body { background-color: #3d7dbf; /* 牛乳石鹸青箱に近い青 */ font-family: "Hiragino Kaku Gothic ProN", Meiryo, sans-serif; color: #fff; line-height: 1.9; padding: 3em 1em; } .container { max-width: 720px; background: #ffffff; color: #222; padding: 2.5em; margin: auto; border-radius: 12px; box-shadow: 0 0 15px…