/* roulang page: index */
:root {
            --color-primary: #0F172A;
            --color-cobalt: #2563EB;
            --color-cyan: #0EA5E9;
            --color-canvas: #FFFFFF;
            --color-alt: #F8FAFC;
            --color-text-main: #1E293B;
            --color-text-muted: #64748B;
            --color-border: #E2E8F0;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--color-text-main);
            background-color: #FFFFFF;
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

        .font-mono-num {
            font-family: "JetBrains Mono", "SF Mono", monospace;
            font-feature-settings: "tnum" 1;
        }

        .industrial-grid {
            background-size: 32px 32px;
            background-image: 
                linear-gradient(to right, rgba(15, 23, 42, 0.04) 1px, transparent 1px),
                linear-gradient(to bottom, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
        }

        .dark-industrial-grid {
            background-size: 40px 40px;
            background-image: 
                linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
        }

        .card-hover {
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -10px rgba(15, 23, 42, 0.08);
            border-color: rgba(37, 99, 235, 0.35);
        }

        .section-separator {
            position: relative;
        }
        .section-separator::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(226, 232, 240, 0.8) 20%, rgba(226, 232, 240, 0.8) 80%, transparent);
        }