/* roulang page: index */
:root {
            --brand-primary: #00C068;
            --brand-hover: #02a358;
            --brand-neon: #10FF8B;
            --brand-dark: #0F141C;
            --brand-slate: #132338;
            --brand-card-dark: #17212F;
            --brand-orange: #FF6B35;
            --brand-bg-light: #F6F8FA;
            --text-main: #1D2939;
            --text-muted: #667085;
            --border-light: rgba(226, 232, 240, 0.8);
            --shadow-soft: 0 10px 25px -5px rgba(15, 20, 28, 0.05), 0 8px 10px -6px rgba(15, 20, 28, 0.05);
            --shadow-elevated: 0 20px 30px -10px rgba(0, 192, 104, 0.12), 0 10px 15px -3px rgba(15, 20, 28, 0.06);
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
        }

        body {
            background-color: var(--brand-bg-light);
            color: var(--text-main);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        .font-mono-num {
            font-family: "DIN", "Roboto Mono", monospace, -apple-system;
        }

        .bg-mesh-dark {
            background-color: #0c1118;
            background-image: radial-gradient(rgba(0, 192, 104, 0.12) 1px, transparent 0), radial-gradient(rgba(19, 35, 56, 0.6) 1px, transparent 0);
            background-size: 28px 28px;
            background-position: 0 0, 14px 14px;
        }

        .card-blur-glass {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-soft);
        }

        .card-dark-glass {
            background: rgba(23, 33, 47, 0.85);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(0, 192, 104, 0.2);
        }

        .btn-lift {
            transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .btn-lift:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-elevated);
        }

        .badge-live-pulse::before {
            content: '';
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: #10FF8B;
            margin-right: 6px;
            animation: pulse-ring 1.8s cubic-bezier(0.455, 0.03, 0.515, 0.955) infinite;
        }

        @keyframes pulse-ring {
            0% { transform: scale(0.9); opacity: 1; }
            50% { transform: scale(1.3); opacity: 0.6; }
            100% { transform: scale(0.9); opacity: 1; }
        }

        .custom-accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0, 1, 0, 1);
        }

        .custom-accordion-open .custom-accordion-content {
            max-height: 400px;
            transition: max-height 0.45s ease-in-out;
        }

        .custom-accordion-open .custom-accordion-arrow {
            transform: rotate(180deg);
        }

        .tab-btn.active {
            background-color: #00C068;
            color: #ffffff;
            box-shadow: 0 4px 12px rgba(0, 192, 104, 0.3);
        }