/* roulang page: index */
:root {
            --bg-base: #0D1117;
            --bg-surface: #161B22;
            --bg-card: #1F242C;
            --border-color: #30363D;
            --accent-green: #00F59B;
            --accent-amber: #F59E0B;
            --text-primary: #F0F6FC;
            --text-secondary: #8B949E;
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-primary);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }

        .num-font {
            font-variant-numeric: tabular-nums;
            font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, monospace;
        }

        .glow-border {
            box-shadow: 0 0 15px -3px rgba(0, 245, 155, 0.15);
            border-color: rgba(0, 245, 155, 0.3);
        }

        .glow-card:hover {
            box-shadow: 0 10px 25px -5px rgba(0, 245, 155, 0.2);
            border-color: rgba(0, 245, 155, 0.5);
            transform: translateY(-2px);
        }

        .line-flow {
            background: linear-gradient(90deg, rgba(0,245,155,0.1), rgba(0,245,155,0.8), rgba(0,245,155,0.1));
            background-size: 200% 100%;
            animation: lineFlow 3s ease infinite;
        }

        @keyframes lineFlow {
            0% { background-position: 200% 0; }
            100% { background-position: -200% 0; }
        }

        .tab-btn.active {
            color: #00F59B;
            border-bottom: 2px solid #00F59B;
            background: rgba(0, 245, 155, 0.05);
        }