/* roulang page: index */
:root {
            --primary: #0D9488;
            --primary-hover: #0f766e;
            --accent: #F59E0B;
            --dark-bg: #0F172A;
            --text-main: #0F172A;
            --text-muted: #475569;
            --surface-light: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #ffffff;
            line-height: 1.6;
        }
        .text-gradient {
            background: linear-gradient(135deg, #0D9488 0%, #10B981 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-bg {
            background: linear-gradient(to right, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.8)), url('/assets/images/9f6bd407f97666b3.jpg') center/cover no-repeat;
        }
        .cta-bg {
            background: linear-gradient(135deg, #0f172a 0%, #115e59 100%);
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(13, 148, 136, 0.1), 0 8px 10px -6px rgba(13, 148, 136, 0.1);
        }
        details summary::-webkit-details-marker {
            display: none;
        }