/* roulang page: index */
:root {
            --bg-base: #0A0D14;
            --bg-surface: #121722;
            --bg-elevated: #182030;
            --brand-primary: #00FFA3;
            --brand-secondary: #FF5500;
            --text-main: #F8FAFC;
            --text-muted: #94A3B8;
            --text-dark: #64748B;
            --border-line: #1E293B;
            --glow-primary: rgba(0, 255, 163, 0.18);
        }
        body {
            background-color: var(--bg-base);
            color: var(--text-main);
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.75;
            overflow-x: hidden;
        }
        .text-glow {
            text-shadow: 0 0 12px rgba(0, 255, 163, 0.45);
        }
        .box-glow {
            box-shadow: 0 0 25px var(--glow-primary);
        }
        .glass-nav {
            background: rgba(10, 13, 20, 0.88);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-line);
        }
        .border-glow:hover {
            border-color: var(--brand-primary);
            box-shadow: 0 0 20px rgba(0, 255, 163, 0.2);
        }
        .cyber-clip {
            clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
        }
        details > summary {
            list-style: none;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }