/* roulang page: index */
:root {
            --primary: #0F1F38;
            --primary-light: #1A3154;
            --cyan-accent: #0284C7;
            --cyan-bright: #06B6D4;
            --amber-alert: #D97706;
            --bg-light: #F8FAFC;
            --bg-card: #FFFFFF;
            --dark-contrast: #0A1120;
            --text-title: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-soft: #E2E8F0;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }

        body {
            background-color: var(--bg-light);
            color: var(--text-body);
            line-height: 1.75;
            overflow-x: hidden;
        }

        .hero-mesh-overlay {
            background: linear-gradient(135deg, rgba(15, 31, 56, 0.95) 0%, rgba(10, 17, 32, 0.88) 100%);
        }

        .glow-accent {
            box-shadow: 0 0 25px rgba(6, 182, 212, 0.25);
        }

        .card-custom {
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
            border: 1px solid var(--border-soft);
        }

        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px -6px rgba(15, 31, 56, 0.08), 0 8px 12px -4px rgba(15, 31, 56, 0.04);
            border-color: #BAE6FD;
        }

        .badge-cyan {
            background-color: #E0F2FE;
            color: #0369A1;
        }

        .badge-amber {
            background-color: #FEF3C7;
            color: #B45309;
        }

        .faq-accordion-item[open] .faq-arrow {
            transform: rotate(180deg);
        }

        /* 隐藏原生滚动条并优化触控 */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #F1F5F9;
        }
        ::-webkit-scrollbar-thumb {
            background: #CBD5E1;
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: #94A3B8;
        }