/* roulang page: index */
:root {
            --primary: #0F172A;
            --brand-blue: #0EA5E9;
            --accent-green: #10B981;
            --bg-light: #F8FAFC;
            --bg-dark: #0B0F19;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
            line-height: 1.75;
            color: #334155;
            background-color: #ffffff;
            overflow-x: hidden;
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(11, 15, 25, 0.96) 100%);
        }
        .glass-card {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(226, 232, 240, 0.8);
        }
        .glass-dark {
            background: rgba(15, 23, 42, 0.7);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hover-glow:hover {
            box-shadow: 0 10px 25px -5px rgba(14, 165, 233, 0.15), 0 8px 10px -6px rgba(14, 165, 233, 0.1);
            border-color: #0EA5E9;
        }
        .transition-all-300 {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }