/* roulang page: index */
:root {
            --primary-gradient: linear-gradient(135deg, #1E40AF 0%, #0D9488 100%);
            --accent-color: #F59E0B;
            --bg-surface: #F8FAFC;
            --card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
            --card-hover-shadow: 0 25px 35px -5px rgba(30, 64, 175, 0.12), 0 10px 15px -5px rgba(13, 148, 136, 0.08);
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-surface);
            color: #334155;
            overflow-x: hidden;
        }

        .hero-banner-bg {
            background-image: linear-gradient(rgba(15, 23, 42, 0.88), rgba(15, 23, 42, 0.94)), url('/assets/images/b010761911aea5c1.webp');
            background-size: cover;
            background-position: center;
        }

        .app-stage-shadow {
            box-shadow: 0 25px 50px -12px rgba(15, 23, 42, 0.25), 0 0 0 1px rgba(255, 255, 255, 0.1);
        }

        .custom-card {
            box-shadow: var(--card-shadow);
            transition: all 0.28s ease;
        }
        .custom-card:hover {
            box-shadow: var(--card-hover-shadow);
            transform: translateY(-3px);
        }

        .gradient-text {
            background: linear-gradient(135deg, #2563EB 0%, #0D9488 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .cta-btn-glow {
            box-shadow: 0 10px 20px -5px rgba(245, 158, 11, 0.4);
        }
        .cta-btn-glow:hover {
            box-shadow: 0 14px 24px -5px rgba(245, 158, 11, 0.55);
        }

        details > summary {
            list-style: none;
        }
        details > summary::-webkit-details-marker {
            display: none;
        }