/* roulang page: index */
:root {
            --bg-primary: #0B0F19;
            --bg-secondary: #111827;
            --card-glass: rgba(22, 30, 49, 0.72);
            --card-border: rgba(56, 189, 248, 0.15);
            --neon-blue: #3B82F6;
            --neon-cyan: #06B6D4;
            --neon-green: #10B981;
            --text-main: #F9FAFB;
            --text-muted: #9CA3AF;
        }
        * {
            box-sizing: border-box;
            font-family: 'Noto Sans SC', sans-serif;
        }
        .font-mono {
            font-family: 'JetBrains Mono', monospace;
        }
        body {
            background-color: var(--bg-primary);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .glass-card {
            background: var(--card-glass);
            border: 1px solid var(--card-border);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .glass-card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glass-card-hover:hover {
            border-color: rgba(6, 182, 212, 0.5);
            transform: translateY(-4px);
            box-shadow: 0 12px 30px -10px rgba(6, 182, 212, 0.3);
        }
        .text-glow {
            text-shadow: 0 0 15px rgba(6, 182, 212, 0.6);
        }
        .gradient-text {
            background: linear-gradient(135deg, #38BDF8 0%, #06B6D4 50%, #10B981 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .grid-tech-bg {
            background-image: radial-gradient(rgba(59, 130, 246, 0.12) 1px, transparent 1px), radial-gradient(rgba(6, 182, 212, 0.08) 1px, transparent 1px);
            background-size: 32px 32px;
            background-position: 0 0, 16px 16px;
        }
        .timeline-line::before {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            left: 50%;
            width: 2px;
            background: linear-gradient(to bottom, #3B82F6, #06B6D4, #10B981);
            transform: translateX(-50%);
        }
        @media (max-width: 768px) {
            .timeline-line::before {
                left: 24px;
            }
        }