/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-dark: #1E3A8A;
            --accent: #0EA5E9;
            --bg-light: #F8FAFC;
            --text-main: #0F172A;
            --text-muted: #475569;
            --border-color: #E2E8F0;
            --shadow-subtle: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.02);
            --shadow-hover: 0 20px 30px -10px rgba(15, 23, 42, 0.1), 0 10px 15px -5px rgba(14, 165, 233, 0.08);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: #FFFFFF;
            color: var(--text-main);
            overflow-x: hidden;
        }

        .card-custom {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 1rem;
            box-shadow: var(--shadow-subtle);
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: #CBD5E1;
        }

        .cta-btn {
            background: linear-gradient(135deg, #1E40AF 0%, #0EA5E9 100%);
            transition: all 0.3s ease;
        }

        .cta-btn:hover {
            background: linear-gradient(135deg, #1D4ED8 0%, #0284C7 100%);
            box-shadow: 0 10px 20px -5px rgba(14, 165, 233, 0.4);
            transform: translateY(-2px);
        }

        .badge-chip {
            background: rgba(14, 165, 233, 0.1);
            color: #0369A1;
            border: 1px solid rgba(14, 165, 233, 0.2);
        }

        .hero-banner-bg {
            background-image: linear-gradient(to bottom, rgba(15, 23, 42, 0.82), rgba(30, 64, 175, 0.75)), url('/assets/images/e701615adf208d59.jpg');
            background-size: cover;
            background-position: center;
        }

        .bg-pattern-subtle {
            background-color: var(--bg-light);
            background-image: radial-gradient(#CBD5E1 0.75px, transparent 0.75px);
            background-size: 24px 24px;
        }

        /* 手风琴原生交互控制 */
        details summary::-webkit-details-marker {
            display: none;
        }