/* roulang page: index */
:root {
            --bg-deep: #06101E;
            --bg-card: #0B192C;
            --brand-cyan: #00D2D3;
            --accent-orange: #FF793F;
            --text-main: #FFFFFF;
            --text-sub: #94A3B8;
            --border-glow: rgba(0, 210, 211, 0.15);
        }
        body {
            background-color: var(--bg-deep);
            color: var(--text-main);
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
            line-height: 1.75;
        }
        .glow-border {
            border: 1px solid var(--border-glow);
            transition: all 0.3s ease;
        }
        .glow-border:hover {
            border-color: rgba(0, 210, 211, 0.5);
            transform: translateY(-4px);
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }
        .accordion-item.active .accordion-content {
            max-height: 240px;
        }
        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }