/* roulang page: index */
:root {
            --primary: #00E599;
            --primary-dark: #00B377;
            --dark-bg: #0F172A;
            --text-main: #0F172A;
            --text-muted: #475569;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--text-main);
            background-color: #F8FAFC;
        }
        .cubic-trans {
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .btn-hover-shift:hover {
            transform: translateY(-2px);
        }
        .glass-header {
            backdrop-filter: blur(12px);
            background-color: rgba(255, 255, 255, 0.94);
        }