/* roulang page: index */
:root {
            --primary: #5B21B6;
            --primary-accent: #7C3AED;
            --secondary: #06B6D4;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #475569;
            --border-color: #E2E8F0;
        }
        body {
            background-color: var(--bg-light);
            color: var(--text-main);
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .code-glow {
            box-shadow: 0 0 25px -5px rgba(6, 182, 212, 0.25), 0 0 10px -5px rgba(124, 58, 237, 0.3);
        }
        .gradient-border {
            border-image: linear-gradient(135deg, #7C3AED, #06B6D4) 1;
        }
        .accordion-content {
            transition: max-height 0.3s ease-out, opacity 0.2s ease;
        }