/* roulang page: index */
:root {
            --color-primary: #06B6D4;
            --color-secondary: #10B981;
            --color-dark: #0B0F19;
            --color-surface: #1E293B;
            --color-text-main: #F8FAFC;
            --color-text-muted: #94A3B8;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: #0B0F19;
            color: #F8FAFC;
            line-height: 1.75;
            scroll-behavior: smooth;
        }
        .text-gradient {
            background: linear-gradient(135deg, #06B6D4 0%, #10B981 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .glow-border {
            border: 1px solid rgba(6, 182, 212, 0.25);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.08);
        }
        .glow-border:hover {
            border-color: rgba(6, 182, 212, 0.6);
            box-shadow: 0 0 25px rgba(6, 182, 212, 0.2);
        }
        .card-bg {
            background: rgba(30, 41, 59, 0.7);
            backdrop-filter: blur(12px);
        }
        .tab-btn.active {
            border-color: #06B6D4;
            background-color: rgba(6, 182, 212, 0.15);
            color: #06B6D4;
        }
        input, select, textarea {
            background: #0F172A;
            border: 1px solid #334155;
            color: #F8FAFC;
        }
        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: #06B6D4;
            box-shadow: 0 0 0 2px rgba(6, 182, 212, 0.2);
        }