/* roulang page: index */
:root {
            --bg-canvas: #0B0E14;
            --bg-surface: #121824;
            --border-line: #1F293D;
            --neon-green: #10F3A5;
            --neon-purple: #6366F1;
            --text-main: #FFFFFF;
            --text-muted: #94A3B8;
        }
        * {
            box-sizing: border-box;
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-canvas);
            color: var(--text-muted);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .glow-card {
            background: #121824;
            border: 1px solid #1F293D;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glow-card:hover {
            border-color: rgba(16, 243, 165, 0.5);
            box-shadow: 0 0 25px rgba(16, 243, 165, 0.15);
            transform: translateY(-2px);
        }
        .glass-nav {
            background: rgba(11, 14, 20, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid #1F293D;
        }
        .gradient-text {
            background: linear-gradient(135deg, #FFFFFF 20%, #10F3A5 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .code-grid-bg {
            background-image: radial-gradient(rgba(16, 243, 165, 0.08) 1px, transparent 1px);
            background-size: 32px 32px;
        }