/* roulang page: index */
:root {
            --bg-canvas: #0A0F1D;
            --bg-canvas-alt: #0D1527;
            --brand-primary: #0066FF;
            --brand-cyan: #00F0FF;
            --brand-emerald: #10B981;
            --text-heading: #FFFFFF;
            --text-body: #94A3B8;
            --text-muted: #64748B;
            --border-glass: rgba(255, 255, 255, 0.08);
            --card-glass: rgba(16, 26, 48, 0.65);
        }
        body {
            background-color: var(--bg-canvas);
            color: var(--text-body);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            overflow-x: hidden;
        }
        .frosted-glass {
            background: var(--card-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
        }
        .glow-btn {
            background: linear-gradient(135deg, #0066FF 0%, #00B4D8 100%);
            box-shadow: 0 0 20px rgba(0, 102, 255, 0.45);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glow-btn:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.75);
            transform: translateY(-2px) scale(1.02);
        }
        .text-glow {
            text-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
        }
        .timeline-line::after {
            content: '';
            position: absolute;
            top: 2rem;
            left: 20%;
            width: 60%;
            height: 2px;
            background: linear-gradient(90deg, #0066FF, #00F0FF, #10B981);
            z-index: 0;
        }
        @media (max-width: 768px) {
            .timeline-line::after { display: none; }
        }