/* roulang page: index */
:root {
            --primary: #1d4ed8;
            --primary-hover: #1e40af;
            --accent: #f97316;
            --text-main: #0f172a;
            --text-muted: #475569;
            --bg-light: #f8fafc;
            --border-color: #e2e8f0;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        body {
            color: var(--text-main);
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
        }
        .text-shadow-sm {
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
        }
        .text-shadow-lg {
            text-shadow: 0 4px 8px rgba(0, 0, 0, 0.7);
        }
        details summary::-webkit-details-marker {
            display: none;
        }