/* roulang page: index */
:root {
            --bg-base: #060B13;
            --bg-secondary: #0A111E;
            --primary-neon: #00F2FE;
            --primary-sky: #4FACFE;
            --accent-green: #00E5A3;
            --accent-purple: #7F00FF;
            --border-glass: rgba(0, 242, 254, 0.16);
            --border-glass-hover: rgba(0, 242, 254, 0.55);
            --text-base: #F8FAFC;
            --text-muted: #94A3B8;
        }

        body {
            background-color: var(--bg-base);
            color: var(--text-base);
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }

        /* Glassmorphism Classes */
        .glass-panel {
            background: rgba(15, 26, 46, 0.75);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border: 1px solid var(--border-glass);
            border-radius: 1rem;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .glass-panel:hover {
            border-color: var(--border-glass-hover);
            box-shadow: 0 12px 36px -10px rgba(0, 242, 254, 0.28);
            transform: translateY(-2px);
        }

        .glass-nav {
            background: rgba(6, 11, 19, 0.88);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 242, 254, 0.12);
        }

        /* Glowing Button Styles */
        .btn-glow {
            position: relative;
            background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
            color: #060B13;
            font-weight: 700;
            border-radius: 0.5rem;
            padding: 0.75rem 1.75rem;
            box-shadow: 0 0 25px rgba(0, 242, 254, 0.45);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

        .btn-glow:hover {
            box-shadow: 0 0 35px rgba(0, 242, 254, 0.7);
            transform: scale(1.02);
            color: #000;
        }

        .btn-secondary {
            background: rgba(15, 26, 46, 0.8);
            border: 1px solid rgba(0, 242, 254, 0.3);
            color: #E2E8F0;
            font-weight: 600;
            border-radius: 0.5rem;
            padding: 0.75rem 1.75rem;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
        }

        .btn-secondary:hover {
            border-color: var(--primary-neon);
            background: rgba(0, 242, 254, 0.1);
            color: #00F2FE;
        }

        /* Gradient Typography */
        .text-gradient {
            background: linear-gradient(135deg, #FFFFFF 20%, #00F2FE 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .text-gradient-purple {
            background: linear-gradient(135deg, #00F2FE 0%, #7F00FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        /* Section Separator & Padding */
        .section-block {
            padding: 5.5rem 1.25rem;
            position: relative;
        }

        @media (min-width: 1024px) {
            .section-block {
                padding: 7rem 2rem;
            }
        }

        /* Custom Scrollbar */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #060B13;
        }
        ::-webkit-scrollbar-thumb {
            background: #1E293B;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #00F2FE;
        }

        /* Accordion transition */
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 350px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: #00F2FE;
        }