/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-hover: #1D4ED8;
            --accent: #3B82F6;
            --warning: #F97316;
            --bg-base: #F8FAFC;
            --text-dark: #0F172A;
            --text-muted: #475569;
            --border-color: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-dark);
            line-height: 1.6;
            scroll-behavior: smooth;
        }
        .section-py {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        @media (max-width: 768px) {
            .section-py {
                padding-top: 3.5rem;
                padding-bottom: 3.5rem;
            }
        }
        .badge-pulse {
            animation: pulse-ring 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
        }
        @keyframes pulse-ring {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.85; transform: scale(1.03); }
        }
        .flash-deal-gradient {
            background: linear-gradient(135deg, #1E3A8A 0%, #1E40AF 50%, #0F172A 100%);
        }