/* roulang page: index */
:root {
            --primary: #6366F1;
            --primary-dark: #4F46E5;
            --accent: #10B981;
            --hot: #F43F5E;
            --bg-slate: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #475569;
        }
        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
        }
        body {
            background-color: var(--bg-slate);
            color: var(--text-main);
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        .hero-mesh {
            background-image: radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
                              radial-gradient(at 100% 100%, rgba(244, 63, 94, 0.08) 0px, transparent 50%),
                              radial-gradient(at 50% 50%, rgba(16, 185, 129, 0.06) 0px, transparent 50%);
        }
        .glass-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 30px -10px rgba(99, 102, 241, 0.15);
        }
        details summary::-webkit-details-marker {
            display:none;
        }