/* roulang page: index */
:root {
            --primary-navy: #0F172A;
            --primary-slate: #1E293B;
            --accent-emerald: #10B981;
            --accent-amber: #F59E0B;
            --bg-canvas: #F8FAFC;
            --border-light: #E2E8F0;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-canvas);
            color: var(--text-body);
            line-height: 1.75;
            overflow-x: hidden;
        }

        .container-custom {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .section-padding {
            padding-top: 5.5rem;
            padding-bottom: 5.5rem;
        }

        .card-panel {
            background-color: #ffffff;
            border: 1px solid var(--border-light);
            border-radius: 8px;
            box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
            transition: transform 0.25s ease, box-shadow 0.25s ease;
        }

        .card-panel:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.08);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--accent-emerald);
            color: #ffffff;
            font-weight: 600;
            border-radius: 6px;
            padding: 0.75rem 1.75rem;
            transition: all 0.2s ease;
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.25);
        }

        .btn-primary:hover {
            background-color: #059669;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.35);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--primary-slate);
            color: #ffffff;
            font-weight: 600;
            border-radius: 6px;
            padding: 0.75rem 1.75rem;
            transition: all 0.2s ease;
        }

        .btn-secondary:hover {
            background-color: #0F172A;
            transform: translateY(-2px);
        }

        .badge-radar {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 0.8125rem;
            font-weight: 600;
            border-radius: 9999px;
            background-color: rgba(16, 185, 129, 0.12);
            color: #065F46;
            border: 1px solid rgba(16, 185, 129, 0.25);
        }

        .radar-pulse {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: #10B981;
            margin-right: 8px;
            box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
            animation: pulse-ring 2s infinite cubic-bezier(0.4, 0, 0.6, 1);
        }

        @keyframes pulse-ring {
            0% {
                transform: scale(0.95);
                box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
            }
            70% {
                transform: scale(1);
                box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
            }
            100% {
                transform: scale(0.95);
                box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
            }
        }

        .nav-item {
            position: relative;
            color: #475569;
            font-weight: 500;
            transition: color 0.2s ease;
        }

        .nav-item:hover, .nav-item.active {
            color: #0F172A;
        }

        .nav-item:hover::after, .nav-item.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -6px;
            width: 100%;
            height: 2px;
            background-color: #10B981;
            border-radius: 2px;
        }

        .stage-backdrop {
            background: linear-gradient(180deg, #090D16 0%, #0F172A 100%);
        }

        .grid-tech-matrix {
            background-size: 32px 32px;
            background-image: 
                linear-gradient(to right, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
                linear-gradient(to bottom, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
        }