/* roulang page: index */
:root {
            --primary: #1D4ED8;
            --primary-light: #0EA5E9;
            --dark: #0F172A;
            --text-main: #334155;
            --text-muted: #64748B;
            --bg-light: #F8FAFC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            scroll-behavior: smooth;
        }
        .card-transition {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-transition:hover {
            transform: translateY(-4px);
        }
        .hero-pattern {
            background-image: radial-gradient(rgba(14, 165, 233, 0.12) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .gold-badge {
            background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
        }
        details summary::-webkit-details-marker {
            display: none;
        }