/* roulang page: index */
:root {
            --primary: #1B365D;
            --primary-dark: #0F1E33;
            --accent: #C5832B;
            --accent-green: #1F7A63;
            --bg-light: #F8FAFC;
            --ink-text: #0F172A;
            --muted-text: #475569;
            --border-color: #E2E8F0;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--ink-text);
            background-color: #FFFFFF;
        }

        body {
            overflow-x: hidden;
            line-height: 1.75;
        }

        .container-custom {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        .card-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }

        .card-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.12);
            border-color: #CBD5E1;
        }

        .hero-banner-bg {
            background-image: linear-gradient(rgba(15, 30, 51, 0.88), rgba(15, 30, 51, 0.92)), url('/assets/images/5997a2e12dc7c280.jpg');
            background-size: cover;
            background-position: center;
        }

        .faq-accordion-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .faq-accordion-body.open {
            max-height: 300px;
        }