/* roulang page: index */
:root {
            --color-primary: #0B192C;
            --color-accent: #0066FF;
            --color-emerald: #00B488;
            --color-bg: #F4F7FA;
            --color-surface-dark: #060D17;
            --text-main: #334155;
            --text-heading: #0B192C;
            --text-muted: #64748B;
            --border-light: #E2E8F0;
            --shadow-card: 0 4px 20px -2px rgba(11, 25, 44, 0.06);
        }
        * { box-sizing: border-box; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: var(--color-bg);
            line-height: 1.6;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }
        .container-custom {
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 640px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
        }
        .card-industrial {
            background: #FFFFFF;
            border-radius: 10px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
        }
        .card-industrial:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px -4px rgba(11, 25, 44, 0.1);
            border-color: #CBD5E1;
        }
        .btn-action-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: var(--color-accent);
            color: #FFFFFF;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 6px;
            transition: all 0.2s ease;
            box-shadow: 0 2px 8px rgba(0, 102, 255, 0.25);
        }
        .btn-action-primary:hover {
            background-color: #0052CC;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(0, 102, 255, 0.35);
        }
        .btn-action-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background-color: transparent;
            color: #FFFFFF;
            border: 1px solid rgba(255, 255, 255, 0.3);
            font-weight: 500;
            padding: 12px 26px;
            border-radius: 6px;
            transition: all 0.2s ease;
        }
        .btn-action-outline:hover {
            border-color: #FFFFFF;
            background-color: rgba(255, 255, 255, 0.08);
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] {
            border-left: 4px solid var(--color-accent);
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }
        .mono-stat {
            font-variant-numeric: tabular-nums;
        }