body { font-family: 'Arial', sans-serif; margin: 20px; } h1 { color: #2E8B57; /* SeaGreen */ } h2 { color: #20B2AA; /* LightSeaGreen */ } p { font-size: 16px; } .summary { background-color: #F0F8FF; /* AliceBlue */ border-left: 5px solid #2E8B57; /* SeaGreen */ padding: 10px; margin-top: 20px; } 忙しい…