/* roulang page: index */
:root {
            --bg-main: #0B0F19;
            --bg-card: #111827;
            --border-dim: #1F2937;
            --glow-cyan: rgba(0, 242, 254, 0.15);
            --cyan-primary: #00F2FE;
        }
        body {
            background-color: var(--bg-main);
            color: #F3F4F6;
            font-family: system-ui, -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .hud-border {
            border: 1px solid #1F2937;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .hud-border:hover {
            border-color: rgba(0, 242, 254, 0.5);
            box-shadow: 0 0 25px rgba(0, 242, 254, 0.15);
        }
        .tech-gradient-text {
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 50%, #10B981 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .radar-scan-bg {
            background-image: radial-gradient(rgba(0, 242, 254, 0.08) 1px, transparent 1px),
                              radial-gradient(rgba(79, 172, 254, 0.05) 1px, #0B0F19 1px);
            background-size: 32px 32px;
            background-position: 0 0, 16px 16px;
        }