/* roulang page: index */
:root {
            --primary-navy: #0A2540;
            --neural-blue: #0070F3;
            --clinical-teal: #00A88F;
            --slate-bg: #F8FAFC;
            --slate-muted: #F1F5F9;
            --deep-dark: #06152B;
            --text-heading: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-line: #E2E8F0;
        }
        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-body);
            background-color: #FFFFFF;
            -webkit-font-smoothing: antialiased;
        }
        .text-navy { color: var(--primary-navy); }
        .bg-navy { background-color: var(--primary-navy); }
        .text-emerald-brand { color: var(--clinical-teal); }
        .bg-emerald-brand { background-color: var(--clinical-teal); }
        .text-blue-brand { color: var(--neural-blue); }
        .bg-blue-brand { background-color: var(--neural-blue); }
        .border-line { border-color: var(--border-line); }
        .hero-mesh {
            background: linear-gradient(135deg, rgba(10, 37, 64, 0.95) 0%, rgba(6, 21, 43, 0.98) 100%),
                        radial-gradient(circle at 80% 20%, rgba(0, 168, 143, 0.25) 0%, transparent 60%);
        }
        .glow-card:hover {
            box-shadow: 0 12px 30px -10px rgba(0, 168, 143, 0.18), 0 4px 12px -2px rgba(10, 37, 64, 0.08);
            transform: translateY(-3px);
        }
        .gradient-border {
            position: relative;
            background: #FFFFFF;
        }
        .gradient-border::before {
            content: '';
            position: absolute;
            top: -1px; left: -1px; right: -1px; bottom: -1px;
            background: linear-gradient(135deg, #00A88F, #0070F3);
            border-radius: inherit;
            z-index: -1;
            opacity: 0.15;
            transition: opacity 0.3s ease;
        }
        .gradient-border:hover::before {
            opacity: 0.8;
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out, opacity 0.3s ease-out;
            opacity: 0;
        }
        .accordion-item.active .accordion-content {
            opacity: 1;
        }
        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }