* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background: #f8f9fa;
        }
        
        /* ヘッダー */
        header {
            background: #1a1a2e;
            color: white;
            padding: 1rem 0;
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        
        nav {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 2rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            font-size: 1.8rem;
            font-weight: bold;
            background: linear-gradient(45deg, #4A90E2, #7B68EE);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            display: inline-block;
        }
        
        nav ul {
            list-style: none;
            display: flex;
            gap: 2rem;
        }
        
        nav a {
            color: white;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        nav a:hover {
            color: #4A90E2;
        }
        
        .nav-active {
            color: #4A90E2 !important;
            border-bottom: 2px solid #4A90E2;
            padding-bottom: 2px;
        }
        
        /* ページヘッダー */
        .page-header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 6rem 2rem 3rem;
            text-align: center;
            margin-top: 60px;
        }
        
        .page-header h1 {
            font-size: 2.5rem;
            margin-bottom: 0.5rem;
            animation: fadeIn 0.8s ease-out;
        }
        
        .breadcrumb {
            font-size: 0.9rem;
            opacity: 0.8;
            animation: fadeIn 0.8s ease-out 0.2s both;
        }
        
        .breadcrumb a {
            color: white;
            text-decoration: none;
        }
        
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        
        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* メインコンテンツ */
        main {
            max-width: 1000px;
            margin: 3rem auto;
            padding: 0 2rem;
        }
        
        /* 会社概要テーブル */
        .company-overview {
            background: white;
            border-radius: 15px;
            padding: 3rem;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            margin-bottom: 3rem;
        }
        
        .overview-title {
            font-size: 2rem;
            color: #1a1a2e;
            margin-bottom: 2rem;
            text-align: center;
        }
        
        .info-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            overflow: hidden;
            border-radius: 10px;
            box-shadow: 0 0 0 1px #e0e0e0;
        }
        
        .info-row {
            display: grid;
            grid-template-columns: 250px 1fr;
            border-bottom: 1px solid #e0e0e0;
        }
        
        .info-row:last-child {
            border-bottom: none;
        }
        
        .info-label {
            background: #f3f4f6;
            padding: 1.2rem;
            font-weight: bold;
            color: #1a1a2e;
            border-right: 1px solid #e0e0e0;
        }
        
        .info-content {
            padding: 1.2rem;
            background: white;
        }
        
        /* ミッション・ビジョン */
        .mission-vision {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
            margin-bottom: 3rem;
        }
        
        .card {
            background: white;
            padding: 2.5rem;
            border-radius: 15px;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.12);
        }
        
        .card h3 {
            color: #4A90E2;
            font-size: 1.5rem;
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .card h3::before {
            content: '';
            width: 4px;
            height: 24px;
            background: linear-gradient(45deg, #4A90E2, #7B68EE);
            border-radius: 2px;
        }
        
        /* 沿革 */
        .history {
            background: white;
            border-radius: 15px;
            padding: 3rem;
            box-shadow: 0 5px 20px rgba(0,0,0,0.08);
        }
        
        .history-title {
            font-size: 2rem;
            color: #1a1a2e;
            margin-bottom: 2rem;
            text-align: center;
        }
        
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            bottom: 10px;
            width: 2px;
            background: #e0e0e0;
        }
        
        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
            padding-left: 20px;
        }
        
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -29px;
            top: 5px;
            width: 10px;
            height: 10px;
            background: #4A90E2;
            border-radius: 50%;
            box-shadow: 0 0 0 3px white, 0 0 0 5px #e0e0e0;
        }
        
        .timeline-date {
            font-weight: bold;
            color: #4A90E2;
            margin-bottom: 0.5rem;
        }
        
        /* フッター */
        footer {
            background: #1a1a2e;
            color: white;
            text-align: center;
            padding: 2rem;
            margin-top: 4rem;
        }
        
        /* レスポンシブ */
        @media (max-width: 768px) {
            nav ul {
                display: none;
            }
            
            .page-header h1 {
                font-size: 2rem;
            }
            
            .info-row {
                grid-template-columns: 1fr;
            }
            
            .info-label {
                text-align: center;
                border-right: none;
                border-bottom: 1px solid #e0e0e0;
            }
            
            .company-overview {
                padding: 2rem 1.5rem;
            }
            
            .card {
                padding: 2rem 1.5rem;
            }
        }