/* roulang page: index */
:root {
            --primary-green: #00E599;
            --primary-navy: #0F2438;
            --bg-dark: #0B0F17;
            --text-dark: #111827;
            --text-muted: #4B5563;
            --border-light: #E5E7EB;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #111827;
            background-color: #F8FAFC;
            line-height: 1.75;
        }
        .section-header {
            letter-spacing: -0.02em;
        }
        details summary::-webkit-details-marker {
            display: none;
        }