/* roulang page: index */
:root {
            --primary-dark: #0F172A;
            --accent-emerald: #059669;
            --emerald-light: #10B981;
            --bg-mist: #F8FAFC;
            --border-soft: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #1E293B;
            background-color: #FFFFFF;
            overflow-x: hidden;
        }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(15, 23, 42, 0.94), rgba(15, 23, 42, 0.82)), url('/assets/images/37631ab6d5c7954c.webp');
            background-size: cover;
            background-position: center;
        }
        .dark-section-bg {
            background-image: linear-gradient(to bottom, #0F172A, #111827);
        }
        .cta-bg {
            background-image: linear-gradient(135deg, #0F172A 0%, #064E3B 100%);
        }
        .transition-standard {
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-hover:hover {
            transform: translateY(-3px);
            border-color: rgba(5, 150, 105, 0.4);
            box-shadow: 0 12px 24px -10px rgba(15, 23, 42, 0.08);
        }
        details summary::-webkit-details-marker {
            display: none;
        }