/* roulang page: index */
:root {
            --brand-deep: #0F2B48;
            --brand-dark: #091E36;
            --brand-green: #00C07F;
            --brand-orange: #FF6B35;
            --brand-bg: #F8FAFC;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--brand-bg);
            color: #1E293B;
            line-height: 1.75;
        }
        .hero-bg {
            background-image: linear-gradient(135deg, rgba(9, 30, 54, 0.94) 0%, rgba(15, 43, 72, 0.92) 100%), url('/assets/images/a5d226ee486f5e6b.png');
            background-size: cover;
            background-position: center;
        }
        .section-dark {
            background-image: linear-gradient(180deg, rgba(9, 30, 54, 0.98) 0%, rgba(15, 43, 72, 0.95) 100%), url('/assets/images/341c155656562883.png');
            background-size: cover;
            background-position: center;
        }
        .custom-scrollbar::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        .custom-scrollbar::-webkit-scrollbar-thumb {
            background: #CBD5E1;
            border-radius: 3px;
        }
        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .faq-item.active .faq-content {
            max-height: 300px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }