/* roulang page: index */
:root {
            --primary: #3B28CC;
            --primary-hover: #3122ab;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --bg-page: #F8FAFC;
            --card-border: rgba(226, 232, 240, 0.9);
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-body);
            font-feature-settings: "tnum";
            text-rendering: optimizeLegibility;
            -webkit-font-smoothing: antialiased;
        }
        .hero-banner {
            background-image: linear-gradient(180deg, rgba(15, 23, 42, 0.88) 0%, rgba(11, 15, 23, 0.94) 100%), url('/assets/images/6c1df5e25b738ceb.jpg');
            background-size: cover;
            background-position: center;
        }
        .cta-banner {
            background-image: linear-gradient(135deg, rgba(59, 40, 204, 0.95) 0%, rgba(15, 23, 42, 0.98) 100%), url('/assets/images/a0cf9ed95c3de340.webp');
            background-size: cover;
            background-position: center;
        }
        .metric-glow {
            box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .metric-glow:hover {
            transform: translateY(-4px);
            border-color: #3B28CC;
            box-shadow: 0 12px 30px -4px rgba(59, 40, 204, 0.12);
        }
        .brand-shadow {
            box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.08);
        }
        details summary::-webkit-details-marker {
            display: none;
        }