.accordion-container {
            max-width: 800px;
            margin: 0 auto;
            background: white;
            border-radius: 12px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            overflow: hidden;
        }

        .accordion-item {
            border-bottom: 1px solid #e0e0e0;
            position: relative;
        }

        .accordion-item:last-child {
            border-bottom: none;
        }

        .accordion-checkbox {
            display: none;
        }

        .accordion-header {
            display: block;
            padding: 24px 70px 24px 30px;
            background: #ffffff;
            cursor: pointer;
            -webkit-user-select: none;
               -moz-user-select: none;
                -ms-user-select: none;
                    user-select: none;
            transition: all 0.4s ease;
            position: relative;
            font-size: 18px;
            font-weight: 600;
            color: #333;
            border: none;
            width: 100%;
            text-align: left;
        }

        .accordion-header:hover {
            background: #f8f9fa;
            color: #667eea;
        }

        .accordion-header::after {
            content: '+';
            position: absolute;
            right: 30px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 24px;
            font-weight: 300;
            transition: transform 0.4s ease, color 0.4s ease;
            color: #667eea;
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.6s ease, padding 0.6s ease;
            background: #fafbfc;
        }

        .accordion-content-inner {
            padding: 0 30px;
            color: #666;
            line-height: 1.6;
            font-size: 16px;
        }

        .accordion-checkbox:checked + .accordion-header {
            background: #667eea;
            color: white;
        }

        .accordion-checkbox:checked + .accordion-header::after {
            transform: translateY(-50%) rotate(45deg);
            color: white;
        }

        .accordion-checkbox:checked ~ .accordion-content {
            max-height: 500px;
            padding: 30px 0;
        }

        .accordion-item {
            transition: box-shadow 0.3s ease;
        }

        .accordion-checkbox:checked + .accordion-header + .accordion-content {
            box-shadow: inset 0 4px 8px rgba(102, 126, 234, 0.1);
        }

        @media (max-width: 768px) {
            .accordion-container {
                margin: 0 10px;
            }
            
            .accordion-header {
                padding: 20px 60px 20px 20px;
                font-size: 16px;
            }
            
            .accordion-header::after {
                right: 20px;
                font-size: 20px;
            }
            
            .accordion-content-inner {
                padding: 0 20px;
            }
            
            .accordion-checkbox:checked ~ .accordion-content {
                padding: 20px 0;
            }
        }

        .accordion-container::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            background: linear-gradient(45deg, #667eea, #764ba2, #667eea);
            border-radius: 14px;
            z-index: -1;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .accordion-container:hover::before {
            opacity: 0.1;
        }