/* roulang page: index */
:root {
            --primary: #0F766E;
            --primary-hover: #115E59;
            --accent: #10B981;
            --bg-light: #F8FAFC;
            --border-color: #E2E8F0;
            --text-dark: #0F172A;
            --text-muted: #64748B;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            color: #1e293b;
            background-color: #ffffff;
            -webkit-font-smoothing: antialiased;
        }
        .tabular-nums {
            font-variant-numeric: tabular-nums;
        }
        .hero-headline {
            letter-spacing: -0.025em;
            line-height: 1.18;
        }
        .subtle-card {
            transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .subtle-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 16px 32px -8px rgba(15, 118, 110, 0.08), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
        }
        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }
        .faq-item.active .faq-content {
            max-height: 380px;
        }
        .faq-item.active .faq-chevron {
            transform: rotate(180deg);
        }
        .scan-line {
            animation: scanning 3.2s linear infinite;
        }
        @keyframes scanning {
            0% { top: 0%; opacity: 0.2; }
            50% { top: 92%; opacity: 0.9; }
            100% { top: 0%; opacity: 0.2; }
        }
        .dot-matrix-bg {
            background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
            background-size: 24px 24px;
        }