:root {
            --primary: #00a0f7;
            --dark: #000;
            --light: #fff;
            --gray: #f4f4f4;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            margin: 0;
            background: #eef2f3 url('/assets/배경화면.jpg') fixed center/cover;
            color: #333;
        }
        .container { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
        header { background: rgba(0,0,0,0.8); padding: 20px 0; color: white; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; }
        .logo img { max-height: 60px; }
        nav ul { display: flex; list-style: none; gap: 20px; margin: 0; padding: 0; }
        nav a { color: white; text-decoration: none; font-weight: bold; }
        .hero { padding: 60px 0; text-align: center; color: white; background: rgba(0, 160, 247, 0.7); border-radius: 8px; margin: 20px 0; }
        .banner-main { display: flex; gap: 20px; margin-top: 20px; }
        .banner { flex: 1; background: #ddd; min-height: 200px; border-radius: 8px; overflow: hidden; }
        .banner img { width: 100%; height: 100%; object-fit: cover; }
        footer { background: var(--dark); color: white; text-align: center; padding: 40px; margin-top: 50px; }
        @media (max-width: 768px) {
            .banner-main { flex-direction: column; }
            nav ul { display: none; } /* Simplified mobile view */
        }