body { background: #e5f1e2; /* 淡い緑(大地のイメージ) */ font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; color: #222; line-height: 1.9; max-width: 720px; margin: 3em auto; padding: 2.5em; box-shadow: 0 0 15px rgba(0,0,0,0.08); border-radius: 12px; } h1 { font-size: 1.8em; margin-bottom: 1em; tex…