/* roulang page: index */
:root {
            --bg-base: #0B0D11;
            --bg-card: #12151C;
            --accent: #10B981;
            --accent-cyan: #06B6D4;
            --border-line: rgba(255, 255, 255, 0.08);
            --text-title: #FFFFFF;
            --text-body: #9CA3AF;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-body);
            letter-spacing: -0.01em;
            scroll-behavior: smooth;
        }
        .text-gradient {
            background: linear-gradient(135deg, #FFFFFF 20%, #10B981 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .code-glow {
            box-shadow: 0 0 35px -5px rgba(16, 185, 129, 0.15);
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }