/* roulang page: index */
:root {
            --primary: #0A66C2;
            --secondary: #6366F1;
            --accent: #10B981;
            --bg-base: #F8FAFC;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }
        .hero-banner-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 41, 59, 0.85) 100%), url('/assets/images/2bf4da56a703bb72.jpg') center/cover no-repeat;
        }
        .bg-mesh-dark {
            background-color: #0F172A;
            background-image: radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.15) 0px, transparent 50%),
                              radial-gradient(at 100% 100%, rgba(10, 102, 194, 0.15) 0px, transparent 50%);
        }
        .gradient-border-card {
            border: 1px solid rgba(226, 232, 240, 0.9);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .gradient-border-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 32px -8px rgba(99, 102, 241, 0.12);
            border-color: rgba(99, 102, 241, 0.4);
        }
        .dark-card-glow {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            transition: all 0.3s ease;
        }
        .dark-card-glow:hover {
            border-color: rgba(99, 102, 241, 0.5);
            box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.3);
        }