/* roulang page: index */
:root {
            --bg-deep: #070B19;
            --bg-layer: #0D1530;
            --tech-blue: #0066FF;
            --tech-cyan: #00F2FE;
            --glass-bg: rgba(15, 23, 42, 0.72);
            --glass-border: rgba(255, 255, 255, 0.08);
            --glass-border-highlight: rgba(0, 242, 254, 0.35);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-deep);
            color: #F8FAFC;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            box-shadow: 0 8px 32px 0 rgba(0, 10, 30, 0.45);
        }
        .glass-card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glass-card-hover:hover {
            transform: translateY(-4px);
            border-color: var(--glass-border-highlight);
            box-shadow: 0 16px 40px -8px rgba(0, 102, 255, 0.35), 0 0 20px 0 rgba(0, 242, 254, 0.2);
        }
        .btn-neon {
            background: linear-gradient(135deg, #0066FF 0%, #0052CC 100%);
            transition: all 0.25s ease-in-out;
            border: 1px solid rgba(0, 242, 254, 0.3);
        }
        .btn-neon:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 20px rgba(0, 102, 255, 0.65), 0 0 40px rgba(0, 242, 254, 0.3);
        }
        .btn-ghost {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: all 0.25s ease-in-out;
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #00F2FE;
            color: #00F2FE;
        }
        .glow-text-cyan {
            text-shadow: 0 0 18px rgba(0, 242, 254, 0.45);
        }
        .dot-grid {
            background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
            background-size: 28px 28px;
        }
        .section-separator {
            position: relative;
        }
        .section-separator::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 5%;
            right: 5%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
        }