/* roulang page: index */
:root {
            --primary: #0F5132;
            --primary-accent: #10B981;
            --accent-gold: #F59E0B;
            --dark-bg: #0B0F19;
            --light-bg: #F8FAFC;
            --border-light: rgba(226, 232, 240, 0.8);
            --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--light-bg);
            color: #334155;
            overflow-x: hidden;
        }
        .tabular-nums {
            font-variant-numeric: tabular-nums;
        }
        .hero-bg-overlay {
            background: linear-gradient(135deg, rgba(11, 15, 25, 0.94) 0%, rgba(15, 81, 50, 0.88) 100%);
        }
        .mesh-gradient-dark {
            background: radial-gradient(circle at 15% 20%, rgba(16, 185, 129, 0.15) 0%, transparent 40%),
                        radial-gradient(circle at 85% 80%, rgba(245, 158, 11, 0.1) 0%, transparent 45%),
                        #0B0F19;
        }
        .card-hover-effect {
            transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .card-hover-effect:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 30px -4px rgba(15, 81, 50, 0.12);
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }
        .accordion-content.open {
            max-height: 250px;
        }