/* roulang page: index */
:root {
            --bg-primary: #070B14;
            --bg-secondary: #0B1120;
            --accent-cyan: #00F2FE;
            --accent-blue: #4FACFE;
            --card-glass: rgba(15, 23, 42, 0.75);
            --border-glass: rgba(255, 255, 255, 0.08);
            --glow-cyan: 0 0 24px rgba(0, 242, 254, 0.35);
        }

        body {
            background-color: var(--bg-primary);
            color: #F8FAFC;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }

        .glass-panel {
            background: var(--card-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .glass-panel:hover {
            border-color: rgba(0, 242, 254, 0.4);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(0, 242, 254, 0.12);
        }

        .btn-glow {
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
            box-shadow: 0 4px 18px rgba(0, 242, 254, 0.3);
            transition: all 0.25s ease;
        }

        .btn-glow:hover {
            box-shadow: 0 0 28px rgba(0, 242, 254, 0.6);
            transform: translateY(-2px);
        }

        .glow-text-cyan {
            text-shadow: 0 0 12px rgba(0, 242, 254, 0.5);
        }

        .accordion-content {
            transition: max-height 0.35s ease-out, opacity 0.3s ease;
            max-height: 0;
            overflow: hidden;
            opacity: 0;
        }

        .accordion-item.active .accordion-content {
            max-height: 280px;
            opacity: 1;
        }

        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }

        /* Custom Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #070B14;
        }
        ::-webkit-scrollbar-thumb {
            background: #1E293B;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #00F2FE;
        }