/* roulang page: index */
:root {
            --primary: #F97316;
            --dark: #0F172A;
            --deep: #0B0F17;
            --slate-bg: #F8FAFC;
        }
        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: #0F172A;
            background-color: #FFFFFF;
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
        }
        .hero-overlay {
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.82) 0%, rgba(11, 15, 23, 0.94) 100%);
        }
        .dark-section-bg {
            background-color: #0B0F17;
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px -10px rgba(15, 23, 42, 0.12);
        }
        details summary::-webkit-details-marker {
            display:none;
        }