/* roulang page: index */
:root {
            --brand-green: #00C389;
            --brand-green-dark: #059669;
            --accent-orange: #FF6B00;
            --navy-deep: #0B0F19;
            --navy-card: #0F172A;
            --text-dark: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --bg-light: #F8FAFC;
            --border-light: #E2E8F0;
        }

        body {
            font-family: var(--font-sans, system-ui, -apple-system, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif);
            color: var(--text-body);
            background-color: #FFFFFF;
            line-height: 1.75;
            overflow-x: hidden;
        }

        .hero-gradient-overlay {
            background: linear-gradient(135deg, rgba(11, 15, 25, 0.95) 0%, rgba(15, 23, 42, 0.92) 50%, rgba(5, 150, 105, 0.85) 100%);
        }

        .cta-gradient-bg {
            background: linear-gradient(135deg, #0B0F19 0%, #0F172A 50%, #047857 100%);
        }

        .accordion-content {
            transition: max-height 0.35s ease-out, opacity 0.25s ease-in-out;
            max-height: 0;
            overflow: hidden;
            opacity: 0;
        }

        .accordion-content.active {
            max-height: 380px;
            opacity: 1;
        }

        .slide-item {
            display: none;
            opacity: 0;
            transition: opacity 0.6s ease-in-out;
        }

        .slide-item.active {
            display: block;
            opacity: 1;
        }

        .nav-blur-bg {
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            background-color: rgba(255, 255, 255, 0.92);
        }

        .data-card-shadow {
            box-shadow: 0 10px 30px -10px rgba(0, 195, 137, 0.15);
        }