/* roulang page: index */
:root {
            --bg-deep: #0A0E1A;
            --bg-card: rgba(15, 23, 42, 0.72);
            --border-glow: rgba(0, 240, 255, 0.18);
            --neon-blue: #0066FF;
            --neon-cyan: #00F0FF;
            --neon-purple: #7000FF;
        }

        body {
            background-color: var(--bg-deep);
            color: #94A3B8;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            overflow-x: hidden;
        }

        .glass-panel {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
        }

        .glass-card-hover {
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .glass-card-hover:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 15px 35px -5px rgba(0, 102, 255, 0.25);
        }

        .btn-glow {
            background: linear-gradient(135deg, #0066FF 0%, #00F0FF 100%);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
            transition: all 0.3s ease;
        }
        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
            transform: scale(1.02);
        }
        .btn-glow:active {
            transform: scale(0.99);
        }

        .text-gradient {
            background: linear-gradient(135deg, #FFFFFF 20%, #00F0FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-bg {
            background-image: radial-gradient(circle at 50% 20%, rgba(0, 102, 255, 0.15) 0%, transparent 60%),
                              linear-gradient(180deg, rgba(10, 14, 26, 0.85) 0%, #0A0E1A 100%),
                              url('/assets/images/87747bcc7c969e7d.webp');
            background-size: cover;
            background-position: center;
        }

        .accordion-content {
            transition: max-height 0.35s ease-out, opacity 0.3s ease;
            max-height: 0;
            opacity: 0;
            overflow: hidden;
        }
        .accordion-open .accordion-content {
            max-height: 300px;
            opacity: 1;
        }
        .accordion-icon {
            transition: transform 0.3s ease;
        }
        .accordion-open .accordion-icon {
            transform: rotate(180deg);
        }