/* roulang page: index */
:root {
            --primary: #1E40AF;
            --accent: #2563EB;
            --darkbg: #0F172A;
            --slatebg: #F8FAFC;
        }
        html { scroll-behavior: smooth; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--slatebg); color: #334155; }
        .hero-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(30, 64, 175, 0.88) 100%), url('/assets/images/848e50ab66436bf7.webp') center/cover no-repeat;
        }
        .card-shadow {
            box-shadow: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-shadow:hover {
            box-shadow: 0 20px 25px -5px rgba(30, 64, 175, 0.12), 0 8px 10px -6px rgba(30, 64, 175, 0.08);
            transform: translateY(-4px);
        }
        .accordion-content { max-height: 0; overflow: hidden; transition: max-height 0.3s ease-out; }
        .accordion-content.active { max-height: 240px; }