/* roulang page: index */
:root {
            --primary: #00F0FF;
            --secondary: #7928CA;
            --accent: #FF5500;
            --bg-dark: #0A0B0E;
            --bg-panel: #12151C;
            --border-glow: rgba(0, 240, 255, 0.2);
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            background-color: var(--bg-dark);
            color: #F8FAFC;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Inter", sans-serif;
            overflow-x: hidden;
        }
        .glow-border {
            border: 1px solid var(--border-glow);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glow-border:hover {
            border-color: rgba(0, 240, 255, 0.6);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.2);
        }
        .cyber-grid {
            background-size: 32px 32px;
            background-image: linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                              linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
        }
        .btn-gradient {
            background: linear-gradient(135deg, #00F0FF 0%, #7928CA 100%);
            transition: all 0.25s ease;
        }
        .btn-gradient:hover {
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
        }