body, html {
            margin: 0;
            padding: 0;
            font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.8;
        }

        .page-header {
            background: linear-gradient(135deg, #001226 0%, #191970 100%);
            color: #ffffff;
            padding: 60px 20px;
            text-align: center;
        }

        .page-header h1 {
            font-size: 2rem;
            margin: 0;
            letter-spacing: 0.1em;
        }

        .container {
            max-width: 800px;
            margin: 50px auto;
            padding: 0 20px;
        }

        .info-card {
            background: white;
            padding: 50px;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

        .info-card h2 {
            font-size: 1.3rem;
            color: #001226;
            border-left: 4px solid #191970;
            padding-left: 15px;
            margin: 40px 0 20px;
        }

        .info-card h2:first-child {
            margin-top: 0;
        }

        .info-card p {
            font-size: 0.95rem;
            margin-bottom: 20px;
            color: #444;
        }

        .info-card ul {
            padding-left: 20px;
            margin-bottom: 20px;
            font-size: 0.95rem;
            color: #444;
        }

        .info-card li {
            margin-bottom: 10px;
        }

        .back-link-container {
            text-align: center;
            margin-top: 40px;
        }

        .back-link {
            display: inline-block;
            color: #191970;
            text-decoration: none;
            font-weight: bold;
            font-size: 0.9rem;
            transition: opacity 0.3s;
        }

        .back-link:hover {
            opacity: 0.7;
        }

        footer {
            background-color: #001f3f;
            color: #ffffff;
            padding: 40px 20px;
            text-align: center;
            font-size: 0.8rem;
            margin-top: 100px;
        }

        @media (max-width: 768px) {
            .info-card {
                padding: 30px 20px;
            }
            .page-header h1 {
                font-size: 1.6rem;
            }
        }