body { background-color: #d5eecb; /* 若草色 */ font-family: "Hiragino Kaku Gothic ProN", sans-serif; padding: 2em; line-height: 1.9; } h1 { font-size: 2em; text-align: center; margin-bottom: 0.3em; } .intro { font-size: 0.9em; text-align: center; color: #444; margin-bottom: 2.2em; line-height: 1.6; } .…