/* roulang page: index */
:root {
            --bg-main: #0A0D14;
            --bg-card: #131722;
            --bg-card-hover: #1A2030;
            --primary: #6366F1;
            --accent-cyan: #06B6D4;
            --status-online: #10B981;
            --text-bright: #F8FAFC;
            --text-body: #94A3B8;
            --text-muted: #64748B;
            --border-subtle: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(99, 102, 241, 0.4);
        }
        body {
            background-color: var(--bg-main);
            color: var(--text-body);
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
        }
        .gradient-text {
            background: linear-gradient(135deg, #A5B4FC 0%, #6366F1 50%, #06B6D4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .btn-gradient {
            background: linear-gradient(135deg, #6366F1 0%, #4F46E5 50%, #06B6D4 100%);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .btn-gradient:hover {
            box-shadow: 0 0 25px rgba(99, 102, 241, 0.6);
            transform: translateY(-2px);
        }
        .glass-panel {
            background: rgba(19, 23, 34, 0.75);
            backdrop-filter: blur(16px);
            border: 1px solid var(--border-subtle);
        }
        .glass-panel:hover {
            border-color: var(--border-glow);
        }
        .code-block {
            background: #06080D;
            border: 1px solid rgba(255, 255, 255, 0.06);
            font-family: 'JetBrains Mono', Consolas, monospace;
        }
        .glow-circle {
            position: absolute;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(6, 182, 212, 0.05) 50%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        /* 自定义手风琴与标签页动画 */
        .tab-content { display: none; }
        .tab-content.active { display: block; animation: fadeIn 0.4s ease forwards; }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(6px); }
            to { opacity: 1; transform: translateY(0); }
        }