* { margin: 0; padding: 0; box-sizing: border-box; } body { font-family: "Hiragino Kaku Gothic Pro", "ヒラギノ角ゴ Pro W3", Meiryo, sans-serif; line-height: 1.8; color: #333; background-color: #f8f9fa; } .container { max-width: 800px; margin: 0 auto; padding: 20px; background-color: white; box-shadow: 0 0…