/* roulang page: index */
:root {
            --bg-page: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border-light: #e2e8f0;
            --card-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
            --card-hover-shadow: 0 20px 30px -10px rgba(2, 132, 199, 0.16), 0 12px 14px -6px rgba(15, 23, 42, 0.08);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }
        .custom-card {
            background: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 1rem;
            box-shadow: var(--card-shadow);
            transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .custom-card:hover {
            box-shadow: var(--card-hover-shadow);
            transform: translateY(-3px);
            border-color: #bae0fd;
        }
        .hero-bg {
            background: radial-gradient(circle at 85% 15%, #e0effe 0%, #f8fafc 55%);
        }