/* roulang page: index */
:root {
            --primary: #0052FF;
            --primary-dark: #0A192F;
            --accent: #00D66F;
            --accent-orange: #FF5B24;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-sub: #475569;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            color: var(--text-main);
            background-color: #ffffff;
        }
        .text-gradient {
            background: linear-gradient(135deg, #00D66F 0%, #0052FF 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .text-glow-gradient {
            background: linear-gradient(135deg, #FFFFFF 30%, #94A3B8 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-overlay {
            background: linear-gradient(180deg, rgba(6, 13, 26, 0.88) 0%, rgba(10, 25, 47, 0.95) 100%);
        }
        .accordion-content {
            transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
            max-height: 0;
            opacity: 0;
            overflow: hidden;
        }
        .accordion-item.active .accordion-content {
            max-height: 280px;
            opacity: 1;
        }
        .accordion-item.active .accordion-icon {
            transform: rotate(180deg);
        }