body { font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; background-color: #e6ecd9; /* 薄いオリーブグリーン */ color: #222; line-height: 1.9; max-width: 760px; margin: 3em auto; padding: 2em; box-shadow: 0 0 12px rgba(0,0,0,0.08); border-radius: 12px; } h1 { font-size: 1.9em; text-align: center; m…