/* roulang page: index */
:root {
            --brand-dark: #0B0F19;
            --brand-card: #131B2E;
            --brand-cyan: #0284C7;
            --brand-teal: #06B6D4;
            --brand-border: #1E293B;
            --text-main: #0F172A;
            --text-muted: #64748B;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: #F8FAFC;
            color: #334155;
            overflow-x: hidden;
        }
        .bg-mesh-dark {
            background-color: #070B14;
            background-image: radial-gradient(rgba(14, 165, 233, 0.12) 1px, transparent 1px), radial-gradient(rgba(15, 23, 42, 0.8) 1px, #070B14 1px);
            background-size: 32px 32px;
            background-position: 0 0, 16px 16px;
        }
        .bg-mesh-light {
            background-color: #F8FAFC;
            background-image: radial-gradient(#E2E8F0 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .glow-cyan {
            box-shadow: 0 0 35px -5px rgba(6, 182, 212, 0.25);
        }
        .card-shadow {
            box-shadow: 0 10px 30px -10px rgba(15, 23, 42, 0.07);
        }
        .btn-gradient {
            background: linear-gradient(135deg, #0284C7 0%, #06B6D4 100%);
        }
        .btn-gradient:hover {
            background: linear-gradient(135deg, #0369A1 0%, #0891B2 100%);
        }
        .text-gradient {
            background: linear-gradient(135deg, #0284C7 0%, #06B6D4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .text-gradient-light {
            background: linear-gradient(135deg, #FFFFFF 20%, #94A3B8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }