/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-light: #2563EB;
            --accent: #0EA5E9;
            --text-main: #0F172A;
            --text-muted: #475569;
            --border-light: #E2E8F0;
            --shadow-card: 0 10px 25px -5px rgba(30, 64, 175, 0.06), 0 8px 10px -6px rgba(30, 64, 175, 0.04);
            --shadow-hover: 0 20px 30px -10px rgba(30, 64, 175, 0.12), 0 10px 15px -3px rgba(30, 64, 175, 0.08);
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
        }
        .custom-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-light);
            border-radius: 12px;
            box-shadow: var(--shadow-card);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .custom-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: #BFDBFE;
        }
        .nav-link {
            transition: color 0.2s ease;
        }
        .nav-link:hover {
            color: var(--primary-light);
        }
        .btn-primary {
            background: linear-gradient(135deg, #1E40AF 0%, #2563EB 100%);
            color: #FFFFFF;
            font-weight: 600;
            border-radius: 8px;
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.39);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #1D4ED8 0%, #1E40AF 100%);
            transform: translateY(-1px);
            box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.45);
        }
        .hero-banner-strip {
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(226, 232, 240, 0.9);
            box-shadow: 0 12px 36px -4px rgba(15, 23, 42, 0.08);
        }
        .table-custom tr:hover {
            background-color: #F8FAFC;
        }