* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', 'Meiryo', sans-serif;
        }
        
        body {
            background-color: #fef7e5;
            color: #333;
            line-height: 1.6;
            padding: 5px 0;
            display: flex;
            justify-content: center;
        }
        
        .container {
            width: 100%;
            max-width: 700px;
            margin: 0 auto;
            background: #fff;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        .header {
            background: linear-gradient(135deg, #e60012 0%, #ff9900 100%);
            color: white;
            padding: 30px 20px;
            text-align: center;
            position: relative;
        }
        
        .header h1 {
            font-size: 24px;
            margin-bottom: 10px;
            font-weight: bold;
        }
        
        .header p {
            font-size: 16px;
            opacity: 0.9;
        }
        
        .content {
            padding: 30px 25px;
        }
        
        .intro {
            margin-bottom: 25px;
            padding: 20px;
            background-color: #fff9e6;
            border-left: 0px solid #ff9900;
            border-radius: 0 8px 8px 0;
        }
        
        .intro p {
            margin-bottom: 15px;
        }
        
        .book-section {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 25px;
            padding: 20px;
            background-color: #fff5f5;
            border-radius: 10px;
            border: 2px solid #e60012;
        }
        
        .book-cover {
            flex: 1;
            min-width: 200px;
            text-align: center;
        }
        
        .book-cover img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.2);
        }
        
        .book-details {
            flex: 2;
            min-width: 300px;
        }
        
        .book-details h2 {
            color: #e60012;
            font-size: 20px;
            margin-bottom: 15px;
            font-weight: bold;
        }
        
        .book-info {
            margin-bottom: 15px;
        }
        
        .book-info p {
            margin-bottom: 8px;
        }
        
        .book-features {
            margin-top: 15px;
        }
        
        .book-features h3 {
            color: #e60012;
            font-size: 16px;
            margin-bottom: 10px;
        }
        
        .book-features ul {
            list-style-type: none;
            padding-left: 0;
        }
        
        .book-features li {
            padding: 5px 0;
            padding-left: 25px;
            position: relative;
        }
        
        .book-features li:before {
            content: "✓";
            color: #e60012;
            font-weight: bold;
            position: absolute;
            left: 0;
        }
        
        .benefits {
            background-color: #fff9e6;
            border: 2px solid #ff9900;
            border-radius: 10px;
            padding: 25px;
            margin-bottom: 25px;
        }
        
        .benefits h2 {
            color: #e60012;
            font-size: 20px;
            margin-bottom: 15px;
            text-align: center;
            font-weight: bold;
        }
        
        .benefits ul {
            list-style-type: none;
            padding-left: 0;
        }
        
        .benefits li {
            padding: 10px 0;
            padding-left: 30px;
            position: relative;
        }
        
        .benefits li:before {
            content: "✓";
            color: #e60012;
            font-weight: bold;
            position: absolute;
            left: 0;
        }
        
        .cta {
            text-align: center;
            padding: 20px;
            background: linear-gradient(135deg, #e60012 0%, #ff9900 100%);
            color: white;
            border-radius: 10px;
            margin-top: 20px;
        }
        
        .cta h2 {
            font-size: 22px;
            margin-bottom: 15px;
            font-weight: bold;
        }
        
        .cta p {
            margin-bottom: 20px;
            font-size: 16px;
        }
        
        .btn {
            display: inline-block;
            background-color: #fff;
            color: #e60012;
            padding: 15px 30px;
            font-size: 18px;
            font-weight: bold;
            text-decoration: none;
            border-radius: 50px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 10px rgba(0,0,0,0.2);
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 15px rgba(0,0,0,0.3);
        }
        
        .emoji {
            font-size: 24px;
            margin-right: 8px;
            vertical-align: middle;
        }
        
        .stars {
            color: #ff9900;
            margin: 10px 0;
        }
        
        .author {
            display: flex;
            align-items: center;
            margin-top: 15px;
            padding-top: 15px;
            border-top: 1px dashed #e60012;
        }
        
        .author-img {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background-color: #ff9900;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            color: white;
            font-size: 24px;
        }
        
        .author-info h4 {
            color: #e60012;
            margin-bottom: 5px;
        }
        
        @media (max-width: 480px) {
            .container {
                border-radius: 0;
                box-shadow: none;
            }
            
            .header, .content {
                padding: 20px 15px;
            }
            
            .header h1 {
                font-size: 20px;
            }
            
            .cta h2 {
                font-size: 19px;
            }
            
            .btn {
                padding: 12px 25px;
                font-size: 16px;
            }
            
            .book-section {
                flex-direction: column;
            }
        }