body { background-color: #f4fdf0; /* 爽やかな明るいグリーン系 */ 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; } h2 { font-size: 1.2em; text-align: center; font-weight: normal; margin-top: 0; color: #555; } …