/* roulang page: index */
:root {
            --bg-deep: #0F141C;
            --bg-panel: #161D27;
            --color-cyan: #00D2B4;
            --color-emerald: #10B981;
            --color-amber: #F59E0B;
            --border-industrial: #2D3748;
            --text-main: #F8FAFC;
            --text-muted: #94A3B8;
        }
        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Roboto, "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .circuit-bg {
            background-image: radial-gradient(rgba(0, 210, 180, 0.08) 1px, transparent 1px), radial-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px);
            background-size: 32px 32px;
            background-position: 0 0, 16px 16px;
        }
        .telemetry-num {
            font-family: 'JetBrains Mono', 'Roboto Mono', monospace;
            letter-spacing: -0.04em;
        }
        .hardware-card {
            border: 1px solid var(--border-industrial);
            background-color: var(--bg-panel);
            transition: all 0.25s ease-in-out;
        }
        .hardware-card:hover {
            border-color: rgba(0, 210, 180, 0.6);
            box-shadow: 0 8px 30px rgba(0, 210, 180, 0.08);
            transform: translateY(-2px);
        }
        .hardware-card-highlight {
            border: 1px solid var(--color-cyan);
            background: linear-gradient(180deg, rgba(0, 210, 180, 0.08) 0%, rgba(22, 29, 39, 0.95) 100%);
            box-shadow: 0 0 25px rgba(0, 210, 180, 0.15);
        }
        details > summary::-webkit-details-marker {
            display: none;
        }