/* roulang page: index */
:root {
            --bg-dark: #0F141C;
            --bg-surface: #161D27;
            --bg-card: #1D2533;
            --color-cyan: #00D2A0;
            --color-orange: #FF7A00;
            --color-blue: #2563EB;
            --border-glow: rgba(0, 210, 160, 0.18);
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-dark);
            color: #E2E8F0;
            overflow-x: hidden;
        }
        .glow-border {
            border: 1px solid var(--border-glow);
            box-shadow: 0 4px 20px -2px rgba(0, 210, 160, 0.08);
        }
        .glow-border:hover {
            border-color: rgba(0, 210, 160, 0.4);
            box-shadow: 0 8px 30px rgba(0, 210, 160, 0.16);
            transform: translateY(-2px);
            transition: all 0.25s ease-in-out;
        }
        .hero-pattern {
            background-image: radial-gradient(rgba(0, 210, 160, 0.08) 1px, transparent 0);
            background-size: 32px 32px;
        }
        details > summary {
            list-style: none;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }
        .btn-cyan {
            background-color: var(--color-cyan);
            color: #0B1118;
            font-weight: 600;
            transition: all 0.2s ease;
        }
        .btn-cyan:hover {
            background-color: #05f2b8;
            box-shadow: 0 0 16px rgba(0, 210, 160, 0.5);
            transform: translateY(-1px);
        }
        .btn-outline {
            border: 1px solid var(--color-cyan);
            color: var(--color-cyan);
            transition: all 0.2s ease;
        }
        .btn-outline:hover {
            background-color: rgba(0, 210, 160, 0.1);
            color: #ffffff;
        }