/* roulang page: index */
:root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --accent-cyan: #06B6D4;
            --accent-emerald: #10B981;
            --accent-rose: #F43F5E;
            --bg-light: #F8FAFC;
            --bg-dark: #0F172A;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-ui: #E2E8F0;
        }

        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
            color: var(--text-body);
            background-color: var(--bg-light);
            line-height: 1.6;
            margin: 0;
            padding: 0;
        }

        .gradient-glow {
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.08) 0%, rgba(6, 182, 212, 0.08) 100%);
        }

        .text-gradient {
            background: linear-gradient(135deg, #4F46E5 0%, #06B6D4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .text-gradient-rose {
            background: linear-gradient(135deg, #F43F5E 0%, #FB7185 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-banner-bg {
            background: linear-gradient(rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.94)), url('/assets/images/4aabeef0d49f035f.jpg') center/cover no-repeat;
        }

        .card-custom {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .card-custom:hover {
            transform: translateY(-6px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
        }

        .glass-panel {
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(226, 232, 240, 0.8);
        }

        .glass-dark {
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        /* 手风琴原生样式补充 */
        details > summary {
            list-style: none;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }