/* roulang page: index */
:root {
            --bg-base: #060a17;
            --card-glass: rgba(13, 22, 45, 0.68);
            --border-glass: rgba(59, 130, 246, 0.22);
            --neon-cyan: #00f0ff;
            --neon-blue: #3b82f6;
        }
        body {
            background-color: var(--bg-base);
            color: #e2e8f0;
            overflow-x: hidden;
        }
        .glass-panel {
            background: var(--card-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
        }
        .glass-panel:hover {
            border-color: rgba(0, 240, 255, 0.45);
            box-shadow: 0 10px 30px -10px rgba(0, 240, 255, 0.15);
        }
        .btn-glow-primary {
            background: linear-gradient(135deg, #00f0ff 0%, #3b82f6 100%);
            color: #030712;
            font-weight: 600;
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.35);
            transition: all 0.3s ease;
        }
        .btn-glow-primary:hover {
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
        }
        .btn-glow-secondary {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid rgba(59, 130, 246, 0.4);
            color: #f8fafc;
            transition: all 0.3s ease;
        }
        .btn-glow-secondary:hover {
            background: rgba(59, 130, 246, 0.2);
            border-color: #00f0ff;
            color: #00f0ff;
        }
        .text-glow-cyan {
            text-shadow: 0 0 16px rgba(0, 240, 255, 0.5);
        }
        .radial-glow {
            background: radial-gradient(circle at 50% 30%, rgba(59, 130, 246, 0.18) 0%, rgba(6, 10, 23, 0) 70%);
        }
        /* FAQ手风琴样式 */
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }
        .faq-item.active .faq-answer {
            max-height: 240px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(180deg);
            color: #00f0ff;
        }