/* roulang page: index */
:root {
            --primary-neon: #00E599;
            --primary-emerald: #059669;
            --dark-canvas: #0D1117;
            --dark-basalt: #1E293B;
            --text-heading: #0F172A;
            --text-body: #475569;
            --border-light: #E2E8F0;
            --border-dark: rgba(255, 255, 255, 0.08);
            --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
            --card-shadow-hover: 0 12px 30px -4px rgba(0, 229, 153, 0.12);
        }

        body {
            background-color: #FFFFFF;
            color: var(--text-body);
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }

        .hero-bg {
            background: linear-gradient(135deg, rgba(13, 17, 23, 0.94) 0%, rgba(30, 41, 59, 0.88) 100%), 
                        url('/assets/images/037bc6f2c37ec9e0.jpg') center/cover no-repeat;
        }

        .dark-tactics-bg {
            background: linear-gradient(180deg, #0D1117 0%, #161F2E 100%);
        }

        .grid-pattern {
            background-size: 32px 32px;
            background-image: linear-gradient(to right, rgba(0, 0, 0, 0.04) 1px, transparent 1px),
                              linear-gradient(to bottom, rgba(0, 0, 0, 0.04) 1px, transparent 1px);
        }

        .dark-grid-pattern {
            background-size: 36px 36px;
            background-image: linear-gradient(to right, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                              linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
        }

        .card-custom {
            border: 1px solid var(--border-light);
            box-shadow: var(--card-shadow);
            transition: all 0.28s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .card-custom:hover {
            transform: translateY(-3px);
            box-shadow: var(--card-shadow-hover);
            border-color: rgba(0, 229, 153, 0.45);
        }

        .badge-pill {
            font-family: 'DIN Alternate', 'Inter', sans-serif;
            letter-spacing: 0.05em;
        }

        /* Accordion transition styles */
        details summary::-webkit-details-marker {
            display: none;
        }
        details summary {
            list-style: none;
        }
        details[open] summary .faq-icon {
            transform: rotate(180deg);
            color: #059669;
        }

        /* Carousel transitions */
        .carousel-slide {
            display: none;
            opacity: 0;
            transition: opacity 0.5s ease-in-out;
        }
        .carousel-slide.active {
            display: block;
            opacity: 1;
        }

        /* Floating action bar styling */
        #floating-bar {
            transform: translateY(120%);
            transition: transform 0.35s ease;
        }
        #floating-bar.visible {
            transform: translateY(0);
        }