/* roulang page: index */
:root {
            --color-primary: #1E40AF;
            --color-primary-hover: #1D4ED8;
            --color-accent: #0284C7;
            --color-bg-light: #F8FAFC;
            --color-surface: #FFFFFF;
            --color-text-main: #0F172A;
            --color-text-muted: #475569;
            --color-text-subtle: #94A3B8;
            --color-border: #E2E8F0;
            --color-dark-panel: #0F172A;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--color-text-main);
            background-color: #FFFFFF;
        }

        .hero-industrial-bg {
            background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(30, 64, 175, 0.88) 100%), url('/assets/images/d0f136ed4ce19f59.webp');
            background-size: cover;
            background-position: center;
        }

        .dark-section-bg {
            background-color: var(--color-dark-panel);
            background-image: radial-gradient(circle at 80% 20%, rgba(2, 132, 199, 0.15) 0%, transparent 60%);
        }

        .card-elevated {
            transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
            border: 1px solid var(--color-border);
        }
        .card-elevated:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 32px -4px rgba(30, 64, 175, 0.08), 0 4px 12px -2px rgba(0, 0, 0, 0.04);
            border-color: #CBD5E1;
        }

        .metric-mono {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
        }

        .no-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .no-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }