/* roulang page: index */
:root {
            --primary-dark: #0F172A;
            --accent-cyan: #06B6D4;
            --accent-sky: #0EA5E9;
            --hub-purple: #6366F1;
            --bg-light: #F8FAFC;
            --border-light: #E2E8F0;
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-light);
            color: #1E293B;
            line-height: 1.75;
        }
        .text-glow {
            text-shadow: 0 0 20px rgba(14, 165, 233, 0.4);
        }
        .glass-panel {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(226, 232, 240, 0.8);
        }
        .glass-dark {
            background: rgba(15, 23, 42, 0.75);
            backdrop-filter: blur(14px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .hero-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(11, 15, 25, 0.96) 100%), url('/assets/images/4af7862ba246aa59.jpg') center/cover no-repeat;
        }