/* roulang page: index */
:root {
            --primary: #059669;
            --primary-light: #10B981;
            --accent: #06B6D4;
            --highlight: #F59E0B;
            --bg-main: #0F172A;
            --bg-card: #1E293B;
            --bg-deep: #0B0F19;
            --text-main: #F8FAFC;
            --text-muted: #94A3B8;
            --border-color: rgba(51, 65, 85, 0.6);
        }
        body {
            background-color: var(--bg-main);
            color: var(--text-main);
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        .custom-card {
            background: rgba(30, 41, 59, 0.7);
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .custom-card:hover {
            border-color: rgba(16, 185, 129, 0.4);
            transform: translateY(-2px);
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(16, 185, 129, 0.1);
        }
        .gradient-text-emerald {
            background: linear-gradient(135deg, #10B981 0%, #06B6D4 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .badge-glow {
            box-shadow: 0 0 15px rgba(16, 185, 129, 0.25);
        }
        .glass-panel {
            background: rgba(15, 23, 42, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(51, 65, 85, 0.6);
        }
        /* FAQ 折叠过渡 */
        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out, opacity 0.3s ease-out;
            opacity: 0;
        }
        .faq-content.active {
            max-height: 280px;
            opacity: 1;
        }