/* roulang page: index */
:root {
            --primary: #0F4C81;
            --accent: #FF5630;
            --text-main: #1E293B;
            --text-muted: #475569;
            --bg-page: #F8FAFC;
        }
        body {
            color: var(--text-main);
            background-color: var(--bg-page);
            line-height: 1.7;
        }
        .smooth-scroll {
            scroll-behavior: smooth;
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(11, 19, 43, 0.92) 0%, rgba(15, 76, 129, 0.85) 100%);
        }
        .card-hover {
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -4px rgba(0, 0, 0, 0.08);
        }
        .faq-answer {
            transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
        }