/* roulang page: index */
:root {
            --primary: #0F3836;
            --primary-light: #134E4A;
            --accent: #D97706;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --bg-light: #F8FAFC;
        }
        body {
            color: var(--text-main);
            background-color: #FFFFFF;
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            -webkit-font-smoothing: antialiased;
        }
        .hero-overlay {
            background: linear-gradient(135deg, rgba(11, 41, 40, 0.94) 0%, rgba(15, 56, 54, 0.88) 100%);
        }
        .accent-gradient {
            background: linear-gradient(135deg, #0F3836 0%, #134E4A 50%, #1E6B65 100%);
        }
        .cta-gradient {
            background: linear-gradient(135deg, #0F3836 0%, #0B2928 60%, #1a423f 100%);
        }
        .card-hover-effect {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover-effect:hover {
            transform: translateY(-4px);
            box-shadow: 0 14px 28px -6px rgba(15, 56, 54, 0.12), 0 8px 12px -4px rgba(15, 56, 54, 0.08);
        }
        details summary::-webkit-details-marker {
            display: none;
        }
        .carousel-slide {
            display: none;
            opacity: 0;
            transition: opacity 0.5s ease-in-out;
        }
        .carousel-slide.active {
            display: block;
            opacity: 1;
        }