/* roulang page: index */
:root {
            --primary: #4f46e5;
            --secondary: #06b6d4;
            --accent: #8b5cf6;
            --bg-base: #f8fafc;
            --text-main: #0f172a;
            --text-muted: #64748b;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
            overflow-x: hidden;
        }
        .text-gradient {
            background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #06b6d4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-bg-overlay {
            background: radial-gradient(circle at 70% 30%, rgba(99, 102, 241, 0.15) 0%, rgba(6, 182, 212, 0.05) 50%, transparent 70%);
        }
        .glass-panel {
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(226, 232, 240, 0.8);
        }
        .glass-dark {
            background: rgba(15, 23, 42, 0.8);
            backdrop-filter: blur(16px);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }