/* roulang page: index */
:root {
            --color-primary: #06B6D4;
            --color-secondary: #3B82F6;
            --color-dark: #0B0F19;
            --color-card-bg: #FFFFFF;
        }
        body {
            font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: #475569;
            background-color: #F8FAFC;
            line-height: 1.65;
        }
        .text-gradient {
            background: linear-gradient(135deg, #06B6D4 0%, #3B82F6 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .text-gradient-purple {
            background: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .bg-gradient-brand {
            background: linear-gradient(135deg, #06B6D4 0%, #3B82F6 100%);
        }
        .bg-cyber-dark {
            background-color: #0B0F19;
            background-image: radial-gradient(circle at 50% 0%, rgba(59, 130, 246, 0.15) 0%, transparent 60%);
        }
        .glass-card-dark {
            background: rgba(15, 23, 42, 0.65);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .glass-header {
            backdrop-filter: blur(16px);
            background-color: rgba(255, 255, 255, 0.88);
        }