/* roulang page: index */
:root {
            --color-primary: #00F2FE;
            --color-secondary: #4FACFE;
            --color-bg-dark: #0B0F19;
            --color-card-bg: rgba(15, 23, 42, 0.75);
            --color-border: rgba(255, 255, 255, 0.08);
            --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--color-bg-dark);
            color: #E2E8F0;
            overflow-x: hidden;
        }

        .glass-panel {
            background: var(--color-card-bg);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--color-border);
        }

        .glass-panel:hover {
            border-color: rgba(0, 242, 254, 0.35);
            box-shadow: 0 10px 30px -10px rgba(0, 242, 254, 0.15);
        }

        .btn-glow {
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
            box-shadow: 0 0 25px rgba(0, 242, 254, 0.35);
            transition: all 0.3s ease;
        }

        .btn-glow:hover {
            box-shadow: 0 0 35px rgba(0, 242, 254, 0.6);
            transform: translateY(-2px);
        }

        .neon-text-gradient {
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .accordion-content.active {
            max-height: 250px;
            opacity: 1;
        }

        .metric-glow {
            text-shadow: 0 0 20px rgba(0, 242, 254, 0.5);
        }