/* roulang page: index */
:root {
            --brand-primary: #0F172A;
            --brand-purple: #8B5CF6;
            --brand-cyan: #06B6D4;
            --bg-light: #F8FAFC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            background-color: var(--bg-light);
            color: #1E293B;
            overflow-x: hidden;
        }
        .text-gradient {
            background: linear-gradient(135deg, #06B6D4 0%, #8B5CF6 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .btn-gradient {
            background: linear-gradient(135deg, #06B6D4 0%, #8B5CF6 100%);
            transition: all 0.3s ease;
        }
        .btn-gradient:hover {
            opacity: 0.92;
            transform: translateY(-2px);
            box-shadow: 0 10px 20px -5px rgba(139, 92, 246, 0.5);
        }
        .border-gradient {
            border-image: linear-gradient(to right, #06B6D4, #8B5CF6) 1;
        }
        .video-backdrop-mesh {
            background: radial-gradient(circle at 50% 50%, rgba(15, 23, 42, 0.75) 0%, #070C18 100%);
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }