/* roulang page: index */
:root {
            --primary: #1E40AF;
            --accent: #F97316;
            --text-main: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
            --bg-card: #FFFFFF;
        }
        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        }
        .card-shadow {
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-shadow:hover {
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
            transform: translateY(-4px);
        }
        .hero-bg {
            background-image: linear-gradient(to right, rgba(15, 23, 42, 0.92) 0%, rgba(30, 64, 175, 0.82) 100%), url('/assets/images/cdb729b0b06ce8b7.webp');
            background-size: cover;
            background-position: center;
        }
        .philosophy-bg {
            background-image: linear-gradient(180deg, rgba(15, 23, 42, 0.97) 0%, rgba(15, 23, 42, 0.94) 100%), url('/assets/images/92a6efd8eeec722d.webp');
            background-size: cover;
            background-position: center;
        }
        .accordion-content {
            transition: max-height 0.3s ease-out, opacity 0.3s ease-out;
            max-height: 0;
            opacity: 0;
            overflow: hidden;
        }
        .accordion-content.active {
            max-height: 250px;
            opacity: 1;
        }