/* roulang page: index */
:root {
            --primary: #0F2B5C;
            --primary-dark: #0A192F;
            --secondary: #007ACC;
            --accent: #FF6B35;
            --text-main: #334155;
            --text-muted: #64748B;
            --bg-light: #F4F7FC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            color: var(--text-main);
            background-color: #ffffff;
            overflow-x: hidden;
        }
        .bg-pattern {
            background-image: radial-gradient(rgba(15, 43, 92, 0.06) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(15, 43, 92, 0.94) 0%, rgba(10, 25, 47, 0.88) 100%);
        }
        .card-hover {
            transition: all 0.25s ease-in-out;
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 32px -8px rgba(15, 43, 92, 0.12);
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }
        .accordion-item.active .accordion-content {
            max-height: 350px;
        }
        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }