/* --- 基本設定 --- */ body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif; line-height: 1.8; background-color: #f7f9fc; color: #333; margin: 0; padding: 0; } .container { max-width: 800px; margin: 0 auto; background-color: …