/* roulang page: index */
:root {
            --primary: #0F1E36;
            --accent: #C59B27;
            --alert: #D97706;
            --bg-light: #F8FAFC;
            --bg-gray: #F1F5F9;
            --border-ui: rgba(15, 30, 54, 0.08);
            --text-main: #1E293B;
            --text-muted: #64748B;
        }

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
            text-rendering: optimizeLegibility;
            -webkit-font-smoothing: antialiased;
        }

        body {
            color: var(--text-main);
            background-color: #FFFFFF;
            line-height: 1.75;
        }

        .hero-banner-bg {
            background-image: linear-gradient(180deg, rgba(15, 30, 54, 0.88) 0%, rgba(10, 20, 36, 0.96) 100%), url('/assets/images/f96a06db8fd5497e.webp');
            background-size: cover;
            background-position: center;
        }

        .tech-cases-bg {
            background-image: linear-gradient(180deg, rgba(15, 30, 54, 0.95) 0%, rgba(10, 20, 36, 0.98) 100%), url('/assets/images/71750f444d97e545.webp');
            background-size: cover;
            background-position: center;
        }

        .card-soft-shadow {
            box-shadow: 0 4px 20px -2px rgba(15, 30, 54, 0.05), 0 2px 6px -1px rgba(15, 30, 54, 0.03);
            border: 1px solid var(--border-ui);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .card-soft-shadow:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 28px -4px rgba(15, 30, 54, 0.1), 0 4px 10px -2px rgba(15, 30, 54, 0.05);
        }

        .section-py {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }

        @media (max-width: 768px) {
            .section-py {
                padding-top: 3.5rem;
                padding-bottom: 3.5rem;
            }
        }