/* roulang page: index */
:root {
            --brand-primary: #0D9488;
            --brand-dark: #0F766E;
            --brand-accent: #F97316;
            --bg-page: #F8FAFC;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-body);
        }
        .hero-pattern {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(13, 148, 136, 0.88) 100%), url('/assets/images/6926f07b061e83c1.jpg');
            background-size: cover;
            background-position: center;
        }
        .cta-bg {
            background-image: linear-gradient(135deg, rgba(15, 118, 110, 0.96) 0%, rgba(15, 23, 42, 0.96) 100%), url('/assets/images/be19ef2b33e8f1f5.jpg');
            background-size: cover;
            background-position: center;
        }
        details summary::-webkit-details-marker {
            display: none;
        }