iPhoneマイナカード化 body { font-family: sans-serif; line-height: 1.6; margin: 20px; background-color: #f9f9f9; color: #333; } h1, h2, h3 { color: #1a73e8; } h1 { font-size: 2em; border-bottom: 2px solid #1a73e8; padding-bottom: 10px; margin-bottom: 20px; } h2 { font-size: 1.5em; margin-top: 30px; margin-b…