/* roulang page: index */
:root {
            --primary: #0F766E;
            --primary-light: #14B8A6;
            --accent: #4F46E5;
            --bg-base: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-base);
            color: #334155;
            overflow-x: hidden;
        }
        .hero-mesh-overlay {
            background: linear-gradient(135deg, rgba(2, 6, 23, 0.94) 0%, rgba(15, 23, 42, 0.88) 50%, rgba(15, 118, 110, 0.78) 100%);
        }
        .glow-card {
            box-shadow: 0 4px 20px -2px rgba(15, 118, 110, 0.08);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .glow-card:hover {
            box-shadow: 0 20px 25px -5px rgba(15, 118, 110, 0.16), 0 8px 10px -6px rgba(15, 118, 110, 0.12);
            transform: translateY(-4px);
        }
        .carousel-slide {
            transition: opacity 0.7s ease-in-out;
        }
        .accordion-content {
            transition: max-height 0.35s ease-out, opacity 0.3s ease-out;
            max-height: 0;
            overflow: hidden;
        }
        .accordion-content.active {
            max-height: 400px;
        }
        .tab-content {
            display: none;
        }
        .tab-content.active {
            display: block;
            animation: fadeIn 0.4s ease-in-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(6px); }
            to { opacity: 1; transform: translateY(0); }
        }