/* roulang page: index */
:root {
            --primary: #4F46E5;
            --primary-gradient: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
            --accent-emerald: #10B981;
            --slate-bg: #F8FAFC;
            --slate-card: #FFFFFF;
            --slate-text: #0F172A;
            --slate-muted: #475569;
            --slate-border: #E2E8F0;
            --radius-card: 1.5rem;
            --shadow-soft: 0 10px 30px -5px rgba(15, 23, 42, 0.05), 0 4px 6px -2px rgba(15, 23, 42, 0.02);
            --shadow-hover: 0 20px 35px -5px rgba(79, 70, 229, 0.12), 0 10px 15px -5px rgba(6, 182, 212, 0.08);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            color: var(--slate-text);
            background-color: var(--slate-bg);
            overflow-x: hidden;
        }

        .bg-brand-gradient {
            background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
        }

        .text-brand-gradient {
            background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .glass-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .card-custom {
            border-radius: var(--radius-card);
            background: #FFFFFF;
            border: 1px solid var(--slate-border);
            box-shadow: var(--shadow-soft);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .card-custom:hover {
            transform: translateY(-4px);
            border-color: #C7D2FE;
            box-shadow: var(--shadow-hover);
        }

        .hero-diagonal-bg {
            clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }
        .accordion-content.active {
            max-height: 400px;
        }

        .btn-brand-primary {
            background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
            transition: all 0.25s ease;
        }
        .btn-brand-primary:hover {
            opacity: 0.94;
            transform: translateY(-1px);
            box-shadow: 0 10px 20px -3px rgba(79, 70, 229, 0.35);
        }