body { background-color: #fff8d4; /* 明るく元気な黄色 */ font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; line-height: 1.9; color: #333; padding: 2.5em; } .container { max-width: 760px; background: white; padding: 2.5em; margin: auto; box-shadow: 0 0 12px rgba(0,0,0,0.1); border-radius: 12px; }…