/* roulang page: index */
:root {
            --color-bg: #0A0B0E;
            --color-card: #12141A;
            --color-orange: #FF3300;
            --color-cyan: #00F5D4;
            --color-border: rgba(255, 255, 255, 0.08);
        }
        body {
            background-color: var(--color-bg);
            color: #C5CEE0;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .kinetic-border {
            border: 1px solid var(--color-border);
            transition: all 0.25s ease-in-out;
        }
        .kinetic-border:hover {
            border-color: rgba(255, 51, 0, 0.45);
            box-shadow: 0 4px 20px rgba(255, 51, 0, 0.12);
            transform: translateY(-2px);
        }
        .racing-cta {
            background-color: var(--color-orange);
            color: #000000;
            clip-path: polygon(8px 0%, 100% 0%, calc(100% - 8px) 100%, 0% 100%);
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            font-weight: 700;
        }
        .racing-cta:hover {
            background-color: #FF5522;
            box-shadow: 0 0 20px rgba(255, 51, 0, 0.5);
            transform: translateY(-1px);
        }
        .secondary-btn {
            border: 1px solid rgba(138, 153, 173, 0.35);
            color: #FFFFFF;
            transition: all 0.2s ease;
        }
        .secondary-btn:hover {
            border-color: var(--color-cyan);
            color: var(--color-cyan);
            background: rgba(0, 245, 212, 0.05);
        }
        .clip-racing-sm {
            clip-path: polygon(6px 0%, 100% 0%, calc(100% - 6px) 100%, 0% 100%);
        }
        details > summary::-webkit-details-marker {
            display: none;
        }