/* roulang page: index */
:root {
            --primary: #0A251D;
            --accent: #00E676;
            --speed: #CCFF00;
            --bg-light: #F8FAFC;
            --bg-carbon: #060D0A;
            --text-main: #0F172A;
            --text-sub: #64748B;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
            overflow-x: hidden;
        }
        .code-grid-bg {
            background-image: radial-gradient(rgba(0, 230, 118, 0.15) 1px, transparent 1px);
            background-size: 24px 24px;
        }
        .text-glow {
            text-shadow: 0 0 12px rgba(0, 230, 118, 0.5);
        }
        /* 原生 details 手风琴动画 */
        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }