/* roulang page: index */
:root {
            --primary: #4f46e5;
            --primary-hover: #4338ca;
            --cyan-accent: #06b6d4;
            --bg-light: #f8f9fa;
            --bg-dark: #0d1117;
            --text-main: #0f172a;
            --text-muted: #475569;
            --border-color: #e2e8f0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        .glow-effect {
            box-shadow: 0 0 25px -5px rgba(79, 70, 229, 0.4);
        }
        .glow-card:hover {
            box-shadow: 0 10px 30px -10px rgba(6, 182, 212, 0.25);
            transform: translateY(-3px);
        }
        .timeline-line::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 2px;
            background: #cbd5e1;
            transform: translateX(-50%);
        }
        @media (max-width: 768px) {
            .timeline-line::before {
                left: 20px;
            }
        }