/* roulang page: index */
:root {
            --bg-base: #080B14;
            --bg-surface: #0F172A;
            --brand-primary: #2563EB;
            --brand-glow: #38BDF8;
            --brand-purple: #818CF8;
            --brand-emerald: #10B981;
            --text-main: #FFFFFF;
            --text-muted: #94A3B8;
            --border-tech: rgba(255, 255, 255, 0.08);
            --glow-card: 0 0 25px rgba(56, 189, 248, 0.15);
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-muted);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: rgba(15, 23, 42, 0.72);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-tech);
        }
        .glass-panel:hover {
            border-color: rgba(56, 189, 248, 0.35);
            box-shadow: 0 10px 30px -10px rgba(56, 189, 248, 0.25);
        }
        .glow-btn {
            background: linear-gradient(135deg, #2563EB 0%, #06B6D4 100%);
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.35);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glow-btn:hover {
            box-shadow: 0 0 25px rgba(56, 189, 248, 0.65);
            transform: translateY(-2px);
        }
        .tech-border-glow {
            position: relative;
        }
        .tech-border-glow::after {
            content: '';
            position: absolute;
            inset: -1px;
            background: linear-gradient(90deg, rgba(37,99,235,0.4), rgba(56,189,248,0.2), rgba(129,140,248,0.4));
            border-radius: inherit;
            z-index: -1;
        }
        .circuit-bg {
            background-image: radial-gradient(rgba(56, 189, 248, 0.08) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .text-gradient-cyan {
            background: linear-gradient(135deg, #FFFFFF 20%, #38BDF8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }