h2 { color: #1e40af; /* より鮮やかな紺色 */ background: linear-gradient(transparent 70%, #dbeafe 70%); padding: 0.5em 0; margin: 2em 0 1em; font-size: 1.3em; } .point-wrap { background-color: #f0f9ff; border-left: 6px solid #0369a1; padding: 1.2em; margin: 1.5em 0; border-radius: 8px; box-shadow: 0 2px 4px …