/* roulang page: index */
:root {
            --bg-base: #070B19;
            --bg-card: rgba(15, 23, 42, 0.7);
            --border-glass: rgba(255, 255, 255, 0.08);
            --primary: #0066FF;
            --accent-cyan: #00F2FE;
            --accent-green: #00E676;
            --text-main: #FFFFFF;
            --text-sub: #94A3B8;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-base);
            color: #E2E8F0;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
            line-height: 1.6;
        }
        .glass-panel {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: 1rem;
            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 {
            transform: translateY(-4px);
            border-color: rgba(0, 102, 255, 0.4);
            box-shadow: 0 15px 35px -5px rgba(0, 102, 255, 0.25);
        }
        .btn-glow-primary {
            background: linear-gradient(135deg, #0066FF 0%, #0052CC 100%);
            box-shadow: 0 0 20px rgba(0, 102, 255, 0.4);
            transition: all 0.25s ease;
        }
        .btn-glow-primary:hover {
            filter: brightness(1.15);
            box-shadow: 0 0 25px rgba(0, 102, 255, 0.65);
        }
        .btn-glow-primary:active {
            transform: scale(0.97);
        }
        .btn-glow-secondary {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.25s ease;
        }
        .btn-glow-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--accent-cyan);
            color: #FFF;
        }
        .faq-item[open] summary svg {
            transform: rotate(180deg);
        }
        .faq-item[open] {
            border-left: 3px solid var(--accent-cyan);
        }