/* roulang page: index */
:root {
            --primary: #4F46E5;
            --electric: #7C3AED;
            --text-main: #0F172A;
            --text-muted: #475569;
            --bg-light: #F8FAFC;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: var(--bg-light);
            scroll-behavior: smooth;
        }
        .text-gradient {
            background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #06B6D4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-banner-mask {
            background: linear-gradient(180deg, rgba(15, 23, 42, 0.78) 0%, rgba(15, 23, 42, 0.95) 100%);
        }
        .glass-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }