/* roulang page: index */
:root {
            --bg-main: #060b18;
            --bg-secondary: #0c152e;
            --primary-blue: #0066ff;
            --accent-cyan: #00f2fe;
            --accent-orange: #ff5e3a;
            --card-bg: rgba(15, 23, 42, 0.72);
            --border-glass: rgba(0, 242, 254, 0.16);
            --border-glass-hover: rgba(0, 242, 254, 0.55);
        }
        * {
            box-sizing: border-box;
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-main);
            color: #cbd5e1;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }
        .glass-panel {
            background: var(--card-bg);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: 0 10px 36px 0 rgba(0, 0, 0, 0.45);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glass-panel:hover {
            border-color: var(--border-glass-hover);
            transform: translateY(-4px);
            box-shadow: 0 14px 40px 0 rgba(0, 242, 254, 0.18);
        }
        .glow-btn {
            background: linear-gradient(135deg, var(--primary-blue), #00d2ff);
            box-shadow: 0 0 22px rgba(0, 102, 255, 0.45);
            transition: all 0.25s ease;
        }
        .glow-btn:hover {
            box-shadow: 0 0 32px rgba(0, 242, 254, 0.75);
            filter: brightness(1.1);
            transform: scale(1.02);
        }
        .glow-btn-orange {
            background: linear-gradient(135deg, #ff5e3a, #ff2a55);
            box-shadow: 0 0 20px rgba(255, 94, 58, 0.45);
            transition: all 0.25s ease;
        }
        .glow-btn-orange:hover {
            box-shadow: 0 0 30px rgba(255, 94, 58, 0.7);
            filter: brightness(1.1);
        }
        .pulse-dot {
            box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.7);
            animation: pulse-ring 2s infinite cubic-bezier(0.66, 0, 0, 1);
        }
        @keyframes pulse-ring {
            0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 242, 254, 0.7); }
            70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 242, 254, 0); }
            100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 242, 254, 0); }
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }
        .accordion-content.active {
            max-height: 280px;
        }