/* roulang page: index */
:root {
            --bg-base: #070C18;
            --bg-elevated: #0B132B;
            --brand-primary: #0066FF;
            --brand-accent: #00F0FF;
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-highlight: rgba(0, 240, 255, 0.35);
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-primary);
            line-height: 1.75;
            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-glass);
            box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
            transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
        }

        .glass-panel:hover {
            border-color: var(--border-highlight);
            box-shadow: 0 10px 35px -5px rgba(0, 240, 255, 0.15);
        }

        .btn-glow {
            background: linear-gradient(135deg, #0066FF 0%, #00F0FF 100%);
            box-shadow: 0 0 20px rgba(0, 102, 255, 0.5);
            transition: all 0.3s ease;
        }

        .btn-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
        }

        .btn-outline {
            border: 1px solid rgba(0, 240, 255, 0.5);
            background: rgba(0, 102, 255, 0.08);
            color: #F8FAFC;
            transition: all 0.3s ease;
        }

        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.15);
            border-color: #00F0FF;
            transform: translateY(-2px);
        }

        .pulse-dot {
            box-shadow: 0 0 10px #10B981;
        }

        .code-block {
            background: #050811;
            border: 1px solid rgba(255, 255, 255, 0.06);
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
        }

        .badge-cyan {
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            color: #00F0FF;
        }

        .timeline-line::before {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 2px;
            height: 100%;
            background: linear-gradient(180deg, #0066FF 0%, #00F0FF 50%, rgba(99, 102, 241, 0.2) 100%);
        }

        @media (max-width: 768px) {
            .timeline-line::before {
                left: 20px;
            }
        }