/* roulang page: index */
:root {
            --primary: #0F5B78;
            --primary-dark: #0A3E52;
            --secondary: #00B493;
            --dark-bg: #0B1E28;
            --light-bg: #F8FAFC;
            --border-color: #E2E8F0;
            --text-title: #0B1B2B;
            --text-body: #334155;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            color: var(--text-body);
            background-color: #FFFFFF;
            line-height: 1.7;
        }

        .hero-banner-bg {
            background: linear-gradient(135deg, rgba(11, 30, 40, 0.94) 0%, rgba(15, 91, 120, 0.88) 100%), url('/assets/images/4de4277138055d2a.jpg') center/cover no-repeat;
        }

        .dark-section-bg {
            background: linear-gradient(180deg, #0B1E28 0%, #061117 100%), url('/assets/images/0fd1a5322dedefcc.webp') center/cover no-repeat;
        }

        .gradient-btn {
            background: linear-gradient(135deg, #00B493 0%, #0F5B78 100%);
            transition: all 0.3s ease;
        }

        .gradient-btn:hover {
            opacity: 0.95;
            transform: translateY(-2px);
            box-shadow: 0 10px 20px -5px rgba(0, 180, 147, 0.4);
        }

        .card-custom {
            border-radius: 18px;
            background: #FFFFFF;
            border: 1px solid #E2E8F0;
            box-shadow: 0 4px 6px -1px rgba(15, 91, 120, 0.04), 0 10px 15px -3px rgba(15, 91, 120, 0.06);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .card-custom:hover {
            transform: translateY(-4px);
            border-color: #00B493;
            box-shadow: 0 12px 24px -6px rgba(15, 91, 120, 0.12);
        }

        .badge-pill {
            display: inline-flex;
            align-items: center;
            border-radius: 9999px;
            padding: 0.35rem 0.9rem;
            font-size: 0.875rem;
            font-weight: 600;
            background: rgba(0, 180, 147, 0.12);
            color: #0F5B78;
        }

        .faq-answer {
            transition: max-height 0.35s ease, opacity 0.35s ease;
        }