/* roulang page: index */
:root {
            --primary: #0066FF;
            --accent: #FF5E1E;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #FFFFFF;
            line-height: 1.68;
        }
        .hero-bg {
            background-image: linear-gradient(rgba(11, 19, 32, 0.78), rgba(11, 19, 32, 0.88)), url('/assets/images/ec1a6646f299f6a7.webp');
            background-size: cover;
            background-position: center;
        }
        .showcase-bg {
            background-image: linear-gradient(rgba(11, 19, 32, 0.94), rgba(11, 19, 32, 0.96)), url('/assets/images/3ec326a8af0c4ea7.jpg');
            background-size: cover;
            background-position: center;
        }
        .banner-countdown {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }
        .card-shadow {
            box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 30px -4px rgba(0, 102, 255, 0.12);
        }
        details summary::-webkit-details-marker {
            display: none;
        }