/* roulang page: index */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #EFF6FF;
            --text-heading: #0F172A;
            --text-body: #475569;
            --text-muted: #94A3B8;
            --bg-canvas: #F8FAFC;
            --card-shadow: 0 10px 30px -5px rgba(37, 99, 235, 0.05), 0 20px 25px -5px rgba(15, 23, 42, 0.03);
            --card-shadow-hover: 0 20px 35px -5px rgba(37, 99, 235, 0.12), 0 15px 20px -5px rgba(15, 23, 42, 0.06);
        }

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

        .custom-card-shadow {
            box-shadow: var(--card-shadow);
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1), border-color 0.3s;
        }

        .custom-card-shadow:hover {
            box-shadow: var(--card-shadow-hover);
            transform: translateY(-5px);
        }

        .glass-header {
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease-out;
        }

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

        .hero-mesh {
            background-image: radial-gradient(rgba(37, 99, 235, 0.08) 1px, transparent 1px), radial-gradient(rgba(37, 99, 235, 0.04) 1px, #f8fafc 1px);
            background-size: 24px 24px;
            background-position: 0 0, 12px 12px;
        }