body { font-family: 'Segoe UI', Arial, sans-serif; line-height: 1.6; color: #333; max-width: 1200px; margin: 0 auto; padding: 20px; }
        .mobile-nav { display: none; }
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-nav { display: block; position: fixed; bottom: 0; left: 0; right: 0; background: #ff4d00; padding: 10px; text-align: center; }
            .mobile-nav button { background: white; border: none; padding: 8px 15px; margin: 0 5px; cursor: pointer; }
        }
        h1 { color: #ff4d00; border-bottom: 3px solid #ff4d00; padding-bottom: 10px; }
        h2 { color: #e67e22; margin-top: 30px; }
        h3 { color: #2980b9; }
        .download-btn, .login-btn { display: inline-block; background: #27ae60; color: white; padding: 12px 25px; margin: 15px 0; text-decoration: none; border-radius: 5px; font-weight: bold; }
        .login-btn { background: #3498db; }
        img { max-width: 100%; height: auto; margin: 20px 0; }
        .tag { background: #f1f1f1; padding: 3px 8px; margin: 5px; display: inline-block; border-radius: 3px; }
        .type-nav a { display: inline-block; margin: 5px; background: #ecf0f1; padding: 5px 10px; }
        footer { margin-top: 50px; padding-top: 20px; border-top: 1px solid #eee; }