/* roulang page: index */
:root {
            --brand-main: #06B6D4;
            --brand-purple: #8B5CF6;
            --bg-dark: #0B0F19;
            --bg-slate: #0F172A;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
        }
        body {
            font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: #F8FAFC;
            color: #0F172A;
            overflow-x: hidden;
            scroll-behavior: smooth;
        }
        .text-gradient {
            background: linear-gradient(135deg, #06B6D4 0%, #8B5CF6 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .bg-gradient-brand {
            background: linear-gradient(135deg, #06B6D4 0%, #8B5CF6 100%);
        }
        .bg-hero-pattern {
            background-image: radial-gradient(rgba(6, 182, 212, 0.15) 1px, transparent 1px), radial-gradient(rgba(139, 92, 246, 0.15) 1px, #0B0F19 1px);
            background-size: 40px 40px;
            background-position: 0 0, 20px 20px;
        }
        .glass-card {
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(6, 182, 212, 0.2);
        }
        .light-glass {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(226, 232, 240, 0.8);
        }
        .accordion-content {
            transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
            max-height: 0;
            opacity: 0;
            overflow: hidden;
        }
        .accordion-content.active {
            max-height: 250px;
            opacity: 1;
        }