/* roulang page: index */
:root {
            --primary: #4f46e5;
            --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            --surface-bg: #f8fafc;
            --card-border: rgba(226, 232, 240, 0.8);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--surface-bg);
            color: #1e293b;
        }
        .text-gradient {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-banner-bg {
            background-image: linear-gradient(to right, rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.72)), url('/assets/images/f59ba86ce1293063.png');
            background-size: cover;
            background-position: center;
        }
        .card-custom {
            border: 1px solid var(--card-border);
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 30px -10px rgba(79, 70, 229, 0.12);
        }
        .accordion-content {
            transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
            max-height: 0;
            overflow: hidden;
            opacity: 0;
        }
        .accordion-content.open {
            max-height: 280px;
            opacity: 1;
        }