/* roulang page: index */
:root {
            --brand-primary: #0F766E;
            --brand-hover: #0D9488;
            --brand-accent: #F97316;
            --brand-dark: #0F172A;
            --brand-gray: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            color: #334155;
            background-color: #FFFFFF;
        }
        .hero-banner-bg {
            background-image: linear-gradient(rgba(15, 23, 42, 0.78), rgba(15, 118, 110, 0.85)), url('/assets/images/7c2a93fc568791d3.png');
            background-size: cover;
            background-position: center;
        }
        .dark-section-bg {
            background: linear-gradient(135deg, #0F172A 0%, #134E4A 100%);
        }