body { background: #f7f0e8; /* 温かみのあるベージュ */ font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; color: #333; line-height: 1.9; max-width: 720px; margin: 3em auto; padding: 2.5em; box-shadow: 0 0 12px rgba(0,0,0,0.05); border-radius: 12px; } h1 { font-size: 1.8em; margin-bottom: 1em; text-…