body { font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif; line-height: 1.7; color: #333; background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); min-height: 100vh; } .container { max-width: 1200px; margin: 0 auto; padding: 20px; } .main-con…