/* AI 페르소나 시스템 */
        .persona-section {
            background: linear-gradient(180deg, #0a0a0a 0%, #000 100%);
            padding: 120px 0;
        }
        
        .persona-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 60px;
        }
        
        .persona-card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 20px;
            padding: 40px 30px;
            text-align: center;
            position: relative;
            overflow: hidden;
            transition: all 0.4s ease;
            cursor: pointer;
        }
        
        .persona-card::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, var(--persona-color, #5b4cff) 0%, transparent 70%);
            opacity: 0.1;
            transition: all 0.5s ease;
        }
        
        .persona-card:hover::before {
            opacity: 0.2;
            transform: scale(1.2);
        }
        
        .persona-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            border-color: var(--persona-color, #5b4cff);
        }
        
        .persona-avatar {
            width: 100px;
            height: 100px;
            background: linear-gradient(135deg, var(--persona-color, #5b4cff) 0%, var(--persona-secondary, #00d4ff) 100%);
            border-radius: 50%;
            margin: 0 auto 25px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            position: relative;
        }
        
        .persona-avatar::after {
            content: '';
            position: absolute;
            width: 120px;
            height: 120px;
            border: 2px solid var(--persona-color, #5b4cff);
            border-radius: 50%;
            opacity: 0.3;
            animation: rotate 10s linear infinite;
        }
        
        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        
        .persona-name {
            font-size: 1.3rem;
            color: #fff;
            font-weight: 700;
            margin-bottom: 10px;
        }
        
        .persona-traits {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
            line-height: 1.6;
        }
        
        .persona-balance {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-size: 0.85rem;
            color: var(--persona-color, #5b4cff);
            font-weight: 600;
        }