/* roulang page: index */
:root {
            --primary: #00E599;
            --secondary: #0A1128;
            --surface-dark: #0D1527;
            --card-dark: #141E33;
            --text-main: #0F172A;
            --text-sub: #334155;
            --text-light: #F8FAFC;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            overflow-x: hidden;
        }
        .stat-number {
            font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
            font-weight: 700;
            letter-spacing: -0.05em;
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
        }
        .accordion-content.open {
            max-height: 500px;
            transition: max-height 0.3s ease-in-out;
        }