/* roulang page: index */
:root {
            --primary: #00F0FF;
            --accent-purple: #7928CA;
            --accent-pink: #FF0080;
            --bg-main: #0B0D13;
            --bg-card: #131722;
            --text-main: #FFFFFF;
            --text-muted: #94A3B8;
            --border-line: rgba(255, 255, 255, 0.08);
        }
        body {
            background-color: var(--bg-main);
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
            scroll-behavior: smooth;
        }
        .glow-cyan {
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.28);
        }
        .glow-btn:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
        }
        .bg-glass {
            background: rgba(18, 21, 30, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-line);
        }
        .timeline-track {
            background: repeating-linear-gradient(90deg, rgba(255,255,255,0.03), rgba(255,255,255,0.03) 1px, transparent 1px, transparent 20px);
        }