/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-hover: #1D4ED8;
            --accent: #0284C7;
            --cta: #EA580C;
            --dark-bg: #0F172A;
            --light-bg: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: #334155;
            background-color: #FFFFFF;
            line-height: 1.6;
        }
        .section-padding {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        @media (min-width: 1024px) {
            .section-padding {
                padding-top: 6rem;
                padding-bottom: 6rem;
            }
        }
        .hero-pattern {
            background-image: linear-gradient(rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.85)), url('/assets/images/f61f23bef36934ea.webp');
            background-size: cover;
            background-position: center;
        }
        .showcase-bg {
            background-image: linear-gradient(rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.95)), url('/assets/images/85adbeb7e4058e29.webp');
            background-size: cover;
            background-position: center;
        }
        details summary::-webkit-details-marker {
            display:none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }