.hero-section {
            background: white;
            color: white;
            border-radius: 10px;
            padding: 3rem;
            margin-bottom: 2rem;
        }
        
        /* Stats section */
        .stat-card {
            text-align: center;
            padding: 1.5rem;
            border-radius: 10px;
            height: 100%;
            border: 1px solid #e0e0e0;
            margin-bottom: 0.5rem;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: #2575fc;
            margin-bottom: 0.5rem;
        }
        .stat-title {
            font-size: 1rem;
            color: #6c757d;
        }
        
        /* Feature card */
        .feature-card {
            transition: all 0.3s ease;
            border: 1px solid #e0e0e0;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
            background-color: white;
            padding: 1.5rem;
            margin-bottom: 2rem;
        }
        .feature-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            border-color: #2575fc;
        }
        
        /* Device card */
        .device-card {
            border: 1px solid #e0e0e0;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            margin-bottom: 2rem;
            background-color: white;
            height: 100%;
        }
        .device-header {
            background: linear-gradient(135deg, #6a11cb 0%, #2575fc 70%);
            color: white;
            padding: 1.5rem;
            text-align: center;
        }
        .device-body {
            padding: 2rem;
        }
        .device-price {
            font-size: 2rem;
            font-weight: 700;
            color: #2575fc;
            text-align: center;
            margin: 1.5rem 0;
        }
        .device-specs {
          list-style: none;
          padding-left: 0;
          font-size: 0.8rem;
        }
        .device-specs li {
            margin-bottom: 0.8rem;
        }
        .port-calculator {
            background-color: #f8f9fa;
            border-radius: 10px;
            padding: 1.5rem;
            margin-top: 1.5rem;
        }
        .port-slider {
            width: 100%;
        }
        .total-price {
            font-size: 1.8rem;
            font-weight: 700;
            color: #2575fc;
            margin-top: 1rem;
        }
        
        /* Config section */
        .config-table {
            width: 100%;
            margin-top: 1.5rem;
        }
        .config-table th {
            background-color: #f8f9fa;
            padding: 0.8rem;
            text-align: left;
        }
        .config-table td {
            padding: 0.8rem;
            border-bottom: 1px solid #e0e0e0;
        }
        
        /* Modal styling */
        .modal-backdrop.show {
            opacity: 0.6 !important;
            background-color: #000;
        }
        .modal-content {
            background: transparent;
            border: none;
        }
        .btn-close {
            filter: invert(1);
            opacity: 1;
            position: absolute;
            right: 20px;
            top: 20px;
            z-index: 1050;
        }
        
        .col-md-6 {
          color: #0066fa; /* Màu trắng */
        }
        /* Image zoom effect */
        .zoomable-image {
            cursor: zoom-in;
            transition: transform 0.3s;
        }
        .zoomable-image:hover {
            transform: scale(1.02);
        }