/* roulang page: index */
:root {
            --brand-primary: #10b981;
            --brand-primary-hover: #059669;
            --brand-secondary: #2563eb;
            --brand-dark: #0f172a;
            --brand-surface: #ffffff;
            --brand-muted: #64748b;
            --brand-border: #e2e8f0;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        body {
            background-color: #f8fafc;
            color: #1e293b;
            overflow-x: hidden;
        }

        /* 统一平滑阴影过渡 */
        .card-elevated {
            transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-elevated:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }

        /* 原生手风琴细节优化 */
        details summary::-webkit-details-marker {
            display: none;
        }
        details summary {
            list-style: none;
        }
        details[open] summary .faq-icon {
            transform: rotate(180deg);
        }

        /* 霓虹发光与光斑背景 */
        .glow-effect {
            box-shadow: 0 0 50px -10px rgba(16, 185, 129, 0.35);
        }

        /* 滚动条美化 */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #0f172a;
        }
        ::-webkit-scrollbar-thumb {
            background: #334155;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #10b981;
        }