/* roulang page: index */
:root {
            --primary: #1e40af;
            --primary-light: #2563eb;
            --accent: #059669;
            --accent-light: #10b981;
            --bg-main: #f8fafc;
            --text-title: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
            color: var(--text-body);
            background-color: var(--bg-main);
            line-height: 1.7;
        }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(15, 23, 42, 0.88), rgba(30, 64, 175, 0.75)), url('/assets/images/cbdf7874a43a30d2.webp');
            background-size: cover;
            background-position: center;
        }
        .countdown-circle {
            background: conic-gradient(#10b981 var(--progress, 76%), #334155 0deg);
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
        }
        details summary::-webkit-details-marker {
            display: none;
        }