/* 17가지 시스템 쇼케이스 섹션 */
        .systems-showcase {
            background: linear-gradient(180deg, #000 0%, #0a0a0a 50%, #000 100%);
            position: relative;
            padding: 120px 0;
            overflow: hidden;
        }
        
        .systems-showcase::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 20% 50%, rgba(91, 76, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%);
            animation: gradient-shift 15s ease-in-out infinite;
        }
        
        /* 3D 카드 캐러셀 */
        .systems-carousel {
            position: relative;
            height: 600px;
            margin: 80px 0;
            perspective: 1200px;
        }
        
        .carousel-track {
            position: absolute;
            width: 100%;
            height: 100%;
            transform-style: preserve-3d;
            animation: rotate-carousel 30s linear infinite;
        }
        
        @keyframes rotate-carousel {
            from { transform: rotateY(0deg); }
            to { transform: rotateY(-360deg); }
        }
        
        .system-feature-card {
            position: absolute;
            width: 320px;
            height: 420px;
            left: 50%;
            top: 50%;
            margin-left: -160px;
            margin-top: -210px;
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 25px;
            padding: 40px;
            transform-style: preserve-3d;
            transition: all 0.5s ease;
            cursor: pointer;
        }
        
        .system-feature-card:nth-child(1) { transform: rotateY(0deg) translateZ(400px); }
        .system-feature-card:nth-child(2) { transform: rotateY(60deg) translateZ(400px); }
        .system-feature-card:nth-child(3) { transform: rotateY(120deg) translateZ(400px); }
        .system-feature-card:nth-child(4) { transform: rotateY(180deg) translateZ(400px); }
        .system-feature-card:nth-child(5) { transform: rotateY(240deg) translateZ(400px); }
        .system-feature-card:nth-child(6) { transform: rotateY(300deg) translateZ(400px); }
        
        .system-feature-card:hover {
            background: rgba(91, 76, 255, 0.1);
            border-color: rgba(91, 76, 255, 0.3);
            transform: rotateY(var(--rotation)) translateZ(420px) scale(1.05);
        }
        
        .system-feature-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, #5b4cff 0%, #00d4ff 100%);
            border-radius: 25px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            margin-bottom: 30px;
            box-shadow: 0 10px 25px rgba(91, 76, 255, 0.3);
        }
        
        .system-feature-title {
            font-size: 1.5rem;
            color: #fff;
            margin-bottom: 15px;
            font-weight: 700;
        }
        
        .system-feature-desc {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.6;
            margin-bottom: 25px;
        }
        
        .system-feature-badge {
            display: inline-block;
            padding: 5px 15px;
            background: rgba(91, 76, 255, 0.2);
            border-radius: 20px;
            font-size: 0.8rem;
            color: #8b80ff;
            font-weight: 500;
        }

        .systems-mechanism-wrap {
            position: relative;
            z-index: 4;
            text-align: center;
            margin: 8px 0 0;
            padding: 0 20px 24px;
        }

        .systems-mechanism-btn {
            font-family: inherit;
            cursor: pointer;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            padding: 14px 28px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, 0.22);
            background: rgba(255, 255, 255, 0.06);
            color: rgba(255, 255, 255, 0.92);
            font-size: 0.98rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            backdrop-filter: blur(12px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
            transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
        }

        .systems-mechanism-btn:hover {
            transform: translateY(-2px);
            border-color: rgba(0, 212, 255, 0.45);
            background: rgba(91, 76, 255, 0.18);
            box-shadow: 0 12px 40px rgba(91, 76, 255, 0.25);
        }

        .systems-mechanism-btn:focus-visible {
            outline: 2px solid #00d4ff;
            outline-offset: 3px;
        }

        body.light-mode .systems-mechanism-btn {
            background: linear-gradient(135deg, #4f46e5 0%, #6366f1 100%) !important;
            color: #ffffff !important;
            border-color: #4338ca !important;
            box-shadow: 0 4px 20px rgba(79, 70, 229, 0.28) !important;
            backdrop-filter: none;
        }

        body.light-mode .systems-mechanism-btn:hover {
            background: linear-gradient(135deg, #4338ca 0%, #4f46e5 100%) !important;
            border-color: #3730a3 !important;
            color: #ffffff !important;
            box-shadow: 0 8px 28px rgba(79, 70, 229, 0.35) !important;
        }

        body.light-mode .systems-mechanism-btn:focus-visible {
            outline-color: #4f46e5;
        }