/* roulang page: index */
:root {
            --bg-color: #0D0F12;
            --primary: #00FF66;
            --accent: #FF522C;
            --border-line: rgba(255, 255, 255, 0.08);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
            scroll-behavior: smooth;
        }
        body {
            background-color: var(--bg-color);
            color: #F3F4F6;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
            line-height: 1.6;
        }
        .glow-btn:hover {
            box-shadow: 0 0 22px rgba(0, 255, 102, 0.35);
        }
        .card-panel {
            background: #16191E;
            border: 1px solid var(--border-line);
            transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .card-panel:hover {
            transform: translateY(-4px);
            border-color: rgba(0, 255, 102, 0.3);
            box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        details[open] summary svg {
            transform: rotate(180deg);
        }