/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-dark: #1E3A8A;
            --primary-light: #3B82F6;
            --accent: #F59E0B;
            --bg-light: #F8FAFC;
            --text-main: #1E293B;
            --text-muted: #64748B;
            --border-color: #E2E8F0;
        }
        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
        }
        [id] {
            scroll-margin-top: 90px;
        }
        .hero-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.82) 100%), url('/assets/images/886fe71260c3b5eb.webp') center/cover no-repeat;
        }
        .philosophy-bg {
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 58, 138, 0.92) 100%), url('/assets/images/de1c43e5341ffecc.webp') center/cover no-repeat fixed;
        }
        .card-hover {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .card-hover:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 24px -6px rgba(30, 64, 175, 0.12), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        }
        details summary::-webkit-details-marker {
            display: none;
        }