200;
            color: #2c3e50;
            margin-bottom: 1rem;
            letter-spacing: 2px;
        }

        .page-subtitle {
            font-size: 1.2rem;
            color: #666;
            font-weight: 300;
        }

        .page-content {
            max-width: 900px;
            margin: 0 auto;
            padding: 4rem 2rem;
            line-height: 1.8;
        }

        .page-content h2 {
            font-size: 2rem;
            font-weight: 300;
            color: #2c3e50;
            margin: 3rem 0 1.5rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #eee;
        }

        .page-content h3 {
            font-size: 1.5rem;
            font-weight: 300;
            color: #2c3e50;
            margin: 2rem 0 1rem;
        }

        .page-content p {
            margin-bottom: 1.5rem;
            color: #555;
        }

        .page-content ul {
            margin-bottom: 2rem;
            padding-left: 2rem;
        }

        .page-content li {
            margin-bottom: 0.8rem;
            color: #666;
        }

        .feature-box {
            background: white;
            border: 1px solid #eee;
            border-radius: 8px;
            padding: 2rem;
            margin: 2rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }

        .feature-box h4 {
            color: #2c3e50;
            font-size: 1.3rem;
            font-weight: 300;
            margin-bottom: 1rem;
        }

        .code-block {
            background: #f8f9fa;
            border: 1px solid #e9ecef;
            border-radius: 4px;
            padding: 1.5rem;
            margin: 1.5rem 0;
            font-family: 'Courier New', monospace;
            font-size: 0.9rem;
            color: #495057;
            overflow-x: auto;
        }

        .contact-form {
            max-width: 600px;
            margin: 0 auto;
        }

        .form-group {
            margin-bottom: 2rem;
        }

        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            color: #2c3e50;
            font-weight: 300;
        }

        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 1rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 1rem;
            transition: border-color 0.3s ease;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #4CAF50;
        }

        .btn {
            background: linear-gradient(135deg, #4CAF50, #2196F3);
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 50px;
            font-size: 1rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.15);
        }

        .login-container {
            max-width: 400px;
            margin: 4rem auto;
            background: white;
            padding: 3rem;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            text-align: center;
        }

        .login-btn {
            background: #00B900;
            color: white;
            border: none;
            padding: 1rem 2rem;
            border-radius: 4px;
            font-size: 1rem;
            cursor: pointer;
            width: 100%;
            margin-top: 1rem;
        }

        .login-btn:hover {
            background: #009900;
        }