/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-light: #2563EB;
            --accent: #0284C7;
            --dark-surface: #0F172A;
            --body-bg: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #475569;
            --card-border: #E2E8F0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
            background-color: var(--body-bg);
            color: var(--text-main);
            overflow-x: hidden;
        }

        .hero-pattern {
            background-color: #0F172A;
            background-image: linear-gradient(rgba(15, 23, 42, 0.92), rgba(15, 23, 42, 0.95)), url('/assets/images/d4802d06d6f668bc.jpg');
            background-size: cover;
            background-position: center;
        }

        .cta-bg {
            background-image: linear-gradient(rgba(30, 64, 175, 0.94), rgba(15, 23, 42, 0.96)), url('/assets/images/04cd22e4297bfc63.jpg');
            background-size: cover;
            background-position: center;
        }

        .stat-badge {
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(2, 132, 199, 0.1) 100%);
        }

        .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(30, 64, 175, 0.08), 0 8px 10px -6px rgba(30, 64, 175, 0.04);
            transform: translateY(-4px);
        }

        .accordion-content {
            transition: max-height 0.3s ease-out;
            max-height: 0;
            overflow: hidden;
        }

        .accordion-item.active .accordion-content {
            max-height: 240px;
        }

        .accordion-item.active .chevron-icon {
            transform: rotate(180deg);
        }