/* roulang page: index */
:root {
            --primary: #0F52BA;
            --tech-cyan: #00A8E8;
            --navy-dark: #0A192F;
            --surface: #F8FAFC;
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--surface);
            color: #334155;
            overflow-x: hidden;
        }
        .hero-slide {
            transition: opacity 0.8s ease-in-out;
        }
        .accordion-content {
            transition: max-height 0.35s ease-out, opacity 0.25s ease-in;
        }
        .hide-scrollbar::-webkit-scrollbar {
            display: none;
        }
        .hide-scrollbar {
            -ms-overflow-style: none;
            scrollbar-width: none;
        }