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

        body {
            font-family: 'Helvetica Neue', Arial, 'Yu Gothic', 'Hiragino Kaku Gothic ProN', sans-serif;
            line-height: 1.7;
            color: #333;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            min-height: 100vh;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem 1rem;
        }

        .header {
            text-align: center;
            margin-bottom: 4rem;
            background: white;
            padding: 3rem 2rem;
            border-radius: 20px;
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
            position: relative;
            overflow: hidden;
        }

        .header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #000 0%, #666 50%, #000 100%);
        }

        .header h1 {
            font-size: 2.5rem;
            color: #000;
            margin-bottom: 1rem;
            font-weight: 300;
            letter-spacing: 0.05em;
        }

        .header p {
            color: #666;
            font-size: 1.1rem;
            opacity: 0.8;
        }

        .search-container {
            margin-bottom: 3rem;
            position: relative;
        }

        .search-box {
            width: 100%;
            max-width: 600px;
            margin: 0 auto;
            position: relative;
        }

        .search-input {
            width: 100%;
            padding: 1rem 3rem 1rem 1.5rem;
            border: 2px solid #e2e8f0;
            border-radius: 50px;
            font-size: 1rem;
            background: white;
            transition: all 0.3s ease;
            outline: none;
        }

        .search-input:focus {
            border-color: #000;
            box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.1);
        }

        .search-icon {
            position: absolute;
            right: 1.5rem;
            top: 50%;
            transform: translateY(-50%);
            color: #666;
            font-size: 1.2rem;
        }

        .category-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 2rem;
            background: white;
            padding: 1rem;
            border-radius: 12px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
        }

        .tab-button {
            flex: 1;
            min-width: 150px;
            padding: 1rem 1.5rem;
            background: #f8f9fa;
            color: #666;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.3s ease;
            font-weight: 500;
            text-align: center;
            border: 2px solid transparent;
        }

        .tab-button:hover {
            background: #e9ecef;
            color: #333;
        }

        .tab-button.active {
            background: #000;
            color: white;
            border-color: #000;
        }

        .content-area {
            min-height: 400px;
        }

        .category {
            display: none;
            background: white;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            border: 1px solid #f1f5f9;
        }

        .category.active {
            display: block;
            animation: fadeInUp 0.5s ease forwards;
        }

        .faq-item {
            border-bottom: 1px solid #f1f5f9;
            transition: all 0.3s ease;
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            padding: 1.5rem 2rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: white;
            transition: all 0.3s ease;
        }

        .faq-question:hover {
            background: #f8f9fa;
        }

        .faq-question.active {
            background: #f1f5f9;
            color: #000;
        }

        .question-text {
            font-weight: 500;
            font-size: 1rem;
        }

        .faq-toggle {
            font-size: 1rem;
            transition: transform 0.3s ease;
            color: #666;
        }

        .faq-question.active .faq-toggle {
            transform: rotate(180deg);
            color: #000;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: all 0.4s ease;
            background: #fafbfc;
        }

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

        .answer-content {
            padding: 1.5rem 2rem 2rem;
            color: #4a5568;
            line-height: 1.8;
        }

        .contact-section {
            background: linear-gradient(135deg, #000 0%, #333 100%);
            color: white;
            padding: 3rem 2rem;
            border-radius: 16px;
            text-align: center;
            margin-top: 3rem;
        }

        .contact-section h3 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            font-weight: 400;
        }

        .contact-section p {
            margin-bottom: 2rem;
            opacity: 0.9;
            font-size: 1.1rem;
        }

        .contact-info {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-top: 2rem;
        }

        .contact-item {
            background: rgba(255, 255, 255, 0.1);
            padding: 1.5rem;
            border-radius: 12px;
            backdrop-filter: blur(10px);
        }

        .contact-item h4 {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
        }

        .contact-item p {
            margin: 0;
            font-size: 1rem;
        }

        /* レスポンシブデザイン */
        @media (max-width: 768px) {
            .container {
                padding: 1rem;
            }

            .header {
                padding: 2rem 1rem;
                margin-bottom: 2rem;
            }

            .header h1 {
                font-size: 2rem;
            }

            .categories {
                gap: 1rem;
            }

            .category-tabs {
                flex-direction: column;
                gap: 0.5rem;
            }

            .tab-button {
                min-width: auto;
                padding: 0.8rem 1rem;
            }

            .faq-question {
                padding: 1rem;
            }

            .answer-content {
                padding: 1rem;
            }

            .contact-section {
                padding: 2rem 1rem;
            }

            .contact-info {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
        }

        @media (max-width: 480px) {
            .header h1 {
                font-size: 1.8rem;
            }

            .search-input {
                padding: 0.8rem 2.5rem 0.8rem 1rem;
            }

            .category-title {
                font-size: 1rem;
            }

            .question-text {
                font-size: 0.9rem;
            }
        }

        /* アニメーション */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .category {
            animation: fadeInUp 0.6s ease forwards;
        }

        .category:nth-child(2) {
            animation-delay: 0.1s;
        }

        .category:nth-child(3) {
            animation-delay: 0.2s;
        }

        .category:nth-child(4) {
            animation-delay: 0.3s;
        }

        .hidden {
            display: none;
        }