/* roulang page: index */
:root {
            --brand-navy: #0F2B48;
            --brand-blue: #1B4965;
            --brand-emerald: #10B981;
            --brand-dark: #0A192F;
            --brand-surface: #F8FAFC;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            color: #0F172A;
            background-color: #F8FAFC;
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            line-height: 1.7;
        }
        .text-balance {
            text-wrap: balance;
        }
        .hero-bg {
            background-image: linear-gradient(135deg, rgba(15, 43, 72, 0.94) 0%, rgba(10, 25, 47, 0.96) 100%), url('/assets/images/fead45e39a9cb51b.webp');
            background-size: cover;
            background-position: center;
        }
        .dark-section-bg {
            background-image: radial-gradient(#1B4965 0.75px, transparent 0.75px), linear-gradient(to bottom, #0A192F, #081426);
            background-size: 24px 24px, 100% 100%;
        }
        .card-hover-effect {
            transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease, box-shadow 0.25s ease;
        }
        .card-hover-effect:hover {
            transform: translateY(-4px);
            border-color: #10B981;
            box-shadow: 0 16px 30px -10px rgba(15, 43, 72, 0.08);
        }
        details summary::-webkit-details-marker {
            display: none;
        }