/* roulang page: index */
:root {
            --bg-main: #0A0E1A;
            --bg-secondary: #0F172A;
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --border-glass: rgba(148, 163, 184, 0.12);
            --cyan-glow: rgba(6, 182, 212, 0.35);
        }
        body {
            background-color: var(--bg-main);
            color: #E2E8F0;
            font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glass-panel:hover {
            border-color: rgba(6, 182, 212, 0.45);
            box-shadow: 0 12px 35px -5px rgba(6, 182, 212, 0.2);
            transform: translateY(-3px);
        }
        .glow-btn-primary {
            background: linear-gradient(135deg, #2563EB 0%, #06B6D4 100%);
            box-shadow: 0 0 20px rgba(37, 99, 235, 0.45);
            transition: all 0.3s ease;
        }
        .glow-btn-primary:hover {
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.65);
            transform: translateY(-2px);
        }
        .glow-btn-secondary {
            background: rgba(15, 23, 42, 0.85);
            border: 1px solid rgba(6, 182, 212, 0.5);
            box-shadow: 0 0 12px rgba(6, 182, 212, 0.15);
            transition: all 0.3s ease;
        }
        .glow-btn-secondary:hover {
            background: rgba(30, 41, 59, 0.9);
            border-color: #06B6D4;
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.35);
        }
        .heading-accent {
            background: linear-gradient(135deg, #FFFFFF 20%, #E2E8F0 60%, #38BDF8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .carousel-slide {
            transition: opacity 0.8s ease-in-out;
        }